What is the oil casing pipe fonction?

　　The oil pipe is mainly used for the drilling of oil and gas wells and the transportation of oil and gas. It includes oil drilling pipe, oil casing and oil extraction pipe. Oil drill pipe is mainly used to connect drill collar and bit and transfer drilling power. Petroleum casing is mainly used to support the well wall in the process of drilling and after completion, so as to ensure the normal operation of the whole oil well in the process of drilling and after completion. The oil and gas at the bottom of the oil well are mainly transported to the surface by the pumping tubing. Oil pipe is the lifeline to maintain the operation of oil well.

　　Due to different geological conditions, the downhole stress state is complex, and the comprehensive action of tensile, compressive, bending and torsional stresses acts on the pipe body, which puts forward higher requirements for the quality of the casing itself. API 5CT K55 Oil Casing Pipe Once the casing itself is damaged for some reason, the production of the whole well may be reduced or even discarded. According to the strength of steel, petroleum pipes can be divided into different steel grades, namely J55, K55, N80, L80, C90, T95, P110, q125, V150, etc. Different well conditions and well depths lead to different steel grades. In corrosive environment, the casing itself is also required to have corrosion resistance. In the complex geological conditions, casing is also required to have collapse resistance.