发明名称 |
Methods and apparatus for mitigating downhole torsional vibration |
摘要 |
A well tool apparatus for damping torsional vibration of a drill string comprises stabilizing members projecting radially outwards from a housing that is, in operation, rotationally integrated in the drill string, to stabilize the drill string by engagement with a borehole wall. The stabilizing members are displaceably mounted on the housing to permit limited angular movement thereof relative to the housing about its rotational axis. The well tool apparatus includes a hydraulic damping mechanism to damp angular displacement of the stabilizing members relative to the housing, thereby damping torsional vibration of the housing and the connected drill string, in use. |
申请公布号 |
AU2013393872(A1) |
申请公布日期 |
2015.11.26 |
申请号 |
AU20130393872 |
申请日期 |
2013.07.09 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
GAJJI, BHARGAV;GAIKWAD, RAHUL RAMCHANDRA;AGARWAL, PUNEET |
分类号 |
E21B17/10 |
主分类号 |
E21B17/10 |
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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