Downhole tool deployment assembly with improved heater removability and methods of employing such

A downhole tool deployment assembly, said assembly comprising:

• a heater with a tubular heater body having an internal cavity configured to receive a heat source;
• a tubular heat conducting member configured to surround the tubular heater body leaving an annular clearance between said conducting member and said heater body, wherein the tubular heat conducting member does not extend along the entire length of the tubular heater body;
• a collar mounted adjacent to the region of the assembly where the tubular heat conducting member ends, wherein the collar is configured to prevent access to the annular clearance between the tubular heat conducting member and the tubular heater body;
• an eutectic/bismuth based alloy covering extending over the collar and at least a portion of the tubular heater body and the tubular heat conducting member, and whereby only the alloy holds the heater and the tubular heat conducting member together until the alloy is melted;
• and
• whereby once the eutectic/bismuth based alloy has melted and slumped, the heater can be retrieved from the heat conducting member through said clearance.