Tool for washing over, cutting and retrieving a portion of a pip

Details Tool for washing over, cutting and retrieving a portion of a pip Tool for washing over, cutting and retrieving a portion of a pip

1986-05-23

1987-05-05

Leppink, James A.

Wells

Means for perforating, weakening, bending or separating pipe...

Cutter rotates circumferentially of pipe

166 98, 294 8634, E21B 3116, E21B 3118

Patent

active

046624368

ABSTRACT:
There is disclosed a tool for washing over, cutting and retrieving a portion of a pipe or "fish" stuck within a well bore. The tool includes flipper dogs which may move downwardly over a coupling on the pipe, and then raised into gripping engagement with the pipe beneath the coupling, and knives which are forced inwardly into gripping engagement with the pipe in response to an upward strain on the pipe string following engagement of the flipper dogs with the pipe, whereby the pipe may be cut upon rotation of the pipe string.

REFERENCES:
patent: 2277580 (1942-03-01), Carothers
patent: 2304793 (1942-12-01), Bodine, Jr.
patent: 3174548 (1965-03-01), Webb

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