Handling: hand and hoist-line implements – Grapple – Well type
Patent
1986-10-06
1988-08-30
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Well type
166125, 166217, 294 8619, 294 8625, E21B 2300
Patent
active
047671459
ABSTRACT:
An improved running pulling tool utilizing dogs for engaging an internal fishing neck on a well tool. The dogs are locked in fishing neck engaging position on the tool mandrel and are unlocked by jarring downwardly, upwardly and again downwardly and moved to a position on the mandrel retracting the dogs and releasing the improved tool from the fishing neck. The improved structure provides a tool which may be jarred upwardly on or jarred downwardly on as long as required and which may be released from the well tool fishing neck when desired. When the tool is jarred downwardly on, it will operate to release if either the tool skirt or mandrel contact the well tool. The skirt may be positioned to contact shoulders on the dogs and eliminate costly precision machining and provide more area to absorb jarring impact on the tool. On surface the improved tool can be manually released from a fishing neck and manually prepared for further use.
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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