发明名称 |
TOP DRIVE SYSTEMS FOR WELLBORE AND DRILLING OPERATIONS |
摘要 |
A system includes a gear system having a gear housing and a lower planetary carrier disposed in the gear housing, the lower planetary carrier being adapted to rotate relative to the gear housing. A top drive system is operatively coupled to the gear system, the top drive system having a top drive shaft that is adapted to be driven by the gear system. A single bearing that is adapted to facilitate rotation of the lower planetary carrier is positioned between the gear housing and the lower planetary carrier. A motor apparatus is operatively coupled to and adapted to drive the gear system by rotating the lower planetary carrier relative to the gear housing, wherein a rotational axis of the single bearing is adapted to move in a lateral translational direction with respect to the gear housing while the motor apparatus is rotating the lower planetary carrier. |
申请公布号 |
US2014274549(A1) |
申请公布日期 |
2014.09.18 |
申请号 |
US201414288923 |
申请日期 |
2014.05.28 |
申请人 |
National Oilwell Varco L.P. |
发明人 |
De Jong Bastiaan;Braman, JR. Arthur William |
分类号 |
E21B3/02;F16H1/28 |
主分类号 |
E21B3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Houston TX US |