发明名称 |
FATIGUE-RESISTANT THREADED COMPONENT FOR A TUBULAR THREADED JOINT |
摘要 |
<p>A fatigue-resistant threaded element for a threaded tubular connection. A portion of threads of the threaded element have a helical groove opening into the threaded crest. A groove is formed in all or a portion of the threads of one or both end zones, namely the first engaged thread zone and the last engaged thread zone, and it is optionally formed in the threads of the medial thread zone. The groove reduces stiffness of threads carrying a groove in the end zone or zones compared with the stiffness of the threads in the medial thread zone. The threaded tubular connection obtained after making up the threaded element with a mating threaded element is much more resistant to cyclic tensile stress and/or axial compressive stresses and/or flexion stresses.</p> |
申请公布号 |
EP1373775(B1) |
申请公布日期 |
2004.10.06 |
申请号 |
EP20020713006 |
申请日期 |
2002.03.04 |
申请人 |
VALLOUREC MANNESMANN OIL & GAS FRANCE;SUMITOMO METAL INDUSTRIES, LTD. |
发明人 |
NOEL, THIERRY;ROUSSIE, GABRIEL |
分类号 |
F16L15/00;F16B33/02;F16L15/06;(IPC1-7):F16L15/06 |
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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