Oil casing is a kind of large caliber pipe, which plays a role in fixing oil and gas well wall or hole.
The casing is inserted into the hole and is fixed with cement to prevent the borehole from separating the strata from the borehole and to ensure that the drilling mud circulates and flows in order to facilitate drilling and mining. Steel grade of oil casing: H40, J55,k55, N80, L80, C90,t95, P110, Q125, V150, etc. Casing End Processing type: Short round thread, oblong thread, eccentric trapezoidal thread, special buckle and so on. Oil well drilling is mainly used in the drilling process and after completion of the wall support to ensure that the drilling process and completion of the entire well after the normal operation.
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