According to the first edition of the American Petroleum Institute standard APISPEC5CT1988, there are 10 types of casing steels: H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P-110 and Q-125. Casing shall be supplied with thread and collar, or in any of the following pipe end forms: flat end, round thread without collar or collar, offset trapezoidal thread with or without collar, STC oil casing manufacturer, direct thread, special end processing, sealing ring structure.
Packing according to SY/T6194-96, domestic casing should be tied with steel wire or steel belt. The exposed part of each casing and collar thread shall be screwed with a guard ring to protect the thread. According to the American Petroleum Institute standard APISPEC5CT1988 1st edition, BTC oil casing manufacturer, the casing steel grade is divided into H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P-110, Q-125 in total. Casing shall be SUPPLIED with THREAD and collar, N80 PETROLEUM casing, or in any of the following pipe end forms: FLAT end, ROUND thread without collar or collar, offset trapezoidal thread with or without collar, STRAIGHT thread, SPECIAL end processing, sealing ring construction.
Petroleum special pipe uses and categories Petroleum special pipe is mainly used for oil, gas well drilling and oil, gas transport. It includes oil drill pipe, oil casing, pumping pipe. The oil drill pipe is mainly used to connect the drill collar to the drill bit and transfer drilling power.
Main products: Oil casing standards: API 5CT API oil casing steel grade is usually J55 oil casing, oil casing, K55 oil casing, N80 oil casing, L80 oil casing, P110 oil casing L80-9CRP110-13CR, etc
