发明名称 |
SPRING-OPERATED ANTI-STALL TOOL |
摘要 |
An anti-stall tool in an oil well drilling assembly that controls reciprocation of the drill bit by controller that alters weight-on-bit (WOB) depending upon measured downhole pressure or torque. The downhole controller keeps the drill bit rotating by maintaining WOB during normal drilling operations, increasing WOB if sensed working pressure indicates that drill bit loading or torque is undesirably low, and reversing WOB by applying a spring force for retracting the drill bit if excessive working pressure or torque is sensed.
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申请公布号 |
US2009173539(A1) |
申请公布日期 |
2009.07.09 |
申请号 |
US20090348770 |
申请日期 |
2009.01.05 |
申请人 |
MOCK PHILIP WAYNE;KRUEGER IV RUDOLPH ERNST |
发明人 |
MOCK PHILIP WAYNE;KRUEGER, IV RUDOLPH ERNST |
分类号 |
E21B44/06;E21B7/00;E21B44/00 |
主分类号 |
E21B44/06 |
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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