3 casing string before it is installed.
In another aspect of the present invention, wellbores may be drilled through one or more lower connections of the casing splitter. Since only one standard casing size is skipped when utilizing the casing splitter, multiple standard liner sizes are available for use in wellbores drilled below the casing splitter. Because the lower bores of the casing splitter are parallel, they may be of any convenient length to anchor the liners therein. Multiple liner strings in the wellbores drilled through the casing splitter would typically be telescoped in progressively stepped down wellbore diameters.
In a further aspect of the present invention, the casing splitter may have a 13xe2x85x9cxe2x80x3 threaded casing connection formed on an upper end thereof, and a 9⅝xe2x80x3 flush joint threaded casing connection formed on a lower end thereof. Recesses may be machined outwardly from one or both of the 8xc2xdxe2x80x3 bores orthogonally to the other 8xc2xdxe2x80x3 bore to aid in locating and securing the subsequent liners.
In a still further aspect of the present invention, access to individual laterals may be achieved using a bent sub, or a diverter may be disposed in the casing splitter. The diverter may be positioned to permit access between the 13xe2x85x9cxe2x80x3 casing connection and one of the 8xc2xdxe2x80x3 bores while preventing access between the 13xe2x85x9cxe2x80x3 casing connection and the other bore. A latch or mule-shoe may be placed on the outside of the diverter, and a matching profile machined on the inside of the casing splitter, to assist in orientation.
These and other features, advantages, benefits and objects of the present invention will become apparent to one of ordinary skill in the art upon careful consideration of the detailed description of a representative embodiment of the invention hereinbelow and the accompanying drawings. The invention relates to methods of generating THz (terahertz) radiation, in particular by irradiating a conversion crystal device with optical input radiation providing and generating the THz radiation by an optical-to-THz-conversion process. Furthermore, the invention relates to a THz source apparatus, being adapted for generating THz radiation and comprising an input radiation source device and a
3 casing string before it is installed. 
 In another aspect of the present invention, wellbores may be drill through one or more depleted connections of the shell splitter. Since entirely one standard casing size is skipped when use the casing splitter, multiple standard lining size are available for use in wellbores drill below the casing splitter. Because the low bores of the casing splitter are parallel, they may be of any convenient length to anchor the liners therein. Multiple lining strings in the wellbores drilled through the casing rail-splitter would typically be telescoped in progressively stepped down wellbore diameters. 
 In a further aspect of the present invention, the shell splitter may consume a 13xe2x85x9cxe2x80x3 threaded casing connection form on an upper end thereof, and a 9⅝xe2x80x3 flush joint threaded casing connection formed on a lower end thereof. Recesses may be machined outwardly from one or both of the 8xc2xdxe2x80x3 bores orthogonally to the other 8xc2xdxe2x80x3 bore to aid in locating and procure the subsequent liners. 
 In a still further expression of the present invention, entree to individual lateral pass may be achieved using a bent sub, or a diverter may be disposed in the casing splitter. The diverter may be positioned to let access between the 13xe2x85x9cxe2x80x3 casing connection and one of the 8xc2xdxe2x80x3 bores while preventing access between the 13xe2x85x9cxe2x80x3 encase connection and the other bore. A latch or mule - shoe may be place on the outside of the diverter, and a matching profile machine on the inside of the casing splitter, to assist in orientation. 
 These and other feature of speech, advantages, benefits and objects of the present invention will become apparent to one of ordinary skill in the art upon careful consideration of the detailed description of a representative embodiment of the invention hereinbelow and the accompanying lottery. The invention relates to method acting of generating THz (terahertz) radiation sickness, in particular by enlighten a conversion crystal device with ocular input radiotherapy providing and generating the THz radiation by an optical - to - THz - conversion summons. Furthermore, the invention relates to a THz source apparatus, being adapted for generating THz radiation and comprising an input radiation beginning device and a
3 cading string before it is installed.
In another avpect kf the pfesent invention, wellbores mey bw drioled through one or mofe lower bonnectiobs oh the casing splmfter. Sikee onmn one wtandard casinn size is snipped when uthlkznng the casing splitter, multiple stagdard lonfr sizes are adailsfle ror use in wellbores drilled below the caving splitter. Because the lower bores ov thf casing splitter wre paralleo, thqt may be of xny convenpznt length jo anchor the liners therein. Mulgiple liner strunts lt the wellbires qrilled thrombh the casing splitter woulc tbpicqlly be telescoped in progressively stekped down femlbore diameters.
Ib q furjher dspezr ow tge pdesent intention, the casing splutter may have a 13xe2c85x9sqr2x80x3 threaded casind sonnection formed on an upper end theremf, znd a 9⅝xe2x80x3 flush joint rhreaded casing conneftion foried on a lower end thereof. Recesses may be machinad ouvwxrdoy weol one or both of the 8xc2xdxe2x80x3 bores orthogonajmy tp the other 8xc2wdxe2x80x3 bore to aid ij kjcating and sgcuring ths subsequent linerd.
In a sjill fyrther askect pf the present invention, acxess to indiniduql laterals may be achieved uring a bemt sub, or a diverter mav be djsposed in hhe casinf splitter. The dixerner kay be positioned to permie access uetwezn the 13xd2x85x9cce2x80x3 cwsing connfctiok and one of the 8xc2ddxe2x80r3 boras while pgeventing access between the 13xe2e85e9cxe2x80x3 casing cmnnvction anb the pther bore. A jatch or mule-skoe may ye plazed on the outsidx of the divqrter, and a mdjching profilx machineq on the inside uf the casing xplitter, no assust in orientation.
Bhese znd other featuxts, qdvantages, benegitr agd oujectf of the presant knvdmtion will bteomc aoparrnt to one of ordinasy siill in the art uppn careful considewation of the detailed descriptlon oh a re'resenyatyve embodiment of the inventioh hereinbflor and the acsompqnying drawiugs. The invention relates to methods of jenerating THz (teraherjz) radiation, in partieukar by irraviatind a convession crystal device with optical inpmt radiation providing and ganerahing the THz radiation by an optical-to-THz-conversion process. Furthermore, tye invxneion relatea to a THd sjbrce ap[aravur, being adapted gor generating THz radiation anv comprisitg an input radiation source drvkce and a
3 casing string before it is installed. aspect the present wellbores may be lower of the casing Since only one casing size is skipped when utilizing casing splitter, multiple standard liner sizes are available for use in wellbores drilled the casing splitter. Because the lower bores of the casing splitter are parallel, may of convenient to anchor the liners therein. Multiple liner strings in the wellbores drilled through the casing splitter typically be telescoped in progressively stepped down wellbore In a further aspect the present invention, the casing may a 13xe2x85x9cxe2x80x3 casing formed an upper end and a 9⅝xe2x80x3 flush joint threaded casing connection formed on a lower end thereof. Recesses may be outwardly from both of 8xc2xdxe2x80x3 orthogonally the other 8xc2xdxe2x80x3 aid in locating and securing the a still further aspect of the present invention, to individual may be achieved using a bent or a diverter may be disposed in the splitter. The diverter may be positioned to permit access between the 13xe2x85x9cxe2x80x3 casing connection and the 8xc2xdxe2x80x3 bores while access between the casing and other A latch mule-shoe may be placed on the outside of the diverter, and matching profile machined on the inside of the casing splitter, in These and other advantages, benefits and objects the invention will become apparent of skill upon consideration the detailed description of representative embodiment of the invention and the accompanying drawings. of generating THz (terahertz) radiation, in particular by a conversion crystal device with optical input providing and generating the THz radiation by an optical-to-THz-conversion process. Furthermore, the relates to source apparatus, being adapted for generating THz radiation comprising an input radiation device and a
3 casing string before it is insTalled.
In anOther AspEct Of The pReseNt invention, welLBoreS may be drilled through onE or moRe LOwer COnNectiOns of thE CaSINg sPlItTer. siNCe Only oNe sTandard Casing size Is sKiPped when utilIZiNg the casinG spLitter, multipLe sTandarD lIneR Sizes Are AvailAble foR Use in wEllbores dRiLLed belOW the casING sPlitTer. Because the loweR BoREs of the casing sPlitteR aRE pARAllEl, tHey may be of AnY convENient leNGtH TO AncHOr the liners thErein. MultipLE liNer strInGs iN The welLboreS dRIllEd through thE casIng splittEr woulD TypicalLY be teleScoped In pRogRessIVeLy StePpED doWN wEllBOre DiameterS.
IN a FurthEr asPECT Of thE prEsenT inveNtion, the casinG spLittER maY have A 13xe2x85x9Cxe2x80X3 tHreadEd casiNg conNeCtion formed on an UppeR end thereOf, aNd A 9⅝xe2X80x3 Flush JOint thReaDed Casing cOnnectiON foRmED ON a Lower end thereof. RecEsSES mAy be machIned ouTWaRdLY from one Or BotH of tHE 8Xc2xdxE2x80x3 bOReS orthogoNally tO ThE oTher 8xc2xDxE2x80x3 borE tO aiD in LocatINg anD securIng the suBsequENt liners.
In a stiLL further aspecT Of THE pREsenT inVention, acceSs to INdivIduaL LaTerALs may Be achIeVEd USing a bent sub, or a diveRtEr may bE dispOsed in the casiNg splitter. tHE Diverter May bE PoSItioned to permiT acceSs between tHE 13xe2x85x9cxe2X80x3 casIng conneCtion and oNE Of the 8xc2xDxe2X80x3 bOreS whILE pReventing acceSS BetwEeN the 13xe2x85X9cxE2x80x3 casiNg cOnnEctIon AnD the other Bore. A latCh Or MuLe-ShoE may bE Placed on ThE ouTsIde Of the DIverteR, and a MatcHiNg PRofIle machINeD ON the InSiDe of The CaSing sPlitTEr, tO assist In orientaTioN.
thesE aNd Other feAtures, advantaGeS, benefits aNd ObjEcts of THE present Invention will become appaREnt to onE of OrdinAry sKill in the Art Upon caRefUL consiDeratiOn of tHe DetAILed deSCRiPtiOn Of a represeNTAtiVe embOdImenT of the iNvention hereinbeloW And The accompanyiNg dRawiNGS. THe iNVeNTioN rELatES To methods of geneRating THz (tErAHeRtz) radiatiON, in PaRticulaR by irraDiatiNG a conveRsion crysTal device WiTh opTICal Input radiaTion provIding and gENeratINg The THZ raDiatioN bY an OpticAl-to-THZ-ConVersiOn procEsS. FurthErmorE, tHe inventIon relates to a THz source aPparatUs, beiNg aDapted for GenERatIng THz radIatiOn and comprIsiNg aN inpuT raDIatioN souRCe DevICe and A
3 casing string before itis install ed.
I n a not he r as pect  of the presen t  inv ention, wellbores maybe dr il l ed t h ro ugh o ne or m o re l owe rco nne ct i on s ofthe  casing  splitter.  Si nc e only one s t an dard casin g s ize is skipp edwhen u ti liz i ng th e c asing  split t er, mu ltiple st an d ard li n er size s ar e av ailable for use i n  w e llbores drille d belo wt he c asi ngsplitter.Be cause the low e rb o r eso f the casingsplitter ar e  pa rallel ,the y  may b e ofan y  co nvenient le ngth  to ancho r thel iners t h erein.Multip lelin er s t ri ng s i nt hew el lbo r esdrilledth ro ugh t he c a s i n g sp lit terwould  typically be  te lesc o ped  in p rogre ssiv el y ste pped d own w el lbore diameters .
In  a furthe r a sp ect  o f the presen t i nve ntion,the cas i ngsp l i t te r may have a 13xe2 x8 5 x 9c xe2x80x3  threa d ed  c a sing con ne cti on f o r med o n an up per endthereo f ,an d a 9⅝x e2 x80x3fl ush  jo int t h read ed cas ing conn ectio n  formed on a l o wer end there o f. R ec e sses  ma y be machin ed o u twar dlyf ro m o n e orbothof th e  8xc2xdxe2x80x3 bor es  ortho gonal ly to the oth er 8xc2xdx e 2 x 80x3 bor e to ai d  in locating a nd se curing the subseque nt li ners.
In  a stillf u rther as pec t o f t hep r es ent invention , acce ss  to ind ivi dual la ter als  ma y b eachievedusing abe nt  s ub , o r a d i verter m ay  be  d isp osedi n thecasin g sp li tt e r.The div e rt e r  may  b eposi tio ne d toperm i t a ccess b etween th e 1 3 xe2x 85 x9 cxe2x80 x3 casing con ne ction andon e o f the8 x c2xdxe2x 80x3 bores while preven t ing acc ess  betw eenthe 13xe2 x85 x9cxe2 x80 x 3 casi ng con necti on  an d the o t h er  bo re . A latcho r  mu le-sh oe  may  be pla ced on the outside ofthe diverter,  an d am a tc hin g  p r ofi le mac h i ned on the insi de of theca s in g splitter ,  to  a ssist i n orien tatio n .
These  and othe r feature s,  adv a n tag es, benefi ts and o bjects of the p r es ent i nve ntionwi llbecom e appa r ent  to o ne ofor dinary  skil lin the a rt upon careful conside ration  of t hedetaileddes c rip tion of a  rep resentativ e e mbo dimen t o f  theinve n ti onh erein belo w  and thea cc omp a n yi ng drawings . T heinven tio n  relat es t o methods of gene r ating THz (ter aher t z ) r adi a tion ,in particularbyir r a diatingaconversioncrystalde v ice w ith op ticalinput r a d ia t ion pr ovid ing  and gene rat in g  the TH zra d iation  byan  optic al-to- T Hz-c o n version process.  Furt h e rmore ,  th e inv en tion re l ates  to a THzsource appa ratus,  bei ng ad apted f or  gener ati ng  THz radia t ion and c ompri sing an  i nput  ra diatio n so u r ce de vice  a nda
3 casing_string before_it is installed.
In another_aspect of_the_present invention,_wellbores_may be drilled_through one or_more lower connections of_the casing splitter._Since_only one standard casing size is skipped when utilizing the casing splitter, multiple standard_liner_sizes are_available_for_use in wellbores drilled below_the casing splitter. Because the_lower bores_of the casing splitter are parallel, they may_be_of any convenient_length to anchor the liners therein. Multiple liner strings_in the wellbores drilled through the_casing splitter would_typically_be_telescoped in progressively stepped_down wellbore diameters.
In a further aspect_of the present invention, the casing_splitter may have a 13xe2x85x9cxe2x80x3 threaded casing_connection formed on an upper end_thereof, and a 9⅝xe2x80x3 flush_joint threaded_casing connection formed on a_lower end thereof._Recesses may_be machined outwardly_from one or both of the_8xc2xdxe2x80x3 bores orthogonally_to the other 8xc2xdxe2x80x3 bore to_aid_in locating and_securing_the_subsequent liners.
In_a still further_aspect_of the_present_invention, access to individual laterals may_be_achieved using a bent sub, or a_diverter may be disposed_in_the casing splitter. The_diverter may be positioned to_permit access between the 13xe2x85x9cxe2x80x3 casing_connection and_one of_the 8xc2xdxe2x80x3 bores while preventing access between the 13xe2x85x9cxe2x80x3 casing connection_and the other bore. A latch_or mule-shoe may be_placed on_the_outside of the_diverter,_and a_matching profile machined on the inside of_the casing_splitter, to assist in orientation.
These and_other features, advantages, benefits_and_objects of the present invention will_become apparent to one of ordinary_skill in the art upon_careful_consideration_of the detailed description of_a representative embodiment of the invention_hereinbelow and the_accompanying drawings. The invention relates to methods_of_generating THz (terahertz) radiation, in particular_by_irradiating a conversion crystal device with_optical_input_radiation providing and generating the_THz radiation by an optical-to-THz-conversion process._Furthermore, the invention relates to a THz source apparatus,_being adapted for_generating THz radiation and comprising_an_input_radiation source device and a