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SNEAK PATH ELIMINATOR FOR DIODE MULTIPLEXED CONTROL OF DOWNHOLE WELL TOOLS

  • US 20100237698A1
  • Filed: 06/02/2010
  • Published: 09/23/2010
  • Est. Priority Date: 09/09/2008
  • Status: Active Grant
First Claim
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1. A system for selectively actuating from a remote location multiple downhole well tools in a well, the system comprising:

  • at least one control device for each of the well tools, such that a particular one of the well tools can be actuated when a respective control device is selected;

    conductors connected to the control devices, whereby each of the control devices can be selected by applying a predetermined voltage potential across a respective predetermined pair of the conductors; and

    at least one lockout device for each of the control devices, whereby the lockout devices prevent current from flowing through the respective control devices if the voltage potential across the respective predetermined pair of the conductors is less than a predetermined minimum.

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