Handling: hand and hoist-line implements – Grapple – Well type
Patent
1987-10-22
1989-06-13
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Well type
166125, 166217, 294 8619, 294 8625, E21B 2300
Patent
active
048385948
ABSTRACT:
Two embodiments of an improved tool, which may be used as a running tool or a pulling tool for well tools. The improved structures provide running pulling tools which may be jarred upwardly on or jarred downwardly on as long as required after engaging a tool set in well pipe and may be released from the well tool when desired. When the running pulling tools are jarred downwardly, they will operate to release if either the tool mandrels or tool skirts contact with well tool. Each tool skirt is positioned in contact with external dog shoulders, providing increased impact area and eliminating costly precision machining of tool parts. Both improved tools may be manually released from a well tool on surface. One embodiment may be prepared for further use with the aid of hand tools. The other embodiment may be prepared for further use almost by hand.
REFERENCES:
patent: 1580352 (1926-04-01), Ventresca
patent: 3051239 (1962-08-01), Dollison
patent: 3863715 (1975-02-01), Yonker
patent: 4295528 (1981-10-01), Carmody
patent: 4368911 (1983-01-01), Pringle
patent: 4558895 (1985-12-01), Tamplen
Otis Wireline Equipment Brochure, OEC 5121 C, p. 115, "Otis Wireline Pulling Tools".
Cherry Johnny D.
Cox Roland O.
Otis Engineering Corporation
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