Casingyakakosha kumidziyo yekuchera mafuta, uye midziyo yayo huru inosanganisira drill, core pombi uye casing, drill makola uye kudhirowa diki dhayamita simbi pombi uye zvichingodaro.

Iyo casing inoshandiswa kutsigira mafuta uye gasi rusvingo rwepombi, kuve nechokwadi kuti kuchera uye kupedzwa kwemaitiro ekushanda kwakajairika kwematsime.Zvichienderana nekuchera imwe neimwe tsime kudzika uye geological mamiriro, kushandisa akati wandei akaturikidzana casing.Casing cementing inodzika pasi mushure mekuishandisa netubing, pombi yekuchera zvakasiyana, haigone kushandiswazve, imwe-nguva inodyiwa zvinhu.Naizvozvo, iyo yakazara kushandiswa kwekaseji ndeye 70% yemafuta pombi pombi.Casing inogona kukamurwa zvichienderana nekushandiswa: catheter, pamusoro casing, casing uye kugadzira casing.Casing ipombi yakakura-dhayamita, inoridza yakagadziriswa mafuta uye gasi matsime, kana wellbore wall effect.Chibhorani chinopinzwa mugomba retsime, chinogadzikwa nesamende kudzivirira kuumbika uye chibhorani chakapatsanuka kuti chibhorani chikoromoke uye kuita kuti madhaka ekuchera aenderere kunocherwa.

Casing inonyanya kushandiswa kuchera matsime emafuta panguva yekuchera uye mushure mekupedzwa kwerutsigiro rwemadziro kuti ive nechokwadi chekuti maitiro ekuchera uye kupedzwa kwematsime mushure menguva dzose oiri casing yakajairika kushanda.OCTG inonyanya kushandiswa kuchera mafuta uye gasi tsime uye mafuta uye gasi kutakura.Inosanganisira pombi yekuchera mafuta, casing yemafuta, pombi yepombi.Mapombi ekuchera oiri anonyanya kushandiswa kubatanidza chibooreso collar uye chibooreso uye kupfuudza simba rekuchera.Casing inonyanya kushandiswa pakuchera uye kupedzisa kwerudyi rusvingo rwerutsigiro, kuve nechokwadi kuti mufambiro uye kupedzwa kwekuchera mushure mekushanda kwemaitiro ematsime.Kupomba matsime pazasi petubhing kuchanyanya mafuta, gasi rinotakurwa pasi.Casing ndeyekuchengetedza matsime ekufambisa nzira yehupenyu.Sezvakasiyana geological mamiriro, pasi pevhu yakaoma kushushikana mamiriro, kudhonza, kudzvanya, kukotama, torsional kushushikana kunobata pane yakasanganiswa mhedzisiro yechubhu, iyo iyo casing pachayo, kunaka kwepamusoro zvinodiwa.Kana iyo casing pachayo yakuvadzwa nekuda kwechimwe chikonzero, inogona kutungamira kumatsime ekugadzira ese, kana kutoputswa.