Power tongs with improved hydraulic drive

Details Power tongs with improved hydraulic drive Power tongs with improved hydraulic drive

B - Operations, Transporting

25

B

255/14.7

B25B 17/00 (2006.01) E21B 19/16 (2006.01)

Patent

CA 1235111

POWER TONGS WITH IMPROVED HYDRAULIC DRIVE ABSTRACT Power tongs are described for making up and breaking apart joints of pipe. The hydraulic system of the tong comprises a tandem fluid motor which enables both forward and reverse operation of the tong in one of several selected speed/torque ranges by operating a pair of control handle. The open throat tong includes a door latching mechanism for automatically locking and unlocking the tong door when activating the tong hydraulic system. The tong dies come into gripping engagement with the pipe over a large composite arcuate angle to increase the pipe gripping ability of the tong.

482330

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