Performance test of L80 oil casing
L80 oil casing flat end, round thread without coupling or with coupling, partial trapezoidal thread with coupling or without coupling, direct connection thread, special end processing, seal ring structure. There are 10 types of L80 petroleum casing pipe steel grades H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P-110, and Q-125. Mainly used for oil well drilling. Introduction to performance inspection of L80 petroleum casing: 1. Physical performance test (1) According to SY / T6194-96. For flattening test (GB246-97) tensile test (GB228-87) and hydraulic pressure test. (2) Hydrostatic test, flattening test, sulfide stress corrosion cracking test, hardness test (as specified in the new ASTME18 or E10 version), tensile test, and transverse impact test (according to the American Petroleum Institute APISPEC5CT first edition of 1988) ASTMA370, ASTME23 and related standards are required to be carried out), grain size measurement (ASTME112 new version or other methods). ...