Invention Grant
US08127836B1 Top drive with an airlift thread compensator and a hollow cylinder rod providing minimum flexing of conduit
有权
顶部驱动器带有空气提升螺纹补偿器和空心圆柱杆，提供导管的最小弯曲
- Patent Title: Top drive with an airlift thread compensator and a hollow cylinder rod providing minimum flexing of conduit
- Patent Title (中): 顶部驱动器带有空气提升螺纹补偿器和空心圆柱杆，提供导管的最小弯曲
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Application No.: US13176335Application Date: 2011-07-05
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Publication No.: US08127836B1Publication Date: 2012-03-06
- Inventor: Larry G. Keast , James Strickland , Alan Shem
- Applicant: Larry G. Keast , James Strickland , Alan Shem
- Applicant Address: US TX Houston
- Assignee: Larry G. Keast
- Current Assignee: Larry G. Keast
- Current Assignee Address: US TX Houston
- Agency: Buskop Law Group, PC
- Agent Wendy Buskop
- Main IPC: E21B19/22
- IPC: E21B19/22
Abstract:
A top drive for engagement with a travelling block with a hook can include an airlift thread compensator connected to a bail. An enclosure can be connected to the bail with an airbag disposed therein. A bail pin can be engaged through the enclosure, and can be connected to the airbag. The airbag can support weight of the top drive. Upper links can be connected to the enclosure and to a top drive housing. The top drive housing can support a stem connected to a motor, and a bearing can be disposed about the stem. Lower links can be connected to the top drive housing and to an elevator for moving tubulars. An inside blow out preventer can be connected to the stem and to a saver sub. A torque wrench assembly can be connected to the top drive housing for gripping tubulars.
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