发明名称 |
DRILLING ASSEMBLY WITH A STEERING DEVICE FOR COILED-TUBING OPERATIONS |
摘要 |
The present invention provides a coiled tubing conveyed drilling assembly for drilling deviated wellbores. The drilling assembly includes a drill bit at the lower end of the drilling assembly. A drilling motor provid es the rotary power to the drill bit. A bearing assembly of the drilling motor provides lateral and axial support to the drill shaft connected to the drill bit. A steering device is integrated into drilling motor assembly. The steering device contains a plurality of force application members disposed at an outer surface of the drilling motor assembly. Each force application member is adapted to move between a normal position and a radially extended position to exert force on the wellbore interior when in extended position. A power unit in the housing provides pressurized fluid to the force application members. A control device for independently operating each of the force application members is disposed in the drilling motor assembly. A control circuit or unit independently controls the operation of the control device t o independently control each force application member. For short radius drilling, a knuckle joint is disposed uphole of the steering device to provi de a bend in the drilling assembly. During drilling of a wellbore, the force application members are operatedto adjust the force on the wellbore to drill the wellbore in the desired direction.
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申请公布号 |
CA2279338(C) |
申请公布日期 |
2007.08.07 |
申请号 |
CA19982279338 |
申请日期 |
1998.01.29 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
KRUEGER, VOLKER;KRUSPE, THOMAS;FABER, HANS JURGEN;FREYER, CARSTEN |
分类号 |
E21B7/06;E21B7/08;E21B17/10 |
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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