Casing pipe is a steel pipe used to support the wellbore of oil and gas wells, ensuring the normal operation of the entire well during drilling and after completion. After the casing pipe is inserted into the well, cement cementing should be used. Unlike oil pipes and drill rods, it cannot be reused and is a disposable consumable material.
Casing pipe can be divided into conduit pipe, surface casing pipe, technical casing pipe, and reservoir casing pipe according to their usage. According to the strength of the steel itself, the casing can be divided into different steel grades, such as J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. The steel grade used varies depending on the well condition and depth. In corrosive environments, it is also required that the casing itself has anti-corrosion performance, and in areas with complex geological conditions, it is also required that the casing has anti extrusion performance.
Production process of casing pipe
