Danniya akan API 5CTrumfar maia cikin rijiyar mai: don tabbatar da cewa kwandon da ke gudana a cikin rijiyar yana ci gaba da ci gaba, ba fashe ko gurɓatacce ba, ana buƙatar akwati don samun wani ƙarfi, isa don tsayayya da ƙarfin waje da yake karɓa. Sabili da haka, ya zama dole don nazarin damuwa a kan suturar rijiyar ciki.

1) Karfin ja
2) Ƙarfin fitarwa
3) Matsin ciki
4) Karfin lankwasa

A ƙarshe, akwatin da ke cikin rijiyar ya fi ɗaukar ƙarfi uku na farko. Yanayin damuwa na sassa daban-daban sun bambanta, ɓangaren babba yana karɓar ƙarfin ja, ƙananan ɓangaren yana da ƙarfin matsawa na waje, kuma ɓangaren tsakiya yana karɓar ƙananan ƙarfin waje. Lokacin zayyana kirtani na casing, an zaɓi ƙimar ƙarfe da kaurin bango na casing bisa la'akari da abin da ke sama na aminci. Don madaidaicin casing na API, babban mahimmancin aminci don tensile shine 1.6-2.0, ma'aunin aminci don juriya mai tasiri shine 1.00-1.50, gabaɗaya 1.125, ƙimar aminci don matsa lamba na ciki shine 1.0-1.33, kuma yanayin aminci don juriya na matsawa. a wurin allurar siminti shine ƙimar da ake so shine 0.85. Ya kamata a jaddada cewa an zaɓi abin da ke cikin aminci a cikin ƙirar ƙarfin kirtani na casing a hankali bisa ga yankin, stratum da kuma aikin hakar mai da kuma samar da iskar gas. Mutum ne mai kima. Saboda nau'ikan rundunonin waje daban-daban da aka yi amfani da su a sama, tsakiya da ƙananan sassa na kirtani na casing, igiyoyin casing ɗin da aka ƙera sau da yawa suna da kauri ko fiye da ma'aunin ƙarfe a cikin bangon sama da na ƙasa, kuma akasin su a tsakiya, don haka dole ne a ƙidaya. da casing. A cikin wannan rijiyar. A mafi yawan lokuta, casing yana aiki a cikin kafofin watsa labarai masu lalata. Sabili da haka, ban da buƙatar takamaiman ƙarfin haɗin gwiwa, ana buƙatar casing don samun kyakkyawan aikin hatimi kuma don tsayayya da lalata.