The use of oil casing

　　Oil casing is a large diameter pipe, play a fixed oil and natural gas wells or wells role. The casing is inserted into the wellbore and fixed with cement to prevent the wellbore from separating the formation and the borehole from collapsing and ensuring that the drilling mud circulates in order to facilitate drilling. Oil casing steel grade: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150 and so on. Casing end processing forms: short round thread, long round thread, partial trapezoidal thread, special buckle and so on. For Large Diameter API 5CT Oil Casing Pipe is mainly used in the drilling process and after completion of the support of the borehole wall to ensure that the drilling process and after the completion of the normal operation of the entire well. Important position of oil pipe The oil industry is a large number of oil pipe industry, oil pipe in the oil industry occupies a very important position