Uxinzelelo kwi-API 5CTisitya se-oyilekwiqula leoli: ukuqinisekisa ukuba i-casing egijima emthonjeni iyaqhubeka, ayiqhekekanga okanye iphazamisekile, i-casing iyadingeka ukuba ibe namandla athile, okwaneleyo ukumelana namandla angaphandle ayifumanayo.Ngoko ke, kuyimfuneko ukuhlalutya uxinzelelo kwi-internal well casing.

1) Ukutsala amandla
2) Amandla okukhutshwa
3) Uxinzelelo lwangaphakathi
4) Ukugoba amandla

Ukuqukumbela, i-casing equleni ithwala amandla amathathu okuqala.Iimeko zoxinzelelo lwamalungu ahlukeneyo zihlukile, indawo ephezulu ifumana amandla okutsala, indawo engezantsi inamandla ocinezelo angaphandle, kwaye indawo ephakathi ifumana amandla angaphantsi angaphandle.Xa uqulunqa umtya we-casing, ibakala lensimbi kunye nobukhulu bodonga lwe-casing lukhethwa ngokusekelwe kwingqwalasela engentla yokhuseleko.Kwi-API esemgangathweni ye-casing, i-general security factor for tensile yi-1.6-2.0, into ekhuselekileyo yokumelana nempembelelo yi-1.00-1.50, ngokubanzi i-1.125, i-factor yokhuseleko yoxinzelelo lwangaphakathi yi-1.0-1.33, kunye nokhuseleko lokumelana noxinzelelo. kwindawo yokutofa kwesamente yi Ixabiso elinqwenelekayo yi-0.85.Kufuneka kugxininiswe ukuba inkalo yokhuseleko kuyilo lwamandla entambo ye-casing ikhethwe ngononophelo ngokwengingqi, i-stratum kunye ne-oyile kamva kunye nenkqubo yokuvelisa igesi.Ungumntu onamava.Ngenxa yamandla angaphandle ahlukeneyo asetyenziswa kwiindawo eziphezulu, eziphakathi nasezantsi zomtya we-casing, intambo ye-casing eyilwe idla ngokutyeba okanye ngaphezulu kweendonga zentsimbi kwiindonga ezingaphezulu nezisezantsi, kwaye zichasene embindini, ngoko kuyimfuneko ukuba inani. ingxowa.Kungene kweli qula.Kwiimeko ezininzi, i-casing isebenza kwimithombo yeendaba ezonakalisayo.Ngoko ke, ngaphezu kokufuna iqondo elithile lamandla adibeneyo, i-casing iyadingeka ukuba ibe nokusebenza kakuhle kokutywinwa kunye nokumelana nokubola.