发明名称 |
Hydraulic Lockout Device for Pressure Controlled Well Tools |
摘要 |
Well tools are provided which although pressure responsive, may be maintained by a hydraulic lockout in a nonresponsive condition until a threshold actuation step is performed. This lockout may be achieved by a hydraulic mechanism which controls the rate at which pressure is transmitted to a fluid spring during periods of increased pressure at the pressure source. When the tool is desired to be responsive to pressure cycles, a valve may be opened by established a differential between the pressure in the fluid spring and the pressure source. Communication of pressure in the fluid spring to a movable mandrel will then allow operation of the well tool in response to pressure cycles at the pressure source in accordance with the established design of the well tool.
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申请公布号 |
US2010200245(A1) |
申请公布日期 |
2010.08.12 |
申请号 |
US20090367682 |
申请日期 |
2009.02.09 |
申请人 |
HALLIBURTON ENERGY SERVICES INC. |
发明人 |
RINGGENBERG PAUL D.;NIVENS HAROLD W. |
分类号 |
E21B34/10;E21B23/00;E21B34/06 |
主分类号 |
E21B34/10 |
代理机构 |
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