Handling: hand and hoist-line implements – Grapple – Well type
Patent
1984-02-17
1986-04-08
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Well type
294 8612, 294 8624, E21B 3120
Patent
active
045808260
ABSTRACT:
A retrieval tool to retrieve loose pipe and the like from a well. A bell-mouth centering device is sent down the hole to center the pipe, and a spear passes through the centering device into the pipe. Gripping devices carried by the spear engage the pipe so as to pull it to the surface. The gripping devices are able to cut a thread in the pipe so as to be releasable from the pipe if desired.
REFERENCES:
patent: 672154 (1901-04-01), Taylor
patent: 1087262 (1914-02-01), Schildwachter
patent: 1163561 (1915-12-01), Schildwachter
patent: 1363226 (1920-12-01), Bonawitt
patent: 1589896 (1926-06-01), Rape
patent: 1839493 (1932-01-01), Nutter
patent: 2647008 (1953-07-01), Stewart et al.
patent: 2886369 (1959-05-01), Decuir
Carver Herman C.
Chalmers Bernie L.
Kent Michael R.
Cherry Johnny D.
Mon Donald D.
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