Invention Grant
US08590610B1 Top drive with integral traveling block and airlift thread compensator
有权
顶部驱动器与整体行驶块和空气提升螺纹补偿器
- Patent Title: Top drive with integral traveling block and airlift thread compensator
- Patent Title (中): 顶部驱动器与整体行驶块和空气提升螺纹补偿器
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Application No.: US13780738Application Date: 2013-02-28
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Publication No.: US08590610B1Publication Date: 2013-11-26
- Inventor: Larry G. Keast
- Applicant: Larry G. Keast
- Agency: Buskop Law Group, PC
- Agent Wendy Buskop
- Main IPC: E21B19/00
- IPC: E21B19/00
Abstract:
A top drive assembly arranged to travel in a derrick. An important use of this assembly is to manipulate tubulars in a wellbore, so it includes a traveling block housing and sheaves disposed about a compensating airbag. The airbag is arranged to prevent damage to the threads during screwing and unscrewing operations of tubulars in a wellbore. The arrangement of the airbag requires only a single air valve thus having only a single leak path.
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