Releasable coupling for tubing conveyed subterranean well perforating gun
Patent
·
OSTI ID:6504982
A method and apparatus for releasing a subterranean well perforating gun from a tubular string after firing of the subterranean well perforating gun. The apparatus comprises two telescopically inter-related tubular assemblies which are interconnected for axial co-movement solely by a plurality of radially shiftable latching elements. Such latching elements are normally maintained in a locked position by an annular piston. One end of the annular piston is exposed to gas at surface ambient pressure and the other end is exposed to the gas pressure generated in the perforating gun by its discharge and subsequently to the well fluid pressures produced by flow of well fluids through the perforations. The movement of the annular piston under such fluid pressure forces permits the locking elements to be cammed radially inwardly and release the connection between the tubular tool string and the perforating gun without any action on the part of the operator.
- Assignee:
- Baker Oil Tools, Inc.
- Patent Number(s):
- US 4526233
- OSTI ID:
- 6504982
- Country of Publication:
- United States
- Language:
- English
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