Tong assembly

Details Tong assembly Tong assembly

1986-01-13

1987-03-10

Schmidt, Frederick K.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5734, B25B 2800

Patent

active

046482920

ABSTRACT:
A tong assembly for makeup and break out of tool joints including a power tong and a backup tong which is rotatable through a limited rotation with respect to the power tong. During a torquing operation a single, self energizing free jaw and die grips the lower tubing of the tool joint in cooperation with two surfaces of a hardsurfaced bushing. The tool joint is gripped eccentric to the longitudinal centerline of the backup tong, and aligned with the longitudinal centerline of the power tong.

REFERENCES:
patent: 4005621 (1977-02-01), Turner et al.
patent: 4200010 (1980-04-01), Hewitt
patent: 4437363 (1984-03-01), Haynes
patent: 4494425 (1985-01-01), Shewmake

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