发明名称 |
ELECTRO-MECHANICAL THRUSTER |
摘要 |
A drilling system, including: a drill bit; and a thruster to apply a force to the drill bit. The thruster may include: an inner tubular member disposed within and configured to axially move within an outer tubular member; a thrust piston to transmit a hydraulic force to the inner tubular member, the thrust piston separating an upstream fluid chamber and a downstream fluid chamber between the inner and outer tubular members; at least one pressure switch fluidly connected to the downstream fluid chamber to control flow of a fluid to and from the downstream fluid chamber via at least one fluid inlet and at least one fluid outlet.
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申请公布号 |
CA2630108(C) |
申请公布日期 |
2010.10.12 |
申请号 |
CA20082630108 |
申请日期 |
2008.04.28 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
LEE, ARLEY G. |
分类号 |
E21B11/00;E21B4/00;E21B7/06 |
主分类号 |
E21B11/00 |
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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