Mtengo wa OCTGamagwiritsidwa ntchito kwambiri pobowola chitsime chamafuta ndi gasi komanso kuyendetsa mafuta ndi gasi.Zimaphatikizapo chitoliro chobowola mafuta, chosungira, chopopera machubu.Mapaipi obowola mafuta amagwiritsidwa ntchito makamaka kulumikiza kolala yobowola ndi pang'ono ndikudutsa mphamvu yobowola.Kuyika kwamafuta kumagwiritsidwa ntchito kwambiri pobowola ndikumaliza khoma lambali yothandizira kuti zitsimikizire kuti zitsime zikuyenda bwino pakuyendetsa ndikumaliza kukumba.Machubu amapopa zitsime pansi pa mafuta ndi gasi kufala pansi.

Mafuta a Casing ndiye njira yopulumutsira kuti muyende bwino.Chifukwa cha mikhalidwe yosiyanasiyana ya geological, kupsinjika mobisa kupsinjika ndi kupsinjika, kupindika, komanso kuphatikizika kwa kupsinjika kwapang'onopang'ono komwe kumachitika pa chubu, zomwe zayika patsogolo zofunikira pamtundu wa casing yokha.Chosungiracho chikawonongeka pazifukwa zina, chingayambitse kupanga zitsime, kapena kuchotsedwa.

Malingana ndi mphamvu yachitsulo, casing ikhoza kugawidwa m'magulu osiyanasiyana azitsulo, mwachitsanzo, J55, K55, N80, L80, C90, T95, P110, Q125, V150.Ndi zina zotero.Zinthu zabwino, kuya kosiyana kwa kalasi yachitsulo kumakhalanso kosiyana.Imafunikanso choyikapo m'malo owononga omwe ali ndi kukana kwa dzimbiri.Casing yokhala ndi anti-collapsing performance muzovuta za geological.