Api5ct oil casing manufacturers N80 oil casing supply casing pipe

Oil casing is used to support the oil, gas shaft wall of the pipe to ensure that the drilling process and after the completion of the normal operation of the entire well. Each well according to the different drilling depth and geological conditions, to use several layers of casing. After the casing to take cement cementing, it is with the tubing, the drill pipe is different, can not be reused, are a one-time consumption of materials. Therefore, the consumption of casing accounted for more than 70% of all oil wells. The casing according to the user can be divided into the duct, surface casing, technical casing, and casing.

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