Mhando dzakasiyana dzemidziyo yemafutaanoshandiswa mukuita kwekushandiswa kwemafuta: pamusoro pemafuta casings anodzivirira tsime kubva kumvura isina kudzika uye kusvibiswa kwegasi, tsigira midziyo yemumusoro uye kuchengetedza huremu hwemamwe maturu emakasi.Iyo tekinoroji yemafuta casing inoparadzanisa kudzvanywa kweakasiyana akaturikidzana kuitira kuti mvura yekuchera ikwanise kuyerera zvakajairwa uye kudzivirira iyo yekugadzira casing.Kuti uise anti burst mudziyo, leak proof mudziyo uye liner mukuchera.Inoshandiswa kuchengetedza kuchera uye kuparadzanisa dhaka rekuchera.Mukugadzirwa kwemafuta casing, dhayamita yekunze inowanzoita 114.3 mm kusvika 508 mm.

Yakasiyana tembiricha yekudzora inosarudzwa yemafuta casing mune akasiyana tembiricha chikamu, uye kupisa kunofanirwa kuitwa zvinoenderana nekumwe tembiricha.AC1 ye27MnCrV simbi i736 ℃, AC3 i810 ℃, tempering tembiricha i630 ℃ mushure mekudzima, uye kudziyisa kupisa kunobata nguva i50min.Iyo tembiricha yekudziya inosarudzwa pakati pe740 ℃ uye 810 ℃ panguva yekudzima tembiricha.Iyo tembiricha yekudzima tembiricha i780 ℃ uye nguva yekubata i15min;nekuti iyo sub tembiricha kudzimwa kunopisa munzvimbo α + γ maviri-chikamu dunhu, iyo kuoma kunogona kuvandudzwa uchichengetedza tembiricha.Oiri casing ndiyo nzira yehupenyu yekushanda kwetsime reoiri.Nekuda kwemamiriro akasiyana e geological, iyo downhole stress state yakaoma, uye tension, compression, bending and torsion stresses zvinoshanda pamuviri wepombi zvakazara, izvo zvinoisa pamberi pepamusoro zvinodiwa zvemhando yecasing pachayo.Kana iyo casing pachayo yakuvadzwa nekuda kwechimwe chikonzero, kugadzirwa kwegomba rose kunogona kudzikiswa kana kurasirwa.Maererano nesimba resimbi, iyo casing inogona kugoverwa muzvikamu zvakasiyana, zvinoti J55, K55, N80, L80, C90, T95, P110, q125, V150, etc. Mamiriro ezvinhu akasiyana-siyana uye tsime rakadzika rinotungamirira kune zvakasiyana-siyana zvesimbi.Munzvimbo ine corrosive, casing pachayo inodiwa kuti ive necorrosion resistance.Munzvimbo dzine mamiriro akaomarara e geological, casing inodiwawo kuve nekuputsika kwekuramba uye microbial erosion resistance.Iyo yakakosha pombi yemafuta inonyanya kushandiswa kuchera mafuta uye gasi matsime uye kutakura mafuta uye gasi.Inosanganisira pombi yekuchera mafuta, casing yeoiri uye pombi yekupomba mafuta.

Oiri yekubooresa pombi inonyanya kushandiswa kubatanidza chibooreso collar uye bhiti uye kutamisa simba rekuchera.Oiri casing inonyanya kushandiswa kutsigira tsime panguva yekuchera uye mushure mekupedzwa, kuitira kuve nechokwadi chekushanda kwakajairika kwetsime rose mushure mekuchera uye kupera.Oiri negasi zviri pasi petsime reoiri zvinonyanya kutakurwa kuenda pamusoro nekupomba tubing.Pakati pehurefu hweLC uye nzvimbo inoparara yeshinda, zvinotenderwa kuti chirema hachipfuurire pazasi pekoni yeshinda yezasi dhayamita kana kuti haina kukura kupfuura 12.5% ​​yeyakatsanangurwa madziro ukobvu (chero yakakura), asi hapana corrosion chigadzirwa. inobvumirwa pamusoro peshinda.Iyo yekunze chamfer yepombi inopera (65 °) ichave yakakwana pa 360 ° denderedzwa yepombi kupera.Iyo dhayamita yechamfer ichaita kuti mudzi weshinda unyangarike pamusoro pechamfer pachinzvimbo chepamusoro pechiso chepombi, uye hapazove nemupendero.

Iyo yekunze chamfering yepombi inopera ndeye 65 ° kusvika 70 ° uye yemukati chamfering yepombi inopera ndeye 360 ​​° uye yemukati chamfering ndeye 40 ° kusvika 50 ° zvichiteerana.Kana paine chero chikamu chisina kutenderedzwa, iyo chamfering ichaiswa nemaoko.Chibhorani chinopinzwa muchibhorani chogadzikwa nesamende kudzivirira chibhorani kuti chiparadzanise chibhorani negomba, uye kuona kutenderera kwedhaka rekuchera, kuitira kuti kuchera nekushandiswa kuve nyore.Simbi mamakisi emafuta casing: H40, J55, K55, N80, L80, C90, T95, P110, q125, V150, etc. Casing end processing form: pfupi kutenderera shinda, refu yakatenderera shinda, trapezoidal shinda, yakakosha shinda, nezvimwe. inonyanya kushandiswa kutsigira tsime panguva yekuchera uye mushure mekupedza, kuitira kuti kuve nechokwadi chekushanda kwese kwese kwemafuta zvakanaka mushure mekuchera uye kupera.