Multi-plane sealing tooth-width-changing wedge type coupling structure and oil well pipe structure
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[0031] The present invention will be further described below in conjunction with specific examples.
[0032] A multi-seal variable tooth width wedge-shaped coupling structure, including a coupling body 1, the inner walls of both ends of the coupling body 1 are coupling internal thread sections 1.1, and a coupling is provided between the two coupling internal thread sections 1.1 Shoulder 1.2; in the direction from both ends of the coupling body 1 to the middle, the tooth width of the coupling internal thread section 1.1 is set to gradually increase, and the tooth width of the coupling internal thread section 1.1 is gradually decreasing Setting, the difference between two adjacent tooth widths is equal to the difference between the adjacent two alveolar widths, the height of each tooth of the coupling internal thread section 1.1 is equal, and the taper of the coupling internal thread section 1.1 is 1:16~1 : 24; on the longitudinal section of the coupling body 1, each tooth on th...
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