Ukwelashwa kokushisa kuyinqubo ebaluleke kakhulu ekucutshungulweni kwe-oyela casing. Ukuthi ukusebenza kanye nekhwalithi yomkhiqizo oqediwe kungahlangabezana nezinga kuncike kakhulu emiphumeleni yokwelashwa kokushisa. Ngakho-ke, abakhiqizi abahlukahlukene banezidingo eziqinile kakhulu kwinqubo yokwelapha ukushisa futhi bangabi nobudedengu. Kwesinye isikhathi kungacinywa futhi ngokucisha izinga lokushisa eliphansi. Ukucisha izinga lokushisa eliphansi kungasusa ngempumelelo ingcindezi eyinsalela yesikhwama se-petroleum, akugcini nje kuphela ukunciphisa izinga lokuguquguquka kwesiqeshana somsebenzi ngemva kokucisha kodwa futhi kungacubungula i-petroleum casing ibe impahla eluhlaza efaneleke kakhudlwana yenqubo yakamuva. Ngakho-ke, impumelelo yamanje yamapayipi e-oyela casing ayinakuhlukaniswa nokwelashwa kokushisa. Kusukela inqubo yokwelapha ukushisa, kungakhathaliseki ukuthi ukuqina komthelela, ukumelana nomonakalo, noma amandla aqinile wamapayipi e-casing kawoyela, athuthuke kakhulu.