Power tong torque control

Details Power tong torque control Power tong torque control

1985-10-03

1987-10-20

Kazenske, E. R.

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

173 12, 81470, E21B 500

Patent

active

047007877

ABSTRACT:
Apparatus for controlling the torque delivered to pipe connections by power tongs by utilizing the reaction torque to cause a proportional fluid by-pass to be bled from the drive motor fluid power supply to slow the motor as torque increases, and to stop the motor at some preselected torque quantity. The torque is maintained as long as the operator provides fluid power to the motor circuit to overcome brief torque resistances due to such as pipe wobble.

REFERENCES:
patent: 3745820 (1973-07-01), Weiner
patent: 3980143 (1976-09-01), Swartz et al.
patent: 4091451 (1978-05-01), Weiner et al.
patent: 4199032 (1980-04-01), Weiner et al.
patent: 4305472 (1981-12-01), Brossette

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