发明公开
- 专利标题: THREADED JOINT FOR OIL WELL PIPE
- 专利标题(中): 螺纹接头用于石油钻探管
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申请号: EP14811561申请日: 2014-06-09
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公开(公告)号: EP2977662A4公开(公告)日: 2016-05-25
- 发明人: KAWAI TAKAMASA , TAKAHASHI KAZUNARI , CHIKATSUNE HIROSHI , YOSHIKAWA MASAKI , TAKANO JUN , NAGAHAMA TAKUYA , UETA MASATERU
- 申请人: JFE STEEL CORP
- 专利权人: JFE STEEL CORP
- 当前专利权人: JFE STEEL CORP
- 优先权: JP2013125327 2013-06-14
- 主分类号: F16L15/04
- IPC分类号: F16L15/04 ; E21B17/04 ; F16B33/02
摘要:
The prior art has a drawback that it is difficult to provide a threaded joint for an oil country tubular goods having excellent galling resistance at a threaded portion on a pin pipe end side as industrial products. Provided is a threaded joint for an oil country tubular goods having excellent galling resistance, which is a premium joint, a ratio L/p of a chamfer length of pin thread L to a thread pitch p being set to 1.0 or more to 3.0 or less.
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