US 12,467,328 B2
Downhole release tool with integrated igniter and method of using same
Cameron Michael Bryant, Sugar Land, TX (US); James William Anthony, Missouri City, TX (US); and Jordan Joseph Faltemeier, Houston, TX (US)
Assigned to GR Energy Services Management, LP, Sugar Land, TX (US)
Appl. No. 18/566,576
Filed by GR Energy Services Management, LP, Sugar Land, TX (US)
PCT Filed Jun. 1, 2022, PCT No. PCT/US2022/031841
§ 371(c)(1), (2) Date Dec. 1, 2023,
PCT Pub. No. WO2022/256454, PCT Pub. Date Dec. 8, 2022.
Claims priority of provisional application 63/195,551, filed on Jun. 1, 2021.
Prior Publication US 2024/0254848 A1, Aug. 1, 2024
Int. Cl. E21B 23/06 (2006.01); E21B 23/04 (2006.01)
CPC E21B 23/065 (2013.01) [E21B 23/04 (2013.01); E21B 23/0414 (2020.05)] 21 Claims
OG exemplary drawing
 
1. A release tool for releasing a downhole portion a of downhole 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 an 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;
wherein the locking mechanism comprises a locking sleeve and locking balls movable by the integrated ignitor between a locked position and an unlocked position; and
wherein the release mandrel has ball receptacles radially disposed about a downhole end of the release mandrel and wherein the bottom sub has ball seats shaped to receive the locking balls.