High torsion resistance fully sealed drill pipe threaded joint
A technology of threaded joints and external threaded joints, applied in drill pipe, drill pipe, drilling equipment, etc., can solve the problem that the sealing performance depends on the axial load and axial contact stress, the contact stress of elastic deformation of the sealing mating surface, and cannot be guaranteed. Sealing performance and other issues, to achieve the effects of stable elastic deformation, strong sealing contact stress, and large sealing contact area
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[0027] The double-shouldered drill pipe joints are composed of an externally threaded joint 1 and an internally threaded joint 14 that are threaded and engaged with each other. One end of the externally threaded joint 1 is fixedly connected to one end of a drill pipe, the other end of the externally threaded joint 1 is connected to the internally threaded joint 14 through the connecting thread, and the other end of the internally threaded joint 14 is fixed to another drill pipe. Connection, in order to complete the extension connection of each section of drill pipe.
[0028] Such as figure 1 As shown, the externally threaded joint 1 of the traditional double-shouldered drill pipe joint includes an externally threaded joint body 2 made of forgings. The lumen 3 is used to communicate with the drill pipe hole. One end of the externally threaded joint body 2 is fixedly connected to the drill pipe, and the other end is a threaded connection. The threaded connection end portion o...
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