发明名称 |
THREADED JOINT HAVING A CONTACTLESS REGION WITH A TAPERED SURFACE PORTION |
摘要 |
A threaded joint for steel pipes comprising a pin 1 having a tapered male thread 11, a tapered sealing surface 13, and an end shoulder surface 14 and a box 2 having correspondingly a tapered female thread 21, a tapered sealing surface 23, and a shoulder surface 24 which is capable of easy tightening and has improved air tightness by the sealing surfaces is arranged such that the pin and the box each have a noncontacting region B where the peripheral surfaces of the pin and the box do not contact each other between the sealing surfaces 13, 23 and the shoulder surfaces 14 and 24. At least a portion of the noncontacting region of the pin adjoining the end of the pin is a tapered surface portion 18 having substantially the same angle of slope as the tapered sealing surface 13, and the noncontacting region of the box is a substantially cylindrical surface.
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申请公布号 |
CA2701417(C) |
申请公布日期 |
2013.07.16 |
申请号 |
CA20082701417 |
申请日期 |
2008.10.03 |
申请人 |
SUMITOMO METAL INDUSTRIES, LTD.;VALLOUREC MANNESMANN OIL & GAS FRANCE |
发明人 |
TAKANO, TAKAHIRO;NAGASAKU, SHIGEO;SUGINO, MASAAKI;HAMAMOTO, TAKAHIRO;YAMAGUCHI, SUGURU |
分类号 |
F16L15/04 |
主分类号 |
F16L15/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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