Oil casing can be divided into different steel grades according to the strength of the steel itself, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc.. Well conditions, well depths are different, the steel grade taken is also different. In the corrosive environment also request the casing itself exists corrosion resistance.
The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The company’s main business is to provide a wide range of products and services to its customers. Therefore, the consumption of casing accounts for more than 70% of all oil well pipe. The casing can be divided into: conduit, surface casing, skill casing and oil layer casing according to the application.