发明名称 |
BENDING OF A SHAFT OF A STEERABLE BOREHOLE DRILLING TOOL |
摘要 |
In certain embodiments, a steerable drilling tool is provided including a rotatable shaft extending through a housing where the shaft and the housing are separated by at least one bearing or two sets of bearings, the shaft having a first portion terminating at a first end of the shaft and a second portion terminating at a second end of the shaft. The steerable drilling tool may further include a drill bit structure operatively coupled to the first portion and a steering subsystem comprising a pair of bearings operatively coupled to the first portion. The steering subsystem may be configured to angulate the shaft by exerting force substantially through the pair of bearings. In certain embodiments, the first portion is between the first end and about one-third of the length of the shaft from the first end towards the second end. |
申请公布号 |
EP2553204(A2) |
申请公布日期 |
2013.02.06 |
申请号 |
EP20110712429 |
申请日期 |
2011.03.24 |
申请人 |
GYRODATA, INCORPORATED |
发明人 |
ALLEN, PETER;KILSHAW, NIGEL JOHN DENNIS;LONG, JONATHAN CHARLES;DAVEY, WALTER EDWARD SOMERVILLE;CARRUTHERS, DONALD IAN |
分类号 |
E21B7/06 |
主分类号 |
E21B7/06 |
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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