Oilfield tubular torque wrench

Details Oilfield tubular torque wrench Oilfield tubular torque wrench

2009-02-24

2011-10-25

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057340

Reexamination Certificate

active

08042432

ABSTRACT:
An oilfield tubular torque wrench and a tong therefore is described. In one aspect, a torque wrench is described including an upper tong including a recess for accepting an oilfield tubular positioned along an axis passing through the recess; a lower tong including a recess positioned below the recess of the upper tong so that the axis passes therethrough; pipe gripping dies in the recesses of the upper tong and the lower tong drivable toward and away from the axis; a swivel bearing between the upper tong and the lower tong permitting the upper tong and the lower tong to swivel relative thereto while the recesses remain positioned with the axis passing therethrough, the swivel bearing including a first partial ring mounted to one of the upper tong and the lower tong and a second partial ring mounted on the other of the upper tong and lower tong, the second partial ring being interengaged at a bearing surface to ride along a length of a bearing surface of the first partial ring; and a retainer ring positioned adjacent one of the first partial ring and the second partial ring to act against lateral disengagement of the second partial ring from the first partial ring. In another aspect, dissimilar materials are selected for the first ring and the second ring to avoid galling. In another aspect a tong with adjustable dies is described.

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