Power tong with sliding jaw

Details Power tong with sliding jaw Power tong with sliding jaw

E - Fixed Constructions

21

B

E21B 19/16 (2006.01)

Patent

CA 2481736

A power tong (1) or back-up tong has a sliding jaw assembly (6) that may be advanced into the throat (4) of the tong for engagement with a pipe. A camming surface (11) on the inside circumference of the ring gear (10) advances the sliding jaw assembly into full engagement with the well pipe when the ring gear (10) is rotated with respect to the jaw assembly.

L'invention concerne une clé de vissage (1) ou une clé de dévissage automatique, présentant un assemblage de mâchoires coulissantes (6), pouvant être avancé dans le creux (4) de la clé pour s'engager dans un conduit. Une surface de déverrouillage (11) située sur la circonférence intérieure d'une couronne (10) fait avancer l'assemblage de mâchoires coulissantes jusqu'à un engagement total dans le conduit de puits, lorsque la couronne (10) est mise en rotation par rapport à l'assemblage de mâchoires.

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