Wrench assembly for a top drive sub

Details Wrench assembly for a top drive sub Wrench assembly for a top drive sub

1987-03-03

1988-07-26

Meislin, Debra

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5719, 81 572, B25B 1350

Patent

active

047592397

ABSTRACT:
A wrench assembly for making and breaking connections between tubular members, such as a drill string and a top drive sub. The wrench assembly consists of a lower wrench and an upper wrench. The lower wrench has a curved gate arm and a curved latch arm, pivotable between an open position and a closed position. The gate arm has a plurality of teeth on its outer surface, and the latch arm has a plurality of teeth on its inner surface, for locking engagement with the teeth on the gate arm. The lower wrench also has a clamping cylinder and a die block for forcing the tubular member against the gate arm. The upper wrench, mounted above the lower wrench, has a semicircular plate. A plurality of splines are mounted on the interior surface of the semicircular plate for engagement with splines on the top drive sub. A fluid cylinder is provided for applying torque to the wrenches to rotate one of the wrenches with respect to the other wrenches.

REFERENCES:
patent: 2871743 (1959-02-01), Kelley
patent: 3703111 (1972-11-01), Guier
patent: 3832918 (1974-09-01), Lang et al.
patent: 3880024 (1975-04-01), Asada
patent: 4023449 (1977-05-01), Boyadjieff
patent: 4116015 (1978-09-01), Duncan
patent: 4147215 (1979-04-01), Hodge et al.
patent: 4348920 (1982-09-01), Boyadjieff
patent: 4421179 (1983-12-01), Boyadjieff
patent: 4449596 (1984-05-01), Boyadjieff
patent: 4494425 (1985-01-01), Shewmake

Affiliated with

Also associated with

Rating

Wrench assembly for a top drive sub does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wrench assembly for a top drive sub, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wrench assembly for a top drive sub will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-252582