发明名称 |
Method and apparatus for making a joint for steel tubes |
摘要 |
The present invention concerns a new threaded joint for steel tubes, usable in particular in the petroleum industry, which contains a female element equipped with conical threads having an internal screw stop mating and a male element correspondingly threaded with a screw stop having a form corresponding to the female element. The male element stop and the female element stop are each manufactured by cold working using a tool capable of engaging in or on the threads of the corresponding element.
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申请公布号 |
US4641410(A) |
申请公布日期 |
1987.02.10 |
申请号 |
US19850714970 |
申请日期 |
1985.03.22 |
申请人 |
VALLOUREC |
发明人 |
PLAQUIN, BERNARD A.;FRADIN, LOUIS |
分类号 |
F16L15/00;E21B17/042;F16L15/08;(IPC1-7):B23Q17/00;G01B3/40;G01B3/48 |
主分类号 |
F16L15/00 |
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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