DEVICE FOR Additional fixation of threaded joints of CASING pipes in well with inner slot engagement

摘要

Device for additional fixation of threaded joints of drive string in well with inner slot engagement consists of body with teeth and bushing placed on the body with possibility of rotation and with screw paddles at outer surface where teeth are placed on inner surface of the body and bushing and the device is equipped with spring supported piston with slots for interaction in working condition with teeth of the body and the bushing. Unit for connection of the device and movable bushing is equipped with split joint as circular reboring of outer surface of the body at side of the lower end and additional fixation ring connected to movable bushing with bolt joint, at that movable bushing is equipped with bearing slide element as T-like circular insert placed in respective T-like circular reboring of the bushing.