Heat activated safety fuse

Wells – Processes – Destroying or dissolving well part

Patent

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Details

166 63, 166 651, 175 454, 102222, E21B 2304

Patent

active

053928601

ABSTRACT:
A method and an apparatus for use in a wellbore are provided to prevent an electrical current from passing between a power supply and an electrically operated downhole well tool until after the electrically operated downhole well tool is positioned downhole within the wellbore. A temperature sensitive member prevents a biased member from moving from a first position to a second position until after the temperature sensitive member has been heated to an activation temperature, at which the temperature sensitive member softens to allow the biased member to move through the temperature sensitive member and to the second position for electrically connecting between the power supply and the electrically operated downhole well tool.

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