Processing Technology of Casing Pipe Coupling

    The casing pipe coupling is the necessary workpiece for connecting the two tubing sleeves. Manufacturing methods is the same as seamless pipe, the domestic use of j55, n80Q and other special steel manufacturing. The ends of the steel pipe have internal threads for connection to the upper and lower tubing. In order to ensure the sealing of the joint, the thread precision has more stringent requirements.

    First, use

    Used to connect the upper and lower tubing.

    Second, the type

    Domestic casing pipe is divided into non-thickening casing pipe coupling and thicker oil casing at both ends of the collar.

    Third, the processing process

    Car end face - car outer circle - boring - car thread - inspection - phosphating

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