1986-06-20
1987-12-08
Reger, Duane A.
Brakes
Rod
166212, 166217, 175423, B65H 5910, E21B 2304, E21B 718
Patent
active
047113260
ABSTRACT:
A slip gripping mechanism is shown for supporting a string of cylindrical conduit within the interior bore of a circumscribing conduit. An elongate body has a plurality of spaced longitudinal slots at one end. Vertically shiftable slips are carried in the slots by side edges which engage mating profiles formed in the slots. The slots form guideways for the slips for shifting the slips upwardly and outwardly relative to the body between a set position engaging the circumscribing conduit and an unset position. Each slip has an arcuate lower surface and a selected width to thickness ratio to allow controlled flexing of the slip in the direction of the circumscribing conduit as the slip moves to the set position.
REFERENCES:
patent: 2877850 (1959-03-01), Burns
patent: 2879851 (1959-03-01), Wilson
patent: 3013610 (1961-12-01), Conrad
patent: 3528500 (1970-09-01), Brown
patent: 4311196 (1982-01-01), Beall et al.
patent: 4437517 (1984-03-01), Bianchi et al.
patent: 4440223 (1984-04-01), Akkerman
patent: 4497368 (1985-02-01), Baugh
Baugh John L.
Foster Joe
Gunter Jr. Charles D.
Hughes Tool Company
Oberleitner Robert J.
Reger Duane A.
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