发明授权
- 专利标题： Position indicating multiplexed control system and method for downhole well tools
- 专利标题（中）： 位置指示复用控制系统和井下井工具的方法
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申请号： US12921741申请日： 2009-09-09
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公开(公告)号： US08636054B2公开(公告)日： 2014-01-28
- 发明人: Mitchell C. Smithson , Brett W. Bouldin
- 申请人： Mitchell C. Smithson , Brett W. Bouldin
- 申请人地址： US TX Houston
- 专利权人： Halliburton Energy Services, Inc.
- 当前专利权人： Halliburton Energy Services, Inc.
- 当前专利权人地址： US TX Houston
- 代理机构： Smith IP Services, P.C.
- 国际申请： PCT/US2009/056339 WO 20090909
- 国际公布： WO2010/030648 WO 20100318
- 主分类号： E21B47/09
- IPC分类号： E21B47/09 ; E21B23/00
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 in 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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