Back-up tong body

Details Back-up tong body Back-up tong body

1998-04-20

1999-12-21

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5716, B25B 1350

Patent

active

060034122

ABSTRACT:
A back-up tong is provided for use with a power tong to make up and break out longitudinally adjoining pipe sections. A torque arm engages the back-up tong and power tong to transfer torque therebetween, and a load cell is provided to measure the torque. The rear of the back-up tong has a fin element is rotatably mounted thereto. The fin element and torque arm are driven together upon initiating make up or break out operations to trap the load cell therebetween. The rotatable fin element substantially maintains alignment with the load cell and torque arm during make up for more reliable torque measurements. The fin element may alternately be mounted to the power tong.

REFERENCES:
patent: Re31699 (1984-10-01), Eckel
patent: 3799010 (1974-03-01), Guier
patent: 4005621 (1977-02-01), Turner, Jr. et al.
patent: 4402239 (1983-09-01), Mooney
patent: 5062326 (1991-11-01), Goldschmidt
patent: 5546833 (1996-08-01), Holdeman et al.
patent: 5664310 (1997-09-01), Penisson

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