1982-04-15
1984-05-29
Mancene, Gene
Brakes
Rod
175422, 294102A, E44B 2100, E21B 304
Patent
active
044506066
ABSTRACT:
A slip elevator apparatus for elevating hand-type slips and slip assemblies provides a frame and has means accompanying the frame for removably affixing the frame to a drilling rig rotary table allowing the frame to rotate therewith, with the frame occupying during operation a peripheral position on a rotary table, leaving an open center. Linkage forms a connection between the frame and a set of hand slips to be lifted. The linkage is movably disposed with respect to the frame between upper and lower positions. Biasing preferably in the form of a plurality of coil springs is provided for biasing the linkage to the upper position thus elevating connected slips. In order to overcome the biasing, footpegs are provided for applying the weight of a human operator, roughneck, or the like so as to overcome the bias and move the linkage and connected slips into the lowermost position where they are used to grip the drill pipe.
REFERENCES:
patent: 136812 (1873-03-01), Bullock
patent: 1375964 (1921-04-01), Hiniker
patent: 1499635 (1924-07-01), Benckenstein
patent: 1664461 (1928-04-01), Montgomery
patent: 1676275 (1928-07-01), Montgomery
patent: 1966454 (1934-07-01), Moody
patent: 2245592 (1941-06-01), Jones
patent: 3122811 (1964-03-01), Gilreath
patent: 4253219 (1981-03-01), Krasnov
Mancene Gene
Weiss John G.
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