发明名称 |
Downhole motor assembly and method for torque regulation |
摘要 |
A downhole motor assembly for driving a drill bit. The assembly includes a hydraulic drive section with a stator and a rotor located inside the stator to form a flow path between the stator and the rotor. Fluid flowing through the flow path in response to a pressure differential across the hydraulic drive section creates an operative force to rotate the drill bit. The assembly also includes a regulation mechanism that includes a valve and a fluid flow diversion bore for diverting at least some fluid from the flow path when the pressure differential across the hydraulic drive section is greater than or equal to a transition pressure differential.
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申请公布号 |
US7757781(B2) |
申请公布日期 |
2010.07.20 |
申请号 |
US20070871801 |
申请日期 |
2007.10.12 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
HAY RICHARD T.;GAWSKI VICTOR |
分类号 |
E21B44/00 |
主分类号 |
E21B44/00 |
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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