Tong for well pipe

Details Tong for well pipe Tong for well pipe

E - Fixed Constructions

21

B

E21B 19/06 (2006.01) B25B 13/50 (2006.01) B25B 17/00 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2256298

A back-up tong is provides with one or more linearly-acting hydraulic cylinders which advance a triangular wedge in order to drive a pipe gripping jaw inwardly into engagement with pipe. A fixed jaw that is not hydraulically actuated can be adjusted in its fixed position. Springs within the actuated jaw biases it to recoil spontaneously from the pipe upon the retraction of the wedge.

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