发明名称 |
SKRUKOBLING FOR OLJEROER. |
摘要 |
A basic structure of a screw joint coupling for oil pipes according to the invention is that a main sealing portion is constructed with a sealing portion formed axially in convex at an end of a male screw, and with a sealing portion formed in taper at an inner side of a female screw, and that the male screw and the female screw are butted at an end point of the former and an end part of a stopper formed at an inner side of the latter. The main sealing portion has a shrinkage allowance DELTA D of the seal part, which is regulated in size in a relation between a shrinkage allowance DELTA d of the screw and a pressure P of the sealing part. In addition, specific values are selected as to the load flank angle, the radius of curvature in convex of the sealing portion of the male screw, and the tapering angle of the sealing portion of the female screw. |
申请公布号 |
NO167526(C) |
申请公布日期 |
1991.11.13 |
申请号 |
NO19840003590 |
申请日期 |
1984.09.11 |
申请人 |
NIPPON KOKAN KABUSHIKI KAISHA |
发明人 |
HANDA, MASAO;UEKI, MIKIO;TOKUYA, TOMIHIKO;HORI, MITSUAKI;YASUOKA, HIDENORI;SATO, TOSHIO;ICHIHARA, TAKUZO;TOYAMA, KENICHI |
分类号 |
E21B17/042;F16L15/00;F16L15/04 |
主分类号 |
E21B17/042 |
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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