Downhole release tool with integrated igniter and method of using same

A downhole tool, comprising:

• an uphole portion;
• a downhole portion;
• and
• a release tool, comprising:
• a release housing having a passage therethrough;
• a top sub positioned at an uphole end of the release housing, the top sub connected to the uphole portion of the downhole tool;
• a bottom sub positioned at a downhole end of the release housing, the bottom sub connected to the downhole portion of the downhole tool;
• a release assembly positioned in the passage, the release assembly comprising a release mandrel and a locking mechanism, the release mandrel operatively connected to the top sub and the bottom sub, the locking mechanism releasably securing the release assembly to the bottom sub;
• and
• an integrated igniter positioned in the passage, the integrated igniter comprising an integrator housing, a switch assembly, and an internal propellant, the switch assembly operatively connected to the internal propellant whereby, upon triggering the switch, the internal propellant is ignited to release an ignition fluid under ignition pressure to unlock the locking mechanism and release the downhole portion of the downhole tool from the uphole portion of the downhole tool.

A method of releasing a portion of a downhole tool, comprising:

• providing a release tool comprising a release housing, a release assembly, and an integrated ignitor, the release assembly and the integrated ignitor positioned in the release housing;
• connecting an uphole end of the release tool to an uphole portion of the downhole tool and a downhole end of the release tool to a downhole portion of the downhole tool;
• and
• selectively releasing the downhole portion of the downhole tool by triggering the integrated ignitor to release a fluid under pressure to unlock the release assembly such that the downhole portion of the downhole tool is released from the uphole portion of the downhole tool.