发明名称 |
REMOTELY CONTROLLED FLOW-RESPONSIVE ACTUATING DEVICE, IN PARTICULAR FOR ACTUATING A STABILIZER IN A DRILL STRING |
摘要 |
<p>The device has, inside a duct (11) through which flows an incompressible fluid, a first profiled throttling element (17), a differential piston (10) subjected on one side to the pressure upstream of the profiled element (17) and on the other side to the pressure reduced by the element (17), a profiled surface (18) on the piston on the side subjected to the reduced pressure and a second profiled element (16) which are intended to interact to reduce the passage of fluid as a result of the movement of the piston in a first direction and increase the loss of head substantially, and a spring (15) returning the piston (10) in its second direction of movement. The device can serve particularly for actuating a stabilizer of a set of drill rods. In this case, the differential piston has inclined slopes.</p> |
申请公布号 |
EP0190529(B1) |
申请公布日期 |
1988.03.09 |
申请号 |
EP19850402657 |
申请日期 |
1985.12.31 |
申请人 |
SMF INT |
发明人 |
CENDRE, ANDRE;BOULET, JEAN |
分类号 |
E21B7/06;E21B7/08;E21B17/10;E21B21/10;E21B33/127;E21B34/10;E21B43/112;F16K17/30;(IPC1-7):E21B7/06 |
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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