Casingibalulekile kwizixhobo zokomba ioyile, kwaye izixhobo zayo eziphambili ziquka i-drill, i-core pipe kunye ne-casing, i-collars drill kunye nokugrumba umbhobho wensimbi omncinci wentsimbi njalo njalo.

I-casing isetyenziselwa ukuxhasa udonga lweoli kunye negesi yombhobho, ukuqinisekisa ukuba ukugaya kunye nokugqitywa kwenkqubo yokusebenza okuqhelekileyo kwamaqula.Kuxhomekeke ekwembizeni ubunzulu bomthombo ngamnye kunye neemeko zejoloji, ukusebenzisa iileya ezininzi ze-casing.I-casing cementing yehla emva kokuyisebenzisa nge-tubing, i-drill pipe iyahluka, ayinakuphinda isetyenziswe, izinto ezidliwayo ngexesha elinye.Ngoko ke, ukusetyenziswa ngokupheleleyo kwe-casing yi-70% yombhobho weoli yeoli.I-Casing inokwahlulwa ngokusetyenziswa: i-catheter, i-surface casing, i-casing kunye ne-casing yemveliso.I-Casing ngumbhobho wobubanzi obukhulu, dlala i-oyile engatshintshiyo kunye negesi yegesi, okanye isiphumo sodonga lwe-wellbore.Iqula lifakelwa kumngxuma wequla, lilungiswe ngesamente ukunqanda ukubumbeka kunye nokudilika komngxuma wokutsala isithuba kunye nokuqinisekisa ukujikeleza kodaka lokomba ukuya kwindawo yokomba.

I-Casing isetyenziselwa kakhulu ukugaya i-oyile ngexesha lokugaya kwaye emva kokugqitywa kwodonga lwenkxaso ukuqinisekisa ukuba ukuqhutyelwa kwenkqubo yokugaya kunye nokugqitywa kwemigodi emva kokusebenza okuqhelekileyo kwe-oyile ye-oyile.I-OCTG isetyenziselwa ikakhulu ukugrumba i-oyile nerhasi kunye nokuthuthwa kweoyile negesi.Iquka umbhobho wokwemba ioyile, i-oyile ye-oyile, i-tubing yepompo.Imibhobho ye-oyile ye-oyile isetyenziselwa ukudibanisa i-collar ye-drill kunye ne-drill kunye nokudlula amandla okugaya.I-Casing isetyenziselwa ukugaya kunye nokugqitywa kodonga oluchanekileyo lwenkxaso, ukuqinisekisa ukuba ukuqhuba kunye nokugqitywa kwenkqubo yokugaya emva kokusebenza okuqhelekileyo kwamaqula.Ukumpompa amaqula emazantsi etyhubhu kuya kuthi ikakhulu ioyile, irhasi ihanjiswe emhlabeni.I-Casing kukugcina amaqula aqhuba ubomi.Njengeemeko ezahlukeneyo zejoloji, urhulumente woxinzelelo onzima ophantsi komhlaba, ukutsala, ukucinezela, ukugoba, uxinzelelo lwe-torsional olusebenza kwisiphumo esidibeneyo sombhobho, apho i-casing ngokwayo, umgangatho weemfuno eziphezulu.Xa isingxobo ngokwaso sonakaliswe ngenxa yesizathu esithile, sinokukhokelela ekubeni yonke imingxuma yemveliso, okanye ichithwe.