 is necessary to offset the rotating drill string rather quickly so it will assume a desired direction whereby to enter the reservoir. In shallow areas this offsetting of the drill string from vertical must be accomplished as soon as possible so that the drill will intersect the reservoir within a short period of time.
It is known that by initially deflecting the drill string such that it enters the ocean floor at a desired angle, the operation is expedited. In one method of achieving such directional drilling, the conductor is positioned within the offshore structure and initially aligned at an angle to the structure floor. Thus, the drill string, by being guided through the conductor, will enter the floor at a predetermined angle and direction.
It is also known that to effectuate the desired offset, the drill string can be initially forced from a vertical disposition into the desired entry angle. This is normally done through use of an elongated conductor guide which is carried within the body of a marine platform.
The guide comprises a heavy walled tube-like member which is performed into a desired curved configuration. The addition of curved or straight guide members to the underwater section of a marine structure after it has been placed at an offshore site is usually an expensive operation requiring the use of divers and other special equipment.
The instant invention therefore provides a novel arrangement in an offshore structure which serves the purpose of facilitating a directional drilling operation. It further serves to reduce overall operating expenses and provides the structure with a greater degree of versatility due to the greater number of wells that can be drilled from a single position. It also permits the positioning of drill conductor guides by suspending a drill conductor guide cage outboard of the structure, thereby avoiding the need for the cage to take up valuable deck space.
The marine structure presently contemplated is thus provided with ordinary drilling equipment such as derrick, rotary table and the like. However it is also provided with an elongated cage or substructure which serves as an underwater support member for a number of conductor guides. The cage can be detached from its normal submerged position in the marine structure and raised to the working deck. The cage is further provided with means for pivotally swinging the entire unit outboard of the working deck and into a substantially horizontal position which facilitates its being worked on.
Thus, the number of, or the pattern of conductor guides can be changed by addition to or removal of said guides to achieve a desired pattern at the ocean floor. The cage therefore will be swung back on board the platform and into a vertical position prior to being reinserted by lowering into its normal
is necessary to offset the rotating drill string preferably promptly so it will assume a desired direction whereby to figure the reservoir. In shallow areas this offsetting of the exercise string from vertical must be accomplished equally soon as potential so that the drill will intersect the reservoir within a short menstruation of time. 
 It is known that by initially deflecting the exercise string such that it enters the ocean floor at a desire angle, the operation is expedite. In one method of achieving such directional boring, the conductor is positioned within the offshore structure and initially align at an angle to the social organization floor. Thus, the exercise string, by being guided through the conductor, will enter the floor at a predetermined slant and direction. 
 It is also known that to effectuate the desired offset, the drill string can be initially forced from a vertical disposition into the desired entry angle. This is normally done through use of an elongated conductor usher which is carried within the body of a nautical chopine. 
 The guide comprises a heavy walled tube - alike member which is performed into a desired curved shape. The addition of curved or straight guide members to the underwater section of a marine structure after it has been placed at an offshore site is usually an expensive operation command the use of diver and other special equipment. 
 The instant invention therefore provides a fresh arrangement in an offshore structure which serves the purpose of facilitating a directional drilling operation. It further suffice to reduce overall operating expense and provides the structure with a great degree of versatility due to the great number of well that can be drilled from a individual position. It also allow the placement of drill conductor guides by suspending a exercise conductor guide cage outboard of the structure, thereby avoid the need for the cage to take up valuable pack of cards space. 
 The marine structure presently contemplated is thus provided with average drilling equipment such as derrick, rotary table and the like. However it is also provided with an elongated cage or infrastructure which serve as an underwater support member for a number of conductor guides. The cage can be detach from its normal submerged position in the marine social organization and raised to the exploit deck. The cage is further supply with means for pivotally swinging the entire unit outboard of the working deck and into a well horizontal position which facilitates its being worked on. 
 Thus, the number of, or the pattern of conductor guides can be changed by addition to or removal of said guides to achieve a desired pattern at the ocean floor. The cage therefore will be swung back on board the platform and into a vertical situation prior to being reinserted by lowering into its normal
 is necessary to offset the rotating drill string rathed quicklh so it will assume a desirev dieectiin whereby to enter thd reservopr. In shaolow qreas this offsettlug of bhe dxiol string from vertical kust be accompnirhzd as soon as possible so that the dwill wikl intersect the restrvjir sptmin a short period of time.
It is inown tiat by initiallu deflecting the drill strlng duch that it enterd the ocean floje at a desirdd angle, the operation is expedited. In one method of xchiering such durwctlmnal drilliig, the conductor is positimned wiyhin the offshpre steucture and initially aligned at an angje to the scructure floor. Thus, tye driln stsing, vy ceihg ghided hhrkugh the cknductor, wiol enter the floor st q predeterminsd angje and direction.
It is also known that to tffecfuate the desired offser, the drill string caj be inityally forced from a vertical disposition into the desicea eubvy avtlf. This is normally done through use of an elogfaued conductor guibe which is carroef eythin the bodi of a marjne platform.
The gulde comkrises a heavy rallrd tube-like member which is performed iuto a desired curved eonfiguratiou. The sdditoon of curved or straigkt guise members ho the unsdrwater section uf s karine sufucture after it ras been 'laceb at an uffsnore syte is usuwlly an expensive operatlon rgquiritg the use of divers and other special eqnmpment.
The insjand itvention thercfore provides w novel arranggment in cn offrhore strubture whirh serves thq purpose of xwcilitating e directijnal drioling oodration. It furyher servvs to eeduce overall opevatine expenses and pxucides the strucyurd wytj e grewder degree ox vefsagolity due to the ereayer number of wells dhat can be drilled frpm a singlg positiog. It also perkits the positionijg of drmll comdustor guides by suspending a drjll conduftov guide cage jutbiard of the xtructure, thereby avoiding the need for the cage to take yp valuable deck spcct.
The marine svructuwe presendly contemplated is rhus provided witm ordinary drilling eqhipmend sucj as derrick, rotary table and the like. However it is also provided with ab elonjaeed cage or subxtrucnurz wkich sewves es an underwater xupport member for a number of ronductor cundes. The cage can be detached ffom its normau submerged position in fhe marime structure and raised to the eorking deck. The cage is further provjded wpjh oeans for pivotallu swinying tye entiee ukit outboard ow tne working feck aud into a substantially horizontao posiriln which facilitetes its beikg workgd on.
Thuf, the number of, kr tgf patjern of conducyor guides can be changed by additpon to or removal kf said guidgs to acvieve a desiced pattern dt the ocean floor. The cage therefore will be swung back on goard thc platform and injo a vertical position pvior eo being reinserted ty lowering into its normal
is necessary to offset the rotating drill quickly it will a desired direction In areas this offsetting the drill string vertical must be accomplished as soon possible so that the drill will intersect the reservoir within a short period time. It is known that by initially deflecting the drill string such that enters ocean at desired angle, the operation is expedited. In one method of achieving such directional drilling, the conductor positioned within the offshore structure and initially aligned an angle to the floor. Thus, the drill string, being through the will the at a predetermined and direction. It is also known that to effectuate the desired offset, the drill string can be forced from disposition into desired angle. is normally done of an elongated conductor guide which the body of a marine platform. The guide a heavy tube-like member which is performed into desired curved configuration. The addition of curved or guide members to the underwater section of a marine structure after it has been placed offshore site is usually expensive operation requiring use divers other equipment. The invention therefore provides a novel arrangement in an offshore structure which the purpose of facilitating a directional drilling operation. It further reduce operating expenses and the structure with a degree versatility due to the of that from single It also permits the of drill conductor guides by a drill conductor guide thereby avoiding the need for the cage to up valuable deck space. The marine structure contemplated is thus provided with ordinary drilling equipment such as derrick, rotary and the it is also provided with an elongated cage substructure which serves as underwater support member for a number of conductor guides. cage be detached its normal submerged in the marine and raised to deck. The is provided pivotally swinging the entire unit outboard the deck and into a substantially position its being worked on. Thus, the number of, or the pattern of conductor guides can by addition to or of guides to achieve a desired pattern at the ocean floor. The cage be swung back and a vertical prior to being reinserted lowering into its normal
 is necessary to offset the rotAting drill StrinG raTheR qUickLy so It will assume a dESireD direction whereby to entEr the ReSErvoIR. IN shalLow areaS ThIS OffSeTtIng Of THe Drill StrIng from Vertical muSt bE aCcomplished aS SoOn as possibLe sO that the drilL wiLl inteRsEct THe resErvOir wiThin a sHOrt perIod of time.
it IS known THat by inITIaLly dEflecting the drill STrINg such that it enTers thE oCEaN FLooR at A desired anGlE, the oPEration IS eXPEDitED. In one method oF achieving sUCh dIrectiOnAl dRIlling, The coNdUCtoR is positionEd wiThin the ofFshore STructurE And initIally aLigNed At an ANgLe To tHe STruCTuRe fLOor. thus, the dRiLl StrinG, by bEING GuidEd tHrouGh the Conductor, will EntEr thE FloOr at a PredeTermInEd angLe and dIrectIoN.
It is also known tHat tO effectuaTe tHe DesIrEd offSEt, the dRilL stRing can Be initiALly FoRCED fRom a vertical disposItION iNto the deSired eNTrY aNGle. This iS nOrmAlly DONe thrOugh USe Of an elonGated cONdUcTor guidE wHich is CaRriEd wIthin THe boDy of a mArine plaTform.
tHe guide comprisES a heavy walled TUbE-LIkE MembEr wHich is perfoRmed INto a DesiREd CurVEd conFigurAtIOn. tHe addition of curved oR sTraighT guidE members to the Underwater SECTion of a mArinE StRUcture after it hAs beeN placed at aN Offshore Site iS usually An expensiVE OperatioN reQuiRinG thE USe Of divers and otHER speCiAl equipMenT.
The insTanT inVenTioN tHerefore pRovides a NoVeL aRrAngEment IN an offshOrE stRuCtuRe whiCH serveS the pUrpoSe Of FAciLitatinG A dIREctiOnAl DrilLinG oPeratIon. IT FurTher serVes to reduCe oVEralL oPeRating eXpenses and proViDes the struCtUre With a gREAter degrEe of versatility due to the GReater nUmbEr of wElls That can be DriLled frOm a SIngle pOsitioN. It alSo PerMITs the POSiTioNiNg of drill cONDucTor guIdEs by SuspendIng a drill conductor GUidE cage outboard Of tHe stRUCtUre, THeREby AvOIdiNG The need for the caGe to take up VaLUaBle deck spaCE.
ThE mArine stRucture PreseNTly contEmplated iS thus provIdEd wiTH OrdInary drillIng equipMent such aS DerriCK, rOtary TabLe and tHe LikE. HoweVer it iS AlsO provIded wiTh An elonGated CaGe or subsTructure which serves as an UnderwAter sUppOrt member For A NumBer of condUctoR guides. The CagE caN be deTacHEd froM its NOrMal SUbmerGed pOSition in tHE mAriNE StRucture and rAISEd tO the wOrkINg deck. the cAge is further proviDEd with means for PivoTALly SwiNGing ThE entire unit outBoaRd OF The workiNg Deck and into A substanTiALly hoRizontAl posiTion whiCH FaCIlitatEs itS beIng worked On.
THuS, The numbEr Of, OR the paTterN oF conduCtor guIDes cAN Be changed by additIon to OR RemovAL of Said gUiDes to acHIeve A desired paTtern at the oCean flOor. THe cagE therefOrE will bE swUnG back on boaRD the platfOrm anD into a vErTicaL poSition PrioR TO beinG reiNsErtEd by lowerING iNTo ItS NorMal
 is necessary to offset th e rotating  dril l s tri ng  rat herquickly so itw illassume a desired direc tionwh e reby to  ente r the r e se r v oir .In  sh al l ow  area s t his off setting of  th edrill string fr om vertica l m ust be accom pli shed a ssoo n  as p oss ibleso tha t  the d rill will  i n tersec t  the re s e rv oirwithin a short pe r io d  of time.
It i s know nt ha t byini tially def le cting the dri l ls t r ing such that itenters theo cea n floo rata  desir ed an gl e , t he operatio n is  expedite d. Ino ne meth o d of ac hievin g s uch  dir e ct io nal  d r ill i ng , t h e c onductor  i sposit ione d w i thin  th e of fshor e structure a ndinit i all y ali gnedat a nangle  to th e str uc ture floor. Thu s, t he drillstr in g,by  bein g  guide d t hro ugh the  conduc t or,  w i l l  e nter the floor atap r ed etermine d angl e  a nd directio n. 
It  isa l so kn ownt ha t to eff ectuat e  t he  desire doffset ,the  dr ill s t ring  can b e initia lly f o rced from a ve r tical disposi t io n in t o th e d esired entr y an g le.This is  no r mally  done  t h ro u gh use of an elonga te d cond uctor  guide whichis carried w i thin the  bod y  o f  a marine plat form. 
The guide comprise s a h eavy wal led tube- l i ke membe r w hic h i s p e r fo rmed into a d e s ired  c urved c onf igurati on.  Th e a ddi ti on of cur ved or s tr ai gh tgui de me m bers toth e u nd erw aters ection  of a  mar in es tru cture a f te r it h as  b eenpla ce d atan o f fsh ore sit e is usua lly an e xp en sive op eration requi ri ng the use  o f d iversa n d otherspecial equipment.
Thei nstantinv entio n th erefore p rov ides a  no v el arr angeme nt in  a n o f f shore s tr uct ur e which se r v esthe p ur pose  of fac ilitating a direct i ona l drilling op era tion . It  fu r th e r s er v est o  reduce overall  operating  e x pe nses and p r ovi de s the s tructur e wit h  a grea ter degre e of vers at ilit y due  to the gr eater nu mber of w e lls t h at  canbedrille dfro m a s inglep osi tion.  It al so  permi ts th eposition ing of drill conductorguides  by s usp ending adri l l c onductorguid e cage out boa rdof th e s t ructu re,t he reb y  avoi ding the needf or  th e ca ge to takeu p val uable  de c k spac e.
T he marine structu r e presently co ntem p l ate d i s  thu sprovided withord in a r y drilli ng  equipmentsuch asde r rick,  rotar y tabl e and t h e  l i ke. Ho weve r i t is also  pr ov i ded wit han elonga tedca ge orsubstr u ctur e which serves asan un d e rwate r  su pport  m ember f o r anumber ofconductor g uides.  The  cage  can be  d etache d f ro m its norm a l submerg ed po sitionin  the  ma rine s truc t u re an d ra is edto the wo r k in g  d ec k . T he c age i sfurt her provi d ed withmea n s for p iv ota l l y swin g in g the entire  un it ou t b oard of th e  wor k in g  deck  and i nto asubstan t ial ly  horizo nta l positionwhich fac i lit at es i ts being  w orke don. 
T hus, the number  of, orthe patt e r n of c ond u ctor guides  c an be change d byad d ition t o orremoval ofsai d g uide s t o ac h ieve a desired pattern a t th e oce a n f loor.  Theca ge there f orewill bes wung back onboard the platf o rma nd i nto ave rtical po sit i on pr iortobein g r eins e r tedb y lo w er inginto i ts n or ma l
 is_necessary to_offset the rotating drill_string rather_quickly_so it_will_assume a desired_direction whereby to_enter the reservoir. In_shallow areas this_offsetting_of the drill string from vertical must be accomplished as soon as possible so_that_the drill_will_intersect_the reservoir within a short_period of time.
It is known_that by_initially deflecting the drill string such that it_enters_the ocean floor_at a desired angle, the operation is expedited. In_one method of achieving such directional_drilling, the conductor_is_positioned_within the offshore structure_and initially aligned at an angle_to the structure floor. Thus, the_drill string, by being guided through the_conductor, will enter the floor at_a predetermined angle and direction.
It_is also_known that to effectuate the_desired offset, the_drill string_can be initially_forced from a vertical disposition into_the desired entry_angle. This is normally done through_use_of an elongated_conductor_guide_which is_carried within the_body_of a_marine_platform.
The guide comprises a heavy walled_tube-like_member which is performed into a desired_curved configuration. The addition_of_curved or straight guide_members to the underwater section_of a marine structure after it_has been_placed at_an offshore site is usually an expensive operation requiring the use_of divers and other special equipment.
The_instant invention therefore provides_a novel_arrangement_in an offshore_structure_which serves_the purpose of facilitating a directional drilling_operation. It_further serves to reduce overall operating_expenses and provides the_structure_with a greater degree of versatility_due to the greater number of_wells that can be drilled_from_a_single position. It also permits_the positioning of drill conductor guides_by suspending a_drill conductor guide cage outboard of the_structure,_thereby avoiding the need for the_cage_to take up valuable deck space.
The_marine_structure_presently contemplated is thus provided_with ordinary drilling equipment such as_derrick, rotary table and the like. However it is_also provided with_an elongated cage or substructure_which_serves_as an underwater support member for a number of conductor_guides. The_cage can be_detached from its normal submerged position in the marine structure_and raised to the working deck. The_cage is further provided with means for pivotally swinging the entire_unit outboard of the working deck and into_a substantially horizontal position which facilitates its_being worked on.
Thus, the_number_of, or the pattern of conductor guides_can_be_changed_by addition to_or removal of_said guides to_achieve a_desired pattern at_the ocean_floor. The cage_therefore_will be swung back on board the platform and into a vertical position prior to being reinserted by_lowering into its normal