US 12,065,896 B2
Gas driven wireline release tool
Christian Eitschberger, Munich (DE); Thilo Scharf, Donegal (IE); and Gernot Uwe Burmeister, Austin, TX (US)
Assigned to DynaEnergetics Europe GmbH, (DE)
Filed by DynaEnergetics Europe GmbH, Troisdorf (DE)
Filed on Jun. 5, 2023, as Appl. No. 18/329,334.
Application 18/329,334 is a continuation of application No. 18/084,160, filed on Dec. 19, 2022, granted, now 11,753,889.
Claims priority of provisional application 63/388,681, filed on Jul. 13, 2022.
Prior Publication US 2024/0018837 A1, Jan. 18, 2024
Int. Cl. E21B 23/04 (2006.01); E21B 47/12 (2012.01)
CPC E21B 23/0417 (2020.05) [E21B 47/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A wireline release tool for use in a wellbore, comprising:
a casing having a first end, a second end, and a longitudinally extending chamber extending between the first end and the second end;
a first connector disposed at the first end and configured for attachment to a wireline;
a second connector disposed at the second end and configured for attachment to a tool string;
a gas generator disposed in the chamber between the first connector and the second connector, the gas generator being configured to generate a threshold gas pressure in the chamber, the chamber being enclosed within the casing between the first connector and the second connector, wherein in response to the gas generator generating the threshold gas pressure in the chamber, the second connector and the attached tool string are configured to be physically separated from the first connector and the attached wireline; and
an electrical signal feedthrough configured to pass an electrical signal from the surface via the wireline through the wireline release tool, wherein the first connector comprises a first bulkhead extending therethrough, and the second connector comprises a second bulkhead extending therethrough.