Daban-daban irirumbun maiana amfani da su a cikin aiwatar da amfani da mai: tulin mai na saman yana kare rijiyar daga ruwa mara kyau da gurɓataccen iskar gas, tallafawa kayan aikin rijiyar da kula da nauyin sauran nau'ikan casings.Kayan aikin man fetur na fasaha yana raba matsa lamba na yadudduka daban-daban domin ruwan hakowa zai iya gudana akai-akai kuma ya kare kullun samarwa.Domin shigar da na'urar hana fashewa, na'urar da za ta iya zubar da ruwa a cikin hakowa.Ana amfani da shi don kare hakowa da raba laka mai hakowa.A cikin samar da casing mai, diamita na waje yawanci shine 114.3 mm zuwa 508 mm.

Ana zaɓar sarrafa zafin jiki daban-daban don rumbun mai a cikin sashin zafin jiki daban-daban, kuma ana buƙatar dumama gwargwadon yanayin zafi.AC1 na 27MnCrV karfe ne 736 ℃, AC3 ne 810 ℃, tempering zafin jiki ne 630 ℃ bayan quenching, da kuma tempering dumama rike lokaci ne 50min.Ana zaɓin zafin jiki na dumama tsakanin 740 ℃ da 810 ℃ yayin rage yawan zafin jiki.The sub zafin jiki quenching zafin jiki ne 780 ℃ da rike lokaci ne 15min;saboda ƙananan zafin jiki quenching yana mai zafi a cikin α + γ yanki mai kashi biyu, za'a iya inganta ƙarfin yayin kiyaye zafin jiki.Rijiyar mai ita ce hanyar rayuwar rijiyar mai.Saboda yanayin yanayi daban-daban, yanayin damuwa na downhole yana da wuyar gaske, kuma tashin hankali, matsawa, lankwasawa da damuwa na torsion suna aiki akan bututun gabaɗaya, wanda ke gabatar da buƙatu mafi girma don ingancin casing kanta.Da zarar kwandon kanta ya lalace saboda wasu dalilai, ana iya rage yawan samar da rijiyar gaba ɗaya ko ma a kwashe.Dangane da ƙarfin karfe, ana iya raba casing zuwa maki daban-daban, wato J55, K55, N80, L80, C90, T95, P110, q125, V150, da dai sauransu. Yanayin rijiyoyi daban-daban da zurfin rijiyar suna haifar da nau'ikan ƙarfe daban-daban.A cikin yanayi mai lalacewa, ana buƙatar kashin kanta don samun juriya na lalata.A wuraren da ke da sarƙaƙƙiyar yanayin yanayin ƙasa, ana kuma buƙatar kas ɗin don samun juriya na rugujewa da juriya na zaizayar ƙananan ƙwayoyin cuta.Ana amfani da bututun mai na musamman don hakar mai da rijiyoyin iskar gas da jigilar mai da iskar gas.Ya hada da bututun hako mai, rumbun mai da bututun mai.

Ana amfani da bututun mai don haɗa abin wuya da bit da kuma canja wurin ikon hakowa.Ana amfani da rumbun mai ne musamman wajen tallafawa rijiyoyin rijiyar yayin da ake hakowa da kuma bayan kammalawa, ta yadda za a tabbatar da aikin gaba dayansa bayan hakowa da kammalawa.Man fetur da iskar gas da ke kasan rijiyar mai ana kai su ne ta hanyar yin famfo tubing.Tsakanin tsawon LC da ɓataccen batu na zaren, an ba da izinin cewa lahani bai wuce ƙasa da mazugi na diamita na zaren ƙasa ba ko bai fi 12.5% ​​na ƙayyadadden kauri na bango ba (duk wanda ya fi girma), amma babu samfurin lalata. an yarda a saman zaren.A waje chamfer na bututu karshen (65 °) za a kammala a kan 360 ° kewaye da bututu karshen.Diamita na chamfer zai sa tushen zaren ya ɓace a saman chamfer maimakon a ƙarshen fuskar bututu, kuma babu wani gefen.

A waje chamfering na bututu karshen ne 65 ° zuwa 70 ° da ciki chamfering na bututu karshen ne 360 ​​° da ciki chamfering ne 40 ° zuwa 50 ° bi da bi.Idan akwai wani ɓangaren da ba a juyo ba, za a shigar da chamfer ɗin da hannu.Ana shigar da rumbun a cikin rijiyar burtsatse a gyara shi da siminti don hana rijiyar raba matsuguni da rugujewar rijiyoyin burtsatse, da tabbatar da zagayawan laka, ta yadda za a samu saukin hakowa da amfani da su.Karfe maki na casing mai: H40, J55, K55, N80, L80, C90, T95, P110, q125, V150, da dai sauransu Casing karshen aiki form: short zagaye thread, dogon zagaye thread, trapezoidal thread, musamman zare, da dai sauransu It ana amfani da shi ne don tallafawa rijiyoyin rijiyoyin a lokacin hakowa da kuma bayan kammalawa, ta yadda za a tabbatar da yadda rijiyar mai baki daya ke aiki yadda ya kamata bayan hakowa da kammalawa.