Oil bushing threaded joint
A threaded joint, oil casing technology, applied in the field of oil casing threaded joints, can solve the problems of difficult detection and processing of protruding threads, poor air sealing performance, stress concentration, etc., so as to improve uneven contact stress distribution and air tightness. The effect of good performance and improved torsion resistance
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[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0036] See Figure 1-Figure 9 , The present invention relates to an oil casing threaded joint. The actual product model of the present invention is PT-G3N. It includes a coupling 1 and a pipe 5. The coupling 1 is provided with an inner taper thread 2 and an inner seal with a groove The conical surface 3 and the reverse stop shoulder 4; the end of the tube 5 is necked to form a necking, and the tube 5 is provided with an external tapered thread 6...
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