发明名称 |
POSITION INDICATING MULTIPLEXED CONTROL SYSTEM FOR DOWNHOLE WELL TOOLS |
摘要 |
Position indication in multiplexed downhole well tools. A method of selectively actuating and indicating a position in a well includes selecting at least one well tool from among multiple well tools for actuation by flowing direct current in one direction through a set of conductors in the well, the well tool being deselected for actuation when direct current flows through the set of conductors an opposite direction; and detecting a varying resistance across the set of conductors as the selected well tool is actuated, the variation in resistance providing an indication of a position of a portion of the selected well tool.
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申请公布号 |
US2011056288(A1) |
申请公布日期 |
2011.03.10 |
申请号 |
US20090921741 |
申请日期 |
2009.09.09 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
SMITHSON MITCHELL C.;BOULDIN BRETT W. |
分类号 |
E21B47/00 |
主分类号 |
E21B47/00 |
代理机构 |
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