发明授权
- 专利标题： Fast make-up fatigue resistant rotary shouldered connection
- 专利标题（中）： 快速化妆抗疲劳旋转肩带连接
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申请号： US11164079申请日： 2005-11-09
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公开(公告)号： US07455329B2公开(公告)日： 2008-11-25
- 发明人: Andrei Muradov , Raymond Brett Chandler , James W. Breihan
- 申请人： Andrei Muradov , Raymond Brett Chandler , James W. Breihan
- 申请人地址： US TX Houston
- 专利权人： Grant Prideco, L.P.
- 当前专利权人： Grant Prideco, L.P.
- 当前专利权人地址： US TX Houston
- 代理商 Jeffery E. Daly
- 主分类号： F16L15/00
- IPC分类号： F16L15/00 ; F16L15/06
摘要：
A thread form having improved strength and fatigue resistance. The root of the thread may be cut on multiple cutting radii having displaced centers. At least two of the root surfaces formed by cutting radii may have lengths that are greater than the root truncation. The threads may be used in a double start configuration to increase the connection strength and reduce makeup and breakout rotations.
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