Supercharged power tongs

Details Supercharged power tongs Supercharged power tongs

1986-04-09

1988-03-01

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5719, 91519, 91167R, B25B 1350

Patent

active

047277815

ABSTRACT:
A supercharged power tongs for making up or breaking apart drill tools used in oil or geologic drilling engineering is designed to take the place of B-type tongs. Supercharger and assist fluid cylinders are adopted in the gripping and torqueing devices respectively which are completely new provisions. An automatic make-up torque limitator is built in the control system. A pull-in locating device is used for moving the power tongs. This invention is particularly adequate for make-up and break apart operations on drill pipes, drill collars, kellys and lifting subs when the sizes of these drill tools vary from time to time, with no necessity for replacements of any components.

REFERENCES:
patent: 2055815 (1936-09-01), Dewey
patent: 3500708 (1970-03-01), Wilson
TW-60 Torque Wrench Service Manual; Varco International, Inc., Dec. 1978.

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