text:
Office of Scientific and Technical Information
U.S. Footage Drilled for Crude Oil, Natural Gas, and Dry ...
U.S. Energy Information Administration (EIA)
U.S. Footage Drilled for Crude Oil, Natural Gas, and Dry Exploratory and Developmental Wells (Thousand Feet)
Footage Drilled for Crude Oil and Natural Gas Wells
Gasoline and Diesel Fuel Update (EIA)
Footage Drilled for Crude Oil and Natural Gas Wells Footage Drilled for Crude Oil and Natural Gas Wells (Thousand Feet) Period: Annual Download Series History Download Series History Definitions, Sources & Notes Definitions, Sources & Notes 2003 2004 2005 2006 2007 2008 View History Exploratory and Development Wells 176,867 203,997 240,969 285,398 308,210 331,740 1949-2008 Crude Oil 38,495 42,032 51,511 63,649 66,527 88,382 1949-2008 Natural Gas 115,833 138,503 164,353 193,595 212,753 212,079 1949-2008 Dry Holes 22,539 23,462 25,104 28,154 28,931 31,280 1949-2008 Exploratory Wells 17,785 22,382 25,955 29,630 36,534 35,585 1949-2008 Crude Oil 2,453 3,141 4,262 4,998 6,271 7,389 1949-2008 Natural Gas 6,569 9,998 12,347 14,945 19,982 17,066 1949-2008 Dry Holes
U.S. Footage Drilled for Crude Oil, Natural Gas, and Dry Exploratory...
Wells (Thousand Feet) U.S. Footage Drilled for Crude Oil, Natural Gas, and Dry Exploratory Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...
U.S. Footage Drilled for Natural Gas Exploratory and Developmental...
and Developmental Wells (Thousand Feet) U.S. Footage Drilled for Natural Gas Exploratory and Developmental Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...
U.S. Footage Drilled for Crude Oil, Natural Gas, and Dry Developmental...
Developmental Wells (Thousand Feet) U.S. Footage Drilled for Crude Oil, Natural Gas, and Dry Developmental Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...
U.S. Footage Drilled for Crude Oil Exploratory and Developmental...
and Developmental Wells (Thousand Feet) U.S. Footage Drilled for Crude Oil Exploratory and Developmental Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...
U.S. Footage Drilled for Crude Oil Exploratory Wells (Thousand...
Annual Energy Outlook 2012 (EIA)
Wells (Thousand Feet) U.S. Footage Drilled for Crude Oil Exploratory Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1940's...
U.S. Footage Drilled for Natural Gas Exploratory Wells (Thousand...
Wells (Thousand Feet) U.S. Footage Drilled for Natural Gas Exploratory Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1940's...
U.S. Footage Drilled for Natural Gas Developmental Wells (Thousand...
Developmental Wells (Thousand Feet) U.S. Footage Drilled for Natural Gas Developmental Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...
U.S. Footage Drilled for Dry Exploratory Wells (Thousand Feet...
Wells (Thousand Feet) U.S. Footage Drilled for Dry Exploratory Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1940's 26,439...
U.S. Footage Drilled for Dry Exploratory and Developmental Wells...
and Developmental Wells (Thousand Feet) U.S. Footage Drilled for Dry Exploratory and Developmental Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6...
U.S. Footage Drilled for Dry Developmental Wells (Thousand Feet...
Developmental Wells (Thousand Feet) U.S. Footage Drilled for Dry Developmental Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...
U.S. Footage Drilled for Crude Oil Developmental Wells (Thousand...
Developmental Wells (Thousand Feet) U.S. Footage Drilled for Crude Oil Developmental Wells (Thousand Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...
Contractor's Storage Requirements Category Cubic Footage
NLE Websites -- All DOE Office Websites (Extended Search)
Footage Tunnel of Heat 98.36 Solar fountain 215.16 Tool Boxes 70.1 Bikes 100.66 EV Car Charging Station 22.78 Fuel Cell Booth wCartridges (Part of Hydrogen Booth) 20.79 Fuel...
U.S. uranium drilling in footage, 2004- 2011
Nuclear & Uranium - U.S. Energy Information Administration (EIA) - U.S. Energy Information Administration (EIA) U.S. Energy Information Administration - EIA - Independent...
Square Footage Measurements and Comparisons in 2001 RECS
A discussion on measurements and comparsions of total square footage as presented in the 2001 Residential Energy Consumption Survey
Query | Department of Energy
Energy.gov (U.S. Department of Energy (DOE)) Indexed Site
Query Query Query Query1.pdf Query More Documents & Publications DOE Retrospective Review Plan and Burden Reduction Report July 29, 2013 DOE Retrospective Review Plan and Burden...
BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010...
Field Sites Power Marketing Administration Other Agencies You are here Home BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (3 of 4) BP Oil Spill Footage...
Field Sites Power Marketing Administration Other Agencies You are here Home BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (2 of 4) BP Oil Spill Footage...
BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010...
Field Sites Power Marketing Administration Other Agencies You are here Home BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010 (1 of 4) BP Oil Spill Footage...
BP Oil Spill Footage (High Def) - Top Hat Procedure at 4850'...
BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (2 of 4) BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010 (1 of 4) Re-Building Greensburg The...
BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (3 of 4) BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (2 of 4) Re-Building Greensburg The...
BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (3 of 4) BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010 (1 of 4) Re-Building Greensburg The...
,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member"
U.S. Energy Information Administration (EIA) Indexed Site
1 Average Square Footage of Midwest Homes, by Housing Characteristics, 2009" 1 Average Square Footage of Midwest Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total Midwest",25.9,2272,1898,1372,912,762,551 "Midwest Divisions and States" "East North Central",17.9,2251,1869,1281,892,741,508 "Illinois",4.8,2186,1911,1451,860,752,571 "Michigan",3.8,1954,1559,962,729,582,359 "Wisconsin",2.3,2605,2091,1258,1105,887,534
3 Average Square Footage of West Homes, by Housing Characteristics, 2009" 3 Average Square Footage of West Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total West",24.8,1708,1374,800,628,506,294 "West Divisions and States" "Mountain",7.9,1928,1695,1105,723,635,415 "Mountain North",3.9,2107,1858,912,776,684,336 "Colorado",1.9,2082,1832,722,896,788,311 "Idaho, Montana, Utah, Wyoming",2,2130,1883,1093,691,610,354
Generating query substitutions
Science Conference Proceedings (OSTI)
We introduce the notion of query substitution, that is, generating a new query to replace a user's original search query. Our technique uses modifications based on typical substitutions web searchers make to their queries. In this way the new query is ... Keywords: paraphrasing, query rewriting, query substitution, sponsored search
Rosie Jones; Benjamin Rey; Omid Madani; Wiley Greiner
Table 1a. Effective, Occupied, and Vacant Square Footage, 1992
a. Occupied and Vacant Sq Ft a. Occupied and Vacant Sq Ft Table 1a. Effective, Occupied, and Vacant Square Footage, 1992 Building Characteristics All Buildings (thousand) Total Floorspace (million square feet) Total Occupied Floorspace (million square feet) Total Vacant Floorspace (million square feet) Occupied Square Footage as a Percent of Total All Buildings 4,779 67,072 61,325 5,746 91 Building Floorspace (Square Feet) 1,001 to 5,000 2,678 7,321 6,662 659 90 5,001 to 10,000 966 7,140 6,544 596 91 10,001 to 25,000 641 10,285 9,432 853 91 25,001 to 50,000 274 9,872 8,963 909 90 50,001 to 100,000 114 7,957 7,297 659 91 100,001 to 200,000 70 9,619 8,966 652 93 200,001 to 500,000 25 7,788 7,201 586 92 Over 500,000 9 7,087 6,257 829 88 Principal Building Activity Education 309 8,815 8,221 593 93 Food Sales and Service 413 2,375 2,166
2 Average Square Footage of South Homes, by Housing Characteristics, 2009" 2 Average Square Footage of South Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total South",42.1,1867,1637,1549,732,642,607 "South Divisions and States" "South Atlantic",22.2,1944,1687,1596,771,668,633 "Virginia",3,2227,1977,1802,855,759,692 "Georgia",3.5,2304,1983,1906,855,736,707 "Florida",7,1668,1432,1509,690,593,625 "DC, DE, MD, WV",3.4,2218,1831,1440,864,713,561
4 Average Square Footage of Single-Family Homes, by Housing Characteristics, 2009" 4 Average Square Footage of Single-Family Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total Single-Family",78.6,2422,2002,1522,880,727,553 "Census Region" "Northeast",12.7,2843,2150,1237,1009,763,439 "Midwest",19.2,2721,2249,1664,1019,842,624 "South",29.7,2232,1945,1843,828,722,684 "West",16.9,2100,1712,1009,725,591,348 "Urban and Rural3"
0 Average Square Footage of Northeast Homes, by Housing Characteristics, 2009" 0 Average Square Footage of Northeast Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total Northeast",20.8,2121,1663,921,836,656,363 "Northeast Divisions and States" "New England",5.5,2232,1680,625,903,680,253 "Massachusetts",2.5,2076,1556,676,850,637,277 "CT, ME, NH, RI, VT",3,2360,1781,583,946,714,234 "Mid-Atlantic",15.3,2080,1657,1028,813,647,402
6 Average Square Footage of Mobile Homes, by Housing Characteristics, 2009" 6 Average Square Footage of Mobile Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total Mobile Homes",6.9,1087,985,746,413,375,283 "Census Region" "Northeast",0.5,1030,968,711,524,492,362 "Midwest",1.1,1090,1069,595,400,392,218 "South",3.9,1128,1008,894,423,378,335 "West",1.4,995,867,466,369,322,173 "Urban and Rural3" "Urban",3.5,1002,919,684,396,364,271
9 Average Square Footage of U.S. Homes, by Housing Characteristics, 2009" 9 Average Square Footage of U.S. Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total",113.6,1971,1644,1230,766,639,478 "Census Region" "Northeast",20.8,2121,1663,921,836,656,363 "Midwest",25.9,2272,1898,1372,912,762,551 "South",42.1,1867,1637,1549,732,642,607 "West",24.8,1708,1374,800,628,506,294 "Urban and Rural3" "Urban",88.1,1857,1546,1148,728,607,450
5 Average Square Footage of Multi-Family Homes, by Housing Characteristics, 2009" 5 Average Square Footage of Multi-Family Homes, by Housing Characteristics, 2009" " Final" ,"Housing Units1","Average Square Footage Per Housing Unit",,,"Average Square Footage Per Household Member" "Housing Characteristics","Millions","Total2","Heated","Cooled","Total2","Heated","Cooled" "Total Multi-Family",28.1,930,807,535,453,393,261 "Census Region" "Northeast",7.6,991,897,408,471,426,194 "Midwest",5.6,957,857,518,521,466,282 "South",8.4,924,846,819,462,423,410 "West",6.5,843,606,329,374,269,146 "Urban and Rural3" "Urban",26.9,927,803,531,450,390,258
Drilling Systems | Open Energy Information
Open Energy Info (EERE)
source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Drilling Systems Jump to: navigation, search Contents 1 Geothermal Lab Call Projects for Drilling Systems 2 Geothermal ARRA Funded Projects for Drilling Systems Geothermal Lab Call Projects for Drilling Systems Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026
Distributed XML Query Processing.
E-Print Network (OSTI)
??While centralized query processing over collections of XML data stored at a single site is a well understood problem, centralized query evaluation techniques are inherently� (more)
Kling, Patrick
Field Sites Power Marketing Administration Other Agencies You are here Home BP Oil Spill Footage (High Def) - Top Hat Procedure at 4850' - June 3 2010 (4 of 4) BP Oil...
Backstage Footage from the ARPA-E Summit | Department of Energy
Backstage Footage from the ARPA-E Summit Backstage Footage from the ARPA-E Summit Backstage Footage from the ARPA-E Summit March 2, 2011 - 6:00am Addthis John Schueler John Schueler Former New Media Specialist, Office of Public Affairs Yesterday morning, Secretary Chu and Governor Arnold Schwarzenegger decided to drop in on a gathering of graduate students at the ARPA-E Energy Innovation Summit. Hailing from 30 different campuses, these students have been strong advocates for the sciences at their respective schools and represent the next generation of energy leaders. See what Secretary Chu, Governor Schwarzenegger and ARPA-E Director Arun Majumdar had to say to these talented young scholars during their surprise visit: John Schueler is a New Media Specialist with the Office of Public Affairs. Addthis
Geomodification in query rewriting
Web searchers signal their geographic intent by using placenames in search queries. They also indicate their flexibility about geographic specificity by reformulating their queries. We conducted experiments on geomodification in query rewriting. We examine both deliberate query rewriting, conducted in user search sessions, and automated query rewriting, with users evaluating the relevance of geo-modified queries. We find geo-specification in 12.7 % of user query rewrites in search sessions, and show the breakdown into sub-classes such as same-city, same-state, same-country and different-country. We also measure the dependence between US-state-name and distance-of-modified-location-from-originallocation, finding that Vermont web searchers modify their locations greater distances than California web searchers. We also find that automatically-modified queries are perceived as much more relevant when the geographic component is unchanged.
Vivian Wei Zhang; Benjamin Rey; Rosie Jones
Drill report
SciTech Connect
North Slope drilling activity is described. As of November 14, 1984, four rigs were actively drilling in the Kuparuk River field with another two doing workovers. Only one rig was drilling in the Prudhoe Bay field, with another doing workovers and one on standby.
Not Available
Query Explorativeness for Integrated Search
We consider query systems which allow imprecise queries and define a new property called query explorativeness. This property characteri es the transf ormations perf ormed by a system in order to answer imprecise queries, i.e. the system's "work"f or mapping input queries into more precise target queries.
In Heterogeneous Data; Ra Domenig; Klaus R. Dittrich
Efficient query expansion.
??Hundreds of millions of users each day search the web and other repositories to meet their information needs. However, queries can fail to find documents� (more)
Billerbeck, B
Queries, Data, and Statistics: Pick Two.
??The query processor of a relational database system executes declarative queries on relational data using query evaluation plans. The cost of the query evaluation plan� (more)
Mishra, Chaitanya
Continental drilling
DOE Green Energy (OSTI)
The Workshop on Continental Drilling was convened to prepare a report for submission to the US Geodynamics Committee with respect to the contribution that could be made by land drilling to resolve major problems of geodynamics and consider the mechanisms by which the responsibility for scientific planning, establishment of priorities, administration, and budgeting for a land-drilling program within the framework of the aims of the Geodynamics Project would best be established. A new and extensive program to study the continental crust is outlined in this report. The Workshop focused on the following topics: processes in the continental crust (mechanism of faulting and earthquakes, hydrothermal systems and active magma chambers); state and structure of the continental crust (heat flow and thermal structure of the crust; state of ambient stress in the North American plate; extent, regional structure, and evolution of crystalline continental crust); short hole investigations; present state and needs of drilling technology; drill hole experimentation and instrumentation; suggestions for organization and operation of drilling project; and suggested level of effort and funding. Four recommendations are set down. 8 figures, 5 tables. (RWR)
Shoemaker, E.M. (ed.)
Multi-aspect query summarization by composite query
Conventional search engines usually return a ranked list of web pages in response to a query. Users have to visit several pages to locate the relevant parts. A promising future search scenario should involve: (1) understanding user intents; (2) providing ... Keywords: composite query, mixture model, query aspect, query summarization
Wei Song; Qing Yu; Zhiheng Xu; Ting Liu; Sheng Li; Ji-Rong Wen
Complex Queries | Open Energy Information
Complex Queries Complex Queries < User:Jweers Jump to: navigation, search Contents 1 Using Nested Queries 1.1 Programs 2 Using Inverse Property Ask Query 3 Using Wildcards Plus Array Print with Count 3.1 States start with A (4) Using Nested Queries Complex Help:Inline queries are queries which involve multiple subjects, properties, or nested queries. The following is an example of a nested query which will return only Programs (Category:Programs) in the Energy Sector (Property:ProgramSector = Energy) within the subsector of Wind (Property:Sector = Wind) which have been developed by National Labs (Category:United States Department of Energy National Laboratories). The last piece mentioned is where the nested query comes into play. To find Programs which have been developed by National Labs, we must search the
QueryLines: approximate query for visual browsing
We introduce approximate query techniques for searching and analyzing two-dimensional data sets such as line or scatter plots. Our techniques allow users to explore a dataset by defining QueryLines: soft constraints and preferences for selecting and sorting a subset of the data. By using both preferences and soft constraints for query composition, we allow greater flexibility and expressiveness than previous visual query systems. When the user over-constrains a query, for example, a system using approximate techniques can display �near misses�to enable users to quickly and continuously refine queries.
Kathy Ryall; Neal Lesh; Hiroaki Miyashita; Shigeru Makino; Tom Lanning; Tom Lanning; Darren Leigh; Darren Leigh
Group Nearest Neighbor Queries
Given two sets of points P and Q, a group nearest neighbor(GNN) query retrieves the point(s) of P with the smallestsum of distances to all points in Q. Consider, for instance,three users at locations q1, q2 and q3 that want to find a meeting point (e.g., ...
Dimitris Papadias; Qiongmao Shen; Yufei Tao; Kyriakos Mouratidis
QueryScope: visualizing queries for repeatable database tuning
Reading and perceiving complex SQL queries has been a time consuming task in traditional database applications for decades. When it comes to decision support systems with automatically generated and sometimes highly nested SQL queries, human understanding ...
Ling Hu; Kenneth A. Ross; Yuan-Chi Chang; Christian A. Lang; Donghui Zhang
Auditing Categorical SUM, MAX and MIN Queries
Auditing consists in logging answered queries and checking, each time that a new query is submitted, that no sensitive information is disclosed by combining responses to answered queries with the response to the current query. Such a method for controlling ... Keywords: Aggregate function, max-query, min-query, null values, sum-query
Francesco M. Malvestuto
Drilling optimization using drilling simulator software
Drilling operations management will face hurdles to reduce costs and increase performance, and to do this with less experience and organizational drilling capacity. A technology called Drilling Simulators Software has shown an extraordinary potential to improve the drilling performance and reduce risk and cost. Different approaches have been made to develop drilling-simulator software. The Virtual Experience Simulator, geological drilling logs, and reconstructed lithology are some of the most successful. The drilling simulations can run multiple scenarios quickly and then update plans with new data to improve the results. Its storage capacity for retaining field drilling experience and knowledge add value to the program. This research shows the results of using drilling simulator software called Drilling Optimization Simulator (DROPS�) in the evaluation of the Aloctono block, in the Pirital field, eastern Venezuela. This formation is characterized by very complex geology, containing faulted restructures, large dips, and hard and abrasive rocks. The drilling performance in this section has a strong impact in the profitability of the field. A number of simulations using geological drilling logs and the concept of the learning curve defined the optimum drilling parameters for the block. The result shows that DROPS� has the capability to simulate the drilling performance of the area with reasonable accuracy. Thus, it is possible to predict the drilling performance using different bits and the learning-curve concept to obtain optimum drilling parameters. All of these allow a comprehensive and effective cost and drilling optimization.
Salas Safe, Jose Gregorio
Turnkey drilling
The recent surge in the popularity of turnkey drilling has produced a number of questions about turnkey operations from both operators and contractors. The International Association of Drilling Contractors (IADC) has no approved turnkey contract (although several of the member districts have printed one), leaving the parties participating in a turnkey well unsure of their responsibilities and obligations. Additionally, operators are finding liens filed against turnkey wells they thought were paid for. The term turnkey itself is often misunderstood and applied to a variety of guaranteed well commitments. Some turnkeys require the contractor to provide everything from location preparation to final production pipe or plugs. Others allow contingencies for stuck pipe, lost circulation, kicks and bad storms.
Pierce, D.
Mixed mode XML query processing
Querying XML documents typically involves both tree-based navigation and pattern matching similar to that used in structured information retrieval domains. In this paper, we show that for good performance, a native XML query processing system should ...
Alan Halverson; Josef Burger; Leonidas Galanis; Ameet Kini; Rajasekar Krishnamurthy; Ajith Nagaraja Rao; Feng Tian; Stratis D. Viglas; Yuan Wang; Jeffrey F. Naughton; David J. DeWitt
EIA 176 Query System, 2003
3 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2003 The EIA-176 Query System is a Windows-based system which runs under Windows operating systems 95,...
EIA 176 Query System, 2001
1 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2001 The EIA-176 Query system is a Windows-based system which runs under Windows operating systems 95,...
EIA 176 Query System, 2004
4 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2004 The EIA-176 Query System is a Windows-based system which runs under Windows operating systems 95,...
EIA 176 Query System, 2002
2 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2002 EIA 176 Query System 2002 Release date: February 2, 2004 Next release date: February 2005 The...
Automatic categorization of query results
Exploratory ad-hoc queries could return too many answers - a phenomenon commonly referred to as "information overload". In this paper, we propose to automatically categorize the results of SQL queries to address this problem. We dynamically generate ...
Kaushik Chakrabarti; Surajit Chaudhuri; Seung-won Hwang
compound queries | OpenEI Community
- 15:22 Multicolor Maps from Compound Queries ask queries compound queries developer Google maps maps multicolor result formats results Semantic Mediawiki Hi all, Recently, a...
ask queries | OpenEI Community
Query clustering using user logs
Query clustering is a process used to discover frequently asked questions or most popular topics on a search engine. This process is crucial for search engines based on question-answering. Because of the short lengths of queries, approaches based on ... Keywords: Query clustering, search engine, user log, web data mining
A Semantic Graph Query Language
Semantic graphs can be used to organize large amounts of information from a number of sources into one unified structure. A semantic query language provides a foundation for extracting information from the semantic graph. The graph query language described here provides a simple, powerful method for querying semantic graphs.
Kaplan, I L
Effective Occupied and Vacant Square Footage in Commercial Buildigs in 1992
Effective Occupied and Vacant Sq. Ft. Effective Occupied and Vacant Sq. Ft. Effective Occupied and Vacant Square Footage in Commercial Buildings in 1992 -- A Useful Benchmark of Commercial Floorspace Vacancy Rates -- Introduction One of the major approaches to analyzing energy use in end-use sectors is to relate energy use to measures of the extent of utilization of the sector, either in absolute terms or in terms relative to some maximum utilization level. For example, vehicle miles traveled is a measure of vehicle utilization in the transportation sector. The percent of maximum production capability at which an industry or an individual plant is operating is a measure of industrial capacity utilization in the industrial sector. For the commercial buildings sector, two concepts that measure how intensely a building is utilized seem to predominate: the number of hours the building is in operation and the amount of floorspace in the building that is occupied (or conversely, the amount that is vacant).
Y-12 Lease Summary Address* (Description) Square Footage Lease Term Expiration Date
Y-12 Lease Summary Y-12 Lease Summary Address* (Description) Square Footage Lease Term Expiration Date Onsite Leases 602 Scarboro Rd (New Hope Center) 137,758 square feet Five years 05/04/2012 301 Bear Creek Rd (Jack Case Center) 411,837 square feet Five years 05/04/2012 Offsite Leases 200 Summit Place (Records Storage) 24,585 square feet Five years 5/31/2015 113C Union Valley Rd (Analytical Lab) 18,450 square feet Five years 10/24/2015 115 Union Valley Rd (Warehouse) 28,800 square feet Five years 07/20/2015 1099 Commerce Park Dr. (UPF Project) 64,960 square feet One year 09/30/2011 2410 Cherahala Boulevard (UPF Project) 32,058 square feet Six Months 12/31/2011 Knoxville, Tennessee * Oak Ridge, Tennessee unless noted otherwise.
Drill string enclosure
DOE Patents (OSTI)
The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.
Jorgensen, D.K.; Kuhns, D.J.; Wiersholm, O.; Miller, T.A.
Jorgensen, Douglas K. (Idaho Falls, ID); Kuhns, Douglass J. (Idaho Falls, ID); Wiersholm, Otto (Idaho Falls, ID); Miller, Timothy A. (Idaho Falls, ID)
Analyzing linguistic structure of web search queries
It is believed that Web search queries are becoming more structurally complex over time. However, there has been no systematic study that quantifies such characteristics. In this thesis, we propose that queries are evolving into a unique linguistic system. ... Keywords: query intent, query segmentation, query structure, query understanding, word co-occurrence networks
Rishiraj Saha Roy
Semantic optimization techniques for preference queries
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). Such queries are parameterized by specific preference relations. Semantic optimization techniques ... Keywords: Integrity constraints, Preference queries, Query evaluation, Query optimization
Jan Chomicki
Evaluating verbose query processing techniques
Verbose or long queries are a small but significant part of the query stream in web search, and are common in other applications such as collaborative question answering (CQA). Current search engines perform well with keyword queries but are not, in general, effective for verbose queries. In this paper, we examine query processing techniques which can be applied to verbose queries prior to submission to a search engine in order to improve the search engine�s results. We focus on verbose queries that have sentence-like structure, but are not simple �wh- � questions, and assume the search engine is a �black box. � We evaluated the output of two search engines using queries from a CQA service and our results show that, among a broad range of techniques, the most effective approach is to simply reduce the length of the query. This can be achieved effectively by removing �stop structure � instead of only stop words. We show that the process of learning and removing stop structure from a query can be effectively automated.
Samuel Huston; W. Bruce Croft
4 4 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2004 The EIA-176 Query System is a Windows-based system which runs under Windows operating systems 95, 98, 2000, NT - 4.0 Service Pack 3 or later. It provides a method of extracting and using the company level data filed on the Form EIA-176, and saving the query results in various media and formats. There are pre-selected data queries, which allow the user to select and run the most often-used queries, as well as the ability to create a customized query. Self-extracting executable files with run-time versions of Access are required to set up the system. You may also download the data tables if you already have Microsoft Access on your computer. For instructions, please refer to the documentation listed below.
1 1 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2001 The EIA-176 Query system is a Windows-based system which runs under Windows operating systems 95, 98, 2000, NT - 4.0 Service Pack 3 or later. It provides a method of extracting and using the company level data filed on the Form EIA-176, and saving the query results in various media and formats. There are pre-selected data queries, which allow the user to select and run the most often-used queries, as well as the ability to create a customized query. Self-extracting executable files with run-time versions of Access are required to set up the system. You may also download the data tables if you already have Microsoft Access on your computer. For instructions, please read the documentation file(s) listed below
3 3 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2003 The EIA-176 Query System is a Windows-based system which runs under Windows operating systems 95, 98, 2000, NT - 4.0 Service Pack 3 or later. It provides a method of extracting and using the company level data filed on the Form EIA-176, and saving the query results in various media and formats. There are pre-selected data queries, which allow the user to select and run the most often-used queries, as well as the ability to create a customized query. Self-extracting executable files with run-time versions of Access are required to set up the system. You may also download the data tables if you already have Microsoft Access on your computer. For instructions, please refer to the documentation read the documentation file(s) listed below.
Structured Queries for Legal Search
... Track. It takes the keywords in RequestText to form a bag-of-words query using the �#combine� operator in In- dri. Common ...
CQ - Code selection through query.
??This thesis proposes a query language for code selection. It is designed to work on virtual machine based languages and is intended to be used� (more)
Query Expansion for Microblog Retrieval
... Specifically, we used the Google Search API (GSA) to retrieve pages from the Web, and used the titles to expand queries. ...
Exploiting underrepresented query aspects for automatic query expansion
Users attempt to express their search goals through web search queries. When a search goal has multiple components or aspects, documents that represent all the aspects are likely to be more relevant than those that only represent some aspects. Current ... Keywords: aspect coverage, global document analysis, query expansion, web search
Daniel Wayne Crabtree; Peter Andreae; Xiaoying Gao
Optimizing drilling performance using a selected drilling fluid
To improve drilling performance, a drilling fluid is selected based on one or more criteria and to have at least one target characteristic. Drilling equipment is used to drill a wellbore, and the selected drilling fluid is provided into the wellbore during drilling with the drilling equipment. The at least one target characteristic of the drilling fluid includes an ability of the drilling fluid to penetrate into formation cuttings during drilling to weaken the formation cuttings.
Judzis, Arnis (Salt Lake City, UT); Black, Alan D. (Coral Springs, FL); Green, Sidney J. (Salt Lake City, UT); Robertson, Homer A. (West Jordan, UT); Bland, Ronald G. (Houston, TX); Curry, David Alexander (The Woodlands, TX); Ledgerwood, III, Leroy W. (Cypress, TX)
Preference formulas in relational queries
The handling of user preferences is becoming an increasingly important issue in present-day information systems. Among others, preferences are used for information filtering and extraction to reduce the volume of data presented to the user. They ... Keywords: Preference queries, preferences, query optimization, relational algebra
Depth estimation for ranking query optimization
A relational ranking query uses a scoring function to limit the results of a conventional query to a small number of the most relevant answers. The increasing popularity of this query paradigm has led to the introduction of specialized rank join operators ... Keywords: DEEP, Data statistics, Depth estimation, Query optimization, Relational ranking query, Top-k
Karl Schnaitter; Joshua Spiegel; Neoklis Polyzotis
Context-sensitive query auto-completion
Query auto completion is known to provide poor predictions of the user's query when her input prefix is very short (e.g., one or two characters). In this paper we show that context, such as the user's recent queries, can be used to improve the prediction ... Keywords: context-awareness, query auto-completion, query expansion
Ziv Bar-Yossef; Naama Kraus
Bipolar queries: An aggregation operator focused perspective
The concept of a bipolar query, meant as a database query that involves both negative and positive conditions, is discussed from the point of view of flexible database querying and modeling of more sophisticated intentions and preferences of the user. ... Keywords: Aggregation operators, Bipolar queries, Flexible queries, Fuzzy logic, Logical connectives modeling
S?awomir Zadro?ny; Janusz Kacprzyk
Ontology-based automatic query refinement
The effectiveness of user query plays a vital role in retrieving highly relevant documents in keyword-based search engine. Because of the lack of domain knowledge, users tend to post very short queries, which do not express their information need ... Keywords: automatic query refinement, document retrieval, information retrieval, keywords, ontology, query expansion, retrieval relevancy, search engines, semantic search, user queries
S. Sendhilkumar; G. S. Mahalakshmi; S. N. Rajasekar
Advanced Drilling through Diagnostics-White-Drilling
A high-speed data link that would provide dramatically faster communication from downhole instruments to the surface and back again has the potential to revolutionize deep drilling for geothermal resources through Diagnostics-While-Drilling (DWD). Many aspects of the drilling process would significantly improve if downhole and surface data were acquired and processed in real-time at the surface, and used to guide the drilling operation. Such a closed-loop, driller-in-the-loop DWD system, would complete the loop between information and control, and greatly improve the performance of drilling systems. The main focus of this program is to demonstrate the value of real-time data for improving drilling. While high-rate transfer of down-hole data to the surface has been accomplished before, insufficient emphasis has been placed on utilization of the data to tune the drilling process to demonstrate the true merit of the concept. Consequently, there has been a lack of incentive on the part of industry to develop a simple, low-cost, effective high-speed data link. Demonstration of the benefits of DWD based on a high-speed data link will convince the drilling industry and stimulate the flow of private resources into the development of an economical high-speed data link for geothermal drilling applications. Such a downhole communication system would then make possible the development of surface data acquisition and expert systems that would greatly enhance drilling operations. Further, it would foster the development of downhole equipment that could be controlled from the surface to improve hole trajectory and drilling performance. Real-time data that would benefit drilling performance include: bit accelerations for use in controlling bit bounce and improving rock penetration rates and bit life; downhole fluid pressures for use in the management of drilling hydraulics and improved diagnosis of lost circulation and gas kicks; hole trajectory for use in reducing directional drilling costs; and downhole weight-on-bit and drilling torque for diagnosing drill bit performance. In general, any measurement that could shed light on the downhole environment would give us a better understanding of the drilling process and reduce drilling costs.
This invention is comprised of a drill string enclosure which consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.
Geothermal drilling technology update
Sandia National Laboratories conducts a comprehensive geothermal drilling research program for the US Department of Energy, Office of Geothermal Technologies. The program currently includes seven areas: lost circulation technology, hard-rock drill bit technology, high-temperature instrumentation, wireless data telemetry, slimhole drilling technology, Geothermal Drilling Organization (GDO) projects, and drilling systems studies. This paper describes the current status of the projects under way in each of these program areas.
Glowka, D.A.
Complex spatio-temporal pattern queries
This paper introduces a novel type of query, what we name Spatio-temporal Pattern Queries (STP). Such a query specifies a spatiotemporal pattern as a sequence of distinct spatial predicates where the predicate temporal ordering (exact or relative) ...
Marios Hadjieleftheriou; George Kollios; Petko Bakalov; Vassilis J. Tsotras
2 2 EIA Home > Natural Gas > Natural Gas Data Publications EIA 176 Query System 2002 EIA 176 Query System 2002 Release date: February 2, 2004 Next release date: February 2005 The EIA-176 Query system is a Windows-based system which runs under Windows operating systems 95, 98, 2000, NT - 4.0 Service Pack 3 or later. It provides a method of extracting and using the company level data filed on the Form EIA-176, and saving the query results in various media and formats. There are pre-selected data queries, which allow the user to select and run the most often-used queries, as well as the ability to create a customized query. Self-extracting executable files with run-time versions of Access are required to set up the system. You may also download the data tables if you already have Microsoft Access on your computer. For instructions, please read the documentation file(s) listed below.
Drilling for energy resources
Drilling is integral to the exploration, development, and production of most energy resources. Oil and natural gas, which are dependent on drilling technology, together account for about 77% of the energy sources consumed in the US. Thus, the limitations of current drilling technology also restrict the rate at which new energy supplies can be found, extracted, and brought to the marketplace. The purpose of the study reported was to examine current drilling technology, suggest areas where additional research and development (R and D) might significantly increase drilling rates and capabilities, and suggest a strategy for improving drilling technology. An overview is provided of the US drilling industry. The drilling equipment and techniques now used for finding and recovering oil, natural gas, coal, shale oil, nuclear fuels, and geothermal energy are described. Although by no means exhaustive, these descriptions provide the background necessary to adequately understand the problems inherent in attempts to increase instantaneous and overall drilling rates.
Navigation drilling technology progresses
This article reports that navigation drilling - an approach that combines advanced drill bit, downhole motor, measurement-while-drilling, and well planning technology into an integrated, steerable drilling system - has reduced drilling time for operating companies worldwide. A major operating advantage of navigation drilling is the ability to drill both straight and directional intervals with a single assembly. In conventional directional drilling, a bent sub and downhole motor (or a bent housing motor) are used to initiate kick-offs and make course corrections. The bent sub is made-up above the motor, tilting the motor's axis 1 to 3 degrees compared to the axis of the drill string. The assembly toolface can be aligned in the desired direction with a single-shot, a steering tool or an MWD system.
Bayne, R.
SPARQL Query Form | OpenEI
624878 Varnish cache server SPARQL Query Form Default Graph URI Query text select distinct ?Concept where a ?Concept LIMIT 100 Display Results As: Auto HTML Spreadsheet XML...
Well drilling apparatus and method
Well drilling rates may be increased by impelling projectiles to fracture rock formations and drilling with rock drill bits through the projectile fractured rock.
Alvis, Robert L. (Albuquerque, NM); Newsom, Melvin M. (Albuquerque, NM)
EIA 176 Query System, 2000
The EIA-176 Query system is a Windows-based system which runs under Windows operating systems 95, 98, 2000, NT - 4.0 Service Pack 3 or later.
The EIA-176 Query System is a Windows-based system which runs under Windows operating systems 95, 98, 2000, NT - 4.0 Service Pack 3 or later. It provides a method of ...
EIA-176 Query System 2005
Release Date: November 22, 2006 The EIA-176 Query System is a Windows-based system which runs under Windows operating systems 95, 98, 2000, NT - 4.0 Service Pack 3 or ...
Adaptively parallelizing distributed range queries
We consider the problem of how to best parallelize range queries in a massive scale distributed database. In traditional systems the focus has been on maximizing parallelism, for example by laying out data to achieve the highest throughput. However, ...
Ymir Vigfusson; Adam Silberstein; Brian F. Cooper; Rodrigo Fonseca
Usability of XML Query Languages.
??The eXtensible Markup Language (XML) is a markup language which enables re-use of information. Specific query languages for XML are developed to facilitate this. There� (more)
Graaumans, Joris Petrus Maria
Multi-query SQL progress indicators
Abstract. Recently, progress indicators have been proposed for SQL queries in RDBMSs. All previously proposed progress indicators consider each query in isolation, ignoring the impact simultaneously running queries have on each other�s performance. In this paper, we explore a multi-query progress indicator, which explicitly considers concurrently running queries and even queries predicted to arrive in the future when producing its estimates. We demonstrate that multi-query progress indicators can provide more accurate estimates than single-query progress indicators. Moreover, we extend the use of progress indicators beyond being a GUI tool and show how to apply multi-query progress indicators to workload management. We report on an initial implementation of a multi-query progress indicator in PostgreSQL and experiments with its use both for estimating remaining query execution time and for workload management. 1
Gang Luo; Jeffrey F. Naughton; Philip S. Yu
DRILLED HYDROTHERMAL ENERGY Drilling for seawater
technologies to obtain thermal energy (and other benefits) from a large body of water #12;Microgrid Customer ENERGY : Underground Technologies #12;#12;Microgrid Customer Facilities Drilled Hydrothermal Energy Plant;#12;Microgrid Customer Facilities Drilled Hydrothermal Energy Plant Cooling Power Biofuel / H2 Fresh Water
Drilling Fluid Corrosion
Table 8 Drilling fluid corrosion control troubleshooting chart...Table 8 Drilling fluid corrosion control troubleshooting chart Corrosion cause Primary source Identification Major corrosion forms Remedies Oxygen Atmosphere, mud conditioning, equipment, oxidizing
Hydromechanical drilling device
A hydromechanical drilling tool which combines a high pressure water jet drill with a conventional roller cone type of drilling bit. The high pressure jet serves as a tap drill for cutting a relatively small diameter hole in advance of the conventional bit. Auxiliary laterally projecting jets also serve to partially cut rock and to remove debris from in front of the bit teeth thereby reducing significantly the thrust loading for driving the bit.
Summers, David A. (Rolla, MO)
HydroPulse Drilling
Tempress HydroPulse{trademark} tool increases overbalanced drilling rates by generating intense suction pulses at the drill bit. This report describes the operation of the tool; results of pressure drilling tests, wear tests and downhole drilling tests; and the business case for field applications. The HydroPulse{trademark} tool is designed to operate on weighted drilling mud at conventional flow rates and pressures. Pressure drilling tests confirm that the HydroPulse{trademark} tool provides 33% to 200% increased rate of penetration. Field tests demonstrated conventional rotary and mud motor drilling operations. The tool has been operated continuous for 50 hours on weighted mud in a wear test stand. This level of reliability is the threshold for commercial application. A seismic-while-drilling version of the tool was also developed and tested. This tool was used to demonstrate reverse vertical seismic profiling while drilling an inclined test well with a PDC bit. The primary applications for the HydroPulse{trademark} tool are deep onshore and offshore drilling where rate of penetration drives costs. The application of the seismic tool is vertical seismic profiling-while-drilling and look-ahead seismic imaging while drilling.
J.J. Kolle
Challenges of deep drilling
Deep drilling poses major problems when high temperatures, high pressures, and acid gases are encountered. A combination of these items usually requires extensive planning, exotic materials, long drilling times, and heavy expenditures. Only 2 wells have been drilled below 30,000 ft in the US, the deeper a 31,441-ft hole in 1974. The deepest well in the world is reported to be in the Soviet Union, recently drilled below 34,895 ft, with a target depth of 15,000 m (49,212 ft). A review of current deep drilling technology and its capabilities is given.
Chadwick, C.E.
On implementing provenance-aware regular path queries with relational query engines
Use of graphs is growing rapidly in social networks, semantic web, biological databases, scientific workflow provenance, and other areas. Regular Path Queries (RPQs) can be seen as a core graph query language to answer pattern-based reachability queries. ... Keywords: datalog, graph querying, regular path queries
Saumen Dey; V�ctor Cuevas-Vicentt�n; Sven K�hler; Eric Gribkoff; Michael Wang; Bertram Lud�scher
Advanced drilling systems study
This work was initiated as part of the National Advanced Drilling and Excavation Technologies (NADET) Program. It is being performed through joint finding from the Department of Energy Geothermal Division and the Natural Gas Technology Branch, Morgantown Energy Technology Center. Interest in advanced drilling systems is high. The Geothermal Division of the Department of Energy has initiated a multi-year effort in the development of advanced drilling systems; the National Research Council completed a study of drilling and excavation technologies last year; and the MIT Energy Laboratory recently submitted a proposal for a national initiative in advanced drilling and excavation research. The primary reasons for this interest are financial. Worldwide expenditures on oil and gas drilling approach $75 billion per year. Also, drilling and well completion account for 25% to 50% of the cost of producing electricity from geothermal energy. There is incentive to search for methods to reduce the cost of drilling. Work on ideas to improve or replace rotary drilling technology dates back at least to the 1930`s. There was a significant amount of work in this area in the 1960`s and 1970`s; and there has been some continued effort through the 1980`s. Undoubtedly there are concepts for advanced drilling systems that have yet to be studied; however, it is almost certain that new efforts to initiate work on advanced drilling systems will build on an idea or a variation of an idea that has already been investigated. Therefore, a review of previous efforts coupled with a characterization of viable advanced drilling systems and the current state of technology as it applies to those systems provide the basis for the current study of advanced drilling.
Pierce, K.G. [Sandia National Labs., Albuquerque, NM (United States); Livesay, B.J. [Livesay Consultants, San Diego, CA (United States)
SEMISTRUCTURED PROBABILISTIC OBJECT QUERY LANGUAGE (A Query Language for Semistructured Probabilistic Data).
??This work presents SPOQL, a structured query language for Semistructured Probabilistic Object (SPO) model [4]. The original query language for semistructured probabilistic database management system� (more)
Gutti, Praveen
Method of deep drilling
Deep drilling is facilitated by the following steps practiced separately or in any combination: (1) Periodically and sequentially fracturing zones adjacent the bottom of the bore hole with a thixotropic fastsetting fluid that is accepted into the fracture to overstress the zone, such fracturing and injection being periodic as a function of the progression of the drill. (2) Casing the bore hole with ductile, pre-annealed casing sections, each of which is run down through the previously set casing and swaged in situ to a diameter large enough to allow the next section to run down through it. (3) Drilling the bore hole using a drill string of a low density alloy and a high density drilling mud so that the drill string is partially floated.
Colgate, Stirling A. (4616 Ridgeway, Los Alamos, NM 87544)
Drilling in the Rockies
Despite rugged drilling conditions and high drilling costs, rig employment and drilling operations in the Rocky Mountain region of the Overthrust Belt have increased significantly since 1979. Rate of rig employment, well depths, and number of operating companies and contractors in the area are reported. By October 1980, more than 500 active rigs were working in the region, 30% more than were working during the entirety of 1979. (3 photos)
Peacock, D.
Remote drill bit loader
A drill bit loader is described for loading a tapered shank of a drill bit into a similarly tapered recess in the end of a drill spindle. The spindle has a transverse slot at the inner end of the recess. The end of the tapered shank of the drill bit has a transverse tang adapted to engage in the slot so that the drill bit will be rotated by the spindle. The loader is in the form of a cylinder adapted to receive the drill bit with the shank projecting out of the outer end of the cylinder. Retainer pins prevent rotation of the drill bit in the cylinder. The spindle is lowered to extend the shank of the drill bit into the recess in the spindle and the spindle is rotated to align the slot in the spindle with the tang on the shank. A spring unit in the cylinder is compressed by the drill bit during its entry into the recess of the spindle and resiliently drives the tang into the slot in the spindle when the tang and slot are aligned. In typical remote drilling operations, whether in hot cells or water pits, drill bits have been held using a collet or end mill type holder with set screws. In either case, to load or change a drill bit required the use master-slave manipulators to position the bits and tighten the collet or set screws. This requirement eliminated many otherwise useful work areas because they were not equipped with slaves, particularly in water pits.
Dokos, J.A.
Geothermal Drilling Organization
The Geothermal Drilling Organization (GDO), founded in 1982 as a joint Department of Energy (DOE)-Industry organization, develops and funds near-term technology development projects for reducing geothermal drilling costs. Sandia National Laboratories administers DOE funds to assist industry critical cost-shared projects and provides development support for each project. GDO assistance to industry is vital in developing products and procedures to lower drilling costs, in part, because the geothermal industry is small and represents a limited market.
Sattler, A.R.
Drill Press Speed Chart
operating speeds (RPM) Accessory Softwood (Pine) Hardwood (Hard Maple) Acrylic Brass Aluminum Steel Shop Notes Twist drill bits 116" - 316" 14" - 38" 716"- 58" 11...
Drilling motor deviation tool
An extension for a down hole drilling motor is described, which adapts the motor for selective configuration for straight hole drilling or directional drilling, selectively. It consists of: an elongated generally tubular body, adapted at a first end to rigidly attach to the lower end of a down hole drilling motor housing, the body having an opening extending along the general centerline of the body; fluid channel means situated in the opening to conduct drilling fluid from the motor fluid output means to a downwardly continuing drill string element; output shaft means situated in the body and extending from a second end of the body, the output shaft adapted at the extended extreme for attachment to a downwardly continuing drill string element; selector valve means situated in the body, operatively associated with drilling fluid channels in the body, responsive to drilling fluid flow to produce a first output signal in response to fluid flow manipulations having a first characteristic and to produce a second output signal in response to fluid flow manipulations having a second characteristic; and driveshaft connector means in the opening, operatively associated with the output shaft of the motor and the output shaft means to connect the two for sympathetic rotation.
Falgout, T.E.; Schoeffler, W.N.
Managed Pressure Drilling Candidate Selection
Managed Pressure Drilling now at the pinnacle of the 'Oil Well Drilling' evolution tree, has itself been coined in 2003. It is an umbrella term for a few new drilling techniques and some preexisting drilling techniques, all of them aiming to solve several drilling problems, including non-productive time and/or drilling flat time issues. These techniques, now sub-classifications of Managed Pressure Drilling, are referred to as 'Variations' and 'Methods' of Managed Pressure Drilling. Although using Managed Pressure Drilling for drilling wells has several benefits, not all wells that seem a potential candidate for Managed Pressure Drilling, need Managed Pressure Drilling. The drilling industry has numerous simulators and software models to perform drilling hydraulics calculations and simulations. Most of them are designed for conventional well hydraulics, while some can perform Underbalanced Drilling calculations, and a select few can perform Managed Pressure Drilling calculations. Most of the few available Managed Pressure Drilling models are modified Underbalanced Drilling versions that fit Managed Pressure Drilling needs. However, none of them focus on Managed Pressure Drilling and its candidate selection alone. An 'Managed Pressure Drilling Candidate Selection Model and software' that can act as a preliminary screen to determine the utility of Managed Pressure Drilling for potential candidate wells are developed as a part of this research dissertation. The model and a flow diagram identify the key steps in candidate selection. The software performs the basic hydraulic calculations and provides useful results in the form of tables, plots and graphs that would help in making better engineering decisions. An additional Managed Pressure Drilling worldwide wells database with basic information on a few Managed Pressure Drilling projects has also been compiled that can act as a basic guide on the Managed Pressure Drilling variation and project frequencies and aid in Managed Pressure Drilling candidate selection.
Nauduri, Anantha S.
A system for semantic query optimization
This paper describes a scheme to utilize semantic integrity constraints in optimizing a user specified query. The scheme uses a graph theoretic approach to identify redundant join clauses and redundant restriction clauses specified in a user query. An ...
Sreekumar T. Shenoy; Z. Meral Ozsoyoglu
Query expansion techniques for question answering
Query expansion is a technique used to boost performance of a document retrieval engine, such as those commonly found in question answering (QA) systems. Common methods of query expansion for Boolean keyword-based document ...
Bilotti, Matthew W. (Matthew William), 1981-
Category:Query Results Templates | Open Energy Information
Query Results Templates Jump to: navigation, search This is the Query Results Templates category. Pages in category "Query Results Templates" The following 4 pages are in this...
Answering XML queries using materialized views revisited
Answering queries using views is a well-established technique in databases. In this context, two outstanding problems can be formulated. The first one consists in deciding whether a query can be answered exclusively using one or multiple materialized ... Keywords: XML, materialized views, xpath query evaluation
Xiaoying Wu; Dimitri Theodoratos; Wendy Hui Wang
A relational ranking query uses a scoring function to limit the results of a conventional query to a small number of the most relevant answers. The increasing popularity of this query paradigm has led to the introduction of specialized rank join operators ...
MIL primitives for querying a fragmented world
In query-intensive database application areas, like decision support and data mining, systems that use vertical fragmentation have a significant performance advantage. In order to support relational or object oriented applications on top of such a fragmented ... Keywords: Database systems, Main-memory techniques, Query languages, Query optimization, Vertical fragmentation
Peter A. Boncz; Martin L. Kersten
Efficiently approximating query optimizer plan diagrams
Given a parametrized n-dimensional SQL query template and a choice of query optimizer, a plan diagram is a color-coded pictorial enumeration of the execution plan choices of the optimizer over the query parameter space. These diagrams have proved to ...
Atreyee Dey; Sourjya Bhaumik; Harish D; Jayant R. Haritsa
Schemes of storing XML query cache
XML query caching for XML database-backed Web applications began to be investigated recently. However, the issue of how the cached query results are stored has not been addressed despite its practical significance. In this paper, we deal with ... Keywords: DOM, PDOM, XML query cache, XML update, incremental cache refresh
Hyunchul Kang; Seungchul Han; Younghyun Kim
Query weighting for ranking model adaptation
We propose to directly measure the importance of queries in the source domain to the target domain where no rank labels of documents are available, which is referred to as query weighting. Query weighting is a key step in ranking model adaptation. As ...
Peng Cai; Wei Gao; Aoying Zhou; Kam-Fai Wong
SENSTRAC: scalable querying of sensor networks from mobile platforms using tracking-style queries
Future applications running on mobile platforms will sometimes need to query sensors and track sensor data over time. This paper proposes a novel, but natural, solution to querying sensors from mobile platforms, based on the publish-subscribe paradigm. ... Keywords: MANET, SENSTRAC, ad hoc networks, mobile networks, publish-subscribe, query, querying sensors, scalability, sensor networks
Stefan Pleisch; Kenneth P. Birman
Computers aid drilling planning
This article reports that computers are rapidly becoming an indispensable tool for the drilling engineer both in town and at the wellsite. Two factors have contributed to the sudden increase in their use. The first is the need to cut drilling costs. Engineers have been forced to take a more critical look at plans and past experience. The second is the falling price (and increased portability) of hardware and software. Several major operators have demonstrated that careful planning of drilling operations based on local knowledge and data from offset wells can reduce the drilling learning curve substantially. Computers make it possible to retrieve and process offset well data rapidly and efficiently. They also offer powerful mathematical models which describe complicated aspects of drilling.
Burgess, T.
Advanced drilling systems
Drilling is ubiquitous in oil, gas, geothermal, minerals, water well, and mining industries. Drilling and well completion account for 25% to 50% of the cost of producing power from geothermal energy. Reduced drilling costs will reduce the cost of electricity produced from geothermal resources. Undoubtedly, there are concepts for advanced drilling systems that have yet to be studied. However, the breadth and depth of previous efforts in this area almost guarantee that any new efforts will at least initially build on an idea or a variation of an idea that has already been investigated. Therefore, a review of previous efforts, coupled with a characterization of viable advanced drilling systems and the current state of technology as it applies to those systems, provide the basis for this study.
Pierce, K.G.; Finger, J.T. [Sandia National Labs., Albuquerque, NM (United States); Livesay, B.J. [Livesay Consultants, San Diego, CA (United States)
Advanced drilling systems study.
This report documents the results of a study of advanced drilling concepts conducted jointly for the Natural Gas Technology Branch and the Geothermal Division of the U.S. Department of Energy. A number of alternative rock cutting concepts and drilling systems are examined. The systems cover the range from current technology, through ongoing efforts in drilling research, to highly speculative concepts. Cutting mechanisms that induce stress mechanically, hydraulically, and thermally are included. All functions necessary to drill and case a well are considered. Capital and operating costs are estimated and performance requirements, based on comparisons of the costs for alternative systems to conventional drilling technology, are developed. A number of problems common to several alternatives and to current technology are identified and discussed.
Pierce, Kenneth G.; Livesay, Billy Joe; Finger, John Travis (Livesay Consultants, Encintas, CA)
Quantum query complexity for qutrits
We compute lower bounds for the exact quantum query complexity of a ternary function f. The lower bound is of order O(log{sub 3}(n)). In case f is symmetric on a sphere then the lower bound is of order O({radical}(n)). This work is a natural continuation of the work of Beals, Buhrman, Cleve, Mosca, and de Wolf on lower limits for binary functions.
Tamir, Boaz [Department of HPS, Bar Ilan University, Ramat Gan (Israel)
Drill drive mechanism
A drill drive mechanism is especially adapted to provide both rotational drive and axial feed for a drill of substantial diameter such as may be used for drilling holes for roof bolts in mine shafts. The drill shaft is made with a helical pattern of scroll-like projections on its surface for removal of cuttings. The drill drive mechanism includes a plurality of sprockets carrying two chains of drive links which are arranged to interlock around the drill shaft with each drive link having depressions which mate with the scroll-like projections. As the chain links move upwardly or downwardly the surfaces of the depressions in the links mate with the scroll projections to move the shaft axially. Tangs on the drive links mate with notch surfaces between scroll projections to provide a means for rotating the shaft. Projections on the drive links mate together at the center to hold the drive links tightly around the drill shaft. The entire chain drive mechanism is rotated around the drill shaft axis by means of a hydraulic motor and gear drive to cause rotation of the drill shaft. This gear drive also connects with a differential gearset which is interconnected with a second gear. A second motor is connected to the spider shaft of the differential gearset to produce differential movement (speeds) at the output gears of the differential gearset. This differential in speed is utilized to drive said second gear at a speed different from the speed of said gear drive, this speed differential being utilized to drive said sprockets for axial movement of said drill shaft.
Dressel, Michael O. (Englewood, CO)
Example Queries | Open Energy Information
Example Queries Example Queries Jump to: navigation, search Example Queries SEP Funding SEP Funding Alabama 55,570,000 Alaska 28,232,000 Arizona 55,447,000 Arkansas 39,416,000 California 226,093,000 Colorado 49,222,000 Connecticut 38,542,000 Delaware 24,231,000 Florida 126,089,000 Georgia 82,495,000 Hawaii 25,930,000 Idaho 28,572,000 Illinois 101,321,000 Indiana 68,621,000 Iowa 40,546,000 Kansas 38,284,000 Kentucky 52,533,000 Louisiana 71,694,000 Maine 27,305,000 Maryland 51,772,000 Massachusetts 54,911,000 Michigan 82,035,000 Minnesota 54,172,000 Mississippi 40,418,000 Missouri 57,393,000 Montana 25,855,000 Nebraska 30,910,000 Nevada 34,714,000 New Hampshire 25,827,000 New Jersey 73,643,000 New Mexico 31,821,000 New York 123,110,000 North Carolina 75,989,000 North Dakota 24,585,000
Noble Drilling DRILLING, COMPLETION AND STIMULATION PROGRAM
Friendly Drilling Systems" Environmental issues are a significant part of every energy industry endeavor challenges facing the energy industry but also the considerable resources of the University and industry Petroleum and other industry sponsors from the Global Petroleum Research Institute (GPRI) to identify
Drilling Waste Management Information System
The Drilling Waste Management Information System is an online resource for technical and regulatory information on practices for managing drilling muds and cuttings, including...
Drilling Waste Management Technology Descriptions
skip navigation Drilling Waste Management Information System: The information resource for better management of drilling wastes DWM Logo Search Search you are in this section...
Queryl Queryl Detailees Name From To Proposed Start Date Proposed End Date Office of the Director of Alex, Aileen DOE/CFO National Intelligence 5/27/2007 5/27/2009 Federal Railroad Alexander, Alice Administration DOE/CFO 7/1/2007 1/1/2008 Arnaudo, Raymond Dept of State DOE/NNSA Moscow Office 3/5/2006 3/3/2008 Cambridge Energy Research Ashley, Peter DOE/PI Associates (CERA) 1/4/2009 3/27/2009 Executive Office of the Barringer, Jody DOE/EE President/OMB 11/16/2008 3/14/2009 Benigni, Deborah Dept of State DOE/IN 4/30/2007 4/30/2009 Federal Bureau of Borgia, Stanley Investigation DOE/IN 6/12/2006 6/12/2008 Federal Bureau of Borgia, Stanley Investigation DOE/IN 6/12/2008 6/12/2009 Department of State/US Brosnahan, Kevin DOE/EE Embassy of Paris 12/1/2007 5/1/2008 Office of the Director of
Structured Query Language for Virtual Observatory
Currently two query languages are defined as standards for the Virtual Observatory (VO). Astronomical Data Query Language (ADQL) is used for catalog data query and Simple Image Access Protocol (SIAP) is for image data query. As a result, when we query each data service, we need to know in advance which language is supported and then construct a query language accordingly. The construct of SIAP is simple, but they have a limited capability. For example, there is no way to specify multiple regions in one query, and it is difficult to specify complex query conditions. In this paper, we propose a unified query language for any kind of astronomical database on the basis of SQL99. SQL is a query language optimized for a table data, so to apply the SQL to the image and spectrum data set, the data structure need to be mapped to a table like structure. We present specification of this query language and an example of the architecture for the database system.
Yuji Shirasaki; Masatoshi Ohishi; Yoshihiko Mizumoto; Masahiro Tanaka; Satoshi Honda; Masafumi Oe; Naoki Yasuda; Yoshifumi Masunaga
Context-Sensitive Query Auto-Completion ?
Query auto completion is known to provide poor predictions of the user�s query when her input prefix is very short (e.g., one or two characters). In this paper we show that context, such as the user�s recent queries, can be used to improve the prediction quality considerably even for such short prefixes. We propose a context-sensitive query auto completion algorithm, NearestCompletion, which outputs the completions of the user�s input that are most similar to the context queries. To measure similarity, we represent queries and contexts as high-dimensional term-weighted vectors and resort to cosine similarity. The mapping from queries to vectors is done through a new query expansion technique that we introduce, which expands a query by traversing the query recommendation tree rooted at the query. In order to evaluate our approach, we performed extensive experimentation over the public AOL query log. We demonstrate that when the recent user�s queries are relevant to the current query she is typing, then after typing a single character, NearestCompletion�s MRR is 48 % higher relative to the MRR of the standard MostPopularCompletion algorithm on average. When the context is irrelevant, however, NearestCompletion�s MRR is essentially zero. To mitigate this problem, we propose HybridCompletion, which is a hybrid of NearestCompletion with MostPopularCompletion. HybridCompletion is shown to dominate both NearestCompletion and MostPopularCompletion, achieving a total improvement of 31.5 % in MRR relative to MostPopular-Completion on average.
Ziv Bar-yossef; Naama Kraus
Drilling Waste Management Fact Sheet: Drilling Practices That Minimize
Drilling Practices Drilling Practices Fact Sheet - Drilling Practices That Minimize Generation of Drilling Wastes How Are Wells Typically Drilled? The conventional process of drilling oil and gas wells uses a rotary drill bit that is lubricated by drilling fluids or muds. As the drill bit grinds downward through the rock layers, it generates large amounts of ground-up rock known as drill cuttings. This section of the Drilling Waste Management Information System website discusses several alternative drilling practices that result in a lower volume of waste being generated. Oil and gas wells are constructed with multiple layers of pipe known as casing. Traditional wells are not drilled from top to bottom at the same diameter but rather in a series of progressively smaller-diameter intervals. The top interval is drilled starting at the surface and has the largest diameter hole. Drill bits are available in many sizes to drill different diameter holes. The hole diameter can be 20" or larger for the uppermost sections of the well, followed by different combinations of progressively smaller diameters. Some of the common hole diameters are: 17.5", 14.75", 12.25", 8.5", 7.875", and 6.5".
Thermal spallation drilling
Thermal spallation drilling is an underdeveloped process with great potential for reducing the costs of drilling holes and mining shafts and tunnels in most very hard rocks. Industry has used this process to drill blast holes for emplacing explosives and to quarry granite. Some theoretical work has been performed, and many signs point to a great future for this process. The Los Alamos National Laboratory has studied the theory of the spallation process and is conducting experiments to prove out the system and to adapt it for use with a conventional rotary rig. This report describes work that has been accomplished at the Laboratory on the development of thermal spallation drilling and some work that is projected for the future on the system. 3 references, 3 figures.
Williams, R.E.
Drill pipe protector development
The Geothermal Drilling Organization (GDO), formed in the early 1980s by the geothermal industry and the U.S. Department of Energy (DOE) Geothermal Division, sponsors specific development projects to advance the technologies used in geothermal exploration, drilling, and production phases. Individual GDO member companies can choose to participate in specific projects that are most beneficial to their industry segment. Sandia National Laboratories is the technical interface and contracting office for the DOE in these projects. Typical projects sponsored in the past have included a high temperature borehole televiewer, drill bits, muds/polymers, rotary head seals, and this project for drill pipe protectors. This report documents the development work of Regal International for high temperature geothermal pipe protectors.
Thomerson, C.; Kenne, R. [Regal International Corp., Corsicanna, TX (United States); Wemple, R.P. [Sandia National Lab., Albuquerque, NM (United States)] [ed.] [and others
Subsurface drill string
A drill string comprises a first drill string member having a male end; and a second drill string member having a female end configured to be joined to the male end of the first drill string member, the male end having a threaded portion including generally square threads, the male end having a non-threaded extension portion coaxial with the threaded portion, and the male end further having a bearing surface, the female end having a female threaded portion having corresponding female threads, the female end having a non-threaded extension portion coaxial with the female threaded portion, and the female end having a bearing surface. Installation methods, including methods of installing instrumented probes are also provided.
Casper, William L. (Rigby, ID); Clark, Don T. (Idaho Falls, ID); Grover, Blair K. (Idaho Falls, ID); Mathewson, Rodney O. (Idaho Falls, ID); Seymour, Craig A. (Idaho Falls, ID)
Update on slimhole drilling
Sandia National Laboratories manages the US Department of Energy program for slimhole drilling. The principal objective of this program is to expand proven geothermal reserves through increased exploration made possible by lower-cost slimhole drilling. For this to be a valid exploration method, however, it is necessary to demonstrate that slimholes yield enough data to evaluate a geothermal reservoir, and that is the focus of Sandia`s current research.
Finger, J.T.
Improving query performance in virtual data warehouses
In order to improve the quality of Business Intelligence Systems in an organization we can choose to build the system using BI techniques such as OLAP and data warehousing or by using traditional reports based on SQL queries. The cost and developing ... Keywords: SQL query plans, analytical functions, business intelligence projects, data extraction, indexes, partitioning techniques, query optimization and performance, tuning and optimization, virtual data warehouse
Adela B�ra; Ion Lungu; Manole Velicanu; Vlad Diaconita; Iuliana Botha
Logical queries over views: Decidability and expressiveness
We study the problem of deciding the satisfiability of first-order logic queries over views, with our aim to delimit the boundary between the decidable and the undecidable fragments of this language. Views currently occupy a central place in database ... Keywords: L�wenheim class, Satisfiability, conjunctive query, containment, database query, database view, decidability, first-order logic, monadic logic, ontology reasoning, unary logic, unary view
James Bailey; Guozhu Dong; Anthony WIDJAJA To
Effective Structured Query Formulation for Session Search
... For instance, in TREC 2011 session 11 query �hawaii real estate average resale value house or condo news�, we discover that �hawaii real� and ...
Qunits: queried units in database search
Keyword search against structured databases has become a popular topic of investigation, since many users find structured queries too hard to express, and enjoy the freedom of a ``Google-like'' query box into which search terms can be entered. Attempts to address this problem face a fundamental dilemma. Database querying is based on the logic of predicate evaluation, with a precisely defined answer set for a given query. On the other hand, in an information retrieval approach, ranked query results have long been accepted as far superior to results based on boolean query evaluation. As a consequence, when keyword queries are attempted against databases, relatively ad-hoc ranking mechanisms are invented (if ranking is used at all), and there is little leverage from the large body of IR literature regarding how to rank query results. Our proposal is to create a clear separation between ranking and database querying. This divides the problem into two parts, and allows us to address these separately. The first tas...
Nandi, Arnab
Decision trees with AND, OR queries
We investigate decision trees in which one is allowed to query threshold functions of subsets of variables. We are mainly interested in the case where only queries of AND and OR are allowed. This model is a generalization of the classical decision tree ... Keywords: AND, OR queries, Boolean functions, CRCW PRAM machines, Ethernet channel, complexity, computational complexity, copy computation, decision theory, decision trees, depth-three circuits, determinism, direct sum problem, nondeterminism, parallel time, query threshold functions, random processes, randomization, required decision tree depth, size complexity, threshold-k function, tight lower bound, trees (mathematics), variable subsets
Y. Ben-Asher; I. Newman
Querying Allocations Using cbank | Argonne Leadership Computing...
apply to the resource (machine) to which a user is currently logged in. For example, a query on Surveyor about PROJECTNAME will return information about the Surveyor allocation...
Ontology query languages for the Semantic Web.
??Ontology languages and corresponding query languages play key roles for representing and processing information about the real world for the emerging Semantic Web. Efforts have� (more)
Zhang, Zhijun
Predicting Query Performance in Intranet Search
Macdonald,C. He,B. Ounis,I. In Proceedings of the ACM SIGIR'05 Query Prediction Workshop. August 19, 2005, Salvador, Brazil.
Macdonald, C.; He, B.; Ounis, I.
Query expansion techniques for question answering.
??Query expansion is a technique used to boost performance of a document retrieval engine, such as those commonly found in question answering (QA) systems. Common� (more)
Top-k typicality queries and efficient query answering methods on large databases
Finding typical instances is an effective approach to understand and analyze large data sets. In this paper, we apply the idea of typicality analysis from psychology and cognitive science to database query answering, and study the novel problem of answering ... Keywords: Efficient query answering, Top-k query, Typicality analysis
Ming Hua; Jian Pei; Ada W. Fu; Xuemin Lin; Ho-Fung Leung
Drilling technology/GDO
The Geothermal Technology Division of the US Department of Energy is sponsoring two programs related to drilling technology. The first is aimed at development of technology that will lead to reduced costs of drilling, completion, and logging of geothermal wells. This program has the official title ''Hard Rock Penetration Mechanics.'' The second program is intended to share with private industry the cost of development of technology that will result in solutions to the near term geothermal well problems. This program is referred to as the ''Geothermal Drilling Organization''. The Hard Rock Penetration Mechanics Program was funded at $2.65M in FY85 and the GDO was funded at $1.0M in FY85. This paper details the past year's activities and accomplishments and projects the plans for FY86 for these two programs.
Kelsey, J.R.
EIA Drilling Productivity Report
Drilling Productivity Report Drilling Productivity Report For Center on Global Energy Policy, Columbia University October 29, 2013 | New York, NY By Adam Sieminski, Administrator The U.S. has experienced a rapid increase in natural gas and oil production from shale and other tight resources Adam Sieminski, EIA Drilling Productivity Report October 29, 2013 2 0 5 10 15 20 25 30 35 2000 2002 2004 2006 2008 2010 2012 Rest of US Marcellus (PA and WV) Haynesville (LA and TX) Eagle Ford (TX) Bakken (ND) Woodford (OK) Fayetteville (AR) Barnett (TX) Antrim (MI, IN, and OH) 0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 2000 2002 2004 2006 2008 2010 2012 Eagle Ford (TX) Bakken (MT & ND) Granite Wash (OK & TX) Bonespring (TX Permian) Wolfcamp (TX Permian) Spraberry (TX Permian) Niobrara-Codell (CO) Woodford (OK)
Proper planning improves flow drilling
Underbalanced operations reduce formation damage, especially in horizontal wells where zones are exposed to mud for longer time periods. Benefits, risks, well control concerns, equipment and issues associated with these operations are addressed in this paper. Flow drilling raises many concerns, but little has been published on horizontal well control and flow drilling operations. This article covers planning considerations for flow drilling, but does not address horizontal ''overbalanced'' drilling because considerations and equipment are the same as in vertical overbalanced drilling and many references address that subject. The difference in well control between vertical and horizontal overbalanced drilling is fluid influx behavior and how that behavior affects kill operations.
Collins, G.J. (Marathon Oil Co., Houston, TX (United States))
Mechanical drill string jar
An improved mechanical drill string jar is described that allows uninhibited telescoping movement to the normal drilling condition. The drill string jar consists of: (a) an elongated, generally cylindrical, body usable as a drill string element; (b) axial motion resistance means situated in the annular opening; (c) bias means operatively associated with at least one element of the splined pair to rotate the pair out of alignment when the splined pair is rotationally disengaged; (d) opposed cooperating surfaces on at least two of the spline teeth situated such that forced axial relative motion of the splined pair will produce opposed radial forces on the teeth; (e) means intrinsic to at least one element of the splined pair to permit resisted radial displacement of the spline teeth when forced axial relative motion occurs, to permit one element to move axially through the other; (f) cam surfaces on at least one of the teeth situated to force rotational alignment of the splined pair when telescoping movement is from a jarring condition toward the normal drilling condition; (g) relative rotation resistance means situated in the annular opening, structurally engaged with the pair of telescoping members such that relative rotation therebetween will be resisted; (h) striker and anvil means situated in the annular opening, operatively associated with the telescoping pair of elements, such that axial relative movement therebetween will be solidly stopped at the axial extreme condition; (i) a flow-through fluid channel means extending between the means to attach to the continuing drill string; and (j) seal means situated in the annular opening, operatively associated with the telescoping pair of members, to provide fluid tightness therebetween.
Buck, D.A.
Observing SQL queries in their natural habitat
We describe Habitat, a declarative observational debugger for SQL. Habitat facilitates true language-level (not: plan-level) debugging of, probably flawed, SQL queries that yield unexpected results. Users mark SQL subexpressions ... Keywords: Declarative debugging, SQL, query languages, relational databases
Torsten Grust; Jan Rittinger
Processing top k queries from samples
Top-k queries are desired aggregation operations on data sets. Examples of queries on network data include the top 100 source AS's, top 100 ports, or top Domain names over IP packets or over IP flow records. Since the complete dataset is often ...
Edith Cohen; Nadav Grossaug; Haim Kaplan
Ranking class labels using query sessions
The role of search queries, as available within query sessions or in isolation from one another, in examined in the context of ranking the class labels (e.g., brazilian cities, business centers, hilly sites) extracted from Web documents for various ...
Marius Pa?ca
Queries as anchors: selection by association
This paper introduces a new method for linking the world view of the search engine user community with that of the search engine itself. This new method is based on collecting and aggregating associative query trails in the form of query reformulation ... Keywords: document expansion, index enhancement, reformulation analysis
Einat Amitay; Adam Darlow; David Konopnicki; Uri Weiss
Query-Answering CG Knowledge Bases
Conceptual graphs are a good choice for constructing and exploiting a knowledge base. In several of our projects (semantic portal for e-tourism, exploitation of digital object corpus, etc.), we have to query such bases. So it is natural to consider queries ...
Michel Lecl�re; Nicolas Moreau
Critique of Drilling Research
For a number of years the Department of Energy has been funding research to reduce the cost of drilling geothermal wells. Generally that research has been effective and helped to make geothermal energy economically attractive to developers. With the increased competition for the electrical market, geothermal energy needs every advantage it can acquire to allow it to continue as a viable force in the marketplace. In drilling related research, there is essentially continuous dialogue between industry and the national laboratories. Therefore, the projects presented in the Program Review are focused on subjects that were previously recommended or approved by industry.
Hamblin, Jerry
Deepwater drilling riser system
The principal focus of this paper is to discuss and summarize, from the manufacturer's perspective, the primary milestones in the development of the marine riser system used to drill in record water depths off the U.S. east coast. This riser system is unique in that it used advanced designs, material technology, and quality control to enable safe operation in water depths beyond the capability of conventional drilling riser systems. Experience and research have led to design improvements that are now being incorporated in new riser systems that have the potential of expanding the frontiers to increasingly deeper water.
Chastain, T.; Stone, D.
Learning about the world through long-term query logs
In this article, we demonstrate the value of long-term query logs. Most work on query logs to date considers only short-term (within-session) query information. In contrast, we show that long-term query logs can be used to learn about the world we live ... Keywords: data mining, knowledge discovery, query logs, user behavior
Matthew Richardson
Optimized query routing trees for wireless sensor networks
In order to process continuous queries over Wireless Sensor Networks (WSNs), sensors are typically organized in a Query Routing Tree (denoted as T) that provides each sensor with a path over which query results can be transmitted to the querying node. ... Keywords: Critical path method, Query routing trees, Sensor networks
Panayiotis Andreou; Demetrios Zeinalipour-Yazti; Andreas Pamboris; Panos K. Chrysanthis; George Samaras
Building an Efficient Preference XML Query Processor
Today user-centered information acquisition over collections of complex XML documents is increasingly in demand. To this end, preferences have become an important paradigm enabling users to express individual interests and delivering personalized information. As the structure of XML documents plays a major part in retrieval, users often have specific preferences about the structure. For evaluation a query has to be unfolded into an entire set of queries filling the structure with more or less preferred values. Since such structure expansions typically contain redundancies, it is important to identify and simplify necessary expansion queries for effective evaluation. To address these issues, we developed a preference query optimizer that not only determines an optimal set of expansion queries, but also preserves the specific ordering induced by the user preferences with respect to Pareto optimality.
Sungran Cho; Wolf-tilo Balke
Query Selectivity Estimation for Uncertain Data
Abstract. Applications requiring the handling of uncertain data have led to the development of database management systems extending the scope of relational databases to include uncertain (probabilistic) data as a native data type. New automatic query optimizations having the ability to estimate the cost of execution of a given query plan, as available in existing databases, need to be developed. For probabilistic data this involves providing selectivity estimations that can handle multiple values for each attribute and also new query types with threshold values. This paper presents novel selectivity estimation functions for uncertain data and shows how these functions can be integrated into PostgreSQL to achieve query optimization for probabilistic queries over uncertain data. The proposed methods are able to handle both attribute- and tuple-uncertainty. Our experimental results show that our algorithms are efficient and give good selectivity estimates with low space-time overhead. 1
Sarvjeet Singh; Chris Mayfield; Rahul Shah; Sunil Prabhakar; Susanne Hambrusch
Combination drilling and skiving tool
A combination drilling and skiving tool including a longitudinally extending hollow skiving sleeve slidably and concentrically mounted on a right-handed twist drill. Dogs or pawls provided on the internal periphery of the skiving sleeve engage with the helical grooves of the drill. During a clockwise rotation of the tool, the drill moves downwardly and the sleeve translates upwardly, so that the drill performs a drilling operation on a workpiece. On the other hand, the drill moves upwardly and the sleeve translates downwardly, when the tool is rotated in a counter-clockwise direction, and the sleeve performs a skiving operation. The drilling and skiving operations are separate, independent and exclusive of each other.
Stone, William J. (Kansas City, MO)
Foam drilling simulator
Although the use of compressible drilling fluids is experiencing growth, the flow behavior and stability properties of drilling foams are more complicated than those of conventional fluids. In contrast with conventional mud, the physical properties of foam change along the wellbore. Foam physical and thermal properties are strongly affected by pressure and temperature. Many problems associated with field applications still exist, and a precise characterization of the rheological properties of these complex systems needs to be performed. The accurate determination of the foam properties in circulating wells helps to achieve better estimation of foam rheology and pressure. A computer code is developed to process the data and closely simulate the pressure during drilling a well. The model also offers a detailed discussion of many aspects of foam drilling operations and enables the user to generate many comparative graphs and tables. The effects of some important parameters such as: back-pressure, rate of penetration, cuttings concentration, cuttings size, and formation water influx on pressure, injection rate, and velocity are presented in tabular and graphical form. A discretized heat transfer model is formulated with an energy balance on a control volume in the flowing fluid. The finite difference model (FDM) is used to write the governing heat transfer equations in discretized form. A detailed discussion on the determination of heat transfer coefficients and the solution approach is presented. Additional research is required to analyze the foam heat transfer coefficient and thermal conductivity.
Paknejad, Amir Saman
Natural Gas EIA-176 Query System Readme(1999)
176 Query System Readme 1.0 INTRODUCTION TO THE EIA-176 FRONT END QUERY FACILITY This system provides a method of extracting and using the EIA-176 data, and saving the query...
A Belief Model of Query Difficulty That Uses Subjective Logic
The difficulty of a user query can affect the performance of Information Retrieval (IR) systems. This work presents a formal model for quantifying and reasoning about query difficulty as follows: Query difficulty is considered to be a subjective belief, ...
Christina Lioma; Roi Blanco; Raquel Mochales Palau; Marie-Francine Moens
Experimental quantum private queries with linear optics
The quantum private query is a quantum cryptographic protocol to recover information from a database, preserving both user and data privacy: the user can test whether someone has retained information on which query was asked and the database provider can test the amount of information released. Here we discuss a variant of the quantum private query algorithm that admits a simple linear optical implementation: it employs the photon's momentum (or time slot) as address qubits and its polarization as bus qubit. A proof-of-principle experimental realization is implemented.
De Martini, Francesco [Dipartimento di Fisica, dell'Universita 'La Sapienza', Roma 00185 (Italy); Accademia Nazionale dei Lincei, via della Lungara 10, Roma 00165 (Italy); Giovannetti, Vittorio [NEST-CNR-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy); Lloyd, Seth [MIT, RLE, and Department of Mechanical Engineering, MIT 3-160, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 (United States); Maccone, Lorenzo [Institute for Scientific Interchange, 10133 Torino (Italy); QUIT, Dip. Fisica A. Volta, 27100 Pavia (Italy); Nagali, Eleonora; Sansoni, Linda; Sciarrino, Fabio [Dipartimento di Fisica, dell'Universita 'La Sapienza', Roma 00185 (Italy)
T-703: Cisco Unified Communications Manager Open Query Interface...
703: Cisco Unified Communications Manager Open Query Interface Lets Remote Users Obtain Database Contents T-703: Cisco Unified Communications Manager Open Query Interface Lets...
Exploration Drilling | Open Energy Information
Exploration Drilling Exploration Drilling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Exploration Drilling Details Activities (0) Areas (0) Regions (0) NEPA(15) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Exploration Drilling Parent Exploration Technique: Drilling Techniques Information Provided by Technique Lithology: Identify lithology and mineralization, provide core samples and rock cuttings Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults Hydrological: -Water samples can be used for geochemical analysis -Fluid pressures can be used to estimate flow rates Thermal: -Temperatures can be measured within the hole
Development Drilling | Open Energy Information
Page Page Edit with form History Facebook icon Twitter icon » Development Drilling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Development Drilling Details Activities (1) Areas (1) Regions (0) NEPA(9) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Development Drilling Parent Exploration Technique: Drilling Techniques Information Provided by Technique Lithology: Identify lithology and mineralization, provide core samples and rock cuttings Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults Hydrological: -Water samples can be used for geochemical analysis -Fluid pressures can be used to estimate flow rates
Cost effectiveness of sonic drilling
Sonic drilling (combination of mechanical vibrations and rotary power) is an innovative environmental technology being developed in cooperation with DOE`s Arid-Site Volatile Organic Compounds Integrated Demonstration at Hanford and the Mixed Waste Landfill Integrated Demonstration at Sandia. This report studies the cost effectiveness of sonic drilling compared with cable-tool and mud rotary drilling. Benefit of sonic drilling is its ability to drill in all types of formations without introducing a circulating medium, thus producing little secondary waste at hazardous sites. Progress has been made in addressing the early problems of failures and downtime.
Masten, D.; Booth, S.R.
Horizontal drilling method and apparatus
This patent describes an apparatus for drilling a highly deviated well into a petroleum formation the apparatus comprising a drill pipe extending from a surface location to a down-hole drilling assembly through a curved wellbore. It comprises a down-hole motor attached to a bit at a first end, the down-hole motor having a bent housing; a bent sub in the down-hole drilling assembly located above the motor; and a pony collar located between the motor and the bent sub, the pony collar having sufficient mass to substantially hold the motor against a wellbore wall during drilling operations.
Rehm, W.A.; Trunk, T.D.; Baseflug, T.D.; Cromwell, S.L.; Hickman, G.A.; Nickel, R.D.; Lyons, M.S.
Ordering the attributes of query results
There has been a great deal of interest in the past few years on ranking of results of queries on structured databases, including work on probabilistic information retrieval, rank aggregation, and algorithms for merging of ordered lists. In many applications, ...
Gautam Das; Vagelis Hristidis; Nishant Kapoor; S. Sudarshan
Probabilistic ranking of database query results
We investigate the problem of ranking answers to a database query when many tuples are returned. We adapt and apply principles of probabilistic models from Information Retrieval for structured data. Our proposed solution is domain independent. It leverages ...
Surajit Chaudhuri; Gautam Das; Vagelis Hristidis; Gerhard Weikum
Querying Incomplete Data over Extended ER Schemata
Since Chen's Entity-Relationship (ER) model, conceptual modeling has been playing a fundamental role in relational data design. In this paper we consider an extended ER (EER) model enriched with cardinality constraints, disjointness assertions, and is-a relations among both entities and relationships. In this setting, we consider the case of incomplete data, which is likely to occur, for instance, when data from different sources are integrated. In such a context, we address the problem of providing correct answers to conjunctive queries by reasoning on the schema. Based on previous results about decidability of the problem, we provide a query answering algorithm that performs rewriting of the initial query into a recursive Datalog query encoding the information about the schema. We finally show extensions to more general settings.
Cali, Andrea
Table Name query? | OpenEI Community
Table Name query? Home > Groups > Databus Is there an API feature which returns the names of tables? Submitted by Hopcroft on 28 October, 2013 - 15:37 1 answer Points: 0 if you are...
Indexing a dictionary for subset matching queries
We consider a subset matching variant of the Dictionary Query problem. Consider a dictionary D of n strings, where each string location contains a set of characters drawn from some alphabet ?={1,...,|?|}. Our goal is to ...
Gad M. Landau; Dekel Tsur; Oren Weimann
We consider a subset matching variant of the Dictionary Query problem. Consider a dictionary D of n strings, where each string location contains a set of characters drawn from some alphabet ?. Our goal is to preprocess D so ...
Enabling ?-approximate querying in sensor networks
Data approximation is a popular means to support energy-efficient query processing in sensor networks. Conventional data approximation methods require users to specify fixed error bounds a prior to address the trade-off between result accuracy ...
Liu Yu; Jianzhong Li; Hong Gao; Xiaolin Fang
The DEDALE system for complex spatial queries
This paper presents DEDALE, a spatial database system intended to overcome some limitations of current systems by providing an abstract and non-specialized data model and query language for the representation and manipulation of spatial objects. DEDALE ...
St�phane Grumbach; Philippe Rigaux; Luc Segoufin
Implementing Graph Pattern Queries on a Relational Database
When a graph database is implemented on top of a relational database, queries in the graph query language are translated into relational SQL queries. Graph pattern queries are an important feature of a graph query language. Translating graph pattern queries into single SQL statements results in very poor query performance. By taking into account the pattern query structure and generating multiple SQL statements, pattern query performance can be dramatically improved. The performance problems encountered with the single SQL statements generated for pattern queries reflects a problem in the SQL query planner and optimizer. Addressing this problem would allow relational databases to better support semantic graph databases. Relational database systems that provide good support for graph databases may also be more flexible platforms for data warehouses.
Kaplan, I L; Abdulla, G M; Brugger, S T; Kohn, S R
Drill bit assembly for releasably retaining a drill bit cutter
A drill bit assembly is provided for releasably retaining a polycrystalline diamond compact drill bit cutter. Two adjacent cavities formed in a drill bit body house, respectively, the disc-shaped drill bit cutter and a wedge-shaped cutter lock element with a removable fastener. The cutter lock element engages one flat surface of the cutter to retain the cutter in its cavity. The drill bit assembly thus enables the cutter to be locked against axial and/or rotational movement while still providing for easy removal of a worn or damaged cutter. The ability to adjust and replace cutters in the field reduces the effect of wear, helps maintains performance and improves drilling efficiency.
Glowka, David A. (Austin, TX); Raymond, David W. (Edgewood, NM)
Feasibility of Supercritical Carbon Dioxide as a Drilling Fluid for Deep Underbalanced Drilling Operations.
??Feasibility of drilling with supercritical carbon dioxide to serve the needs of deep underbalanced drilling operations has been analyzed. A case study involving underbalanced drilling� (more)
Gupta, Anamika
Pad drilling and rig mobility lead to more efficient drilling ...
Biofuels: Ethanol & Biodiesel ... Pad drilling allows producers to target a significant area of underground resources while minimizing impact on the surface.
Query clustering using content words and user feedback
Query clustering is crucial for automatically discovering frequently asked queries (FAQs) or most popular topics on a question-answering search engine. Due to the short length of queries, the traditional approaches based on keywords are not suitable ... Keywords: log mining, query clustering, user feedback, web search
Ji-Rong Wen; Jian-Yun Nie; Hong-Jiang Zhang
On applying temporal database concepts to event queries
Temporal databases and query languages have been a subject of research for more than 30 years and are a natural fit for expressing queries that involve a temporal dimension. This paper makes an argument for an event query language that incorporates temporal ... Keywords: event processing, temporal databases, temporal queries
Foruhar Ali Shiva; Susan D. Urban
Semantic errors in SQL queries: a quite complete list
We investigate classes of SQL queries which are syntactically correct, but certainly not intended, no matter for which task the query was written. For instance, queries that are contradictory, i.e. always return the empty set, are obviously not intended. ... Keywords: SQL, SQL exams, bugs, database courses, databases, errors, logical errors, queries, semantic errors, software correctness, static analysis, teaching
Stefan Brass; Christian Goldberg
Querying Source Code with Natural Language Markus Kimmig
a developer enters a code search query, we first compute its grammatical form. Then, we search the training) corre- sponds to the query form. In other terms, we search the training data for queries that match enters the query "Where is method init() called" the tool might choose method for the "search for
Paris-Sud XI, Université de
Monitoring the dynamic web to respond to continuous queries
Continuous queries are queries for which responses given to users must be continuously updated, as the sources of interest get updated. Such queries occur, for instance, during on-line decision making, e.g., traffic flow control, weather monitoring, ... Keywords: allocation policies, continuous queries
Sandeep Pandey; Krithi Ramamritham; Soumen Chakrabarti
Drilling and general petroleum engineering
Forty-nine papers are included in the Drilling and General Petroleum Engineering Volume of the SPE Annual Conference and Exhibition proceedings. The conference was held in New Orleans, Louisiana, September 25-28, 1994. The papers cover such topics as: extended reach well drilling, development of marginal satellite fields, slim hole drilling, pressure loss predictions, models for cuttings transport, ester-based drilling fluid systems, borehole stability, cementing, operations, bit failures, roller core bits, well tracking techniques, nitrogen drilling systems, plug failures, drill bit and drillstring dynamics, slim hole vibrations, reserve estimates, enhanced recovery methods, waste disposal, and engineering salary trends. A separate abstract and indexing was prepared for each paper for inclusion in the Energy Science and Technology Database.
High speed drilling research advances
This article reports that the Amoco Production Company's Tulsa Research Center is developing a High Speed Drilling System (HSDS) to improve drilling economics for both exploration and development wells. The system is targeted for areas where historically the drilling rate is less than 25 ft/hr over a large section of hole. Designed as a five-year development program, work began on the system in late 1984. A major service company is participating in the project. The objective of the HSDS project is to improve drilling efficiency by developing improvements in the basic mechanical drilling system. The HSDS approach to improved drilling economics is via the traditional routes of increasing penetration rate (ROP) and bit life, increasing hole stability and reducing trouble time.
Warren, T.M.; Canson, B.E.
Apparatus in a drill string
An apparatus in a drill string comprises an internally upset drill pipe. The drill pipe comprises a first end, a second end, and an elongate tube intermediate the first and second ends. The elongate tube and the ends comprising a continuous an inside surface with a plurality of diameters. A conformable spirally welded metal tube is disposed within the drill pipe intermediate the ends thereof and terminating adjacent to the ends of the drill pipe. The conformable metal tube substantially conforms to the continuous inside surface of the metal tube. The metal tube may comprise a non-uniform section which is expanded to conform to the inside surface of the drill pipe. The non-uniform section may comprise protrusions selected from the group consisting of convolutions, corrugations, flutes, and dimples. The non-uniform section extends generally longitudinally along the length of the tube.
Hall, David R. (Provo, UT); Dahlgren, Scott (Alpine, UT); Hall, Jr., Tracy H. (Provo, UT); Fox, Joe (Lehi, UT); Pixton, David S. (Provo, UT)
An interactive visual query interface on spatial/ temporal data
Abstract: In this paper a visual approach for the query interface on the spatial/temporal data is described, which is designed for the users who know nothing about query languages. Based on concept of elementary query and query operators, a complex spatial/temporal query could be built as a compound query which is broken down into several interactive iterations. In each of iterations, users just need to build a simple elementary query and select a query operator, which greatly reduces the mental load of users. To make query building more efficient, a novel approach based on the query pattern retrieving and matching is explained and used in the interface. An experimental prototype has been implemented to demonstrate the usability of the interface.
Xin Li; S. K. Chang
Drill string gas data
Data and supporting documentation were compiled and analyzed for 26 cases of gas grab samples taken during waste-tank core sampling activities between September 1, 1995 and December 31, 1997. These cases were tested against specific criteria to reduce uncertainties associated with in-tank sampling location and conditions. Of the 26 possible cases, 16 qualified as drill-string grab samples most likely to represent recently released waste gases. The data from these 16 ``confirmed`` cases were adjusted to remove non-waste gas contributions from core-sampling activities (argon or nitrogen purge), the atmospheric background, and laboratory sampler preparation (helium). The procedure for subtracting atmospheric, laboratory, and argon purge gases was unambiguous. No reliable method for determining the exact amount of nitrogen purge gas was established. Thus, the final set of ``Adjusted`` drill string gas data for the 6 nitrogen-purged cases had a greater degree of uncertainty than the final results for the 10 argon-purged cases. Including the appropriate amounts of uncertainty, this final set of data was added to the set of high-quality results from the Retained Gas Sampler (RGS), and good agreement was found for the N{sub 2}, H{sub 2}, and N{sub 2}O mole fractions sampled from common tanks. These results indicate that under favorable sampling conditions, Drill-String (DS) grab samples can provide reasonably accurate information about the dominant species of released gas. One conclusion from this set of total gas data is that the distribution of the H{sub 2} mole fractions is bimodal in shape, with an upper bound of 78%.
Siciliano, E.R.
An innovative drilling system
The principal project objectives were the following: To demonstrate the capability of the Ultrashort Radius Radial System to drill and complete multiple horizontal radials in a heavy oil formation which had a production history of thermal operations. To study the effects that horizontal radials have on steam placement at specific elevations and on reducing gravity override. To demonstrate that horizontal radials could be utilized for cyclic production, i.e. for purposes of oil production as well as for steam injection. Each of these objectives was successfully achieved in the project. Early production results indicate that radials positively influenced cyclic performance. This report documents those results. 15 refs., 29 figs., 1 tab.
Nees, J.; Dickinson, E.; Dickinson, W.; Dykstra, H.
Managing pressure during underbalanced drilling.
?? AbstractUnderbalanced drilling has received more and more attention in recent years. The reason for that may be because many oil fields, especially on the� (more)
R�en, Jostein
Method for drilling directional wells
A method is described of locating a substantially horizontal bed of interest in a formation and maintaining a drill string therein during the drilling operation, said drill string including a measurement-while-drilling (MWD) electromagnetic propagation resistivity sensor, comprising the steps of: drilling a substantially vertical offset well in a formation having at least one selected substantially horizontal bed therein; measuring resistivity in the formation at the offset well to provide a first resistivity log as a function of depth; modeling the substantially horizontal bed to provide a modeled resistivity log indicative of the resistivity taken along the substantially horizontal bed, said modeling being based on said first resistivity log; drilling a directional well in said formation near said offset well, a portion of said directional well being disposed in said substantially horizontal bed; measuring resistivity in said directional well using the MWD electromagnetic propagation resistivity sensor to provide a second log of resistivity taken substantially horizontally; comparing said second log to said modeled log to determine the location of said directional well; and adjusting the directional drilling operation so as to maintain said drill string within said substantially horizontal bed during the drilling of said directional well in response to said comparing step.
Wu, Jianwu; Wisler, M.M.
Inferring Function Semantics to Optimize Queries
The goal of the COKO-KOLA project [10, 9] is to express rules of rule-based optimizers in a manner permitting verification with a theorem prover. In [10], we considered query transformations that were too general to be expressed with rewrite rules. In this paper, we consider the complementary issue of expressing query transformations that are too specifc for rewrite rules. Such transformations require rewrite rules to be supplemented with semantic conditions to guard rule firing. This work considers the expression of such transformations using conditional rewrite rules, and the expression of inference rules to guide the optimizer in deciding if semantic conditions hold. This work differs from existing work in semantic query optimization in that semantic transformations in our framework are verifiable with a theorem prover. Further, our use of inference rules to guide semantic reasoning makes our optimizer extensible in a manner that is complementary to the extensibility benefits of existing rule-based technology. 1
Mitch Cherniack; Stan Zdonik
Underbalanced drilling solves difficult drilling problems and enhances production
An alternate approach to drilling, completing and working over new and existing wells has dramatically improved the efficiency of these operations. This method is called underbalanced drilling (UBD). Improvements in both the equipment and technique during the past 5 years have made this process economical and necessary to solve many difficult drilling problems. Additionally, by reducing drilling or workover damage, dramatic improvements in oil and gas production rates and ultimate reserves are realized, resulting in extra profits for today`s operators. This article will detail the advantages of UBD and give specific examples of its applications, A series of related articles will follow, including: new UBD equipment, land and off-shore case histories, coiled tubing drilling, underbalanced workovers, software technology and subsea applications to examine the reality and future of this technology.
Cuthbertson, R.L.; Vozniak, J.
Electric drill-string telemetry
We design a numerical algorithm for simulation of low-frequency electric-signal transmission through a drill string. This is represented by a transmission line with varying geometrical and electromagnetic properties versus depth, depending on the characteristics ... Keywords: drill string, low frequency, simulation, transmission line, voltage
Jos� M. Carcione; Flavio Poletto
Drilling Methods | Open Energy Information
Drilling Methods Drilling Methods Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Drilling Methods Details Activities (0) Areas (0) Regions (0) NEPA(5) Exploration Technique Information Exploration Group: Exploration Sub Group: None Parent Exploration Technique: Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Drilling Methods: No definition has been provided for this term. Add a Definition References No exploration activities found. Document # Analysis Type Applicant Geothermal Area Lead Agency District Office Field Office Mineral Manager Surface Manager Development Phase(s) Techniques CA-170-02-15 EA Mammoth Pacific Long Valley Caldera Geothermal Area BLM BLM Central California District Office BLM Bishop Field Office BLM Geothermal/Exploration Drilling Methods
Hydraulic Pulse Drilling
REV DATE DESCRIPTION ORIGINATOR REVIEWED DATE REV DATE DESCRIPTION ORIGINATOR REVIEWED DATE 0 4/13/2004 Final Report Author: J. Kolle Hunter/Theimer 4/13/2004 Document No.: TR- 053 HydroPulse(tm) Drilling Final Report Prepared by J.J. Kolle April 2004 U.S. Department of Energy Cooperative Development Agreement No. DE-FC26-FT34367 Tempress Technologies, Inc. 18858 - 72 ND Ave S. Kent, WA 98032 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not
V.: GLOO: A Graphical Query Language for OWL Ontologies. OWLED
Abstract. The database usability experience has shown that visual query languages tend to be superior to textual languages in many aspects. By applying this principle in the context of ontologies, we present GLOO, a graphical query language for OWL-DL ontologies. GLOO maps diagrammatic queries to DL based query languages such as nRQL, which is offered by the OWL-DL reasoner Racer. GLOO hides the complexity of a DL query language from users and allows them to query OWL ontologies with less difficulty. 1
Amineh Fadhil; Volker Haarslev
Ambiguous queries: test collections need more sense
Although there are many papers examining ambiguity in Information Retrieval, this paper shows that there is a whole class of ambiguous word that past research has barely explored. It is shown that the class is more ambiguous than other word types and ... Keywords: ambiguous queries, diversity, test collections
Mark Sanderson
Query Answering with DBoxes is Hard
Data in description logic knowledge bases is stored in the form of an ABox. ABoxes are often confusing for developers coming from relational databases because an ABox, in contrast to a database instance, provides an incomplete specification. A recently ... Keywords: Description logics, conjunctive queries, hybrid logic, model theory
Enrico Franconi; Yazm�n Ang�lica Ib��ez-Garc�a; ?nan� Seylan
A logic based context query language
Context is a basic ingredient in pervasive computing. It refers to user's both external environment and internal status, implying user's information needs during the interaction between the user and computer systems. By context-awareness, a variety of ... Keywords: context, context query language, temporal description logic
Ling Feng; Junhui Deng; Zhanjiang Song; Wenwei Xue
Explicit Query Diversification for Geographical Information Retrieval
Explicit Query Diversification for Geographical Information Retrieval Davide Buscaldi1 and Paolo in the Geographical Information Retrieval task. This task represent an opportunity to take advantage of diversity not contain enough geographical data. 1 Introduction Diversity search is an Information Retrieval (IR
Stratified analysis of AOL query log
Characterizing user's intent and behaviour while using a retrieval information tool (e.g. a search engine) is a key question on web research, as it hold the keys to know how the users interact, what they are expecting and how we can provide them information ... Keywords: Query log analysis, User behaviour, User intent, User interactions, User profiling
David J. Brenes; Daniel Gayo-Avello
Query and update through XML views
XML has become a standard medium for data exchange, and XML views are frequently used as an interface to relational database and XML data. There have been a considerable number of studies on building and querying XML views, while updating related topics ...
Gao Cong
Ranking entities using web search query logs
Searching for entities is an emerging task in Information Retrieval for which the goal is finding well defined entities instead of documents matching the query terms. In this paper we propose a novel approach to Entity Retrieval by using Web search engine ...
Bodo Billerbeck; Gianluca Demartini; Claudiu S. Firan; Tereza Iofciu; Ralf Krestel
Answering relationship queries on the web
Finding relationships between entities on the Web, e.g., the connections between different places or the commonalities of people, is a novel and challenging problem. Existing Web search engines excel in keyword matching and document ranking, but they ... Keywords: relationship query, web search
Gang Luo; Chunqiang Tang; Ying-li Tian
Secure multidimensional range queries in sensor networks
Most future large-scale sensor networks are expected to follow a two-tier architecture which consists of resource-rich master nodes at the upper tier and resource-poor sensor nodes at the lower tier. Sensor nodes submit data to nearby master nodes which ... Keywords: multidimensional range query, security, sensor networks,
Rui Zhang; Jing Shi; Yanchao Zhang
using a section of drill-in casing connected to a free-fall reentry cone. This hole was drilled to 95
Establishing nuclear facility drill programs
The purpose of DOE Handbook, Establishing Nuclear Facility Drill Programs, is to provide DOE contractor organizations with guidance for development or modification of drill programs that both train on and evaluate facility training and procedures dealing with a variety of abnormal and emergency operating situations likely to occur at a facility. The handbook focuses on conducting drills as part of a training and qualification program (typically within a single facility), and is not intended to included responses of personnel beyond the site boundary, e.g. Local or State Emergency Management, Law Enforcement, etc. Each facility is expected to develop its own facility specific scenarios, and should not limit them to equipment failures but should include personnel injuries and other likely events. A well-developed and consistently administered drill program can effectively provide training and evaluation of facility operating personnel in controlling abnormal and emergency operating situations. To ensure the drills are meeting their intended purpose they should have evaluation criteria for evaluating the knowledge and skills of the facility operating personnel. Training and evaluation of staff skills and knowledge such as component and system interrelationship, reasoning and judgment, team interactions, and communications can be accomplished with drills. The appendices to this Handbook contain both models and additional guidance for establishing drill programs at the Department`s nuclear facilities.
Drainhole drilling projects under way
This paper reports that many operators are taking advantage of continued developments in drainhole drilling technology to increase productivity in certain fields. Previously untapped prospects are under renewed scrutiny to determine if drainhole and horizontal drilling can make them more attractive. Producing properties are being reevaluated as well. Drainhole drilling typically involves reentering an existing well and cutting through the casing to drill a relatively short length of horizontal wellbore. Although separating drainhole and horizonal or extended-reach drilling is somewhat of a gray area, one difference is that a drainhole well turns to the horizontal much quicker. The radius of turn to 90/sup 0/ can be as little as 30 to 50 ft. Additionally, the length of horizontal kick in a drainhole well is typically in the 300- to 500-ft range compared to 1000 ft or more in extended-reach drilling. A final separating characteristic is that drainhole drilling can be associated with several horizontal lengths of wellbore coming off a single vertical hole.
Burton, B.
Acoustical properties of drill strings
The recovery of petrochemical and geothermal resources requires extensive drilling of wells to increasingly greater depths. Real-time collection and telemetry of data about the drilling process while it occurs thousands of feet below the surface is an effective way of improving the efficiency of drilling operations. Unfortunately, due to hostile down-hole environments, telemetry of this data is an extremely difficult problem. Currently, commercial systems transmit data to the surface by producing pressure pulses within the portion of the drilling mud enclosed in the hollow steel drill string. Transmission rates are between two and four data bits per second. Any system capable of raising data rates without increasing the complexity of the drilling process will have significant economic impact. One alternative system is based upon acoustical carrier waves generated within the drill string itself. If developed, this method would accommodate data rates up to 100 bits per second. Unfortunately, the drill string is a periodic structure of pipe and threaded tool joints, the transmission characteristics are very complex and exhibit a banded and dispersive structure. Over the past forty years, attempts to field systems based upon this transmission method have resulted in little success. This paper examines this acoustical transmission problem in great detail. The basic principles of acoustic wave propagation in the periodic structure of the drill string are examined through theory, laboratory experiment, and field test. The results indicate the existence of frequency bands which are virtually free of attenuation and suitable for data transmission at high bit rates. 9 refs., 38 figs., 2 tabs.
Drumheller, D.S.
Drilling Waste Management Fact Sheet: Slurry Injection of Drilling Wastes
Slurry Injection Slurry Injection Fact Sheet - Slurry Injection of Drilling Wastes Underground Injection of Drilling Wastes Several different approaches are used for injecting drilling wastes into underground formations for permanent disposal. Salt caverns are described in a separate fact sheet. This fact sheet focuses on slurry injection technology, which involves grinding or processing solids into small particles, mixing them with water or some other liquid to make a slurry, and injecting the slurry into an underground formation at pressures high enough to fracture the rock. The process referred to here as slurry injection has been given other designations by different authors, including slurry fracture injection (this descriptive term is copyrighted by a company that provides slurry injection services), fracture slurry injection, drilled cuttings injection, cuttings reinjection, and grind and inject.
Drilling Techniques | Open Energy Information
Page Page Edit with form History Facebook icon Twitter icon » Drilling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Drilling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(20) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Identify lithology and mineralization, provide core samples and rock cuttings Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults Hydrological: -Water samples can be used for geochemical analysis -Fluid pressures can be used to estimate flow rates
Underbalanced drilling in remedial operations
Operators are finding additional applications for underbalanced drilling (UBD) technology that deliver benefits besides faster, more trouble-free drilling and improved well productivity. Underbalanced workovers, completions and re-drills are being performed with impressive results. This article will describe some of the jobs and applications, and detail the special surface equipment being used to make this a success. This is the fifth in a series of articles on UBD technology and its rapid development in this field. The paper discusses deep gas wells in the Texas Panhandle, gas and condensate wells near Mobile, Alabama, and the Austin Chalk wells in Texas and Louisiana.
On-the-fly progress detection in iterative stream queries
Multiple researchers have proposed cyclic query plans for evaluating iterative queries over streams or rapidly changing input. The Declarative Networking community uses cyclic plans to evaluate Datalog programs that track reachability and other graph ...
Badrish Chandramouli; Jonathan Goldstein; David Maier
EIA 176 Query System, 2002 - U.S. Energy Information ...
EIA 176 Query System 2002 Release date: February 2, 2004 Next release date: February 2005. The EIA-176 Query system is a Windows-based system which runs under ...
The Effectiveness of Query Expansion for Distributed Information Retrieval
The Effectiveness of Query Expansion for Distributed Information Retrieval Paul Ogilvie, Jamie information retrieval where complete collection information is available. One might expect that query expansion would then work for distributed information retrieval when complete collection information
Callan, Jamie
Framework for querying distributed objects managed by a grid infrastructure
Queries over scientific data often imply expensive analyses of data requiring a lot of computational resources available in Grids. We are developing a customizable query processor built on top of an established Grid infrastructure, the NorduGrid middleware, ...
Ruslan Fomkin; Tore Risch
Template:Incentive Type Page Query | Open Energy Information
Incentive Type Page Query Jump to: navigation, search This is the 'Incentive Type Page Query' template. If limitrec is not included, default is 1000. limitrec is only for the...
Xplus: a SQL-tuning-aware query optimizer
The need to improve a suboptimal execution plan picked by the query optimizer for a repeatedly run SQL query arises routinely. Complex expressions, skewed or correlated data, and changing conditions can cause the optimizer to make mistakes. For example, ...
Herodotos Herodotou; Shivnath Babu
Query-based database policy assurance using semantic web technologies
In this thesis, we present a novel approach to database security which looks at queries instead of the database tables themselves. In doing so, we use a number of Semantic Web technologies to define rules, translate queries, ...
Soltren, Jos� Hiram
Selective Sampling Using the Query by Committee Algorithm
We analyze the �query by committee� algorithm, a method for filtering informative queries from a random stream of inputs. We show that if the two-member committee algorithm achieves information gain with positive lower bound, then the ... Keywords: Bayesian Learning, experimental design, query learning, selective sampling
Yoav Freund; H. Sebastian Seung; Eli Shamir; Naftali Tishby
Probabilistic information retrieval approach for ranking of database query results
We investigate the problem of ranking the answers to a database query when many tuples are returned. In particular, we present methodologies to tackle the problem for conjunctive and range queries, by adapting and applying principles of probabilistic ... Keywords: Probabilistic information retrieval, automatic ranking, experimentation, indexing, relational queries, user survey, workload
Analyzing, Detecting, and Exploiting Sentiment in Web Queries
The Web contains an increasing amount of biased and opinionated documents on politics, products, and polarizing events. In this article, we present an indepth analysis of Web search queries for controversial topics, focusing on query sentiment. To this ... Keywords: Opinionated queries, Web search, sentiment analysis
Sergiu Chelaru, Ismail Sengor Altingovde, Stefan Siersdorfer, Wolfgang Nejdl
Users, Queries and Documents: A Unified Representation for Web Mining
The collective feedback of the users of an Information Retrieval system has been proved to be useful in many tasks. A popular approach in the literature is to process the logs stored by Internet Service Providers (ISP), Intranet proxies or Web search ... Keywords: Web Logs, User Feedback, Query Clustering, Query Recommendations, Query Suggestions
Michelangelo Diligenti; Marco Gori; Marco Maggini
A Simple Model for Classifying Web Queries by User Intent
València, Spain 3 NLE Lab.- ELiRF, Universitat Politècnica de València, Spain 4 PRHLT, Universitat query classification, User intent, Query analysis 1 Introduction Web Search Engines (WSEs) are the most in an interaction with a Web Search Engine. Query Classification based on user intent is different from traditional
Rosso, Paolo
Data summaries for on-demand queries over linked data
Typical approaches for querying structured Web Data collect (crawl) and pre-process (index) large amounts of data in a central data repository before allowing for query answering. However, this time-consuming pre-processing phase however leverages the ... Keywords: index structures, linked data, rdf querying
Andreas Harth; Katja Hose; Marcel Karnstedt; Axel Polleres; Kai-Uwe Sattler; J�rgen Umbrich
Behavior-driven clustering of queries into topics
Categorization of web-search queries in semantically coherent topics is a crucial task to understand the interest trends of search engine users and, therefore, to provide more intelligent personalization services. Query clustering usually relies on lexical ... Keywords: mission, query log, topic, user intent, user profiling
Luca Maria Aiello; Debora Donato; Umut Ozertem; Filippo Menczer
Query Suggestions for Mobile Search: Understanding Usage Patterns
Inc 1600 Amphitheatre Parkway, Mountain View, CA firstname.lastname@example.com ABSTRACT Entering search terms that users who were asked to enter queries on a search interface with query suggestions rated their workload heavily on suggestions if they are provided. Users who were asked to enter queries on a search interface
Cortes, Corinna
Using histograms to estimate answer sizes for XML queries
Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimization. Even at the user level, predictions of the total result size can be valuable ... Keywords: XML, estimation, histogram, schema
Yuqing Wu; Jignesh M. Patel; H. V. Jagadish
Improving effectiveness of query expansion using information theoretic approach
Automatic Query expansion is a well-known method to improve the performance of information retrieval systems. In this paper we have suggested information theoretic measures to improve efficiency of co-occurrence based automatic query expansion. We have ... Keywords: automatic query expansion, candidate terms, kullback-leibler divergence, relevance feedback, term cooccurrence
Hazra Imran; Aditi Sharan
Infill drilling enhances waterflood recovery
Two sets of west Texas carbonate reservoir and waterflood data were studied to evaluate the impact of infill drilling on waterflood recovery. Results show that infill drilling enhanced the current and projected waterflood recovery from most of the reservoirs. The estimated ultimate and incremental infill-drilling waterflood recovery was correlated with well spacing and other reservoir and process parameters. Results of the correlation indicate that reducing well spacing from 40 to 20 acres (16 to 8 ha) per well would increase the oil recovery by 8 to 9% of the original oil in place (OOIP). Because of the limited data base and regressional nature of the correlation models, the infill-drilling recovery estimate must be used with caution.
Wu, C.H.; Jardon, M. (Texas A and M Univ., College Station, TX (USA)); Laughlin, B.A. (Union Pacific Research Co. (US))
Geothermal drill pipe corrosion test plan
Plans are presented for conducting a field test of drill pipe corrosion, comparing air and nitrogen as drilling fluids. This test will provide data for evaluating the potential of reducing geothermal well drilling costs by extending drill pipe life and reducing corrosion control costs. The 10-day test will take place during fall 1980 at the Baca Location in Sandoval County, New Mexico.
Caskey, B.C.; Copass, K.S.
for the Ocean Drilling Program Deutsche Forschungsgemeinschaft (Federal Republic of Germany) Institut Français
/Canada/Chinese Taipei/Korea Consortium for Ocean Drilling Deutsche Forschungsgemeinschaft (Federal Republic of Germany
PAO lubricant inhibits bit balling, speeds drilling
For drilling operations, a new polyalphaolefin (PAO) lubricant improves penetration rates by reducing bit balling tendencies in water-based mud. The additive also reduces drillstring drag. This enables the effective transmission of weight to the bit and thereby increases drilling efficiency in such applications as directional and horizontal drilling. The paper describes drilling advances, bit balling, laboratory testing, and test analysis.
Mensa-Wilmot, G. [GeoDiamond, Houston, TX (United States); Garrett, R.L. [Garrett Fluid Technology, The Woodlands, TX (United States); Stokes, R.S. [Coastal Superior Solutions Inc., Lafayette, LA (United States)
Natural Gas Annual Respondent Query System
loading new table loading new table Home > Natural Gas > Natural Gas Annual Respondent Query System Natural Gas Annual Respondent Query System (EIA-176 Data through 2012) Report: 176 Natural Gas Deliveries 176 Natural Gas Supply Items 176 Natural Gas Other Disposition Items 176 Type of Operations and Sector Items 176 Continuation Text Lines 176 Company List 191 Field Level Storage Data 757 Processing Capacity 176 Custom Report (User-defined) Years: 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 to 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 Sort by: Area, Company, Item Company, Area, Item Item, Area, Company Company: Show only Company ID Show only Company Name Show both Company ID, Name 2012 Total
Quantum query complexity of some graph problems
Quantum algorithms for graph problems are considered, both in the adjacency matrix model and in an adjacency list-like array model. We give almost tight lower and upper bounds for the bounded error quantum query complexity of Connectivity, Strong Connectivity, Minimum Spanning Tree, and Single Source Shortest Paths. For example we show that the query complexity of Minimum Spanning Tree is in Theta(n^{3/2}) in the matrix model and in Theta(sqrt{nm}) in the array model, while the complexity of Connectivity is also in Theta(n^{3/2}) in the matrix model, but in Theta(n) in the array model. The upper bounds utilize search procedures for finding minima of functions under various conditions.
Christoph Durr; Mark Heiligman; Peter Hoyer; Mehdi Mhalla
Variable Interactions in Query-Driven Visualization
One fundamental element of scientific inquiry is discoveringrelationships, particularly the interactions between different variablesin observed or simulated phenomena. Building upon our prior work in thefield of Query-Driven Visualization, where visual data analysisprocessing is focused on subsets of large data deemed to be"scientifically interesting," this new work focuses on a novel knowledgediscovery capability suitable for use with petascale class datasets. Itenables visual presentation of the presence or absence of relationships(correlations) between variables in data subsets produced by Query-Drivenmethodologies. This technique holds great potential for enablingknowledge discovery from large and complex datasets currently emergingfrom SciDAC and INCITE projects. It is sufficiently generally to beapplicable to any time of complex, time-varying, multivariate data fromstructured, unstructured or adaptive grids.
Bethel, E. Wes; Gosink, Luke J.; Anderson, John C.; Joy, Kenneth I.
Chemical damage due to drilling operations
The drilling of geothermal wells can result in near wellbore damage of both the injection wells and production wells if proper precautions are not taken. Very little specific information on the chemical causes for drilling damage that can directly be applied to the drilling of a geothermal well in a given situation is available in the literature. As part of the present work, the sparse literature references related to the chemical aspects of drilling damage are reviewed. The various sources of chemically induced drilling damages that are related to drilling operations are summarized. Various means of minimizing these chemical damages during and after the drilling of a geothermal well are suggested also.
Vetter, O.J.; Kandarpa, V.
Managed pressure drilling techniques and tools
The economics of drilling offshore wells is important as we drill more wells in deeper water. Drilling-related problems, including stuck pipe, lost circulation, and excessive mud cost, show the need for better drilling technology. If we can solve these problems, the economics of drilling the wells will improve, thus enabling the industry to drill wells that were previously uneconomical. Managed pressure drilling (MPD) is a new technology that enables a driller to more precisely control annular pressures in the wellbore to prevent these drillingrelated problems. This paper traces the history of MPD, showing how different techniques can reduce drilling problems. MPD improves the economics of drilling wells by reducing drilling problems. Further economic studies are necessary to determine exactly how much cost savings MPD can provide in certain situation. Furter research is also necessary on the various MPD techniques to increase their effectiveness.
Martin, Matthew Daniel
Rotary steerable motor system for underground drilling
A preferred embodiment of a system for rotating and guiding a drill bit in an underground bore includes a drilling motor and a drive shaft coupled to drilling motor so that drill bit can be rotated by the drilling motor. The system further includes a guidance module having an actuating arm movable between an extended position wherein the actuating arm can contact a surface of the bore and thereby exert a force on the housing of the guidance module, and a retracted position.
Turner, William E. (Durham, CT); Perry, Carl A. (Middletown, CT); Wassell, Mark E. (Kingwood, TX); Barbely, Jason R. (Middletown, CT); Burgess, Daniel E. (Middletown, CT); Cobern, Martin E. (Cheshire, CT)
An Improved Query for the Hidden Subgroup Problem
An equal superposition query with |0> in the response register is used in the "standard method" of single-query algorithms for the hidden subgroup problem (HSP). Here we introduce a different query, the character query, generalizing the well-known phase kickback trick. This query maximizes the success probability of subgroup identification under a uniform prior, for the HSP in which the oracle functions take values in a finite abelian group. We then apply our results to the case when the subgroups are drawn from a set of conjugate subgroups and obtain a success probability greater than that found by Moore and Russell.
Asif Shakeel
Automatic discovery of query-classdependent models for multimodal search
We develop a framework for the automatic discovery of query classes for query-class-dependent search models in multimodal retrieval. The framework automatically discovers useful query classes by clustering queries in a training set according to the performance of various unimodal search methods, yielding classes of queries which have similar fusion strategies for the combination of unimodal components for multimodal search. We further combine these performance features with the semantic features of the queries during clustering in order to make discovered classes meaningful. The inclusion of the semantic space also makes it possible to choose the correct class for new, unseen queries, which have unknown performance space features. We evaluate the system against the TRECVID 2004 automatic video search task and find that the automatically discovered query classes give an improvement of 18% in MAP over hand-defined query classes used in previous works. We also find that some hand-defined query classes, such as �Named Person � and �Sports � do, indeed, have similarities in search method performance and are useful for query-class-dependent multimodal search, while other hand-defined classes, such as �Named Object� and �General Object� do not have consistent search method performance and should be split apart or replaced with other classes. The proposed framework is general and can be applied to any new domain without expert domain knowledge.
Lyndon S. Kennedy; Apostol (Paul) Natsev; Shih-fu Chang
Downhole Temperature Prediction for Drilling Geothermal Wells
Unusually high temperatures are encountered during drilling of a geothermal well. These temperatures affect every aspect of drilling, from drilling fluid properties to cement formulations. Clearly, good estimates of downhole temperatures during drilling would be helpful in preparing geothermal well completion designs, well drilling plans, drilling fluid requirements, and cement formulations. The thermal simulations in this report were conducted using GEOTEMP, a computer code developed under Sandia National Laboratories contract and available through Sandia. Input variables such as drilling fluid inlet temperatures and circulation rates, rates of penetration, and shut-in intervals were obtained from the Imperial Valley East Mesa Field and the Los Alamos Hot Dry Rock Project. The results of several thermal simulations are presented, with discussion of their impact on drilling fluids, cements, casing design, and drilling practices.
Mitchell, R. F.
Newberry Exploratory Slimhole: Drilling And Testing
During July-November, 1995, Sandia National Laboratories, in cooperation with CE Exploration, drilled a 5360' exploratory slimhole (3.895" diameter) in the Newberry Known Geothermal Resource Area (KGRA) near Bend, Oregon. This well was part of Sandia's program to evaluate slimholes as a geothermal exploration tool. During and after drilling we performed numerous temperature logs, and at the completion of drilling attempted to perform injection tests. In addition to these measurements, the well's data set includes: over 4000' of continuous core (with detailed log); daily drilling reports from Sandia and from drilling contractor personnel; daily drilling fluid record; and comparative data from other wells drilled in the Newberry KGRA. This report contains: (1) a narrative account of the drilling and testing, (2) a description of equipment used, (3) a brief geologic description of the formation drilled, (4) a summary and preliminary interpretation of the data, and (5) recommendations for ...
John Finger Ronald; Ronald D. Jacobson; Charles E. Hickox
Smaller Footprint Drilling System for
Oil & Natural Gas Technology Oil & Natural Gas Technology DOE Award No.: DE-FC26-03NT15401 Final Report Smaller Footprint Drilling System for Deep and Hard Rock Environments; Feasibility of Ultra-High-Speed Diamond Drilling Submitted by: TerraTek, A Schlumberger Company 1935 Fremont Drive Salt Lake City, UT 84104 Prepared for: United States Department of Energy National Energy Technology Laboratory 2 February 2010 Office of Fossil Energy Feasibility of Ultra-High Speed Diamond Drilling DE-FC26-03NT15401 ii DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or
RECIPIENT:Potter Drilling Inc
Potter Drilling Inc Potter Drilling Inc u.s. DEPARTUEN T OF ENERG¥ EERE PROJECT MANAGEMENT CENT ER NEPA DEIERl\IINATION PROJECr TITLE: Development of a Hydrothermal Spallation Drilling System for EGS Page 1 0[2 STATE: CA Funding Opportunity Announ<:ement Number Procurement Instrument Number NEPA Control Number CID Number OE·PS36-09G099016 OE· EE0002746 ~FO . 10 - [r,,~ G02746 Based on my review of the information concerning the proposed action, as NEPA ComplianC:f Offkrr (authorized under DOE Order 451.IA), I have made the following determination: ex. EA, EIS APPENDIX AND NUMBER: Description: A9 Information gathering (including, but not limited 10, literature surveys, inventories, audits), data analysis (including computer modeling), document preparation (such as conceptual design or feasibility studies, analytical energy supply
Near-Term Developments in Geothermal Drilling
The DOE Hard Rock Penetration program is developing technology to reduce the costs of drilling geothermal wells. Current projects include: R & D in lost circulation control, high temperature instrumentation, underground imaging with a borehole radar insulated drill pipe development for high temperature formations, and new technology for data transmission through drill pipe that can potentially greatly improve data rates for measurement while drilling systems. In addition to this work, projects of the Geothermal Drilling Organization are managed. During 1988, GDO projects include developments in five areas: high temperature acoustic televiewer, pneumatic turbine, urethane foam for lost circulation control, geothermal drill pipe protectors, an improved rotary head seals.
Dunn, James C.
Assembly for directional drilling of boreholes
This patent describes a drilling assembly for directional drilling of boreholes in subsurface formations. The assembly comprising a downhole drilling motor. The motor having an output shaft which is suitable to drive a rotary drill bit and a motor housing which is suitable to be arranged at the lower end of a drill string; stabilizing means for stabilizing the assembly; means in the assembly for permanently tilting the central axis of the output shaft with respect to the longitudinal axis of the drill string in the borehole. It is characterized in that the stabilizing means include a lower-most stabilizer which is secured to and rotates with the output shaft.
Steiginga, A.; Worrall, R.N.
Multicolor Maps from Compound Queries | OpenEI Community
Multicolor Maps from Compound Queries Multicolor Maps from Compound Queries Home > Groups > OpenEI Community Central Jweers's picture Submitted by Jweers(83) Contributor 16 May, 2013 - 14:22 ask queries compound queries developer Google maps maps multicolor result formats results Semantic Mediawiki Hi all, Recently, a couple of people on OpenEI have asked me how to do compound (or multicolor) maps like this one: Thanks to the new Google Maps v3 API, this is really easy. I put together a quick sample of how this is done, complete with code snippits, here: http://en.openei.org/wiki/User:Jweers/Test5. First, create a compound query, then atttribute a custom marker icon to each query using the ;param=value syntax. The new OpenEI maps extension will take care of the rest. Here is an example of it in use on OpenEI by NREL's Geothermal team:
Intentional query suggestion: making user goals more explicit during search
student.tugraz.at The degree to which users � make their search intent explicit can be assumed to represent an upper bound on the level of service that search engines can provide. In a departure from traditional query expansion mechanisms, we introduce Intentional Query Suggestion as a novel idea that is attempting to make users � intent more explicit during search. In this paper, we present a prototypical algorithm for Intentional Query Suggestion and we discuss corresponding data from comparative experiments with traditional query suggestion mechanisms. Our preliminary results indicate that intentional query suggestions 1) diversify search result sets (i.e. it reduces result set overlap) and 2) have the potential to yield higher click-through rates than traditional query suggestions.
Markus Strohmaier; Mark Kr�ll; Christian K�rner
Definition: Drilling Techniques | Open Energy Information
Techniques Techniques Jump to: navigation, search Dictionary.png Drilling Techniques There are a variety of drilling techniques which can be used to sink a borehole into the ground. Each has its advantages and disadvantages, in terms of the depth to which it can drill, the type of sample returned, the costs involved and penetration rates achieved. There are two basic types of drills: drills which produce rock chips, and drills which produce core samples.[1] View on Wikipedia Wikipedia Definition Well drilling is the process of drilling a hole in the ground for the extraction of a natural resource such as ground water, brine, natural gas, or petroleum, for the injection of a fluid from surface to a subsurface reservoir or for subsurface formations evaluation or monitoring.
Acoustic data transmission through a drill string
Acoustical signals are transmitted through a drill string by canceling upward moving acoustical noise and by preconditioning the data in recognition of the comb filter impedance characteristics of the drill string. 5 figs.
Underbalanced drilling: Praises and perils
Underbalanced drilling (UBD) has been used with increasing frequency to minimize problems associated with invasive formation damage, which often greatly reduce the productivity of oil and gas reservoirs, particularly in openhole horizontal well applications. UBD, when properly designed and executed, minimizes or eliminates problems associated with the invasion of particulate matter into the formation as well as a multitude of other problems such as adverse clay reactions, phase trapping, precipitation, and emulsification, which can be caused by the invasion of incompatible mud filtrates in an overbalanced condition. In many UBD operations, additional benefits are seen because of a reduction in drilling time, greater rates of penetration, increased bit life, a rapid indication of productive reservoir zones, and the potential for dynamic flow testing while drilling. Potential downsides and damage mechanisms associated with UBD will be discussed. These include the following: (1) Increased cost and safety concerns; (2) Difficulty in maintaining a continuously underbalanced condition; (3) Spontaneous inhibition and countercurrent inhibition effects; (4) Glazing, mashing, and mechanically induced wellbore damage; (5) Macroporosity gravity-induced invasion; (6) Difficulty of application in zones of extreme pressure and permeability; and (7) Political/career risk associated with championing a new and potentially risky technology. The authors discuss reservoir parameters required to design an effective underbalanced or overbalanced drilling program, laboratory screening procedures to ascertain the effectiveness of UBD in a specific application and review the types of reservoirs that often present good applications for UBD technology.
Bennion, D.B.; Thomas, F.B.; Bietz, R.F.; Bennion, D.W. [Hycal Energy Research Labs., Ltd., Calgary, Alberta (Canada)
Well descriptions for geothermal drilling
Generic well models have been constructed for eight major geothermal resource areas. The models define representative times and costs associated with the individual operations that can be expected during drilling and completion of geothermal wells. They were made for and have been used to evaluate the impacts of potential new technologies. Their nature, their construction, and their validation are discussed.
Carson, C.C.; Livesay, B.J.
Use of Query Concepts and Information Extraction to Improve ...
Page 1. Use of Query Concepts and Information Extraction to Improve Information Retrieval Effectiveness David O. Holmes M. Catherine McCabe ...
Scheduling for in-network sensor query processing.
??xi, 135 leaves : ill. ; 30 cm HKUST Call Number: Thesis CSED 2008 Wu In-network query processing for sensor networks is a cross-layer paradigm,� (more)
Wu, Hejun
??Due to the increasing pervasiveness of data sets using the XML data format,numerous query languages have been proposed that exploit the structure inherent in XML.� (more)
Potturi, Venkatakalyan
Form EIA-176 Query System - Energy Information Administration
Form EIA-176 Query System . User�s guide . Version 7.0 . Energy Information Administration U.S. Department of Energy ...
Runway Incursion Database (RWS) - Data Query Tool | Data.gov
Runway Incursion Database (RWS) - Data Query Tool Safety DataTools Apps Challenges Resources Blogs Let's Talk Safety You are here Data.gov Communities Safety Data Runway...
Implementation of the Clinical Research Query Interface VISAGE.
??An innovative new query interface called VISAGE (VISual AGgregator and Explorer) has been developed for use in the PhysioMIMI system. This interface consists of three� (more)
Sandberg, Neil L.
Template:CompanyCsvPostOffsetQuery | Open Energy Information
template. It should be called in the following format: CompanyCsvPostOffsetQuery |cat |offset |limit |searchlabel Retrieved from "http:en.openei.orgw...
The EIA-176 Query System is a PC-based system for users to produce reports and ... The View EIA-176 Company Menu lets you control this display.
Form EIA-176 Query System Getting Started Guide Version 7.0 Energy Information Administration U.S. Department of Energy October ...
by the following agencies: Australia/Canada/Chinese Taipei/Korea Consortium for the Ocean Drilling Program Deutsche
Downhole drilling network using burst modulation techniques
A downhole drilling system is disclosed in one aspect of the present invention as including a drill string and a transmission line integrated into the drill string. Multiple network nodes are installed at selected intervals along the drill string and are adapted to communicate with one another through the transmission line. In order to efficiently allocate the available bandwidth, the network nodes are configured to use any of numerous burst modulation techniques to transmit data.
Hall; David R. (Provo, UT), Fox; Joe (Spanish Fork, UT)
Graphene Compositions And Drilling Fluids Derived Therefrom ...
Drilling fluids comprising graphenes and nanoplatelet additives and methods for production thereof are disclosed. Graphene includes graphite oxide, graphene oxide ...
Microhole Drilling Tractor Technology Development
In an effort to increase the U.S. energy reserves and lower costs for finding and retrieving oil, the USDOE created a solicitation to encourage industry to focus on means to operate in small diameter well-Microhole. Partially in response to this solicitation and because Western Well Tool's (WWT) corporate objective to develop small diameter coiled tubing drilling tractor, WWT responded to and was awarded a contract to design, prototype, shop test, and field demonstrate a Microhole Drilling Tractor (MDT). The benefit to the oil industry and the US consumer from the project is that with the MDT's ability to facilitate Coiled Tubing drilled wells to be 1000-3000 feet longer horizontally, US brown fields can be more efficiently exploited resulting in fewer wells, less environmental impact, greater and faster oil recovery, and lower drilling costs. Shortly after award of the contract, WWT was approached by a major oil company that strongly indicated that the specified size of a tractor of 3.0 inches diameter was inappropriate and that immediate applications for a 3.38-inch diameter tractor would substantially increase the usefulness of the tool to the oil industry. Based on this along with an understanding with the oil company to use the tractor in multiple field applications, WWT applied for and was granted a no-cost change-of-scope contract amendment to design, manufacture, assemble, shop test and field demonstrate a prototype a 3.38 inch diameter MDT. Utilizing existing WWT tractor technology and conforming to an industry developed specification for the tool, the Microhole Drilling Tractor was designed. Specific features of the MDT that increase it usefulness are: (1) Operation on differential pressure of the drilling fluid, (2) On-Off Capability, (3) Patented unique gripping elements (4) High strength and flexibility, (5) Compatibility to existing Coiled Tubing drilling equipment and operations. The ability to power the MDT with drilling fluid results in a highly efficient tool that both delivers high level of force for the pressure available and inherently increases downhole reliability because parts are less subject to contamination. The On-Off feature is essential to drilling to allow the Driller to turn off the tractor and pull back while circulating in cleanout runs that keep the hole clean of drilling debris. The gripping elements have wide contact surfaces to the formation to allow high loads without damage to the formation. As part of the development materials evaluations were conducted to verify compatibility with anticipated drilling and well bore fluids. Experiments demonstrated that the materials of the tractor are essentially undamaged by exposure to typical drilling fluids used for horizontal coiled tubing drilling. The design for the MDT was completed, qualified vendors identified, parts procured, received, inspected, and a prototype was assembled. As part of the assembly process, WWT prepared Manufacturing instructions (MI) that detail the assembly process and identify quality assurance inspection points. Subsequent to assembly, functional tests were performed. Functional tests consisted of placing the MDT on jack stands, connecting a high pressure source to the tractor, and verifying On-Off functions, walking motion, and operation over a range of pressures. Next, the Shop Demonstration Test was performed. An existing WWT test fixture was modified to accommodate operation of the 3.38 inch diameter MDT. The fixture simulated the tension applied to a tractor while walking (pulling) inside 4.0 inch diameter pipe. The MDT demonstrated: (1) On-off function, (2) Pulling forces proportional to available differential pressure up to 4000 lbs, (3) Walking speeds to 1100 ft/hour. A field Demonstration of the MDT was arranged with a major oil company operating in Alaska. A demonstration well with a Measured Depth of approximately 15,000 ft was selected; however because of problems with the well drilling was stopped before the planned MDT usage. Alternatively, functional and operational tests were run with the MDT insi
Western Well Tool
Directional drilling and equipment for hot granite wells
The following drilling equipment and experience gained in drilling to date are discussed: positive displacement motors, turbodrills, motor performance experience, rotary-build and rotary-hold results, steering devices and surveying tools, shock absorbers, drilling and fishing jars, drilling bits, control of drill string drag, and control of drill string degradation. (MHR)
Williams, R.E.; Neudecker, J.W.; Rowley, J.C.; Brittenham, T.L.
High-temperature directional drilling turbodrill
The development of a high-temperature turbodrill for directional drilling of geothermal wells in hard formations is summarized. The turbodrill may be used for straight-hole drilling but was especially designed for directional drilling. The turbodrill was tested on a dynamometer stand, evaluated in laboratory drilling into ambient temperature granite blocks, and used in the field to directionally drill a 12-1/4-in.-diam geothermal well in hot 200/sup 0/C (400/sup 0/F) granite at depths to 10,5000 ft.
Neudecker, J.W.; Rowley, J.C.
Downhole mud properties complicate drilling hydraulics
This paper explains that wellsite parameters such as penetration rate, hole cleaning, hole erosion and overall wellbore stability are directly related to the hydraulic conditions occurring while drilling. Drilling hydraulics, in turn, are largely a function of the drilling mud's properties, primarily viscosity and density. Accurate pressure loss calculations are necessary to maximize bit horse-power and penetration rates. Also, annular pressure loss measurements are important to record equivalent circulating densities, particularly when drilling near balanced formation pressures or when approaching formation fracture pressures. Determination of the laminar, transitional or turbulent flow regimes will help ensure the mud will remove drill cuttings from the wellbore and minimize hole erosion.
Leyendecker, E.A.; Bruton, J.R.
Characterizing statistical query learning: simplified notions and proofs
The Statistical Query model was introduced in [6] to handle noise in the well-known PAC model. In this model the learner gains information about the target concept by asking for various statistics about it. Characterizing the number of queries required ...
Bal�zs Sz�r�nyi
The linguistic structure of English web-search queries
Web-search queries are known to be short, but little else is known about their structure. In this paper we investigate the applicability of part-of-speech tagging to typical English-language web search-engine queries and the potential value of these ...
Cory Barr; Rosie Jones; Moira Regelson
Enhancing query translation with relevance feedback in translingual information retrieval
As an effective technique for improving retrieval effectiveness, relevance feedback (RF) has been widely studied in both monolingual and translingual information retrieval (TLIR). The studies of RF in TLIR have been focused on query expansion (QE), in ... Keywords: Query expansion, Relevance feedback, Translation enhancement, Translingual information retrieval
Daqing He; Dan Wu
Selectivity Estimation for Spatio-Temporal Queries to Moving Objects
firstname.lastname@example.com email@example.com Divisionof ComputerScience Department of Electrical of selection queries: one for historical positions of moving objects and the other for future positions the selection query efficiently, an accu- rate estimation of the selectivity is required. The selectivity
Chung, Chin-Wan
Characterizing the usability of interactive applications through query log analysis
People routinely rely on Internet search engines to support their use of interactive systems: they issue queries to learn how to accomplish tasks, troubleshoot problems, and otherwise educate themselves on products. Given this common behavior, we argue ... Keywords: query log analysis, usability
Adam Fourney; Richard Mann; Michael Terry
A natural language query interface to structured information
Accessing structured data such as that encoded in ontologies and knowledge bases can be done using either syntactically complex formal query languages like SPARQL or complicated form interfaces that require expensive customisation to each particular ... Keywords: conceptual search, querying, searching, user interfaces
Valentin Tablan; Danica Damljanovic; Kalina Bontcheva
Efficient top-k processing over query-dependent functions
We study the efficient evaluation of top-k queries over data items, where the score of each item is dynamically computed by applying an item-specific function whose parameter value is specified in the query. For example, online retail stores rank items ...
Lin Guo; Sihem Amer Yahia; Raghu Ramakrishnan; Jayavel Shanmugasundaram; Utkarsh Srivastava; Erik Vee
Agent-Based Spatial Query Optimization in a Grid Environment
Resource management and optimization among autonomous spatial databases in a grid environment is always a challenge task. In this paper, we introduce a BDI Agent model for cooperating complex spatial query optimization task in a grid environment. Spatial ... Keywords: BDI Agent, grid, spatial query optimization
Yufei Bai; Xiujun Ma; Kunqing Xie; Cuo Cai; Ke Li
Scalable distributed indexing and query processing over Linked Data
Linked Data is becoming the core part of modern Web applications and thus efficient access to structured information expressed in RDF gains paramount importance. A number of efficient local RDF stores exist already, while distributed indexing and distributed ... Keywords: Decentralized data management, Distributed indexing, Distributed storage, Linked Data, Query processing, Structured queries
Marcel Karnstedt; Kai-Uwe Sattler; Manfred Hauswirth
Selectivity Estimation of Window Queries for Line Segment Datasets
{499, Washington, DC, 1993. 11] J. Orenstein. Spatial query processing in an object- oriented database system- ples of Database Systems,pages 214{221, Washington, DC, 1993. 13] G. Proietti and C. FaloutsosSelectivity Estimation of Window Queries for Line Segment Datasets Guido Proietti Dept. of Computer
Faloutsos, Christos
Innovative techniques cut costs in wetlands drilling
This paper reports on an approach to drilling oil and gas wells in sensitive wetlands areas contributed to a savings of over $1.2 million on a three-well, $3 million drilling project in south Louisiana. ARCO Oil and Gas Co. drilled a three-well project in the Bayou Sale field with a truck-mounted workover rig and a modified solids-control system. This smaller equipment eliminated the need to build a large location in the marsh. Traditional drilling techniques require a large drillsite to accommodate all the equipment of a modern drilling complex. However, recently imposed environmental regulations substantially limit, and in some cases prohibit, the use of these conventional techniques for drilling wells in wetlands areas. Based on the potentially huge economic and operational impact on the drilling industry because of these stricter regulations, alternatives to these traditional practices are essential.
Navarro, A.R. (ARCO Oil and Gas Co., Lafayette, LA (US))
Underbalanced drilling with air offers many pluses
A pressure overbalance during conventional drilling can cause significant fluid filtrate invasion and lost circulation. Fluid invasion into the formation can lead to formation damage, high mud costs, a need for expensive completions, and well productivity impairment. Because underbalanced drilling creates a natural tendency for fluid and gas to flow from the formation to the borehole, successful underbalanced drilling depends upon the appropriate selection of circulating fluid. The use of a compressible fluid in the circulating system, referred to as air drilling, lowers the downhole pressure, allowing drilling into and beyond these sensitive formations. The paper discusses the equipment needed; well control; downhole air requirements; air drilling techniques using dry air, air-mist, stable foam, stiff foam, and aerated-fluid; downhole fires; directional air drilling; and well completions.
Shale, L. [Baker Hughes Inteq, Houston, TX (United States)
Conformable apparatus in a drill string
An apparatus in a drill string comprises an internally upset drill pipe. The drill pipe comprises a first end, a second end, and an elongate tube intermediate the first and second ends. The elongate tube and the ends comprising a continuous an inside surface with a plurality of diameters. A conformable metal tube is disposed within the drill pipe intermediate the ends thereof and terminating adjacent to the ends of the drill pipe. The conformable metal tube substantially conforms to the continuous inside surface of the metal tube. The metal tube may comprise a non-uniform section which is expanded to conform to the inside surface of the drill pipe. The non-uniform section may comprise protrusions selected from the group consisting of convolutions, corrugations, flutes, and dimples. The non-uniform section extends generally longitudinally along the length of the tube. The metal tube may be adapted to stretch as the drill pipes stretch.
Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Fox, Joe (Spanish Fork, UT)
Chemical Speciation of Chromium in Drilling Muds
Drilling muds are made of bentonite and other clays, and/or polymers, mixed with water to the desired viscosity. Without the drilling muds, corporations could not drill for oil and gas and we would have hardly any of the fuels and lubricants considered essential for modern industrial civilization. There are hundreds of drilling muds used and some kinds of drilling muds contain chromium. The chemical states of chromium in muds have been studied carefully due to concerns about the environmental influence. However it is difficult to determine the chemical state of chromium in drilling muds directly by conventional analytical methods. We have studied the chemical form of chromium in drilling muds by using a laboratory XAFS system and a synchrotron facility.
Taguchi, Takeyoshi [X-ray Research Laboratory, RIGAKU Corporation, 3-9-12 Matsubara-cho, Akishima-shi, Tokyo 196-8666 (Japan); Yoshii, Mitsuru [Mud Technical Center, Telnite Co., Ltd., 1-2-14 Ohama, Sakata-shi, Yamagata 998-0064 (Japan); Shinoda, Kohzo [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai-shi, Miyagi 980-8577 (Japan)
Hourly analysis of a very large topically categorized web query log
We review a query log of hundreds of millions of queries that constitute the total query traffic for an entire week of a general-purpose commercial web search service. Previously, query logs have been studied from a single, cumulative view. In contrast, ... Keywords: query log analysis, web search
Steven M. Beitzel; Eric C. Jensen; Abdur Chowdhury; David Grossman; Ophir Frieder
Learning to suggest: a machine learning framework for ranking query suggestions
We consider the task of suggesting related queries to users after they issue their initial query to a web search engine. We propose a machine learning approach to learn the probability that a user may find a follow-up query both useful and relevant, ... Keywords: machine learning, query log mining, query suggestion, search assistance
Umut Ozertem; Olivier Chapelle; Pinar Donmez; Emre Velipasaoglu
Say What? Why users choose to speak their web queries Maryam Kamvar, Doug Beeferman
a higher probability of being typed than shorter queries. Index Terms: speech, voice, search, Google, query of voice web search (where the query is entered by speaking rather than by keyboard) is sparse, most likely and time in entering their query. Thus, in terms of query entry difficulty, we would expect the benefit
Pregibon, Daryl
Continuous K-Nearest Neighbor Query for Moving Objects with Uncertain Velocity
One of the most important queries in spatio-temporal databases that aim at managing moving objects efficiently is the continuous K-nearest neighbor (CKNN) query. A CKNN query is to retrieve the K-nearest neighbors (KNNs) ... Keywords: K-nearest neighbors, continuous K-nearest neighbor query, moving objects, moving query object, spatio-temporal databases
Yuan-Ko Huang; Chao-Chun Chen; Chiang Lee
Office of Legacy Management (LM)
'Xxy";^ ...... ' '. .- -- Metals, Ceramics, and Materials. : . - ,.. ; - . _ : , , ' z . , -, .- . >. ; . .. :- : DRILLING URANIUM BILLETS ON A .-... r .. .. i ' LEBLOND-CARLSTEDT RAPID BORER 4 r . _.i'- ' ...... ' -'".. :-'' ,' :... : , '.- ' ;BY R.' J. ' ANSEN .AEC RESEARCH AND DEVELOPMENT REPORT PERSONAL PROPERTY OF J. F. Schlltz .:- DECLASSIFIED - PER AUTHORITY OF (DAlE) (NhTI L (DATE)UE) FEED MATERIALS PRODUCTION CENTER NATIONAL LFE A COMPANY OF OHIO 26 1 3967 3035406 NLCO - 886 Metals, Ceramics and Materials (TID-4500, 22nd Ed.) DRILLING URANIUM BILLETS ON A LEBLOND-CARLSTEDT RAPID BORER By R. J. Jansen* TECHNICAL DIVISION NATIONAL LEAD COMPANY OF OHIO Date of Issuance: September 13, 1963 Approved By: Approved By: Technical Director Head, Metallurgical Department *Mr. Jansen is presently
Filter for a drill string
A filter for a drill string comprises a perforated receptacle having an open end and a perforated end and first and second mounting surfaces are adjacent the open end. A transmission element is disposed within each of the first and second mounting surfaces. A capacitor may modify electrical characteristics of an LC circuit that comprises the transmission elements. The respective transmission elements are in communication with each other and with a transmission network integrated into the drill string. The transmission elements may be inductive couplers, direct electrical contacts, or optical couplers. In some embodiments of the present invention, the filter comprises an electronic component. The electronic component may be selected from the group consisting of a sensor, a router, a power source, a clock source, a repeater, and an amplifier.
Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Briscoe, Michael (Lehi, UT); McPherson, James (Sandy, UT)
176 Query System Readme 176 Query System Readme 1.0 INTRODUCTION TO THE EIA-176 FRONT END QUERY FACILITY This system provides a method of extracting and using the EIA-176 data, and saving the query results in various mediums and formats. There are pre-set data extractions available, which allow the user to select and run the most often-used queries. 1.1 Hardware Requirements The minimum hardware requirements are: - An IBM-compatible personal computer (PC) 386SX 16 MHZ with 2 megabytes RAM. (A 486DX 33MHZ with 4 megabytes RAM is recommended). - MS-DOS operating system (version 3.x or greater), or compatible, or Network operating system capable of emulating MS-DOS. - MS-DOS file handles should be set to at least 50 in the CONFIG.SYS. In Windows NT, this file is called CONFIG.NT.
Increasing ask query limit | OpenEI Community
Increasing ask query limit Increasing ask query limit Home > Groups > Utility Rate Rmckeel's picture Submitted by Rmckeel(297) Contributor 22 June, 2012 - 09:30 developer utility rate An NREL user who is trying to use the utility rate service was having an issue. He writes "I noticed that any rates past 10,000 are not accessible via json. For example, this query only returns two entries: http://en.openei.org/services/rest/utility_rates?version=latest&format=json_plain&offset=9998&limit=30&detail=basic". Twong mentioned "It looks like there's a default total max limit of 10000 results retrieved, even for special query pages in SemanticMediawiki. $smwgQMaxLimit Maximal number of results ever retrieved, even when using special query pages. Default: 10000"
Inferring query performance using pre-retrieval predictors
Abstract. The prediction of query performance is an interesting and important issue in Information Retrieval (IR). Current predictors involve the use of relevance scores, which are time-consuming to compute. Therefore, current predictors are not very suitable for practical applications. In this paper, we study a set of predictors of query performance, which can be generated prior to the retrieval process. The linear and non-parametric correlations of the predictors with query performance are thoroughly assessed on the TREC disk4 and disk5 (minus CR) collections. According to the results, some of the proposed predictors have significant correlation with query performance, showing that these predictors can be useful to infer query performance in practical applications. 1
Ben He; Iadh Ounis
VisTool: a Visual Tool for Querying Relational Databases
In this paper we describe VisTool, a prototype tool for querying relational databases by means of the visual query language VISIONARY. INTRODUCTION VISIONARY [1] is based on an iconic-diagrammatic paradigm used for both data and query representation. The external data model is called vision and is made up of the visual primitives of concept and association; the external query model is based on the definition of a dynamic and adaptive perspective for accessing data. The internal data model is relational, and the internal query model is SQL. The mapping between the visual and the relational worlds is established through an intermediate graph-based level. VISIONARY is mainly directed to naive and occasional users, who have no experience with data models and only have a general idea about the contents of the database; for this reason, the expressive power of VISIONARY is limited...
Francesca Benzi; Dario Maio; Stefano Rizzi
Indonesian drilling maintains steady pace
Offshore drilling activity in Indonesia increased nominally the first quarter of 1985 to an average 29 rigs. Barring any further problems with oil prices and markets, operators are expected to maintain essentially the current general level of appraisal/development work for the rest of this year. There are still a number of prospective regions to be explored in Southeast Asia. Regional developments are described for the South China Sea area, the Java Sea, South Sumatra, Kalimantan, Irian Jaya and the Malacca Strait.
Web Service Composition Through Declarative Queries: The Case of Conjunctive Queries with Union and Negation
A web service operation can be seen as a function op: X1,...,Xn ? Y1,...,Ym having an input message (request) with n arguments (parts), and an output message (response) with m parts [4, Section 2.2]. For example, opB: Author ?{(ISBN, Title)} may implement a books search service, returning for a given author A a list of books authored by A. We propose to model such operations as relations with access pattern, here: B oio (ISBN, Author, Title), where �oio � indicates that a value for the second attribute must be given as input, while the other attribute values can be retrieved as output. In this way, a family of web service operations over k attributes can be concisely described as a relation R(A1,...,Ak) with an associated set of access patterns P?{i, o} k. Since we model web services as relations with access patterns, we can now use queries as a declarative specifications for web service composition: e.g., the query Q(I, A, T) ? ? B(I, A, T),C(I,A), �L(I) asks for books available through a store B which are contained in a catalog C, but not in the local library L. Let the only access patterns be B ioo, B oio, C oo, and L o. If we try to execute Q from left to right, neither pattern for B works since we either lack an ISBN I or an author A. However, Q is feasible since we can execute it by first calling C(I,A) which binds both I and A; after that, calling B ioo (or B oio) will work. Calling �L(I) first and then B does not work: a negated call can only filter out answers, but cannot produce any new variable bindings. 2. Formal Results We study the problem of deciding whether a query Q is feasible, i.e., whether there exists a logically equivalent query Q ? that can be executed observing the limited access patterns given by the web service (source) relations. Executability depends on the specific syntactic form of a query, while feasibility is a more �robust � semantic notion, in-
Bertram Lud�scher; Alan Nash
Information Retrieval manuscript No. (will be inserted by the editor) When Do People Use Query Suggestion? A Query Suggestion Log Analysis
(Authors � version. The final publication is available at www.springerlink.com.) Abstract Query suggestion, which enables the user to revise a query with a single click, has become one of the most fundamental features of Web search engines. However, it has not been clear what circumstances cause the user to turn to query suggestion. In order to investigate when and how the user uses query suggestion, we analyzed three kinds of data sets obtained from a major commercial Web search engine, comprising approximately 126 million unique queries, 876 million query suggestions and 306 million action patterns of users. Our analysis shows that query suggestions are often used (1) when the original query is a rare query; (2) when the original query is a single-term query; (3) when query suggestions are unambiguous; (4) when query suggestions are generalizations or error corrections of the original query; and (5) after the user has clicked on several URLs in the first search result page. Our results suggest that search engines should provide better assistance especially when rare or single-term queries are input, and that they should dynamically provide query suggestions according to the searcher�s current state.
Katsumi Tanaka; Tetsuya Sakai
Slant rigs offer big payoffs in shallow drilling
Slant hole drilling technology can result in considerable savings over conventionally drilled deviated holes because mud motors and deviation control with measurement while drilling tools are usually unnecessary. The benefits of using slant hole rigs for development drilling improve after the bit walk tendencies and the correct bottom hole assemblies have been determined for a particular area. This article discusses three recent drilling operations that successfully used slant drilling technology on land-based projects: drilling for heavy oil in Alberta, drilling for gas in Alberta, and drilling a river crossing for a gas pipeline in British Columbia. These examples demonstrate the flexibility of slant drilling technology.
Smith, J. (George E. Failing Co., Enid, OK (US)); Edwards, B. (Sierra Drilling Co., Calgary (CA))
Underbalanced drilling guidelines improve safety, efficiency
In underbalanced drilling, the primary means of well control, the hydrostatic head of the drilling fluid, is lost either unavoidably because of hole problems (such as abnormally high pressure or lost circulation) or intentionally because of economics or to prevent formation damage. Because of complications with underbalanced drilling, however, several rigs have been destroyed by fire. Operational guidelines are being developed in close cooperation with industry. The final guidelines will be consistent with the existing standards of well control practices in Alberta, yet applicable for underbalanced drilling operations world-wide. Until formal guidelines are completed in Alberta, operators interested in underbalanced drilling should work closely with the Energy Resources Conservation Board in preparing site-specific programs. Although underbalanced drilling is often associated with horizontal wells, the majority of underbalanced drilling operations in Alberta are conducted on vertical wells. The paper describes underbalanced drilling, blowout prevention, surface BOP equipment (stripper, annular pack off, rotating head, rotating BOP, coiled tubing), subsurface BOP, drilling fluids, nitrified drilling fluids, surface equipment, well-site supervision, well control equipment, and the surface handling of fluids.
Eresman, D. (Energy Resources Conservation Board, Calgary, Alberta (Canada))
Dynamic plan migration for snapshot-equivalent continuous queries in data stream systems
A data stream management system executes a large number of continuous queries in parallel. As stream characteristics and query workload change over time, the plan initially installed for a continuous query may become inefficient. As a consequence, the ...
J�rgen Kr�mer; Yin Yang; Michael Cammert; Bernhard Seeger; Dimitris Papadias
Querying for Feature Extraction and Visualization in Climate Modeling
The ultimate goal of data visualization is to clearly portray features relevant to the problem being studied. This goal can be realized only if users can effectively communicate to the visualization software what features are of interest. To this end, we describe in this paper two query languages used by scientists to locate and visually emphasize relevant data in both space and time. These languages offer descriptive feedback and interactive refinement of query parameters, which are essential in any framework supporting queries of arbitrary complexity. We apply these languages to extract features of interest from climate model results and describe how they support rapid feature extraction from large datasets.
Johnson, C. Ryan [University of Tennessee, Knoxville (UTK); Glatter, Markus [University of Tennessee, Knoxville (UTK); Kendall, Wesley [University of Tennessee, Knoxville (UTK); Huang, Jian [University of Tennessee, Knoxville (UTK); Hoffman, Forrest M [ORNL
Reservoir screening criteria for underbalanced drilling
Properly designed and executed underbalanced drilling operations can eliminate or significantly reduce formation damage, mud or drill solids invasion, lost circulation, fluid entrainment and trapping effects, and potential adverse reactions of drilling fluids with the reservoir matrix or in-situ reservoir fluids. The key to selecting appropriate reservoir candidates is achieving a balance of technical, safety and economic factors. Not every reservoir is an ideal candidate for an underbalanced drilling operation and in some cases distinct disadvantages may exist in trying to execute an underbalanced drilling operation in comparison to a simpler more conventional overbalanced application. Extensive field experience has played an important role in determining the following key criteria and design considerations that should be examined when evaluating a well. Screening criteria are also provided to help operators ascertain if a given formation is, in fact, a viable underbalanced drilling candidate.
Bennion, D.B. [Hycal Energy Research Labs. Ltd., Calgary, Alberta (Canada)
Advanced Seismic While Drilling System
A breakthrough has been discovered for controlling seismic sources to generate selectable low frequencies. Conventional seismic sources, including sparkers, rotary mechanical, hydraulic, air guns, and explosives, by their very nature produce high-frequencies. This is counter to the need for long signal transmission through rock. The patent pending SeismicPULSER{trademark} methodology has been developed for controlling otherwise high-frequency seismic sources to generate selectable low-frequency peak spectra applicable to many seismic applications. Specifically, we have demonstrated the application of a low-frequency sparker source which can be incorporated into a drill bit for Drill Bit Seismic While Drilling (SWD). To create the methodology of a controllable low-frequency sparker seismic source, it was necessary to learn how to maximize sparker efficiencies to couple to, and transmit through, rock with the study of sparker designs and mechanisms for (a) coupling the sparker-generated gas bubble expansion and contraction to the rock, (b) the effects of fluid properties and dynamics, (c) linear and non-linear acoustics, and (d) imparted force directionality. After extensive seismic modeling, the design of high-efficiency sparkers, laboratory high frequency sparker testing, and field tests were performed at the University of Texas Devine seismic test site. The conclusion of the field test was that extremely high power levels would be required to have the range required for deep, 15,000+ ft, high-temperature, high-pressure (HTHP) wells. Thereafter, more modeling and laboratory testing led to the discovery of a method to control a sparker that could generate low frequencies required for deep wells. The low frequency sparker was successfully tested at the Department of Energy Rocky Mountain Oilfield Test Center (DOE RMOTC) field test site in Casper, Wyoming. An 8-in diameter by 26-ft long SeismicPULSER{trademark} drill string tool was designed and manufactured by TII. An APS Turbine Alternator powered the SeismicPULSER{trademark} to produce two Hz frequency peak signals repeated every 20 seconds. Since the ION Geophysical, Inc. (ION) seismic survey surface recording system was designed to detect a minimum downhole signal of three Hz, successful performance was confirmed with a 5.3 Hz recording with the pumps running. The two Hz signal generated by the sparker was modulated with the 3.3 Hz signal produced by the mud pumps to create an intense 5.3 Hz peak frequency signal. The low frequency sparker source is ultimately capable of generating selectable peak frequencies of 1 to 40 Hz with high-frequency spectra content to 10 kHz. The lower frequencies and, perhaps, low-frequency sweeps, are needed to achieve sufficient range and resolution for realtime imaging in deep (15,000 ft+), high-temperature (150 C) wells for (a) geosteering, (b) accurate seismic hole depth, (c) accurate pore pressure determinations ahead of the bit, (d) near wellbore diagnostics with a downhole receiver and wired drill pipe, and (e) reservoir model verification. Furthermore, the pressure of the sparker bubble will disintegrate rock resulting in an increased overall rates of penetration. Other applications for the SeismicPULSER{trademark} technology are to deploy a low-frequency source for greater range on a wireline for Reverse Vertical Seismic Profiling (RVSP) and Cross-Well Tomography. Commercialization of the technology is being undertaken by first contacting stakeholders to define the value proposition for rig site services utilizing SeismicPULSER{trademark} technologies. Stakeholders include national oil companies, independent oil companies, independents, service companies, and commercial investors. Service companies will introduce a new Drill Bit SWD service for deep HTHP wells. Collaboration will be encouraged between stakeholders in the form of joint industry projects to develop prototype tools and initial field trials. No barriers have been identified for developing, utilizing, and exploiting the low-frequency SeismicPULSER{trademark} source in a
Robert Radtke; John Fontenot; David Glowka; Robert Stokes; Jeffery Sutherland; Ron Evans; Jim Musser
Appendix B � Pre-Selected Query Items - U.S. Energy ...
Appendix B � Pre-Selected Query Items Description Memo Units Answers to Question in Part II about Alternative Fuel Vehicles This Query has the answers from
Diffusion bonding of Stratapax for drill bits
A process has been developed for the diffusion bonding of General Electric's Stratapax drill blanks to support studs for cutter assemblies in drill bits. The diffusion bonding process is described and bond strength test data are provided for a variety of materials. The extensive process details, provided in the Appendices, should be sufficient to enable others to successfully build diffusion-bonded drill bit cutter assemblies.
Middleton, J.N.; Finger, J.T.
OCEAN DRILLING PROGRAM LEG 103 SCIENTIFIC PROSPECTUS GALICIA BANK Gilbert Boillot Edward L of Energy, Mines and Resources (Canada) Deutsche Forschungsgemeinschaft (Federal Republic of Germany
Quantifying Edge Defects in Drilled FRP Composites
Drilling of Aramid and Carbon Fiber Polymer Composites�,the Exit Defects in Carbon Fiber-Reinforced Plastic Plateswith a High Modulus CFRP (Carbon- Fiber Reinforced Polymer)
Vijayaraghavan, Athulan; Dornfeld, David; Dharan, C. K. Hari
Specific energy for pulsed laser rock drilling
Application of advanced high power laser technology to oil and gas well drilling has been attracting significant research interests recently among research institutes
Z. Xu; C. B. Reed; G. Konercki; R. A. Parker; B. C. Gahan; S. Batarseh; R. M. Graves; H. Figueroa; N. Skinner
Crude Oil and Natural Gas Drilling Activity
Crude Oil and Natural Gas Drilling Activity Period: Download Series History: Definitions, Sources & Notes: Data Series: Jun-13 Jul-13 Aug-13 ...
Strong growth projected for underbalanced drilling
The use of underbalanced drilling technology should grow steadily during the next decade. The projected growth is primarily driven by increased concern about formation damage, the potential for higher penetration rates, and the ability to reduce lost circulation in depleted reservoirs. The Department of Energy`s Morgantown Energy Technology Center manages a portfolio of drilling-related research, development, and demonstration (RD and D) projects designed to reduce costs and improve efficiencies. The Department of Energy sponsored Maurer Engineering Inc. (MEI) to develop a user-friendly foam drilling model that can accurately predict pressure drops, cuttings lifting velocities, foam quality, and other foam drilling variables. A second objective of the project was to develop a light-weight drilling fluid that would allow underbalanced drilling in low-pressure reservoirs without the limitations commonly associated with existing light-weight fluids. Maurer performed a study to gauge the potential for light-weight drilling fluids and the extent of underbalanced drilling activity in the US. Data from many industry sources, including recent publications on the potential for air drilling, were evaluated and incorporated into this study. This paper discusses the findings from this survey.
Duda, J.R. [Dept. of Energy, Morgantown, WV (United States); Medley, G.H. Jr.; Deskins, W.G. [Maurer Engineering Inc., Houston, TX (United States)
Category:Exploration Drilling | Open Energy Information
Category Edit History Facebook icon Twitter icon Category:Exploration Drilling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the...
Vale exploratory slimhole: Drilling and testing
During April-May, 1995, Sandia National Laboratories, in cooperation with Trans-Pacific Geothermal Corporation, drilled a 5825{prime} exploratory slimhole (3.85 in. diameter) in the Vale Known Geothermal Resource Area (KGRA) near Vale, Oregon. This well was part of Sandia`s program to evaluate slimholes as a geothermal exploration tool. During drilling we performed several temperature logs, and after drilling was complete we performed injection tests, bailing from a zone isolated by a packer, and repeated temperature logs. In addition to these measurements, the well`s data set includes: 2714{prime} of continuous core (with detailed log); daily drilling reports from Sandia and from drilling contractor personnel; daily drilling fluid records; numerous temperature logs; pressure shut-in data from injection tests; and comparative data from other wells drilled in the Vale KGRA. This report contains: (1) a narrative account of the drilling and testing, (2) a description of equipment used, (3) a brief geologic description of the formation drilled, (4) a summary and preliminary interpretation of the data, and (5) recommendations for future work.
Finger, J.T.; Jacobson, R.D.; Hickox, C.E.
Driltac (Drilling Time and Cost Evaluation)
The users manual for the drill tech model for estimating the costs of geothermal wells. The report indicates lots of technical and cost detail. [DJE-2005
Alloy Development for Measurement While Drilling Tools
Abstract Scope, For oil and gas drilling applications, one of the giant technical ... of Type 2507 Duplex Stainless Steel in Synthetic Seawater and Hydraulic Fluids.
Loaded Transducer Fpr Downhole Drilling Component
A robust transmission element for transmitting information between downhole tools, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks, mud, fluids, lubricants, and the like. The transmission element maintains reliable connectivity between transmission elements, thereby providing an uninterrupted flow of information between drill string components. A transmission element is mounted within a recess proximate a mating surface of a downhole drilling component, such as a section of drill pipe. To close gaps present between transmission elements, transmission elements may be biased with a "spring force," urging them closer together.
Hall, David R. (Provo, UT); Hall, H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT); Fox, Joe (Spanish Fork, UT)
HDF5-FastQuery: An API for Simplifying Access to Data Storage,Retrieval, Indexing and Querying
This work focuses on research and development activities that bridge a gap between fundamental data management technology index, query, storage and retrieval and use of such technology in computational and computer science algorithms and applications. The work has resulted in a streamlined applications programming interface (API) that simplifies data storage and retrieval using the HDF5 data I/O library, and eases use of the FastBit compressed bitmap indexing software for data indexing/querying. The API, which we call HDF5-FastQuery, will have broad applications in domain sciences as well as associated data analysis and visualization applications.
Bethel, E. Wes; Gosink, Luke; Shalf, John; Stockinger, Kurt; Wu,Kesheng
Design of FastQuery: How to Generalize Indexing and Querying System for Scientific Data
Modern scientific datasets present numerous data management and analysis challenges. State-of-the-art index and query technologies such as FastBit are critical for facilitating interactive exploration of large datasets. These technologies rely on adding auxiliary information to existing datasets to accelerate query processing. To use these indices, we need to match the relational data model used by the indexing systems with the array data model used by most scientific data, and to provide an efficient input and output layer for reading and writing the indices. In this work, we present a flexible design that can be easily applied to most scientific data formats. We demonstrate this flexibility by applying it to two of the most commonly used scientific data formats, HDF5 and NetCDF. We present two case studies using simulation data from the particle accelerator and climate simulation communities. To demonstrate the effectiveness of the new design, we also present a detailed performance study using both synthetic and real scientific workloads.
Wu, Jerry; Wu, Kesheng
Multiple Example Queries in Content-Based Image Retrieval
Content-Based Image Retrieval (cbir) is the practical class of techniques used for information retrieval from large image collections. Many CBIR systems allow users to specify their information need by providing an example image. This query-by-example ...
Seyed M. M. Tahaghoghi; James A. Thom; Hugh E. Williams
TOP-K projection queries for probabilistic business processes
A Business Process (BP) consists of some business activities undertaken by one or more organizations in pursuit of some business goal. Tools for querying and analyzing BP specifications are extremely valuable for companies. In particular, given a BP ...
Daniel Deutch; Tova Milo
Intuitive Interaction with Encrypted Query Execution in DataStorm
The encrypted execution of database queries promises powerful security protections, however users are currently unlikely to benefit without significant expertise. In this demonstration, we illustrate a simple workflow enabling users to design secure ...
Ken Smith; Ameet Kini; William Wang; Chris Wolf; M. David Allen; Andrew Sillers
Processing Private Queries over Untrusted Data Cloud through Privacy Homomorphism
Tong, Hong Kong SAR, China {haibo,xujl,csren,firstname.lastname@example.com Abstract--Query processing directory and another on anti-diabetic drugs, together give a higher confidence that the user is probably
Xu, Jianliang
Adaptive Support of Range Queries via Push-Pull Algorithms
In many real time interactive simulations the problem of interest management is that of filtering updates through application-specified range queries. This "associative' form of memory access is often implemented more simply as a reference memory access ...
Rob Minson; Georgios Theodoropoulos
Processing nested complex sequence pattern queries over event streams
Complex event processing (CEP) has become increasingly important for tracking and monitoring applications ranging from health care, supply chain management to surveillance. These monitoring applications submit complex event queries to track sequences ...
Mo Liu; Medhabi Ray; Elke A. Rundensteiner; Daniel J. Dougherty; Chetan Gupta; Song Wang; Ismail Ari; Abhay Mehta
Alta Vista: Simple Query "merde d'alors" - CECM
Tip: To use all these apples: +apple pie tart cookie torte muffin. Ignored: merde d alors:0. No documents match the query. The term does not appear in the index.
Form EIA-176 Query System Getting Started Guide Version 2
1.0 Introduction 1.1 Purpose and Functions The EIA-176 Query System is a PC-based system for users to produce reports and extract data from the Energy Information ...
EIA 176 Query System, 2001 - Energy Information Administration
On Graph Based Interaction for Semantic Query Languages
In the last years, several proposals have been presented concerning graphical query languages working on diagrammatic representations of semantic data models. Such proposals are mainly based on two different user interaction modalities, i.e., to allow ...
Giuseppe Santucci
EIA-176 Query System 2007 - Energy Information Administration
You may download the data tables if you already have Microsoft Access 2000-2003 on your computer or download the query system via a zip file if you do not have ...
Query reformulation and refinement using NLP-based sentence clustering
We have developed an interactive query refinement tool that helps users search a knowledge base for solutions to problems with electronic equipment. The system is targeted towards non-technical users, who are often unable to formulate precise problem ...
Fr�d�ric Roulland; Aaron Kaplan; Stefania Castellani; Claude Roux; Antonietta Grasso; Karin Pettersson; Jacki O'Neill
Using semantic knowledge to improve web query processing
Although search engines are very useful for obtaining information from the World Wide Web, users still have problems obtaining the most relevant information when processing their web queries. Prior research has attempted to use different types of knowledge ...
Jordi Conesa; Veda C. Storey; Vijayan Sugumaran
Slim-hole Measurement While Drilling (MWD) system for underbalanced drilling
The objective of this program is to make commercially available, wireless Measurement-while-drilling tools to reliably operate in air, air-mist, air-foam, and other unbalanced drilling environments during oil and gas directional drilling operations in conjunction with down-hole motors or other assemblies. Progress is described.
Harrison, W.H.; Harrison, J.D.; Rubin, L.A.
NETL Extreme Drilling Laboratory Studies High Pressure High Temperature Drilling Phenomena
The U.S. Department of Energy�s National Energy Technology Laboratory (NETL) established an Extreme Drilling Lab to engineer effective and efficient drilling technologies viable at depths greater than 20,000 feet. This paper details the challenges of ultra-deep drilling, documents reports of decreased drilling rates as a result of increasing fluid pressure and temperature, and describes NETL�s Research and Development activities. NETL is invested in laboratory-scale physical simulation. Their physical simulator will have capability of circulating drilling fluids at 30,000 psi and 480 �F around a single drill cutter. This simulator will not yet be operational by the planned conference dates; therefore, the results will be limited to identification of leading hypotheses of drilling phenomena and NETL�s test plans to validate or refute such theories. Of particular interest to the Extreme Drilling Lab�s studies are the combinatorial effects of drilling fluid pressure, drilling fluid properties, rock properties, pore pressure, and drilling parameters, such as cutter rotational speed, weight on bit, and hydraulics associated with drilling fluid introduction to the rock-cutter interface. A detailed discussion of how each variable is controlled in a laboratory setting will be part of the conference paper and presentation.
Lyons, K.D.; Honeygan, S.; Moroz, T
The U.S. Department of Energy's National Energy Technology Laboratory (NETL) established the Extreme Drilling Laboratory to engineer effective and efficient drilling technologies viable at depths greater than 20,000 ft. This paper details the challenges of ultradeep drilling, documents reports of decreased drilling rates as a result of increasing fluid pressure and temperature, and describes NETL's research and development activities. NETL is invested in laboratory-scale physical simulation. Its physical simulator will have capability of circulating drilling fluids at 30,000 psi and 480�F around a single drill cutter. This simulator is not yet operational; therefore, the results will be limited to the identification of leading hypotheses of drilling phenomena and NETL's test plans to validate or refute such theories. Of particular interest to the Extreme Drilling Laboratory's studies are the combinatorial effects of drilling fluid pressure, drilling fluid properties, rock properties, pore pressure, and drilling parameters, such as cutter rotational speed, weight on bit, and hydraulics associated with drilling fluid introduction to the rock-cutter interface. A detailed discussion of how each variable is controlled in a laboratory setting will be part of the conference paper and presentation.
Lyons, K.D.; Honeygan, S.; Moroz, T.H.
We review a query log of hundreds of millions of queries that constitute the total query traffic for an entire week of a generalpurpose commercial web search service. Previously, query logs have been studied from a single, cumulative view. In contrast, our analysis shows changes in popularity and uniqueness of topically categorized queries across the hours of the day. We examine query traffic on an hourly basis by matching it against lists of queries that have been topically pre-categorized by human editors. This represents 13 % of the query traffic. We show that query traffic from particular topical categories differs both from the query stream as a whole and from other categories. This analysis provides valuable insight for improving retrieval effectiveness and efficiency. It is also relevant to the development of enhanced query disambiguation, routing, and caching algorithms.
High Performance Visualization using Query-Driven Visualizationand Analytics
Query-driven visualization and analytics is a unique approach for high-performance visualization that offers new capabilities for knowledge discovery and hypothesis testing. The new capabilities akin to finding needles in haystacks are the result of combining technologies from the fields of scientific visualization and scientific data management. This approach is crucial for rapid data analysis and visualization in the petascale regime. This article describes how query-driven visualization is applied to a hero-sized network traffic analysis problem.
Bethel, E. Wes; Campbell, Scott; Dart, Eli; Shalf, John; Stockinger, Kurt; Wu, Kesheng
Query Routing in Large-scale Digital Library Systems
Modern digital libraries require user-friendly and yet responsive access to the rapidly growing, heterogeneous, and distributed collection of information sources. However, the increasing volume and diversity of digital information available online have led to a growing problem that conventional data management systems do not have, namely #nding which information sources out of many candidate choices are the most relevant to answer a given user query.We refer to this problem as the query routing problem.
Ling Liu
Commercial introduction of Microhole Technology to the gas and oil drilling industry requires an effective downhole drive mechanism which operates efficiently at relatively high RPM and low bit weight for delivering efficient power to the special high RPM drill bit for ensuring both high penetration rate and long bit life. This project entails developing and testing a more efficient 2-7/8 in. diameter Turbodrill and a novel 4-1/8 in. diameter drill bit for drilling with coiled tubing. The high-power Turbodrill were developed to deliver efficient power, and the more durable drill bit employed high-temperature cutters that can more effectively drill hard and abrasive rock. This project teams Schlumberger Smith Neyrfor and Smith Bits, and NASA AMES Research Center with Technology International, Inc (TII), to deliver a downhole, hydraulically-driven power unit, matched with a custom drill bit designed to drill 4-1/8 in. boreholes with a purpose-built coiled tubing rig. The U.S. Department of Energy National Energy Technology Laboratory has funded Technology International Inc. Houston, Texas to develop a higher power Turbodrill and drill bit for use in drilling with a coiled tubing unit. This project entails developing and testing an effective downhole drive mechanism and a novel drill bit for drilling 'microholes' with coiled tubing. The new higher power Turbodrill is shorter, delivers power more efficiently, operates at relatively high revolutions per minute, and requires low weight on bit. The more durable thermally stable diamond drill bit employs high-temperature TSP (thermally stable) diamond cutters that can more effectively drill hard and abrasive rock. Expectations are that widespread adoption of microhole technology could spawn a wave of 'infill development' drilling of wells spaced between existing wells, which could tap potentially billions of barrels of bypassed oil at shallow depths in mature producing areas. At the same time, microhole coiled tube drilling offers the opportunity to dramatically cut producers' exploration risk to a level comparable to that of drilling development wells. Together, such efforts hold great promise for economically recovering a sizeable portion of the estimated remaining shallow (less than 5,000 feet subsurface) oil resource in the United States. The DOE estimates this U.S. targeted shallow resource at 218 billion barrels. Furthermore, the smaller 'footprint' of the lightweight rigs utilized for microhole drilling and the accompanying reduced drilling waste disposal volumes offer the bonus of added environmental benefits. DOE analysis shows that microhole technology has the potential to cut exploratory drilling costs by at least a third and to slash development drilling costs in half.
Robert Radtke; David Glowka; Man Mohan Rai; David Conroy; Tim Beaton; Rocky Seale; Joseph Hanna; Smith Neyrfor; Homer Robertson
Coiled tubing drilling with supercritical carbon dioxide
A method for increasing the efficiency of drilling operations by using a drilling fluid material that exists as supercritical fluid or a dense gas at temperature and pressure conditions existing at a drill site. The material can be used to reduce mechanical drilling forces, to remove cuttings, or to jet erode a substrate. In one embodiment, carbon dioxide (CO.sub.2) is used as the material for drilling within wells in the earth, where the normal temperature and pressure conditions cause CO.sub.2 to exist as a supercritical fluid. Supercritical carbon dioxide (SC--CO.sub.2) is preferably used with coiled tube (CT) drilling equipment. The very low viscosity SC--CO.sub.2 provides efficient cooling of the drill head, and efficient cuttings removal. Further, the diffusivity of SC--CO.sub.2 within the pores of petroleum formations is significantly higher than that of water, making jet erosion using SC--CO.sub.2 much more effective than water jet erosion. SC--CO.sub.2 jets can be used to assist mechanical drilling, for erosion drilling, or for scale removal. A choke manifold at the well head or mud cap drilling equipment can be used to control the pressure within the borehole, to ensure that the temperature and pressure conditions necessary for CO.sub.2 to exist as either a supercritical fluid or a dense gas occur at the drill site. Spent CO.sub.2 can be vented to the atmosphere, collected for reuse, or directed into the formation to aid in the recovery of petroleum.
Kolle , Jack J. (Seattle, WA)
Laser Drilling - Drilling with the Power of Light
Gas Technology Institute (GTI) has been the leading investigator in the field of high power laser applications research for well construction and completion applications. Since 1997, GTI (then as Gas Research Institute- GRI) has investigated several military and industrial laser systems and their ability to cut and drill into reservoir type rocks. In this report, GTI continues its investigation with a 5.34 kW ytterbium-doped multi-clad high power fiber laser (HPFL). When compared to its competitors; the HPFL represents a technology that is more cost effective to operate, capable of remote operations, and requires considerably less maintenance and repair. Work performed under this contract included design and implementation of laboratory experiments to investigate the effects of high power laser energy on a variety of rock types. All previous laser/rock interaction tests were performed on samples in the lab at atmospheric pressure. To determine the effect of downhole pressure conditions, a sophisticated tri-axial cell was designed and tested. For the first time, Berea sandstone, limestone and clad core samples were lased under various combinations of confining, axial and pore pressures. Composite core samples consisted of steel cemented to rock in an effort to represent material penetrated in a cased hole. The results of this experiment will assist in the development of a downhole laser perforation or side tracking prototype tool. To determine how this promising laser would perform under high pressure in-situ conditions, GTI performed a number of experiments with results directly comparable to previous data. Experiments were designed to investigate the effect of laser input parameters on representative reservoir rock types of sandstone and limestone. The focus of the experiments was on laser/rock interaction under confining pressure as would be the case for all drilling and completion operations. As such, the results would be applicable to drilling, perforation, and side tracking applications. In the past, several combinations of laser and rock variables were investigated at standard conditions and reported in the literature. More recent experiments determined the technical feasibility of laser perforation on multiple samples of rock, cement and steel. The fiber laser was capable of penetrating these materials under a variety of conditions, to an appropriate depth, and with reasonable energy requirements. It was determined that fiber lasers are capable of cutting rock without causing damage to flow properties. Furthermore, the laser perforation resulted in permeability improvements on the exposed rock surface. This report has been prepared in two parts and each part may be treated as a stand-alone document. Part 1 (High Energy Laser Drilling) includes the general description of the concept and focuses on results from experiments under the ambient lab conditions. Part 2 (High Energy Laser Perforation and Completion Techniques) discusses the design and development of a customized laser pressure cell; experimental design and procedures, and the resulting data on pressure-charged samples exposed to the laser beam. An analysis provides the resulting effect of downhole pressure conditions on the laser/rock interaction process.
Iraj A. Salehi; Brian C. Gahan; Samih Batarseh
Measurement-While-Drilling (MWD) development for air drilling
When downhole contact between the BHA and formation was optimum, as it was during rotation, high signal levels were experienced. Survey data acquired at the connections, when the BHA was totally at rest, is excellent. GEC intends modifying the system to optimize operations consistent with these disparate factors. A Mean-Time-To-Failure (MTTF) of 89.9 hours appears reasonable from the data. It is not possible to infer an MTBF figure from this test. It is quite obvious, however, that the system reliability performance has been significantly improved since FT {number_sign}5 was performed almost two years earlier. Based on the above results, GEC concludes that it is certainly feasible to attain 100 hours MTBF, for the Model 27, in any and all situations, and hence to provide a reliable MWD for air-drilling.
Harrison, W.A.; Rubin, L.A.
Gas Technology Institute (GTI) has been the leading investigator in the field of high power laser applications research for well construction and completion applications. Since 1997, GTI (then as Gas Research Institute) has investigated several military and industrial laser systems and their ability to cut and drill into reservoir type rocks. In this report, GTI continues its investigation with a recently acquired 5.34 kW ytterbium-doped multi-clad high power fiber laser (HPFL). The HPFL represents a potentially disruptive technology that, when compared to its competitors, is more cost effective to operate, capable of remote operations, and requires considerably less maintenance and repair. To determine how this promising laser compares with other lasers used in past experimental work, GTI performed a number of experiments with results directly comparable to previous data. Experiments were designed to investigate the effect of laser input parameters on representative reservoir rock types of sandstone and limestone. The focus of the experiments was on completion and perforation applications, although the results and techniques apply to well construction and other rock cutting applications. Variables investigated include laser power, beam intensity, external purging of cut materials, sample orientation, beam duration, beam shape, and beam frequency. The investigation also studied the thermal effects on the two sample rock types and their methods of destruction: spallation for sandstone, and thermal dissociation for limestone. Optimal operating conditions were identified for each rock type and condition. As a result of this experimental work, the HPFL has demonstrated a better capability of cutting and drilling limestone and sandstone when compared with other military and industrial lasers previously tested. Consideration should be given to the HPFL as the leading candidate for near term remote high power laser applications for well construction and completion.
Brian C. Gahan; Samih Batarseh
Comparing crowd-based, game-based, and machine-based approaches in initial query and query refinement tasks
Human computation techniques have demonstrated their ability to accomplish portions of tasks that machine-based techniques find difficult. Query refinement is a task that may benefit from human involvement. We conduct an experiment that evaluates the ...
Christopher G. Harris; Padmini Srinivasan
Multi-gradient drilling method and system
A multi-gradient system for drilling a well bore from a surface location into a seabed includes an injector for injecting buoyant substantially incompressible articles into a column of drilling fluid associated with the well bore. Preferably, the substantially incompressible articles comprises hollow substantially spherical bodies.
Maurer, William C. (Houston, TX); Medley, Jr., George H. (Spring, TX); McDonald, William J. (Houston, TX)
Electro jet drilling using hybrid NNGA approach
This paper presents a hybrid neural network and genetic algorithm (NNGA) approach for the multi-response optimization of the electro jet drilling (EJD) process. The approach first uses a neural network model to predict the response parameters of the ... Keywords: Electro jet drilling, Electrochemical machining, Genetic algorithm, Multi-response, Neural network, Optimization
Mohan Sen; H. S. Shan
Ocean Drilling Program Texas A&M University 1000 Discovery Drive College Station TX 77845-9547 USA by the Ocean Drilling Program, Texas A&M University, as an account of work performed under the international of the National Science Foundation, the participating agencies, Joint Oceanographic Institutions, Inc., Texas A&M
Ocean Drilling Program Texas A&M University 1000 Discovery Drive College Station TX 77845-9547 USA, Texas A&M University, as an account of work performed under the international Ocean Drilling Program Foundation, the participating agencies, Joint Oceanographic Institutions, Inc., Texas A&M University
Balanced pressure techniques applied to geothermal drilling
The objective of the study is to evaluate balanced pressure drilling techniques for use in combating lost circulation in geothermal drilling. Drilling techniques evaluated are: aerated drilling mud, parasite tubing, concentric drill pipe, jet sub, and low density fluids. Based on the present state of the art of balanced pressure drilling techniques, drilling with aerated water has the best overall balance of performance, risk, availability, and cost. Aerated water with a 19:1 free air/water ratio reduce maximum pressure unbalance between wellbore and formation pressures from 1000 psi to 50 psi. This pressure unbalance is within acceptable operating limits; however, air pockets could form and cause pressure surges in the mud system due to high percent of air. Low density fluids used with parasite tubing has the greatest potential for combating lost circulation in geothermal drilling, when performance only is considered. The top portion of the hole would be aerated through the parasite tube at a 10:1 free air/mud ratio and the low density mud could be designed so that its pressure gradient exactly matches the formation pore pressure gradient. The main problem with this system at present is the high cost of ceramic beads needed to produce low density muds.
Dareing, D.W.
Interpretation of drill cuttings from geothermal wells
Problems in interpreting drill cuttings, as opposed to drill cores, and methods to solve these problems are outlined. The following are covered: identification of lithology; recognition of faults and fractures; interpretation of hydrothermal alteration; geochemistry; sample collection; sample preparple examination; and sample storage. (MHR)
Hulen, J.B.; Sibbett, B.S.
Scientific drilling technologies for hostile environments
This paper briefly reviews the current United States Department of Energy Continental Scientific Drilling Program for Thermal Regimes and the related technologies being developed for geothermal drilling. Plans for penetrating into a molten magma body at temperatures from 800 to 1000{degree}C are also reviewed. 7 refs., 3 figs., 1 tab.
Traeger, R.K.
Status Report A Review of Slimhole Drilling
This 1994 report reviews the various applications of slimhole technology including for exploration in remote areas, low-cost development wells, reentering existing wells, and horizontal and multilateral drilling. Advantages of slimholes to regular holes are presented. Limitations and disadvantages of slimholes are also discussed. In 1994, slimhole drilling was still an ongoing development technology. (DJE 2005)
Zhu, Tao; Carroll, Herbert B.
Alpine Geothermal Drilling | Open Energy Information
Geothermal Drilling Geothermal Drilling Jump to: navigation, search Logo: Alpine Geothermal Drilling Name Alpine Geothermal Drilling Address PO Box 141 Place Kittredge, Colorado Zip 80457 Sector Geothermal energy Product Geothermal drilling solutions, subsidiary of Rocky Mountain GeoExploration Inc Website http://www.alpinegeothermal.co Coordinates 39.64888°, -105.2984842° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.64888,"lon":-105.2984842,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Salt Wells Geothermal Exploratory Drilling Program EA
Salt Wells Geothermal Exploratory Drilling Program EA Salt Wells Geothermal Exploratory Drilling Program EA (DOI-BLM-NV-C010-2009-0006-EA) Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Salt Wells Geothermal Exploratory Drilling Program EA (DOI-BLM-NV-C010-2009-0006-EA) Abstract No abstract available. Author Bureau of Land Management Published U.S. Department of the Interior- Bureau of Land Management, Carson City Field Office, Nevada, 09/14/2009 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Salt Wells Geothermal Exploratory Drilling Program EA (DOI-BLM-NV-C010-2009-0006-EA) Citation Bureau of Land Management. Salt Wells Geothermal Exploratory Drilling Program EA (DOI-BLM-NV-C010-2009-0006-EA) [Internet]. 09/14/2009. Carson City, NV. U.S. Department of the Interior- Bureau of Land Management,
Definition: Exploration Drilling | Open Energy Information
Exploration Drilling Exploration Drilling Jump to: navigation, search Dictionary.png Exploration Drilling Exploratory drilling is the Initial phase of drilling for the purpose of determining the physical properties and boundaries of a reservoir. View on Wikipedia Wikipedia Definition Geothermal Exploration is the exploration of the subsurface in search of viable active geothermal regions with the goal of building a geothermal power plant, where hot fluids drive turbines to create electricity. Exploration methods include a broad range of disciplines including geology, geophysics, geochemistry and engineering. Geothermal regions with adequate heat flow to fuel power plants are found in rift zones, subduction zones and mantle plumes. Hot spots are characterized by four geothermal elements. An active region will have: Heat Source - Shallow
Geothermal drilling and completion technology development
The high cost of drilling and completing geothermal wells is an impediment to the development of geothermal energy resources. Technological deficiencies in rotary drilling techniques are evidenced when drilling geothermal wells. The Division of Geothermal Energy (DGE) of the U.S. Department of Energy has initiated a program aimed at developing new drilling and completion techniques for geothermal wells. The goals of this program are to reduce well costs by 25% by 1982 and by 50% by 1986. Sandia Laboratories has been selected to manage this technology development program, and this paper presents an overview of the program. Program justification which relates well cost to busbar energy cost and to DGE power-on-line goals is presented. Technological deficiencies in current rotary drilling techniques for geothermal wells are discussed. A program for correcting these deficiencies is described.
Varnado, S.G.; Stoller, H.M.
Comparative analysis of core drilling and rotary drilling in volcanic terrane
Initially, the goal of this report is to compare and contrast penetration rates of rotary-mud drilling and core drilling in young volcanic terranes. It is widely recognized that areas containing an abundance of recent volcanic rocks are excellent targets for geothermal resources. Exploration programs depend heavily upon reliable subsurface information, because surface geophysical methods may be ineffective, inconclusive, or both. Past exploration drilling programs have mainly relied upon rotary-mud rigs for virtually all drilling activity. Core-drilling became popular several years ago, because it could deal effectively with two major problems encountered in young volcanic terranes: very hard, abrasive rock and extreme difficulty in controlling loss of circulation. In addition to overcoming these difficulties, core-drilling produced subsurface samples (core) that defined lithostratigraphy, structure and fractures far better than drill-chips. It seemed that the only negative aspect of core drilling was cost. The cost-per-foot may be two to three times higher than an ''initial quote'' for rotary drilling. In addition, penetration rates for comparable rock-types are often much lower for coring operations. This report also seeks to identify the extent of wireline core drilling (core-drilling using wireline retrieval) as a geothermal exploration tool. 25 refs., 21 figs., 13 tabs.
Flynn, T.; Trexler, D.T.; Wallace, R.H. Jr. (ed.)
Answering natural language queries over linked data graphs: a distributional semantics approach
This paper demonstrates Treo, a natural language query mechanism for Linked Data graphs. The approach uses a distributional semantic vector space model to semantically match user query terms with data, supporting vocabulary-independent (or ... Keywords: distributional-compositional semantics, knowledge graphs, natural language queries, schema-agnostic queries, semantic search
Andr� Freitas; Fabr�cio F. de Faria; Se�n O'Riain; Edward Curry
Interpretation of coordinations, compound generation, and result fusion for query variants
We investigate interpreting coordinations (e.g. word sequences connected with coordinating conjunctions such as "and" and "or") as logical disjunctions of terms to generate a set of disjunctionfree query variants for information retrieval (IR) queries. ... Keywords: compounds, query structure, query variants, result set fusion
Johannes Leveling
Extensible/Rule Based Query Rewrite Optimization in Starburst Hamid Pirahesh
@cs.berkeley.edu, firstname.lastname@example.com Abstract This paper describes the Query Rewrite facility of the Starburst extensible, suggesting that Query Rewrite in general --- and these rewrite rules in particular --- are an essential step during Query Rewrite. Although it is accepted doctrine that query languages should be declarative, we
Hellerstein, Joseph M.
SavvySearch: A MetaSearch Engine that Learns which Search Engines to Query
(query terms) and options for the search. Users typically enter two query terms. The options cover tracks long term performance of search engines on specific query terms to determine which are appropriate the interface for us. 3 #12; Figure 1: User interface to SavvySearch for entering a query 4 #12; Concurrency has
Howe, Adele E.
Alaska Oil and Gas Conservation Commission: February 2011 Drilling...
Oil and Gas Conservation Commission: February 2011 Drilling & Permit Records This dataset contains oil and gas drilling and permit records for February 2011. State oil and gas...
Geotechnical Drilling in New-Zealand | Open Energy Information
2013 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Geotechnical Drilling in New-Zealand Citation SonicSampDrill. Geotechnical...
Water Wells and Drilled or Mined Shafts (Texas) | Department...
Water Wells and Drilled or Mined Shafts (Texas) Water Wells and Drilled or Mined Shafts (Texas) Eligibility Utility Fed. Government Commercial Investor-Owned Utility Industrial...
State-of-the-art of drilling thrusters
Several different concepts for applying force or thrust to drill bits are identified. Recommendations for further studies of drilling thrusters are made.
Oil and Gas Exploration, Drilling, Transportation, and Production...
Oil and Gas Exploration, Drilling, Transportation, and Production (South Carolina) Oil and Gas Exploration, Drilling, Transportation, and Production (South Carolina) Eligibility...
Google.org-Backed Potter Drilling Blazing Geothermal Trail |...
Other Agencies You are here Home Google.org-Backed Potter Drilling Blazing Geothermal Trail Google.org-Backed Potter Drilling Blazing Geothermal Trail September 22, 2010...
NNSA Small Business Week Day 2: United Drilling, Inc. | National...
National Nuclear Security Administration (NNSA)
business based in Roswell, N.M. United Drilling drills oil, gas, water, geothermal, and environmental wells throughout the southwestern U.S. The small business has...
NETL: News Release - DOE-Industry Breakthrough Turns Drilling...
30, 2002 DOE-Industry Breakthrough Turns Drilling System Into Lightning Fast Computer Network Energy Department Cites Remarkable Advance In 'Smart' Oil, Gas Drilling SAN ANTONIO,...
Improved Bottomhole Pressure Control for Underbalanced Drilling Operations.
??Maintaining underbalanced conditions from the beginning to the end of the drilling process is necessary to guarantee the success of jointed-pipe underbalanced drilling (UBD) operations� (more)
Perez-Tellez, Carlos
Counter-Rotating Tandem Motor Drilling System
Gas Technology Institute (GTI), in partnership with Dennis Tool Company (DTC), has worked to develop an advanced drill bit system to be used with microhole drilling assemblies. One of the main objectives of this project was to utilize new and existing coiled tubing and slimhole drilling technologies to develop Microhole Technology (MHT) so as to make significant reductions in the cost of E&P down to 5000 feet in wellbores as small as 3.5 inches in diameter. This new technology was developed to work toward the DOE's goal of enabling domestic shallow oil and gas wells to be drilled inexpensively compared to wells drilled utilizing conventional drilling practices. Overall drilling costs can be lowered by drilling a well as quickly as possible. For this reason, a high drilling rate of penetration is always desired. In general, high drilling rates of penetration (ROP) can be achieved by increasing the weight on bit and increasing the rotary speed of the bit. As the weight on bit is increased, the cutting inserts penetrate deeper into the rock, resulting in a deeper depth of cut. As the depth of cut increases, the amount of torque required to turn the bit also increases. The Counter-Rotating Tandem Motor Drilling System (CRTMDS) was planned to achieve high rate of penetration (ROP) resulting in the reduction of the drilling cost. The system includes two counter-rotating cutter systems to reduce or eliminate the reactive torque the drillpipe or coiled tubing must resist. This would allow the application of maximum weight-on-bit and rotational velocities that a coiled tubing drilling unit is capable of delivering. Several variations of the CRTDMS were designed, manufactured and tested. The original tests failed leading to design modifications. Two versions of the modified system were tested and showed that the concept is both positive and practical; however, the tests showed that for the system to be robust and durable, borehole diameter should be substantially larger than that of slim holes. As a result, the research team decided to complete the project, document the tested designs and seek further support for the concept outside of the DOE.
Kent Perry
Parallel Index and Query for Large Scale Data Analysis
Modern scientific datasets present numerous data management and analysis challenges. State-of-the-art index and query technologies are critical for facilitating interactive exploration of large datasets, but numerous challenges remain in terms of designing a system for process- ing general scientific datasets. The system needs to be able to run on distributed multi-core platforms, efficiently utilize underlying I/O infrastructure, and scale to massive datasets. We present FastQuery, a novel software framework that address these challenges. FastQuery utilizes a state-of-the-art index and query technology (FastBit) and is designed to process mas- sive datasets on modern supercomputing platforms. We apply FastQuery to processing of a massive 50TB dataset generated by a large scale accelerator modeling code. We demonstrate the scalability of the tool to 11,520 cores. Motivated by the scientific need to search for inter- esting particles in this dataset, we use our framework to reduce search time from hours to tens of seconds.
Chou, Jerry; Wu, Kesheng; Ruebel, Oliver; Howison, Mark; Qiang, Ji; Prabhat,; Austin, Brian; Bethel, E. Wes; Ryne, Rob D.; Shoshani, Arie
On concurrency control in sliding window queries over data streams
Work done while the author was visiting the University of Waterloo. Data stream systems execute a dynamic workload of long-running and one-time queries, with the streaming inputs typically bounded by sliding windows. For efficiency, windows may be advanced periodically by replacing the oldest part of the window with a batch of newly arrived data. Existing work on stream processing assumes that a window cannot be advanced while it is being accessed by a query. In this paper, we argue that concurrent processing of queries (reads) and window-slides (writes) is required by data stream systems in order to allow prioritized query scheduling and improve the freshness of answers. We prove that the traditional notion of conflict serializability is insufficient in this context and define stronger isolation levels that restrict the allowed serialization orders. We also design and experimentally evaluate a transaction scheduler that efficiently enforces the new isolation levels by taking advantage of the access patterns of sliding window queries. 1
Lukasz Golab; Kumar Gaurav Bijay; M. Tamer �zsu
Drilling operations at the Nevada Test Site
The Nevada Operations Office (NV) is responsible for supporting the nuclear test programs of the Los Alamos and Lawrence Livermore National Laboratories. This support includes the drilling of test holes for nuclear device testing a the Nevada Test Site (NTS). The purpose of this audit was to assess the effectiveness of the Department of Energy's management of test hole inventories at the NTS. Our audit disclosed that NV accumulated a large inventory of unused test holes and approved drilling additional holes for which neither laboratory (Los Alamos nor Livermore) had identified a need. The overdrilling of test holes occurred because NV did not comply with good inventory practices that would have had NV's approving official question the need for, and the timing of, the laboratories' drilling requests. Instead, NV gave perfunctory approval to the laboratories' work orders for drilling test holes, and emphasized keeping two drill rig crews busy and satisfying the laboratories' demands for dedicated drilling personnel. Although NV did not agree that overdrilling had occurred, it has cut back its drilling activities and estimated that this will save abut $7.6 million annually. NV agreed with the recommendations in the report and has taken corrective actions.
Development and testing of underbalanced drilling products
The first objective of this project is to develop a user-friendly, PC, foam drilling computer model, FOAM, which will accurately predict frictional pressure drops, cuttings lifting velocity, foam quality, and other drilling variables. The model will allow operating and service companies to accurately predict pressures and flow rates required at the surface and downhole to efficiently drill oil and gas wells with foam systems. The second objective of this project is to develop a lightweight drilling fluid that utilizes hollow glass spheres to reduce the density of the fluid and allow drilling underbalanced in low-pressure reservoirs. Since the resulting fluid will be incompressible, hydraulics calculations are greatly simplified, and expensive air compressors and booster pumps are eliminated. This lightweight fluid will also eliminate corrosion and downhole fire problems encountered with aerated fluids. Many tight-gas reservoirs in the US are attractive targets for underbalanced drilling because they are located in hard-rock country where tight, low-permeability formations compound the effect of formation damage encountered with conventional drilling fluids.
Maurer, W.; Medley, G. Jr.
Steamboat Hills exploratory slimhole: Drilling and testing
During July-September, 1993, Sandia National Laboratories, in cooperation with Far West Capital, drilled a 4000 feet exploratory slimhole (3.9 inch diameter) in the Steamboat Hills geothermal field near Reno, Nevada. This well was part of Sandia`s program to evaluate slimholes as a geothermal exploration tool. During and after drilling the authors performed four series of production and injection tests while taking downhole (pressure-temperature-spinner) and surface (wellhead pressure and temperature, flow rate) data. In addition to these measurements, the well`s data set includes: continuous core (with detailed log); borehole televiewer images of the wellbore`s upper 500 feet; daily drilling reports from Sandia and from drilling contractor personnel; daily drilling fluid record; numerous temperature logs; and comparative data from production and injection wells in the same field. This report contains: (1) a narrative account of the drilling and testing, (2) a description of equipment used, (3) a brief geologic description of the formation drilled, (4) a summary and preliminary interpretation of the data, and (5) recommendations for future work.
Finger, J.T.; Jacobson, F.D.; Hickox, C.E.; Eaton, R.R.
Formation damage in underbalanced drilling operations
Formation damage has long been recognized as a potential source of reduced productivity and injectivity in both horizontal and vertical wells. From the moment that the pay zone is being drilled until the well is put on production, a formation is exposed to a series of fluids and operations that can reduce its productive capacity. Any process that causes a loss in the productivity of an oil-, gas-, or water-saturated formation has a damaging effect on the reservoir. These damage mechanisms predominantly fall into three major classifications: mechanical, chemical, and biological. Underbalanced drilling operations involve drilling a portion of the wellbore at fluid pressures less than that of the target formation. This technology has been used to prevent or minimize problems associated with invasive formation damage, which often greatly reduces the productivity of oil and gas reservoirs, mainly in openhole horizontal-well applications. Underbalanced drilling is not a solution for all formation-damage problems. Damage caused by poorly designed and/or executed underbalanced drilling programs can equal or exceed that which may occur with a well-designed conventional overbalanced drilling program. Four techniques are currently available to achieve underbalanced conditions while drilling. These include using lightweight drilling fluids, injecting gas down the drillpipe, injecting gas into a parasite string, and using foam. This study provides an analysis of a number of potential damage mechanisms present when drilling underbalanced. It describes each one and its influence on the productivity of a well. Additionally it presents a general description of the different techniques that can be applied to carry out successful, cost-effective UBD operations, and discusses how these techniques may be used to reduce or eliminate formation damage.
Reyes Serpa, Carlos Alberto
Development and Testing of Insulated Drill Pipe
This project has comprised design, analysis, laboratory testing, and field testing of insulated drill pipe (IDP). This paper will briefly describe the earlier work, but will focus on results from the recently-completed field test in a geothermal well. Field test results are consistent with earlier analyses and laboratory tests, all of which support the conclusion that insulated drill pipe can have a very significant effect on circulating fluid temperatures. This will enable the use of downhole motors and steering tools in hot wells, and will reduce corrosion, deterioration of drilling fluids, and heat-induced failures in other downhole components.
Champness, T.; Finger, J.; Jacobson, R.
T-703: Cisco Unified Communications Manager Open Query Interface Lets
703: Cisco Unified Communications Manager Open Query Interface 703: Cisco Unified Communications Manager Open Query Interface Lets Remote Users Obtain Database Contents T-703: Cisco Unified Communications Manager Open Query Interface Lets Remote Users Obtain Database Contents August 26, 2011 - 3:45pm Addthis PROBLEM: A vulnerability was reported in Cisco Unified Communications Manager. A remote user can obtain database contents PLATFORM: Cisco Unified Communications Manager 6.x, 7.x, 8.0, 8.5 ABSTRACT: A remote user can obtain database contents, including authentication credentials. reference LINKS: SecurityTracker Alert ID: 1025971 Cisco Document ID: 113190 IMPACT ASSESSMENT: High Discussion: A vulnerability was reported in Cisco Unified Communications Manager. A remote user can obtain database contents. A remote user can access an open
Effective Graph Clustering for Path Queries in Digital Map Databases
In this paper, we present an experimental evaluation of graph clustering strategies in terms of their effectiveness in optimizing I/O for path query processing in digital map databases. Clustering optimization is attractive because it does not incurs any run-time cost, and is complimentary to many of the existing techniques in path query optimization. We first propose a novel graph clustering technique, called Spatial Partition Clustering (SPC), that creates balanced partitions of links based on the spatial proximity of their origin nodes. We then select three alternative clustering techniques from the literature, namely two-way partitioning, approximately topological clustering, and random clustering, to compare their performance in path query processing with SPC. Experimental evaluation indicates that our SPC performs the best for the high-locality graphs (such as GIS maps), whereas the two-way partitioning approach performs the best for no-locality random graphs. 1 Introduction 1....
Yun-Wu Huang; Ning Jing; Elke A. Rundensteiner
Optimal query/update tradeoffs in versioned dictionaries
External-memory dictionaries are a fundamental data structure in file systems and databases. Versioned (or fully-persistent) dictionaries have an associated version tree where queries can be performed at any version, updates can be performed on leaf versions, and any version can be `cloned' by adding a child. Various query/update tradeoffs are known for unversioned dictionaries, many of them with matching upper and lower bounds. No fully-versioned external-memory dictionaries are known with optimal space/query/update tradeoffs. In particular, no versioned constructions are known that offer updates in $o(1)$ I/Os using O(N) space. We present the first cache-oblivious and cache-aware constructions that achieve a wide range of optimal points on this tradeoff.
Byde, Andrew
The goal of the project has been to develop new types of drill-in fluids (DIFs) and completion fluids (CFs) for use in natural gas reservoirs. Phase 1 of the project was a 24-month study to develop the concept of advanced type of fluids usable in well completions. Phase 1 tested this concept and created a kinetic mathematical model to accurately track the fluid's behavior under downhole conditions. Phase 2 includes tests of the new materials and practices. Work includes the preparation of new materials and the deployment of the new fluids and new practices to the field. The project addresses the special problem of formation damage issues related to the use of CFs and DIFs in open hole horizontal well completions. The concept of a ''removable filtercake'' has, as its basis, a mechanism to initiate or trigger the removal process. Our approach to developing such a mechanism is to identify the components of the filtercake and measure the change in the characteristics of these components when certain cleanup (filtercake removal) techniques are employed.
David B. Burnett
Test report for core drilling ignitability testing
Testing was carried out with the cooperation of Westinghouse Hanford Company and the United States Bureau of Mines at the Pittsburgh Research Center in Pennsylvania under the Memorandum of Agreement 14- 09-0050-3666. Several core drilling equipment items, specifically those which can come in contact with flammable gasses while drilling into some waste tanks, were tested under conditions similar to actual field sampling conditions. Rotary drilling against steel and rock as well as drop testing of several different pieces of equipment in a flammable gas environment were the specific items addressed. The test items completed either caused no ignition of the gas mixture, or, after having hardware changes or drilling parameters modified, produced no ignition in repeat testing.
Witwer, K.S.
Investigation of percussion drills for geothermal applications
A series of tests was conducted to provide data for an economic evaluation of percussion drilling in geothermal reservoirs. Penetration rate, operation on aqueous foam, and high temperature vulnerabilities of downhole percussion tools are described.
Offshore Drilling Safety and Response Technologies | Department...
Production increases are anticipated to come from onshore enhanced oil recovery projects, shale oil plays, and deepwater drilling in the Gulf of Mexico. They also project that U.S....
/Canada/Chinese Taipei/Korea Consortium for Ocean Drilling Deutsche Forschungsgemeinschaft (Federal Republic of Germany Cypionka Microbiologist Institut für Chemie und Biologie Des Meeres (ICBM) Carl von Ossietzky Universität
by the following agencies: Australia/Canada/Chinese Taipei/Korea Consortium for Ocean Drilling Deutsche.edu Marcel Regelous Petrologist Abteilung Geochemie Max-Planck-Institüt für Chemie Johannes J-Becherweg 27
/Canada/Chinese Taipei/Korea Consortium for Ocean Drilling Deutsche Forschungsgemeinschaft (Federal Republic of Germany Geochemist Institut für Chemie und Biologie des Meeres (ICBM) Carl von Ossietzky Universität Oldenburg
Underbalanced drilling benefits now available offshore
Offshore underbalanced drilling (UBD) is a reality. Applications in older, partially depleted fields and new fields are being considered. However, low productivity reservoirs and fields with sub normal pressures causing drilling problems are currently the main targets for offshore UBD. With proper planning and the correct technique, both jointed pipe and coiled tubing UBD drilling operations have been carried out offshore with success. The main concerns for offshore UBD have been altered drilling practices and surface production system operation. These issues have been examined and equipment has been designed and tested to address them. Environmental, safety and health issues are paramount and have been studied carefully. Detailed well planning, engineering, and flow modeling have proven critical for successful offshore UBD operations. Examples are given from oil and gas fields.
Vozniak, J.P.; Cuthbertson, B.; Nessa, D.O.
Field results document underbalanced drilling success
Many different techniques are used to maintain underbalanced conditions at the toolface. Whether the operator is trying to avoid drilling problems or prevent formation damage, the key to a safe, successful operation is a reliable method of sealing around the tubulars at the surface for continuous well control. Globally, underbalanced drilling (UBD) is emerging as an important technology to improve production and solve drilling problems with success in many applications with different reservoirs. Improvements in initial flow rates using UBD are being supported by longer term production. UBD techniques and processes are improving through experience and implementation. UBD is becoming a more economical means to optimize reservoir management than conventional overbalanced operations. UBD operations are proving to be safer than conventional overbalanced drilling.
Vozniak, J.; Cuthbertson, R.L.
April 25, 1997: Yucca Mountain exploratory drilling
Energy.gov (U.S. Department of Energy (DOE))
April 25, 1997Workers complete drilling of the five-mile long, horseshoe-shaped exploratory tunnel through Yucca Mountain at the proposed high-level nuclear waste repository in Nevada.
Challenges of deep drilling. Part 2
This installment delineates current deep drilling technology limitations and discusses needed advances for the future. Problem areas are identified as material and seal problems in wellhead equipment, new fluid carriers for well stimulation, quality control/inspection/testing for equipment and performance flaws, arctic environment conditions, and experienced personnel. The main factors of operating environment that challenge advanced deep drilling are identified as temperature extremes, pressure extremes, acid gases, and deep-water presence.
Designing BHAs for better drilling jar performance
Jars are a major component in drill string design, but considerations for proper placement often are neglected. The main purpose of running drilling jars is to provide an immediate jarring action when pipe becomes stuck. This report considers some of the mechanics of pipe sticking and why it must be considered in jar placement. It also focuses on their placement in the bottomhole assembly and the advantages of certain types of jars.
Schmid, J.T.
OCEAN DRILLING PROGRAM LEG 155 SCIENTIFIC PROSPECTUS AMAZON DEEP-SEA FAN Dr. Roger D. Flood Co of Canada P.O. Box 1006 Dartmouth, Nova Scotia Canada B2Y4A2 Dr. Adam Klaus Staff Scientist, Leg l55 Ocean and handling. D I S C L A I M E R This publication was prepared by the Ocean Drilling Program, Texas A
Study on an Electric Drilling Rig with Hydraulic Energy Storage
An electric drilling rig with hydraulic energy storage is researched. This rig can recover the potential energy of the drill stem lowered and owns remarkable energy-saving effect. The mathematical model of the new rig lifting the drill stem was deduced ... Keywords: electric drilling rig, energy-recovering, energy-saving
Zhang Lujun
Ocean Drilling Program Texas A&M University
/small diameter drill collars/connections capable of surviving rotation above the seafloor without lateral support
Portable top drive cuts horizontal drilling costs
Economic analysis of a seven-well, long-reach horizontal drilling program into an unconsolidated, heavy-oil-bearing reservoir in Winter field near the Alberta/Saskatchewan border in Canada reveals that -- in the right application -- renting a portable top drive drilling system can reduce total drilling costs. Use of the portable top drive combined with other cost-saving measures enabled Saskoil, one of Canada`s larger independents, to drill more cheaply, on a cost-per-meter basis, in 1993 than in 1992. This was despite significant rental rates for drilling rigs and directional drilling services caused by increased demand in Western Canada. Total cost savings of 10% on wells that would otherwise cost in the (C) $500,000 range are believed realistic. Based on this year`s performance, Saskoil recommends top drive for the company`s future horizontal wells in this area. This article describes the operator`s horizontal well program, advantages of top drive in that program and how it was installed and applied. Estimated time savings for six wells, plus other ways top drive can cut costs and improve operations are discussed.
Jackson, B. [Saskoil, Regina, Saskatchewan (Canada); Yager, D. [Tesco Drilling Tech., Calgary, Alberta (Canada)
Impedance matched joined drill pipe for improved acoustic transmission
An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.
Moss, William C. (San Mateo, CA)
Optimizing RDF(S) queries on cloud platforms
Scalable processing of Semantic Web queries has become a critical need given the rapid upward trend in availability of Semantic Web data. The MapReduce paradigm is emerging as a platform of choice for large scale data processing and analytics due to ... Keywords: hadoop, mapreduce, rdf(s), sparql
HyeongSik Kim, Padmashree Ravindra, Kemafor Anyanwu
Query-Independent learning to rank for RDF entity search
The amount of structured data is growing rapidly. Given a structured query that asks for some entities, the number of matching candidate results is often very high. The problem of ranking these results has gained attention. Because results in ... Keywords: information retrieval, learning to rank, semantic search
Lorand Dali; Bla� Fortuna; Thanh Tran Duc; Dunja Mladeni?
Federated Querying Architecture with Clinical & Translational Health IT Application
We present a software architecture that federates data from multiple heterogeneous health informatics data sources owned by multiple organizations. The architecture builds upon state-of-the-art open-source Java and XML frameworks in innovative ways. ... Keywords: Clinical and translational health informatics, Federated query, Heterogeneous data sources, OSGi enterprise service bus, Web services
Oren E. Livne; N. Dustin Schultz; Scott P. Narus
Towards the taxonomy-oriented categorization of yellow pages queries
Yellow pages search is a popular service that provides a means for finding businesses close to particular locations. The efficient search of yellow pages is becoming a rapidly evolving research area. The underlying data maintained in yellow pages search ... Keywords: Yellow pages query categorization, category filter, category mapping function, flexible framework
Zhisheng Li; Xiangye Xiao; Meng Wang; Chong Wang; Xufa Wang; Xing Xie
Mining Query Logs: Turning Search Usage Data into Knowledge
Web search engines have stored in their logs information about users since they started to operate. This information often serves many purposes. The primary focus of this survey is on introducing to the discipline of query mining by showing its foundations ...
Fabrizio Silvestri
Scalable in situ scientific data encoding for analytical query processing
The process of scientific data analysis in high-performance computing environments has been evolving along with the advancement of computing capabilities. With the onset of exascale computing, the increasing gap between compute performance and I/O bandwidth ... Keywords: compression, exascale computing, indexing, query processing
Sriram Lakshminarasimhan; David A. Boyuka; Saurabh V. Pendse; Xiaocheng Zou; John Jenkins; Venkatram Vishwanath; Michael E. Papka; Nagiza F. Samatova
Query and Predicate Emptiness in Description Logics Franz Baader
for basic members of the ALC family to un- decidable for ALC extended with functional roles (ALCF). Note for ALCF, which should be contrasted with the decidability of query entailment and containment in this DL with and without the UNA. An analogous statement fails for ALCF, e.g. because the ABox A = {f(a, b), f(a, b )}, f
Wolter, Frank
Layered Models Top-Down Querying of Normal Logic Programs
For practical applications, the use of top-down query-driven proof-procedures is essential for an efficient use and computation of answers using Logic Programs as knowledge bases. Additionally, abductive reasoning on demand is intrinsically a top-down ... Keywords: Relevance, Semantics, Smodels, XSB-XASP
Lu�s Moniz Pereira; Alexandre Miguel Pinto
Data sampling control, compression and query in sensor networks
Nodes in wireless sensor networks have very limited storage capacity, computing ability and battery power. Node failure and communication link disconnection occur frequently, which means weak services of the network layer. Sensed data is inaccurate which ... Keywords: data accuracy, data compression, data sampling, energy efficiency, power limitation, query, sampling frequency control, sensor networks
Jinbao Li; Jianzhong Li
CQ-Buddy: Harnessing Peers For Distributed Continuous Query Processing
In this paper, we present the design and evaluation of CQ-Buddy, a peer-to-peer (p2p) continuous query (CQ) processing system that is distributed, and highly-scalable. CQ-Buddy exploits the differences in capabilities ...
Ng, Wee Siong
Accelerating Network Traffic Analytics Using Query-DrivenVisualization
Realizing operational analytics solutions where large and complex data must be analyzed in a time-critical fashion entails integrating many different types of technology. This paper focuses on an interdisciplinary combination of scientific data management and visualization/analysis technologies targeted at reducing the time required for data filtering, querying, hypothesis testing and knowledge discovery in the domain of network connection data analysis. We show that use of compressed bitmap indexing can quickly answer queries in an interactive visual data analysis application, and compare its performance with two alternatives for serial and parallel filtering/querying on 2.5 billion records worth of network connection data collected over a period of 42 weeks. Our approach to visual network connection data exploration centers on two primary factors: interactive ad-hoc and multiresolution query formulation and execution over n dimensions and visual display of then-dimensional histogram results. This combination is applied in a case study to detect a distributed network scan and to then identify the set of remote hosts participating in the attack. Our approach is sufficiently general to be applied to a diverse set of data understanding problems as well as used in conjunction with a diverse set of analysis and visualization tools.
Bethel, E. Wes; Campbell, Scott; Dart, Eli; Stockinger, Kurt; Wu,Kesheng
Secure quantum private information retrieval using phase-encoded queries
We propose a quantum solution to the classical private information retrieval (PIR) problem, which allows one to query a database in a private manner. The protocol offers privacy thresholds and allows the user to obtain information from a database in a way that offers the potential adversary, in this model the database owner, no possibility of deterministically establishing the query contents. This protocol may also be viewed as a solution to the symmetrically private information retrieval problem in that it can offer database security (inability for a querying user to steal its contents). Compared to classical solutions, the protocol offers substantial improvement in terms of communication complexity. In comparison with the recent quantum private queries [Phys. Rev. Lett. 100, 230502 (2008)] protocol, it is more efficient in terms of communication complexity and the number of rounds, while offering a clear privacy parameter. We discuss the security of the protocol and analyze its strengths and conclude that using this technique makes it challenging to obtain the unconditional (in the information-theoretic sense) privacy degree; nevertheless, in addition to being simple, the protocol still offers a privacy level. The oracle used in the protocol is inspired both by the classical computational PIR solutions as well as the Deutsch-Jozsa oracle.
Olejnik, Lukasz [CERN, 1211 Geneva 23, Switzerland and Poznan Supercomputing and Networking Center, Noskowskiego 12/14, PL-61-704 Poznan (Poland)
Mining web query logs to analyze political issues
We present a novel approach to using anonymized web search query logs to analyze and visualize political issues. Our starting point is a list of politically annotated blogs (left vs. right). We use this list to assign a numerical political leaning to ... Keywords: opinion mining and sentiment analysis, partisanship, political leaning, web search logs
Ingmar Weber; Venkata Rama Kiran Garimella; Erik Borra
Intl. Conf. on Information and Knowledge Management, pages 490--499, Washington, DC, 1993. [11] J 214--221, Washington, DC, 1993. [13] G. Proietti and C. Faloutsos. Accurate modeling of region dataSelectivity Estimation of Window Queries for Line Segment Datasets Guido Proietti 1 Christos
Maximizing Throughput for Queries over Streaming Sensor Data
of Computer Science The George Washington University Washington, DC, USA Email: {joegomes throughput for sliding window based multi-join queries over con- tinuous sensor data streams. We develop joining two unbounded streams. Therefore it is more sensible and useful to impose window predicates
Choi, Hyeong-Ah
Database design and querying within the fuzzy semantic model
Fuzzy semantic model (FSM) is a data model that uses basic concepts of semantic modeling and supports handling fuzziness, uncertainty and imprecision of real-world at the attribute, entity and class levels. The paper presents the principles and constructs ... Keywords: Database design, Flexible querying, Fuzzy database, Semantic modeling
Rafik Bouaziz; Salem Chakhar; Vincent Mousseau; Sudha Ram; Abdelkader Telmoudi
DATA CONCERN AWARE QUERYING FOR THE INTEGRATION OF DATA SERVICES Muhammad Intizar Ali, Reinhard,firstname.lastname@example.com Keywords: Data Services, Database as a Service, Data Services Integration, Data Concerns, XQuery. Abstract: There is an increasing trend for organizations to publish data over the web using data services. The published data
Dustdar, Schahram
Integrating implicit answers with object-oriented queries
Queries in object-oriented datab;Lqcs are formulated against a class and retrieve instnnccls of the class sat,is-fying a certain predicate on the att,riblltes of the class. The presence of a class hierarchy, an integral part of any object-oriented data model, allows answers to be expressed implicitly in terms of classes and instances. This enables answers to be provided at different levels of abstraction. Shum and Muntz [SM88] presented a way of providing implicit expressions based on a taxonomy defined over the database. The algorithm presented in [SM88] is optimal in the length of the answer but the clarity of the answer is often poor. In this paper, the fo-cus is on coherent answers: implicit answers that are not necessarily optimal in the number of terms but are easy to comprehend. We show that a uniqlle coherent answer can be obtained efficiently in a top down nlanncr. Since the objective is to provide cohcrcnt, answers, and user queries are formulated by means of query operators to access the database, the standard query operators are redefined to obtain and manipulate coherent answers. Coherent answers are useful in coping with information complexity as they allow answers to be represented ab-stractly and are also a useful rctprescntation tool for complex information systems. 1
Hava T. Siegelmann
Gas Technology Institute (GTI) has been the leading investigator in the field of high power laser applications research for well construction and completion applications. Since 1997, GTI (then as Gas Research Institute) has investigated several military and industrial laser systems and their ability to cut and drill into reservoir type rocks. In this report, GTI continues its investigation with a recently acquired 5.34 kW ytterbium-doped multi-clad high power fiber laser (HPFL). The HPFL represents a potentially disruptive technology that, when compared to its competitors, is more cost effective to operate, capable of remote operations, and requires considerably less maintenance and repair. To determine how this promising laser would perform under high pressure in-situ conditions, GTI performed a number of experiments with results directly comparable to previous data. Experiments were designed to investigate the effect of laser input parameters on representative reservoir rock types of sandstone and limestone. The focus of the experiments was on completion and perforation applications, although the results and techniques apply to well construction and other rock cutting applications. All previous laser/rock interaction tests were performed on samples in the lab at atmospheric pressure. To determine the effect of downhole pressure conditions, a sophisticated tri-axial cell was designed and tested. For the first time, Berea sandstone, limestone and clad core samples were lased under various combinations of confining, axial and pore pressures. Composite core samples consisted of steel cemented to rock in an effort to represent material penetrated in a cased hole. The results of this experiment will assist in the development of a downhole laser perforation prototype tool. In the past, several combinations of laser and rock variables were investigated at standard conditions and reported in the literature. More recent experiments determined the technical feasibility of laser perforation on multiple samples of rock, cement and steel. The fiber laser was capable of penetrating these materials under a variety of conditions, to an appropriate depth, and with reasonable energy requirements. It was determined that fiber lasers are capable of cutting rock without causing damage to flow properties. Furthermore, the laser perforation resulted in permeability improvements on the exposed rock surface. This report discusses the design and development of a customized laser pressure cell; experimental design and procedures, and the resulting data on pressure-charged samples exposed to the laser beam. An analysis provides the resulting effect of downhole pressure conditions on the laser/rock interaction process.
Use of Downhole Motors in Geothermal Drilling in the Philippines
This paper describes the use of downhole motors in the Tiwi geothermal field in the Philippines, The discussion includes the application Of a Dyna-Drill with insert-type bits for drilling through surface alluvium. The economics of this type of drilling are compared to those of conventional rotary drilling. The paper also describes the use of a turbodrill that drills out scale as the well produces geothermal fluids.
Pyle, D. E.
Towards a characterization of order-invariant queries over tame structures
This work deals with the expressive power of logics on finite structures with access to an additional �arbitrary� linear order. The queries that can be expressed this way are the order-invariant queries for the logic. For the standard ...
Michael Benedikt; Luc Segoufin
Benefits of path summaries in an XML query optimizer supporting multiple access methods
We compare several optimization strategies implemented in an XML query evaluation system. The strategies incorporate the use of path summaries into the query optimizer, and rely on heuristics that exploit data statistics.We present experimental results ...
Attila Barta; Mariano P. Consens; Alberto O. Mendelzon
Natural Gas EIA-176 Query System Readme - U.S. Energy ...
EIA-176 Query System Readme 1.0 INTRODUCTION TO THE EIA-176 FRONT END QUERY FACILITY This system provides a method of extracting and using the EIA-176 data, and ...
Efficient Range and Join Query Processing in Massively Distributed Peer-to-Peer Networks.
??Peer-to-peer (P2P) has become a modern distributed computing architecture that supports massively large-scale data management and query processing. Complex query operators such as range operator� (more)
Wang, Qiang
Drilling costs drop 7% in 1985
Drilling costs dropped about 7% last year. This decline cancels a slight increase in 1984. Total costs to drill now run about 59% of the 1981 highs. Comparable figures for the previous 2 years are 63 and 61%. Deeper wells showed the biggest drops. Shallow well costs fell about 6%. Energy Information Administration (EIA) indexes drilling costs on a 1976 base year. Costs for shallow wells (5,000 ft or less) show an index about 138. Deeper wells have an index around 149. Cost declines were the greatest in West and North Texas and the Rockies, of 11%. The Northeast and Western areas showed greater than average declines, 9% or so. The High Plains, New Mexico, and Midcontinent areas recorded near the average 7% decline. Costs in South Louisiana, the Southeast, and Ark-La-Tex 2%. West Central Texas costs were off only 1%. The Southeast was essentially unchanged. Indexes by area show generally that drilling costs have declined since 1983. The summary here comes from EIA's ''Indexes and Estimates of Domestic Well Drilling Costs 1984 and 1985''. That report covers oil, gas, and dry hole costs, cost components, and overall costs.
Anderson, T.; Funk, V.
Deep drilling technology for hot crystalline rock
The development of Hot Dry Rock (HDR) geothermal systems at the Fenton Hill, New Mexico site has required the drilling of four deep boreholes into hot, Precambrian granitic and metamorphic rocks. Thermal gradient holes, four observation wells 200 m (600 ft) deep, and an exploration core hole 800 m (2400 ft) deep guided the siting of the four deep boreholes. Results derived from the exploration core hole, GT-1 (Granite Test No. 1), were especially important in providing core from the granitic rock, and establishing the conductive thermal gradient and heat flow for the granitic basement rocks. Essential stratigraphic data and lost drilling-fluid zones were identified for the volcanic and sedimentary rocks above the contact with the crystalline basement. Using this information drilling strategies and well designs were then devised for the planning of the deeper wells. The four deep wells were drilled in pairs, the shallowest were planned and drilled to depths of 3 km in 1975 at a bottom-hole temperature of nearly 200/sup 0/C. These boreholes were followed by a pair of wells, completed in 1981, the deepest of which penetrated the Precambrian basement to a vertical depth of 4.39 km at a temperature of 320/sup 0/C.
Rowley, J.C.
Method and apparatus of assessing down-hole drilling conditions
A method and apparatus for use in assessing down-hole drilling conditions are disclosed. The apparatus includes a drill string, a plurality of sensors, a computing device, and a down-hole network. The sensors are distributed along the length of the drill string and are capable of sensing localized down-hole conditions while drilling. The computing device is coupled to at least one sensor of the plurality of sensors. The data is transmitted from the sensors to the computing device over the down-hole network. The computing device analyzes data output by the sensors and representative of the sensed localized conditions to assess the down-hole drilling conditions. The method includes sensing localized drilling conditions at a plurality of points distributed along the length of a drill string during drilling operations; transmitting data representative of the sensed localized conditions to a predetermined location; and analyzing the transmitted data to assess the down-hole drilling conditions.
Hall, David R. (Provo, UT); Pixton, David S. (Lehl, UT); Johnson, Monte L. (Orem, UT); Bartholomew, David B. (Springville, UT); Fox, Joe (Spanish Fork, UT)
Energy and quality aware query processing in wireless sensor database systems
Query processing has been studied extensively in traditional database systems. However, few existing methods can be directly applied to wireless sensor database systems (WSDSs) due to their characteristics, such as decentralized nature, limited computational ... Keywords: Energy reservation, Energy-efficiency, Imagine chain, Multipath routing, Query optimization, Query processing, Space vector model, Wireless sensor database system, k-Partial cover set problem
Qingchun Ren; Qilian Liang
Analysis of multiple query reformulations on the web: The interactive information retrieval context
This study examines the facets and patterns of multiple Web query reformulations with a focus on reformulation sequences. Based on IR interaction models, it was presumed that query reformulation is the product of the interaction between the user and ... Keywords: Interactive information retrieval, Query reformulation, Web search engine, Web searching
Soo Young Rieh; Hong (Iris) Xie
Blind chance: on potential trust friends query in mobile social networks
Potential-Trust-Friends-Query is an important query in mobile social network, as it enables users to discover and interact with others happen to be in their physical vicinity. In our context, we attempt to find top-k mobile users for such query. ... Keywords: check-in history, mobile social network, potential friends, trust
Jinzeng Zhang, Xiaofeng Meng
Efficient processing of multiple continuous skyline queries over a data stream
Given a set of data objects, the skyline query returns the objects that are not dominated by others. Although skyline computation has been studied extensively for static data, there has been relatively less work on data streams. Recently, a few methods ... Keywords: Continuous query, Data stream, Multiple skyline query
Yu Won Lee; Ki Yong Lee; Myoung Ho Kim
Semantics and implementation of continuous sliding window queries over data streams
In recent years the processing of continuous queries over potentially infinite data streams has attracted a lot of research attention. We observed that the majority of work addresses individual stream operations and system-related issues rather than ... Keywords: Semantics, continuous queries, data streams, query optimization
J�rgen Kr�mer; Bernhard Seeger
A Query-based Pre-retrieval Model Selection Approach to Information Retrieval
A Query-based Pre-retrieval Model Selection Approach to Information Retrieval Ben He and Iadh Ounis to the same cluster. 1 Introduction An information retrieval (IR) system receives a query from the firstname.lastname@example.com Abstract In this paper, we propose a query-based pre-retrieval approach to the model selection problem
Jose, Joemon M.
Applying Heuristics to Improve A Genetic Query Optimisation Process in Information Retrieval
Applying Heuristics to Improve A Genetic Query Optimisation Process in Information Retrieval firstname.lastname@example.com Abstract This work presents a genetic approach for query optimisation in information retrieval the genetic exploration process to the information retrieval task. Experiments with AP documents and queries
Dependency-aware reordering for parallelizing query optimization in multi-core CPUs
The state of the art commercial query optimizers employ cost-based optimization and exploit dynamic programming (DP) to find the optimal query execution plan (QEP) without evaluating redundant sub-plans. The number of alternative QEPs ... Keywords: multi-cores, parallel databases, query optimization
Wook-Shin Han; Jinsoo Lee
"I know what you did last summer": query logs and user privacy
We investigate the subtle cues to user identity that may be exploited in attacks on the privacy of users in web search query logs. We study the application of simple classifiers to map a sequence of queries into the gender, age, and location of the user ... Keywords: k-anonymity, privacy, query log analysis
Rosie Jones; Ravi Kumar; Bo Pang; Andrew Tomkins
Efficient discrete-time simulations of continuous-time quantum query algorithms
The continuous-time query model is a variant of the discrete query model in which queries can be interleaved with known operations (called "driving operations") continuously in time. Interesting algorithms have been discovered in this model, such as an algorithm for evaluating nand trees more efficiently than any classical algorithm. Subsequent work has shown that there also exists an efficient algorithm for nand trees in the discrete query model; however, there is no efficient conversion known for continuous-time query algorithms for arbitrary problems. We show that any quantum algorithm in the continuous-time query model whose total query time is T can be simulated by a quantum algorithm in the discrete query model that makes O[T log(T) / log(log(T))] queries. This is the first upper bound that is independent of the driving operations (i.e., it holds even if the norm of the driving Hamiltonian is very large). A corollary is that any lower bound of T queries for a problem in the discrete-time query model immediately carries over to a lower bound of \\Omega[T log(log(T))/log (T)] in the continuous-time query model.
R. Cleve; D. Gottesman; M. Mosca; R. D. Somma; D. L. Yonge-Mallo
Evaluation of a flowchart-based EHR query system: A case study of RetroGuide
Provision of query systems which are intuitive for non-experts has been recognized as an important informatics challenge. We developed a prototype of a flowchart-based analytical framework called RetroGuide that enables non-experts to formulate query ... Keywords: Biomedical informatics, Data warehouse, Evaluation, Informatics, Mixed-method, Query system, RetroGuide, SQL
Vojtech Huser; Scott P. Narus; Roberto A. Rocha
Ontology-driven relational query formulation using the semantic and assertional capabilities of OWL-DL
This work investigates the extent to which domain knowledge, expressed in a domain ontology, can assist end-users in formulating relational queries that can be executed over a complex relational database. In this regard, an ontology-driven query formulation ... Keywords: Data retrieval, Domain knowledge, Information systems, Ontology, Query formulation
K. Munir; M. Odeh; R. Mcclatchey
A safe-exit approach for efficient network-based moving range queries
Query processing on road networks has been extensively studied in recent years. However, the processing of moving queries on road networks has received little attention. This paper studies the efficient processing of moving range queries on road networks. ... Keywords: Spatial, Temporal databases
Duncan Yung; Man Lung Yiu; Eric Lo
An Energy Efficient Path Finding Query Protocol in Wireless Sensor Networks
In many applications, the query mechanism would co-exist with the data collection at the same time. If these two mechanisms can be combined, the query could utilize some information from the data collection and get benefits on the robustness and stability. ... Keywords: Query, Data Collection, Sharing, Distributed, Self-adapting, CTP
Zhiqi Wang; Liang Chen; Zusheng Zhang; Fengqi Yu
Automatic Reformulation of Children's Search Queries Maarten van Kalsbeek, Joost de Wit, Dolf Trieschnigg,
Terms Algorithms, Human Factors, Design Keywords Automatic Query Expansion, Search Behavior, 1 children may make. Most of the search engines offer only the possibility to enter a Boolean queryAutomatic Reformulation of Children's Search Queries Maarten van Kalsbeek, Joost de Wit, Dolf
Hiemstra, Djoerd
On efficiently processing nearest neighbor queries in a loosely coupled set of data sources
We propose a family of algorithms for processing nearest neighbor (NN) queries in an integration middleware that provides federated access to numerous loosely coupled, autonomous data sources connected through the internet. Previous approaches for parallel ... Keywords: data integration, distributed query processing, federated database system, kNN, nearest neighbors, parallel query processing
Thomas Schwarz; Markus Iofcea; Matthias Grossmann; Nicola H�nle; Daniela Nicklas; Bernhard Mitschang
Directional Drilling Systems | Open Energy Information
Directional Drilling Systems Directional Drilling Systems Jump to: navigation, search Geothermal ARRA Funded Projects for Directional Drilling Systems Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":14,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"
Method for laser drilling subterranean earth formations
Laser drilling of subterranean earth formations is efficiently accomplished by directing a collimated laser beam into a bore hole in registry with the earth formation and transversely directing the laser beam into the earth formation with a suitable reflector. In accordance with the present invention, the bore hole is highly pressurized with a gas so that as the laser beam penetrates the earth formation the high pressure gas forces the fluids resulting from the drilling operation into fissures and pores surrounding the laser-drilled bore so as to inhibit deleterious occlusion of the laser beam. Also, the laser beam may be dynamically programmed with some time dependent wave form, e.g., pulsed, to thermally shock the earth formation for forming or enlarging fluid-receiving fissures in the bore.
Shuck, Lowell Z. (Morgantown, WV)
Data transmission element for downhole drilling components
A robust data transmission element for transmitting information between downhole components, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks, mud, fluids, lubricants, and the like. The data transmission element components include a generally U-shaped annular housing, a generally U-shaped magnetically conductive, electrically insulating element such as ferrite, and an insulated conductor. Features on the magnetically conducting, electrically insulating element and the annular housing create a pocket when assembled. The data transmission element is filled with a polymer to retain the components within the annular housing by filling the pocket with the polymer. The polymer can bond with the annular housing and the insulated conductor but preferably not the magnetically conductive, electrically insulating element. A data transmission element is mounted within a recess proximate a mating surface of a downhole drilling component, such as a section of drill pipe.
Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT)
Drilling in 2000 taps technology explosion
While major oil and gas companies all but ended research and development programs, the burden for technological advancement fell to service companies. And service companies allotted their R and D investment to activities whose return they could fairly predict. But even as cost-cutting measured devastated engineering staffs, a profit-growth strategy was forming that understood that profit could be enhanced by not just cutting the per barrel cost to producers but by producing more barrels per investment dollar. In other words, get more oil and gas from the same well through applied drilling and production technology. In the drilling industry all things technical revolve around six areas of expertise: bits, rotation systems, tripping systems, control systems, information systems and direction drilling systems. The paper discusses these six technologies.
Public Support for Oil and Gas Drilling in California's Forests and Parks
email@example.com Abstract: Offshore oil drilling hasto attitudes toward offshore oil drilling. This implies thats Forests and Parks 1 Offshore oil drilling has been a
Smith, Eric R.A.N.; Carlisle, Juliet; Michaud, Kristy
Independent Statistics & Analysis Drilling Productivity Report
Independent Statistics & Analysis Independent Statistics & Analysis Drilling Productivity Report The six regions analyzed in this report accounted for nearly 90% of domestic oil production growth and virtually all domestic natural gas production growth during 2011-12. December 2013 For key tight oil and shale gas regions U.S. Energy Information Administration Contents Year-over-year summary 2 Bakken 3 Eagle Ford 4 Haynesville 5 Marcellus 6 Niobrara 7 Permian 8 Explanatory notes 9 Sources 10 Bakken Marcellus Niobrara Haynesville Eagle Ford Permian U. S. Energy Information Administration | Drilling Productivity Report 0 400 800 1,200 1,600 2,000 Bakken Eagle Ford Haynesville
Geothermal wells: a forecast of drilling activity
Numbers and problems for geothermal wells expected to be drilled in the United States between 1981 and 2000 AD are forecasted. The 3800 wells forecasted for major electric power projects (totaling 6 GWe of capacity) are categorized by type (production, etc.), and by location (The Geysers, etc.). 6000 wells are forecasted for direct heat projects (totaling 0.02 Quads per year). Equations are developed for forecasting the number of wells, and data is presented. Drilling and completion problems in The Geysers, The Imperial Valley, Roosevelt Hot Springs, the Valles Caldera, northern Nevada, Klamath Falls, Reno, Alaska, and Pagosa Springs are discussed. Likely areas for near term direct heat projects are identified.
Brown, G.L.; Mansure, A.J.; Miewald, J.N.
New surface equipment for underbalanced drilling
Perhaps the single most exciting development in the area of new drilling technology in this decade is underbalanced drilling (UBD). This category includes both jointed pipe and coiled tubing applications. Each has advantages and disadvantages in UBD operations. Regardless of the method selected for a particular UBD application, equipment similarities exist. The surface control and production equipment must be correctly sized and designed for the overall total UBD engineering solution. This article describes the various types, applications and purposes of special surface equipment needed in underbalanced operations. This is the second in a series of articles on UBD technology and its rapid development is this field.
Cuthbertson, R.L.; Vozniak, J.; Kinder, J.
FastQuery: A Parallel Indexing System for Scientific Data
Modern scientific datasets present numerous data management and analysis challenges. State-of-the- art index and query technologies such as FastBit can significantly improve accesses to these datasets by augmenting the user data with indexes and other secondary information. However, a challenge is that the indexes assume the relational data model but the scientific data generally follows the array data model. To match the two data models, we design a generic mapping mechanism and implement an efficient input and output interface for reading and writing the data and their corresponding indexes. To take advantage of the emerging many-core architectures, we also develop a parallel strategy for indexing using threading technology. This approach complements our on-going MPI-based parallelization efforts. We demonstrate the flexibility of our software by applying it to two of the most commonly used scientific data formats, HDF5 and NetCDF. We present two case studies using data from a particle accelerator model and a global climate model. We also conducted a detailed performance study using these scientific datasets. The results show that FastQuery speeds up the query time by a factor of 2.5x to 50x, and it reduces the indexing time by a factor of 16 on 24 cores.
Chou, Jerry; Wu, Kesheng; Prabhat,
The Framework for Approximate Queries on Simulation Data
AQSim is a system intended to enable scientists to query and analyze a large volume of scientific simulation data. The system uses the state of the art in approximate query processing techniques to build a novel framework for progressive data analysis. These techniques are used to define a multi-resolution index, where each node contains multiple models of the data. The benefits of these models are two-fold: (1) they are compact representations, reconstructing only the information relevant to the analysis, and (2) the variety of models capture different aspects of the data which may be of interest to the user but are not readily apparent in their raw form. To be able to deal with the data interactively, AQSim allows the scientist to make an informed tradeoff between query response accuracy and time. In this paper, we present the framework of AQSim with a focus on its architectural design. We also show the results from an initial proof-of-concept prototype developed at LLNL. The presented framework is generic enough to handle more than just simulation data.
Abdulla, G; Baldwin, C; Critchlow, T; Kamimura, R; Lee, B; Musick, R; Snapp, R; Tang, N
Efficient query recommendations in the long tail via center-piece subgraphs
We present a recommendation method based on the wellknown concept of center-piece subgraph, that allows for the time/space efficient generation of suggestions also for rare, i.e., long-tail queries. Our method is scalable with respect to both the size of datasets from which the model is computed and the heavy workloads that current web search engines have to deal with. Basically, we relate terms contained into queries with highly correlated queries in a query-flow graph. This enables a novel recommendation generation method able to produce recommendations for approximately 99 % of the workload of a real-world search engine. The method is based on a graph having term nodes, query nodes, and two kinds of connections: term-query and query-query. The first connects a term to the queries in which it is contained, the second connects two query nodes if the likelihood that a user submits the second query after having issued the first one is sufficiently high. On such large graph we need to compute the center-piece subgraph induced by terms contained into queries. In order to reduce the cost of the above computation, we introduce a novel and efficient method based on an inverted index representation of the model. We experiment our solution on two real-world query logs and we show that its effectiveness is comparable (and in some case better) than state-of-the-art methods for head-queries. More importantly, the quality of the recommendations generated remains very high also for long-tail queries, where other methods fail even to produce any suggestion. Finally, we extensively investigate scalability and efficiency issues and we show the viability of our method in real world search engines. 1.
Francesco Bonchi; Raffaele Perego; Hossein Vahabi; Rossano Venturini; Fabrizio Silvestri
Continuous injection of an inert gas through a drill rig for drilling into potentially hazardous areas
A drill rig for drilling in potentially hazardous areas includes a drill having conventional features such as a frame, a gear motor, gear box, and a drive. A hollow rotating shaft projects through the drive and frame. An auger, connected to the shaft is provided with a multiplicity of holes. An inert gas is supplied to the hollow shaft and directed from the rotating shaft to the holes in the auger. The inert gas flows down the hollow shaft, and then down the hollow auger, and out through the holes in the bottom of the auger into the potentially hazardous area.
McCormick, S.H.; Pigott, W.R.
Development and Application of Insulated Drill Pipe for High Temperature, High Pressure Drilling
This project aimed to extend the insulated drill pipe (IDP) technology already demonstrated for geothermal drilling to HTHP drilling in deep gas reservoirs where temperatures are high enough to pose a threat to downhole equipment such as motors and electronics. The major components of the project were: a preliminary design; a market survey to assess industry needs and performance criteria; mechanical testing to verify strength and durability of IDP; and development of an inspection plan that would quantify the ability of various inspection techniques to detect flaws in assembled IDP. This report is a detailed description of those activities.
Tom Champness; Tony Worthen; John Finger
Development plan for an advanced drilling system with real-time diagnostics (Diagnostics-While-Drilling)
This proposal provides the rationale for an advanced system called Diagnostics-while-drilling (DWD) and describes its benefits, preliminary configuration, and essential characteristics. The central concept is a closed data circuit in which downhole sensors collect information and send it to the surface via a high-speed data link, where it is combined with surface measurements and processed through drilling advisory software. The driller then uses this information to adjust the drilling process, sending control signals back downhole with real-time knowledge of their effects on performance. The report presents background of related previous work, and defines a Program Plan for US Department of Energy (DOE), university, and industry cooperation.
A Proposal for an Advanced Drilling System with Real-Time Diagnostics (Diagnostics-While-Drilling)
In this paper, we summarize the rationale for an advanced system called Diagnostics-While-Drilling (DWD) and describe its benefits, preliminary configuration, and essential characteristics. The central concept is a closed data circuit in which downhole sensors collect information and send it to the surface via a high-speed data link, where it is combined with surface measurements and processed through drilling advisory software. The driller then uses this information to adjust the drilling process, sending control signals back downhole with real-time knowledge of their effects on performance. We outline a Program Plan for DOE, university, and industry to cooperate in the development of DWD technology.
Finger, J.T.; Mansure, A.J.; Prairie, M.R.
Laser Oil & Gas Well Drilling [Laser Applications Laboratory...
benefit in reducing the high costs of operating a drill rig. Today, a typical land-based oil or gas well costs around 400,000 to drill, while costs for an offshore well average...
Oil and Gas Well Drilling | Open Energy Information
Oil and Gas Well Drilling Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Oil and Gas Well Drilling Author Jeff Tester Published NA, 2011 DOI Not...
Materials to Support High Pressure, High Temperature (HPHT) Drilling
... HPHT drilling and the drill pipe materials currently available on the market. ... Computational Phase Studies in the (La,Sr)(Ga,Mg)O3-d System for IT-SOFC�...
Monitoring downhole pressures and flow rates critical for underbalanced drilling
True underbalanced drilling, and not just flow drilling, requires thorough engineering and monitoring of downhole pressures and flow rates to ensure the formations are drilled without formation damage. Underbalanced drilling involves intentionally manipulating the bottom hole circulating pressure so that it is less than static reservoir pressure. This underbalanced pressure condition allows reservoir fluids to enter the well bore while drilling continues, preventing fluid loss and many causes of formation damage. Applied correctly, this technology can address problems of formation damage, lost circulation, and poor penetration rates. Another important benefit of drilling underbalanced is the ability to investigate the reservoir in real time. The paper discusses the reasons for under balanced drilling, creating underbalance, well site engineering, fluids handling, rotating flow divertor injection gas, survey techniques, data acquisition, operations, maintaining under-balance, routine drilling, rate of penetration, misconceptions, and economics.
Butler, S.D.; Rashid, A.U.; Teichrob, R.R. [Flow Drilling Engineering Ltd., Calgary, Alberta (Canada)
Coiled tubing drilling requires economic and technical analyses
Field experience has proven that coiled tubing drilling is a technical and economic option on some wells; however, coiled tubing drilling is not the solution to every drilling prospect or production-enhancement job. To determine if coiled tubing drilling is viable, the geographic, technical, and economic aspects of each project must be considered in detail. Generally, with some limitations, coiled tubing drilling is feasible primarily when jointed pipe cannot be used effectively. Also, coiled tubing drilling may be more appropriate because of some special well site requirements, such as environmental regulations requiring less surface disturbance. The paper discusses technical considerations which need to be considered, economic feasibility, limitations of well types (new shallow wells, conventional reentry, through-tubing reentry, and underbalanced drilling), and outlook for further growth in the coiled tubing drilling industry.
Gary, S.C. (Schlumberger Dowell, Sugar Land, TX (United States))
Drilling Waste Management Fact Sheet: Onsite Burial (Pits, Landfills...
management. During most U.S. onshore drilling operations, the cuttings separated by the shale shaker are sent to a pit called the reserve pit located near the drill rig. The pit is...
Analyzing the dynamic behavior of downhole equipment during drilling
Advanced geothermal drilling systems will require a bottom hole assembly (BHA) which utilizes sophisticated electronic and mechanical equipment to accomplish faster, more trouble free, smarter drilling. The bit-drill string/formation interaction during drilling imposes complex, intermittent dynamic loading on the downhole equipment. A finite element computer code, GEODYN, is being developed to allow analysis of the structural response of the downhole equipment during drilling and to simulate the drilling phenomena (i.e. penetration, direction, etc.). Phase 1 GEODYN, completed early in 1984, provides the capability to model the dynamic response of a polycrystalline diamond compact (PDC) bit interacting with a non-homogeneous formation. Succeeding development phases will allow inclusion of stabilizers and, eventually, the entire drill string in addition to facilitating drill ahead simulation.
Baird, J.A.; Caskey, B.C.
Field Testing of Environmentally Friendly Drilling System
The Environmentally Friendly Drilling (EFD) program addresses new low-impact technology that reduces the footprint of drilling activities, integrates light weight drilling rigs with reduced emission engine packages, addresses on-site waste management, optimizes the systems to fit the needs of a specific development sites and provides stewardship of the environment. In addition, the program includes industry, the public, environmental organizations, and elected officials in a collaboration that addresses concerns on development of unconventional natural gas resources in environmentally sensitive areas. The EFD program provides the fundamentals to result in greater access, reasonable regulatory controls, lower development cost and reduction of the environmental footprint associated with operations for unconventional natural gas. Industry Sponsors have supported the program with significant financial and technical support. This final report compendium is organized into segments corresponding directly with the DOE approved scope of work for the term 2005-2009 (10 Sections). Each specific project is defined by (a) its goals, (b) its deliverable, and (c) its future direction. A web site has been established that contains all of these detailed engineering reports produced with their efforts. The goals of the project are to (1) identify critical enabling technologies for a prototype low-impact drilling system, (2) test the prototype systems in field laboratories, and (3) demonstrate the advanced technology to show how these practices would benefit the environment.
David Burnett
Program, Texas A&M University, as an account of work performed under the international Ocean Drilling sheet, including the 3000-m-high subglacial Gamburtsev Mountains. The glacier follows the line ice drainage basin is believed to be long-lived because of this structural control, and Prydz Bay
rain has built a mound over geologic time of almost pure calcareous and siliceous sediments stretching of this northward plate motion: (1) the thickest part of the equatorial mound of biogenic sediment is displaced drilling and coring of the central Pacific equatorial mound of sediments (e.g., DSDP Legs 5, 8, 9, and 16
Rickenbacker Causeway Miami, FL 33139 Amanda A. Palmer Staff Science Representative, Leg 101 Ocean Drilling Schlager (Rosenstiel School of Marine and Atmospheric Sciences, Miami, Florida) Co-Chief Scientist Paul of Marine and Atmospheric Sciences, Miami, Florida) Gregor Eberli (Geologisches Institute, ETH
Drilling and operating geothermal wells in California
The following procedural points for geothermal well drilling and operation are presented: geothermal operators, definitions, geothermal unit, agent, notice of intention, fees, report on proposed operations, bonds, well name and number, well and property sale on transfer, well records, and other agencies. (MHR)
-Canada-Chinese Taipei-Korea Consortium for Ocean Drilling Deutsche Forschungsgemeinschaft (Federal Republic of Germany 68588-0340, U.S.A.; E-mail: email@example.com) Andreas Lückge, Organic Geochemist (Institut für Chemie
Practical applications of a drilling data center
Tenneco Oil is using a real-time drilling-data acquisition, telemetry, data base, and applications-program system for Gulf of Mexico operations. The system provides for data acquisition in real time from commercially available logging units. The data are transmitted into a central office onshore via microwave or satellite telemetry links. Up to 352 drilling parameters are transmitted from each computerized logging unit and archived in the data base every 20 sec. Parameters can include measurement-while-drilling (MWD) data as well as mud-logging data. Applications programs utilizing these parameters are available in the central site data center (CSDC) and in locations throughout Tenneco's facilities in Lafayette, La. Access to the CSDC and its computing power is also available on the offshore rig. Backup surveillance of critical drilling parameters is provided through alarms and continuous monitoring of the parameters, thus providing for a safer operation. Rig efficiency has also been improved through analysis of the data and comparison of the data between various rig operations and rigs. Both tangible and intangible cost savings are discussed.
Graff, R.L.; Segrest, R.P.
Personnel 17 1. Laboratory Officer 17 2. Technicians 17 3. Computer System Manager 17 4. Curatorial. Logging Depth Measurements 34 D. Coring and Drilling Equipment and Usage 34 1. Rotary Coring (RCB) System 34 2. Advanced Piston Coring (APC) System 36 3. Extended Core Barrel (XCB) 37 4. Motor-Driven Core
Forecast of geothermal-drilling activity
The number of geothermal wells that will be drilled to support electric power production in the United States through 2000 A.D. are forecasted. Results of the forecast are presented by 5-year periods for the five most significant geothermal resources.
Mansure, A.J.; Brown, G.L.
Impedance-matched drilling telemetry system
A downhole telemetry system that uses inductance or capacitance as a mode through which signal is communicated across joints between assembled lengths of pipe wherein efficiency of signal propagation through a drill string, for example, over multiple successive pipe segments is enhanced through matching impedances associated with the various telemetry system components.
Normann, Randy A. (Edgewood, NM); Mansure, Arthur J. (Albuquerque, NM)
Online query answering with differential privacy: a utility-driven approach using Bayesian inference
Data privacy issues frequently and increasingly arise for data sharing and data analysis tasks. In this paper, we study the problem of online query answering under the rigorous differential privacy model. The existing interactive mechanisms for differential privacy can only support a limited number of queries before the accumulated cost of privacy reaches a certain bound. This limitation has greatly hindered their applicability, especially in the scenario where multiple users legitimately need to pose a large number of queries. To minimize the privacy cost and extend the life span of a system, we propose a utility-driven mechanism for online query answering using Bayesian statistical inference. The key idea is to keep track of the query history and use Bayesian inference to answer a new query using previous query answers. The Bayesian inference algorithm provides both optimal point estimation and optimal interval estimation. We formally quantify the error of the inference result to determine if it satisfies t...
Xiao, Yonghui
Horizontal drilling boosts Pennsylvania�s natural gas production ...
Between 2009 and 2011, Pennsylvania's natural gas production more than quadrupled due to expanded horizontal drilling combined with hydraulic fracturing.
Laser Drilling with Gated High Power Fiber Lasers
About this Abstract. Meeting, Materials Science & Technology 2010. Symposium, Laser Applications in Materials Processing. Presentation Title, Laser Drilling�...
Drilling for Geothermal Resources Rules - Idaho | Open Energy...
Geothermal Resources Rules - Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Reference Material: Drilling for Geothermal Resources Rules - Idaho Details...
Liability issues surrounding oil drilling mud sumps
This presentation examines liability issues surrounding oil drilling mud sumps and discusses them in relation to two recent cases that arose in Ventura County, California. Following a brief history of regulatory interest in oil drilling mud and its common hazardous substances, various cause of action arising from oil drilling mud deposits are enumerated, followed by defenses to these causes of action. Section 8002 (m) of the Resource Conservation and Recovery Act is mentioned, as are constituents of oil and gas waste not inherent in petroleum and therefore not exempt from regulation under the petroleum exclusion in the Comprehensive Environmental Response, Compensation and Recovery Act. Key legal words such as hazardous substance, release, public and private nuisance, trespass, responsible parties, joint and several liability, negligence, and strict liability are explained. The effects on liability of knowledge of the deposits, duty to restore land to its original condition, consent to the deposit of oil drilling mud, and noncompliance and compliance with permit conditions are analyzed. The state-of-the-art defense and research to establish this defense are mentioned. The newly created cause of action for fear of increased risk of cancer is discussed. Issues on transfer of property where oil drilling mud has been deposited are explored, such as knowledge of prior owners being imputed to later owners, claims of fraudulent concealment, and as is' clauses. The effects on the oil and gas industry of the California Court of Appeals for the Second District rulings in Dolan v. Humacid-MacLeod and Stevens v. McQueen are speculated.
Dillon, J.J.
An Intelligent System for Petroleum Well Drilling Cutting Analysis
Cutting analysis is a important and crucial task task to detect and prevent problems during the petroleum well drilling process. Several studies have been developed for drilling inspection, but none of them takes care about analysing the generated cutting ... Keywords: Cutting analysis, petroleum well drilling monitoring, optimum-path forest
Aparecido N. Marana; Giovani Chiachia; Ivan R. Guilherme; Jo�o P. Papa
Surface control bent sub for directional drilling of petroleum wells
Directional drilling apparatus for incorporation in a drill string, wherein a lower apparatus section is angularly deviated from vertical by cam action and wherein rotational displacement of the angularly deviated apparatus section is overcome by additional cam action, the apparatus being operated by successive increases and decreases of internal drill string pressure.
Russell, Larry R. (6025 Edgemoor, Suite C, Houston, TX 77081)
Suggested drilling research tasks for the Federal Government
A brief summary discussion of drilling, drilling research and the role of the government in drilling research is presented. Specific research and development areas recommended for federal consideration are listed. The technical nature of the identified tasks is emphasized. The Appendices present the factual basis for the discussion and recommendations. Numerous references are noted in the Appendices.
Carson, C.C.
Screening criteria help select formations for underbalanced drilling
Certain laboratory screening procedures can help determine the effectiveness of underbalanced drilling in a specific application. These screening criteria can help in analyzing the types of reservoirs which present good applications for underbalanced drilling technology. This paper discusses the types of information that should be obtained for any reservoir prior to designing the underbalanced drilling program for optimum performance.
Finite element analysis of the electro jet drilling process
The electro jet drilling (EJD) process is gaining prominence in the machining of micro and macro holes in difficult-to-machine materials used in aerospace, electronics and computers, medical, and automobile industries. As the trend towards miniaturization ... Keywords: electro jet drilling, electrochemical drilling, finite element method, radial overcut
M. Sen; H. S. Shan
Progress Toward an Advanced Geothermal Deep-Drilling System
A previously developed concept for an advanced geothermal drilling system (AGDS) has been extended toward a feasibility design stage. Hardware projects for two percussion, air and hydraulic, hammer drills are underway. Two drill string options and an unique nitrogen supply system are described.
Rowley, J.; Saito, S.; Long, R.
An Industry/DOE Program to Develop and Benchmark Advanced Diamond Product Drill Bits and HP/HT Drilling Fluids to Significantly Improve Rates of Penetration
A deep drilling research program titled 'An Industry/DOE Program to Develop and Benchmark Advanced Diamond Product Drill Bits and HP/HT Drilling Fluids to Significantly Improve Rates of Penetration' was conducted at TerraTek's Drilling and Completions Laboratory. Drilling tests were run to simulate deep drilling by using high bore pressures and high confining and overburden stresses. The purpose of this testing was to gain insight into practices that would improve rates of penetration and mechanical specific energy while drilling under high pressure conditions. Thirty-seven test series were run utilizing a variety of drilling parameters which allowed analysis of the performance of drill bits and drilling fluids. Five different drill bit types or styles were tested: four-bladed polycrystalline diamond compact (PDC), 7-bladed PDC in regular and long profile, roller-cone, and impregnated. There were three different rock types used to simulate deep formations: Mancos shale, Carthage marble, and Crab Orchard sandstone. The testing also analyzed various drilling fluids and the extent to which they improved drilling. The PDC drill bits provided the best performance overall. The impregnated and tungsten carbide insert roller-cone drill bits performed poorly under the conditions chosen. The cesium formate drilling fluid outperformed all other drilling muds when drilling in the Carthage marble and Mancos shale with PDC drill bits. The oil base drilling fluid with manganese tetroxide weighting material provided the best performance when drilling the Crab Orchard sandstone.
State-of-the-art in coalbed methane drilling fluids
The production of methane from wet coalbeds is often associated with the production of significant amounts of water. While producing water is necessary to desorb the methane from the coal, the damage from the drilling fluids used is difficult to assess, because the gas production follows weeks to months after the well is drilled. Commonly asked questions include the following: What are the important parameters for drilling an organic reservoir rock that is both the source and the trap for the methane? Has the drilling fluid affected the gas production? Are the cleats plugged? Does the 'filtercake' have an impact on the flow of water and gas? Are stimulation techniques compatible with the drilling fluids used? This paper describes the development of a unique drilling fluid to drill coalbed methane wells with a special emphasis on horizontal applications. The fluid design incorporates products to match the delicate surface chemistry on the coal, a matting system to provide both borehole stability and minimize fluid losses to the cleats, and a breaker method of removing the matting system once drilling is completed. This paper also discusses how coal geology impacts drilling planning, drilling practices, the choice of drilling fluid, and completion/stimulation techniques for Upper Cretaceous Mannville-type coals drilled within the Western Canadian Sedimentary Basin. A focus on horizontal coalbed methane (CBM) wells is presented. Field results from three horizontal wells are discussed, two of which were drilled with the new drilling fluid system. The wells demonstrated exceptional stability in coal for lengths to 1000 m, controlled drilling rates and ease of running slotted liners. Methods for, and results of, placing the breaker in the horizontal wells are covered in depth.
Baltoiu, L.V.; Warren, B.K.; Natras, T.A.
QCS : a system for querying, clustering, and summarizing documents.
Information retrieval systems consist of many complicated components. Research and development of such systems is often hampered by the difficulty in evaluating how each particular component would behave across multiple systems. We present a novel hybrid information retrieval system--the Query, Cluster, Summarize (QCS) system--which is portable, modular, and permits experimentation with different instantiations of each of the constituent text analysis components. Most importantly, the combination of the three types of components in the QCS design improves retrievals by providing users more focused information organized by topic. We demonstrate the improved performance by a series of experiments using standard test sets from the Document Understanding Conferences (DUC) along with the best known automatic metric for summarization system evaluation, ROUGE. Although the DUC data and evaluations were originally designed to test multidocument summarization, we developed a framework to extend it to the task of evaluation for each of the three components: query, clustering, and summarization. Under this framework, we then demonstrate that the QCS system (end-to-end) achieves performance as good as or better than the best summarization engines. Given a query, QCS retrieves relevant documents, separates the retrieved documents into topic clusters, and creates a single summary for each cluster. In the current implementation, Latent Semantic Indexing is used for retrieval, generalized spherical k-means is used for the document clustering, and a method coupling sentence ''trimming'', and a hidden Markov model, followed by a pivoted QR decomposition, is used to create a single extract summary for each cluster. The user interface is designed to provide access to detailed information in a compact and useful format. Our system demonstrates the feasibility of assembling an effective IR system from existing software libraries, the usefulness of the modularity of the design, and the value of this particular combination of modules.
Dunlavy, Daniel M.
QCS: a system for querying, clustering and summarizing documents.
Information retrieval systems consist of many complicated components. Research and development of such systems is often hampered by the difficulty in evaluating how each particular component would behave across multiple systems. We present a novel hybrid information retrieval system--the Query, Cluster, Summarize (QCS) system--which is portable, modular, and permits experimentation with different instantiations of each of the constituent text analysis components. Most importantly, the combination of the three types of components in the QCS design improves retrievals by providing users more focused information organized by topic. We demonstrate the improved performance by a series of experiments using standard test sets from the Document Understanding Conferences (DUC) along with the best known automatic metric for summarization system evaluation, ROUGE. Although the DUC data and evaluations were originally designed to test multidocument summarization, we developed a framework to extend it to the task of evaluation for each of the three components: query, clustering, and summarization. Under this framework, we then demonstrate that the QCS system (end-to-end) achieves performance as good as or better than the best summarization engines. Given a query, QCS retrieves relevant documents, separates the retrieved documents into topic clusters, and creates a single summary for each cluster. In the current implementation, Latent Semantic Indexing is used for retrieval, generalized spherical k-means is used for the document clustering, and a method coupling sentence 'trimming', and a hidden Markov model, followed by a pivoted QR decomposition, is used to create a single extract summary for each cluster. The user interface is designed to provide access to detailed information in a compact and useful format. Our system demonstrates the feasibility of assembling an effective IR system from existing software libraries, the usefulness of the modularity of the design, and the value of this particular combination of modules.
Dunlavy, Daniel M.; Schlesinger, Judith D. (Center for Computing Sciences, Bowie, MD); O'Leary, Dianne P. (University of Maryland, College Park, MD); Conroy, John M. (Center for Computing Sciences, Bowie, MD)
High pressure drilling system triples ROPS, stymies bit wear
Recent West Texas field tests of an experiental high-pressure drilling system have nearly tripled typical penetration rates in hard dolomite while putting virtually no visible wear on the bits, even those designed for much softer formations. With this drilling system, developed by FlowDril Corp. of Kent, Wash., and their joint-venture partner Grace Drilling Co., clarified drilling fluids (minimum solids) are pressurized to nearly 30,000 psi and directed to the bottom of the hole through a special nozzle attached to the drill bit. The action of this high pressure stream augments the bit's job, resulting in higher ROPs and decreased bit wear.
Killalea, M.