Methods and apparatus for make up and break out of tubular...

Details Methods and apparatus for make up and break out of tubular... Methods and apparatus for make up and break out of tubular...

2011-07-12

2011-07-12

Meislin, D. S (Department: 3727)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057200

Reexamination Certificate

active

07975572

ABSTRACT:
A gripping apparatus and a method apparatus for making up and breaking out tubular connections. In one embodiment, the gripping apparatus comprises an outer gear, a plurality of rollers coupled to the outer gear, an inner ring, a passive jaw, and a pair of active jaws pivotably coupled to the inner ring. The active jaws include camming surfaces for positioning, securing, actuating, and retracting the active jaws upon rotation of the outer gear. The gripping apparatus may further include a control switch operable to maintain the gripping apparatus in a make up mode or a break out mode regardless of rotation of the outer gear.

REFERENCES:
patent: 3261241 (1966-07-01), Catland
patent: 3371562 (1968-03-01), Kelley
patent: 4084453 (1978-04-01), Eckel
patent: 4246809 (1981-01-01), Keast et al.
patent: 4290304 (1981-09-01), Eckel
patent: 4437363 (1984-03-01), Haynes
patent: 5291808 (1994-03-01), Buck
patent: 5819604 (1998-10-01), Buck

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