Izinhlobo ezahlukene zeizikhwama zamafuthazisetshenziswa ohlelweni lokuxhashazwa kukawoyela: amagobolondo kawoyela angaphezulu avikela umthombo emanzini angashoni nokungcoliswa kwegesi, asekela imishini ye-wellhead futhi agcine isisindo sezinye izingqimba zama-casings.Ibhokisi likawoyela lobuchwepheshe lihlukanisa ingcindezi yezendlalelo ezihlukene ukuze uketshezi lokumba lukwazi ukugeleza ngokujwayelekile futhi luvikele isikhwama sokukhiqiza.Ukuze ufake i-anti-burst device, idivayisi yokuqinisekisa ukuvuza kanye nolayini lapho kubholwa khona.Isetshenziselwa ukuvikela ukumba nokuhlukanisa udaka lokumba.Ekukhiqizeni isikhwama samafutha, ububanzi bangaphandle ngokuvamile buba ngu-114.3 mm kuya ku-508 mm.

Ukulawulwa kwezinga lokushisa okuhlukile kukhethiwe ku-oyela casing esigabeni sokushisa esihlukene, futhi ukushisa kudinga ukwenziwa ngokuya ngokushisa okuthile.I-AC1 yensimbi engu-27MnCrV ingu-736 ℃, i-AC3 ingu-810 ℃, izinga lokushisa elipholile lingu-630 ℃ ngemva kokucisha, futhi isikhathi sokubamba ukushisa okushisayo ngu-50min.Izinga lokushisa lokushisa likhethwa phakathi kuka-740 ℃ no-810 ℃ ngesikhathi sokucisha izinga lokushisa elincane.Izinga lokushisa elincane lokucisha izinga lokushisa ngu-780 ℃ futhi isikhathi sokubamba ngu-15min;ngenxa yokuthi ukucima kwezinga lokushisa elincane kuyashiswa endaweni yezigaba ezimbili ze-α + γ, ukuqina kungathuthukiswa ngenkathi kugcinwa izinga lokushisa.Isikhwama sikawoyela siyindlela yokuphila yokusebenza komthombo kawoyela.Ngenxa yezimo ezihlukene zejoloji, isimo sokucindezeleka kwe-downhole siyinkimbinkimbi, futhi ukushuba, ukucindezelwa, ukugoba kanye nezingcindezi ze-torsion kusebenza ngokugcwele emzimbeni wepayipi, okubeka phambili izidingo eziphakeme zekhwalithi ye-casing ngokwayo.Uma i-casing ngokwayo ilimele ngesizathu esithile, ukukhiqizwa kwawo wonke umthombo kungase kuncishiswe noma kukhishwe.Ngokusho kwamandla ensimbi, i-casing ingahlukaniswa ngamamaki ahlukene, okuyi-J55, K55, N80, L80, C90, T95, P110, q125, V150, njll. Izimo ezihlukene zemithombo kanye nokujula kwemithombo kuholela emazingeni ahlukene ensimbi.Ezimweni ezigqwalile, i-casing ngokwayo iyadingeka ukuze ibe nokuvikeleka kokugqwala.Ezindaweni ezinezimo ze-geological eziyinkimbinkimbi, i-casing nayo iyadingeka ukuze ibe nokumelana nokuwa kanye nokumelana nokuguguleka kwe-microbial.Ipayipi likawoyela elikhethekile lisetshenziselwa ikakhulukazi ukumba imithombo kawoyela negesi kanye nokuthutha uwoyela negesi.Kuhlanganisa ipayipi lokumba uwoyela, isikhwama sikawoyela kanye nepayipi lokumpompa uwoyela.

Ipayipi lokubhola likawoyela lisetshenziselwa ikakhulukazi ukuxhuma ikhola yokubhoboza kanye nebhithi kanye nokudlulisa amandla okumba.Igobolondo likawoyela lisetshenziselwa ngokuyinhloko ukusekela umthombo ngesikhathi sokumba nangemuva kokuphothulwa, ukuze kuqinisekiswe ukusebenza okuvamile kwawo wonke umthombo ngemva kokubhola nokuqedwa.Uwoyela negesi ngaphansi komthombo kawoyela kuhanjiswa kakhulu phezulu ngokumpompa amashubhu.Phakathi kobude be-LC nendawo eshabalalayo yentambo, kuvunyelwe ukuthi isici singadluli ngaphansi kwekhoni yobubanzi obuphansi bentambo noma abukho ngaphezu kuka-12.5% ​​wobukhulu obubekiwe bodonga (noma yikuphi okukhulu), kodwa akukho mkhiqizo wokugqwala. kuvunyelwe phezu kwentambo.I-chamfer yangaphandle yokuphela kwepayipi (65 °) izophelela kumjikelezo wepayipi ongu-360 °.Ububanzi be-chamfer buyokwenza impande yentambo inyamalale endaweni ye-chamfer esikhundleni sobuso bokugcina bepayipi, futhi akumele kube khona umphetho.

I-chamfering yangaphandle yokuphela kwepayipi ingu-65 ° kuya ku-70 ° futhi i-chamfering yangaphakathi yokuphela kwepayipi ingu-360 ° futhi i-chamfering yangaphakathi ingu-40 ° kuya ku-50 ° ngokulandelanayo.Uma kukhona noma iyiphi ingxenye engaguquliwe, i-chamfering izofakwa ngesandla.Igobolondo lifakwa emgodini bese lihlanganiswa ngosimende ukuvimbela imbobo ekuhlukaniseni i-strata kanye ne-borehole, futhi kuqinisekiswe ukujikeleza kodaka lokumba, ukuze kube lula ukumba nokuxhashazwa.Amabanga ensimbi we-casing kawoyela: H40, J55, K55, N80, L80, C90, T95, P110, q125, V150, njll. Ifomu lokucubungula ukuphela kwe-Casing: intambo eyisiyingi emfishane, intambo eyindilinga ende, intambo ye-trapezoidal, intambo ekhethekile, njll. ikakhulukazi isetshenziselwa ukusekela umthombo ngesikhathi sokumba nangemuva kokuqedwa, ukuze kuqinisekiswe ukusebenza okuvamile kwawo wonke umthombo wamafutha ngemva kokubhola nokuqedwa.