Mushure meanoda kusvika makore makumi maviri ekuedza, China'sganda remafutakugadzirwa kubva pakatanga, kubva pamutengo wakaderera kusvika pamutengo wepamusoro, kubva kugiredhi yesimbi yakaderera kusvika kune zvigadzirwa zveAPI zvakatevedzana, uyezve kune zvisiri zve API zvigadzirwa zvine zvakakosha zvinodiwa, kubva pahuwandu kusvika kune kunaka, zviri pedyo nechiyero chemafuta ekunze uye casing zvigadzirwa.Mugove wemusika wepamusha weChina wetsime remafuta tubing wakapfuura 80%, uye chave chigadzirwa kunze kwenyika kwemakore mazhinji.

Zvinoenderana nekugoverwa kwedunhu muChina, kudiwa kweoiri uye casing hakuchina kutariswa mudunhu rekumabvazuva.Kubva pamaonero ebudiriro yeminda yemafuta emumba negasi, kusimukira kweDaqing, Liaohe, Shengli nedzimwe nzvimbo dzemafuta ekuMabvazuva kwatendeukira kukusimudzira minda yemafuta yekuMadokero seSichuan neXinjiang, tichiteerera maitiro eminda yemafuta ekumahombekombe.Pamusoro pezvo, ichakura kubva panyika kuenda kumahombekombe uye kubva kugungwa risina kudzika kusvika kugungwa rakadzika.Mukuwedzera, kudzika kwekuchera kuri kuwedzera uye kudzika, uye basa rekuchera riri kuramba richiwedzera kuoma, uye zvinodiwa zvemafuta uye casing zvinofanira kunge zvakakwirira uye zvakakwirira.

Mhando dzakasiyana dzecasing dzinoshandiswa mukugadzira oiri: pamusoro pemafuta casing - kuchengetedza tsime kubva pakusvibiswa nemvura isina kudzika uye gasi magasi - inotsigira midziyo yemusoro uye kuchengetedza huremu hwemamwe mazinga ecasing.Tekinoroji oiri casing - patsanura kudzvanywa kweakasiyana akaturikidzana, kuitira kuti uve nechokwadi chekutenderera kwakajairika kwekudhirowa kwemvura quota uye kudzivirira iyo yekugadzira casing.-Kuti uise anti burst mudziyo, leak proof mudziyo uye liner mutsime.Oiri casing - mafuta uye gasi zvinotakurwa kubva mudura riri pasi pepamusoro.-Inoshandiswa kuchengetedza tsime uye kuparadzanisa dhaka rekuchera.Mukugadzirwa kwemafuta casing, dhayamita yekunze inowanzoita 114.3 mm kusvika 508 mm.

Musoro wetsime unodzivirirwa nehuremu hwekasi mumvura isina kudzika.

Tekinoroji oiri casing - patsanura kudzvanywa kweakasiyana akaturikidzana, kuitira kuti uve nechokwadi chekutenderera kwakajairika kwekudhirowa kwemvura quota uye kudzivirira iyo yekugadzira casing.-Kuti uise anti burst mudziyo, leak proof mudziyo uye liner mutsime.

Oiri casing - mafuta uye gasi zvinotakurwa kubva mudura riri pasi pepamusoro.-Inoshandiswa kuchengetedza tsime uye kuparadzanisa dhaka rekuchera.Mukugadzirwa kwemafuta casing, dhayamita yekunze inowanzoita 114.3 mm kusvika 508 mm.

Zvinoenderana neSY / t6194-96 "petroleum casing", mafuta casing anogona kupatsanurwa kuita pfupi tambo casing uye kubatana kwayo uye refu tambo casing uye coupling.