A cosa serve l'involucro dell'olio?
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 […]