Tong assembly

Details Tong assembly Tong assembly

E - Fixed Constructions

21

B

255/14.7

E21B 19/16 (2006.01) B25B 28/00 (2006.01)

Patent

CA 1228848

ABSTRACT A tong assembly for makeup and break out no 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 tonguing 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.

470724

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