Oil casing specification sheet
Oil casing weight calculation formula
[(outside diameter - wall thickness)* wall thickness]*0.02466=kg/ m (weight per m)
Purpose and type of petroleum pipe
The special oil pipe is mainly used for drilling oil and gas Wells and transporting oil and gas.It includes a petroleum drill pipe, a petroleum casing, and a suction pipe.The drill pipe is mainly used to connect the drill collar and drill bit and transfer drilling power.Oil casing is mainly used to support the borehole wall during drilling and after completion to ensure the drilling process and the normal operation of the whole well after completion.Pumping pipe mainly carries oil and gas from the bottom of oil well to the surface.
The oil casing is the lifeline that keeps the well running.Due to the different geological conditions, the downhole stress state is complex, and the comprehensive action of tensile, compressive, bending and torsional stresses on the pipe body, which puts forward higher requirements for the quality of the casing itself.If the casing itself is damaged for some reason, it can reduce production or even kill the entire well.
According to the strength of the steel itself, the casing can be divided into different steel grades, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150 and so on.The steel grade used varies with well condition and depth.The casing itself is also required to have corrosion resistance under corrosive conditions.The casing is also required to have anti - crushing performance in the place of complicated geological conditions.
According to API spec5ct1, 1988, there are 10 grades of casing steel, including 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 ends:Plain end, round thread with or without collar, trapezoidal thread with or without collar, straight thread, special end machining, sealing ring structure.
Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.
No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.
CSPG has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.
We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.