Sneak path eliminator for diode multiplexed control of downhole well tools

A system for selectively actuating from a remote location multiple downhole bidirectional load devices in a well, the system comprising:

• a direct current power supply;
• a plurality of bidirectional load devices positioned in a well;
• a plurality of conductors connected to the power supply and the bidirectional load devices, whereby each of the bidirectional load devices can be actuated by applying a voltage potential across a respective predetermined pair of the conductors, and whereby each of the bidirectional load devices can be run forward or backward depending on the direction of current through the pair of conductors;
• and
• at least one lockout device connected to each bidirectional load device, whereby the lockout device prevents current from flowing through its respective bidirectional load device until the voltage potential across the lockout device exceeds a predetermined minimum.