Method and device for positioning a power tong at a pipe joint

Details Method and device for positioning a power tong at a pipe joint Method and device for positioning a power tong at a pipe joint

E - Fixed Constructions

21

B

E21B 19/16 (2006.01) E21B 19/20 (2006.01)

Patent

CA 2630787

A method and device for positioning a power tong (2) at the pipe joint (14) of a pipe string (12), where, after the pipe joint (14) has been brought within the working area of the power tong (2), the power tong (2) must be displaced to a position that corresponds with that of the pipe joint (14), and where a camera (16) which may be displaced in parallel with the pipe (12), and which is linked to a display (18), is displaced until the image of the pipe joint (14) coincides with a marker (40) in the display, whereupon a signal is transmitted to a control (26), indicating that the power tong (2) is to be displaced to a position that corresponds with that of the camera (16) and thereby that of the pipe joint (14).

La présente invention concerne un procédé et un dispositif de positionnement de tenailles (2) à moteur au niveau d~un joint de canalisation (14) d~un tronçon de canalisation (12), selon lesquels, après que le joint de canalisation (14) a été amené dans la zone de travail des tenailles (2) à moteur, les tenailles (2) à moteur doivent être déplacées dans une position correspondant à celle du joint de canalisation (14) et selon lesquels une caméra (16) pouvant être déplacée parallèlement à la canalisation (12) et reliée à un écran (18), est déplacée jusqu~à ce que l~image du joint de canalisation (14) coïncide avec un repère (40) sur l~écran, ce qui provoque la transmission d~un signal à un dispositif de commande (26), indiquant que les tenailles à moteur (2) doivent être déplacées dans une position correspondant à celle de la caméra (16) et donc à celle du joint de canalisation (14).

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