发明名称 |
ТРУБНОЕ РЕЗЬБОВОЕ СОЕДИНЕНИЕ С ТРАПЕЦИЕВИДНОЙ РЕЗЬБОЙ С ВЫПУКЛОЙ ПОВЕРХНОСТЬЮ ВИТКА |
摘要 |
A threaded tubular connection includes two elements, male and female, made up one into the other to a given torque in which, prior to making up, at least one thread face under contact pressure has a convexly rounded shape that is continuous over its width with a radius of curvature in the range 2 to 60 mm and is in point contact with the corresponding face of the mating element. Such a threaded connection has an increased resistance to breakout or to overtorquing. In one embodiment, the convexly rounded face is a male or female thread flank and one of the male or female threads includes a groove opening into the thread crest to render flexible either the convexly rounded flank or the corresponding flank. Such a geometry can accommodate variations in contact between the flanks. |
申请公布号 |
RU2003127121(A) |
申请公布日期 |
2005.03.10 |
申请号 |
RU20030127121 |
申请日期 |
2002.02.04 |
申请人 |
ВАЛЛУРЕК МАННЕСМАНН ОЙЛ ЭНД ГЭС ФРАНС (FR);СУМИТОМО МЕТАЛ ИНДАСТРИЗ, ЛТД. (JP) |
发明人 |
НОЭЛЬ Тьерри (FR);РУССИ Габриэль (FR);ВАРЕНН Эмманюэль (FR) |
分类号 |
F16L15/02;F16B7/18;F16L15/00;F16L15/06 |
主分类号 |
F16L15/02 |
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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