发明授权
- 专利标题: Apparatus and methods for limiting movement of gripping members
- 专利标题(中): 用于限制夹持构件运动的装置和方法
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申请号: US13578463申请日: 2011-09-22
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公开(公告)号: US09194192B2公开(公告)日: 2015-11-24
- 发明人: Donald E. Mosing , Jeremy Richard Angelle , John Erick Stelly
- 申请人: Donald E. Mosing , Jeremy Richard Angelle , John Erick Stelly
- 申请人地址: US TX Houston
- 专利权人: Frank's International, LLC
- 当前专利权人: Frank's International, LLC
- 当前专利权人地址: US TX Houston
- 代理机构: Osha Liang LLP
- 国际申请: PCT/US2011/052768 WO 20110922
- 国际公布: WO2012/040469 WO 20120329
- 主分类号: E21B19/07
- IPC分类号: E21B19/07 ; E21B19/10
摘要:
Apparatus and method for limiting movement of gripping members of an elevator are provided. The apparatus includes a locking arm coupled to one or more of the gripping members and configured to move in a first direction when the gripping members move toward engagement with a tubular and to move in a second direction when the gripping members move away from engagement with the tubular. The apparatus also includes a first engagement member configured to move between a disengaged position, in which the first engagement member and the locking arm are relatively moveable, and an engaged position, in which the first engagement member allows the locking arm to move in the first direction but restrains the locking bar from moving in the second direction by more than a selected distance.
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