发明名称 |
Drill bit direct drive for deep well drilling tools |
摘要 |
A direct drive for well drilling tools is established which includes a friction bearing with a trace ring and a bearing ring. The bearing ring has a number of bearing segments distributed around its periphery. These bearing segments are supported so that they can be tilted and shifted axially. Each bearing segment includes a support part mounted in a bore of the bearing ring and a compression spring rod arranged in the bore of the bearing ring to provide tilting and axial shifting of the segment against a spring force.
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申请公布号 |
US4854401(A) |
申请公布日期 |
1989.08.08 |
申请号 |
US19880172590 |
申请日期 |
1988.03.24 |
申请人 |
EASTMAN CHRISTENSEN COMPANY |
发明人 |
KRUGER, VOLKER;DAENICKE, HEINRICH |
分类号 |
E21B4/00;E21B4/02;F16C17/06 |
主分类号 |
E21B4/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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