Iindidi ezahlukeneyo zeiingxowa zeolizisetyenziswa kwinkqubo yokusetyenziswa kwe-oyile: ii-oyile ezingaphezulu zikhusela iqula kumanzi angekho nzulu kunye nongcoliseko lwerhasi, zixhasa izixhobo ze-wellhead kunye nokugcina ubunzima bezinye iileyile ze-casings.I-oyile ye-oyile yezobugcisa ihlukanisa uxinzelelo lwemigangatho eyahlukeneyo ukwenzela ukuba i-drilling fluid ikwazi ukuhamba ngokuqhelekileyo kwaye ikhusele i-casing yemveliso.Ukuze ufakele isixhobo sokunqanda ukugqabhuka, isixhobo sobungqina bokuvuza kunye nelinen ekugrumbeni.Isetyenziselwa ukukhusela ukugrumba kunye nokwahlula udaka lokwemba.Kwimveliso ye-oyile ye-oyile, ububanzi bangaphandle ngokuqhelekileyo bu-114.3 mm ukuya kwi-508 mm.

Ukulawula ukushisa okuhlukeneyo kukhethwe kwi-oyile ye-oyile kwicandelo lobushushu obuhlukeneyo, kwaye ukufudumeza kufuneka kuqhutywe ngokweqondo elithile lokushisa.I-AC1 ye-27MnCrV intsimbi yi-736 ℃, i-AC3 yi-810 ℃, iqondo lokushisa ngu-630 ℃ emva kokucima, kunye nexesha lokufudumeza lokufudumala yi-50min.Ubushushu bokufudumala bukhethwa phakathi kwe-740 ℃ kunye ne-810 ℃ ngexesha lokucima ubushushu obuphantsi.Iqondo lokushisa elincinci lokucima i-780 ℃ kunye nexesha lokubamba yi-15min;ngenxa yokuba ukucima ukushisa okuncinci kushushu kwindawo ye-α + γ yesigaba sesibini, ukuqina kunokuphuculwa ngelixa kugcinwa ubushushu.Iqokobhe le-oyile yindlela yokuphila yokusebenza komthombo we-oyile.Ngenxa yeemeko ezahlukeneyo zejoloji, imeko yoxinzelelo lwe-downhole intsonkothile, kwaye uxinzelelo, ukucinezelwa, ukugoba kunye noxinzelelo lwe-torsion lusebenza kumzimba wombhobho ngokubanzi, okubeka phambili iimfuno eziphezulu kumgangatho we-casing ngokwayo.Emva kokuba i-casing ngokwayo yonakaliswe ngenxa yesizathu esithile, ukuveliswa kwequla lonke kunokuncitshiswa okanye ukuchithwa.Ngokwamandla entsimbi, i-casing inokwahlulwa ibe ngamabakala ahlukeneyo, oko kukuthi, i-J55, i-K55, i-N80, i-L80, i-C90, i-T95, i-P110, i-q125, i-V150, njl.Kwimeko-bume enomhlwa, i-casing ngokwayo iyafuneka ukuba ibe nokumelana nomhlwa.Kwiindawo ezineemeko zejoloji ezintsonkothileyo, i-casing iyafuneka ukuba ibe nokumelana nokuwa kunye nokumelana nokhukuliseko lwemicrobial.Umbhobho weoli okhethekileyo usetyenziselwa ukugrumba imithombo yeoli kunye negesi kunye nokuthutha ioli kunye negesi.Iquka umbhobho wokwemba i-oyile, isingxobo se-oyile kunye nombhobho wokumpompa i-oyile.

Umbhobho wokugaya i-oyile usetyenziswa ikakhulu ukudibanisa ikhola kunye nebit kunye nokudlulisa amandla okomba.I-oil casing isetyenziselwa kakhulu ukuxhasa iqula ngexesha lokugaya nasemva kokugqitywa, ukwenzela ukuba kuqinisekiswe ukusebenza okuqhelekileyo kwequla lonke emva kokugaya nokugqitywa.I-oyile kunye negesi ephantsi kwequla le-oyile ihanjiswa ikakhulu kumphezulu ngokumpompa iityhubhu.Phakathi kobude be-LC kunye nendawo yokunyamalala yentambo, kuvunyelwe ukuba isiphene singanwebeki ngaphantsi kwekhowuni ye-diameter ephantsi yentambo okanye ayikho ngaphezu kwe-12.5% ​​yobukhulu bodonga oluchaziweyo (nokuba yeyiphi na enkulu), kodwa akukho mveliso yokubola. ivumelekile kumphezulu womsonto.I-chamfer yangaphandle yesiphelo sombhobho (65 °) iya kugqitywa kwi-360 ° yesangqa yesiphelo sombhobho.I-diameter ye-chamfer iya kwenza ukuba ingcambu yentambo ingabikho kumphezulu we-chamfer endaweni yobuso besiphelo sombhobho, kwaye akuyi kubakho ngqameko.

I-chamfering yangaphandle yesiphelo sombhobho yi-65 ° ukuya ku-70 ° kwaye i-chamfering yangaphakathi yesiphelo sombhobho yi-360 ° kunye ne-chamfering yangaphakathi yi-40 ° ukuya ku-50 ° ngokulandelelanayo.Ukuba kukho nayiphi na indawo engaguqukiyo, i-chamfering iya kufakwa ngesandla.Iqula lifakwa kumngxuma wesitsala-manzi lize lilungiswe ngesamente ukunqanda umngxuma wokutsala amanzi ekwahluleni istrata kunye nokudilika kwamaqula, nokuqinisekisa ukujikeleziswa kodaka lokombiwa, ukuze kube lula ukugrunjwa nokuxhaphazwa.Amabakala ensimbi ye-oyile ye-oyile: H40, J55, K55, N80, L80, C90, T95, P110, q125, V150, njl. njl. isetyenziselwa ikakhulu ukuxhasa i-wellbore ngexesha lokugaya nasemva kokugqitywa, ukwenzela ukuba kuqinisekiswe ukusebenza okuqhelekileyo kweoli yeoli emva kokubhoboza nokugqitywa.