US 12,378,833 B2
Gas driven wireline release tool
Christian Eitschberger, Munich (DE); Thilo Scharf, Letterkenny (IE); and Gernot Uwe Burmeister, Austin, TX (US)
Assigned to DynaEnergetics Europe GmbH, Troisdorf (DE)
Filed by DynaEnergetics Europe GmbH, Troisdorf (DE)
Filed on Jun. 30, 2024, as Appl. No. 18/760,009.
Application 18/760,009 is a continuation of application No. 18/329,334, filed on Jun. 5, 2023, granted, now 12,065,896.
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 2024/0352816 A1, Oct. 24, 2024
Int. Cl. E21B 23/04 (2006.01); E21B 47/12 (2012.01)
CPC E21B 23/0417 (2020.05) [E21B 47/12 (2013.01)] 14 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
a fastener coupling the second connector to the second end of the casing;
wherein in response to the gas generator generating the threshold gas pressure in the chamber, the second connector is configured to slide with respect to the first end of the casing between an initial position, in which the second end of the casing is sealed from an external wellbore environment, and a release position in which the second end of the casing is open to the external wellbore environment; and
the threshold gas pressure is sufficient to deform or break the fastener such that the second connector is forced from the initial position to the release position.