Wells – Processes – Disassembling well part
Patent
1984-01-20
1985-07-02
Novosad, Stephen J.
Wells
Processes
Disassembling well part
166 55, 166297, 166383, 175 2, 175 456, E21B 2304, E21B 43116
Patent
active
045262330
ABSTRACT:
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.
REFERENCES:
patent: 3455578 (1969-07-01), Hanes
patent: 3706344 (1972-12-01), Vann
patent: 3842914 (1974-10-01), Mott
patent: 3997006 (1976-12-01), Wetzel
patent: 4040482 (1977-08-01), Vann
patent: 4113016 (1978-09-01), Trott
patent: 4299287 (1981-11-01), Vann et al.
Baker Oil Tools, Inc.
Kisliuk Bruce M.
Novosad Stephen J.
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