API SPEC 5CT-2018 casing na tubing
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Nkọwapụta maka casing na tubing API Nkọwapụta 5CT EDITION nke itoolu-2012
A na-ejikarị ihe mkpuchi mmanụ Api5ct ebufe mmanụ, gas, gas, mmiri na mmiri mmiri na gas ndị ọzọ, enwere ike kewaa ya na ọkpọkọ igwe anaghị agba nchara na ọkpọkọ welded. Ọkpụkpọ ígwè welded na-ezo aka na ọkpọkọ nchara ogologo welded
