Horizontal drilling system with oscillation control

E - Fixed Constructions – 21 – B

Patent

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E21B 44/00 (2006.01)

Patent

CA 2636249

A system and method for controlling drill string frictional forces during horizontal drilling are provided. The system includes a top drive having a motor that transmits a torque to a drill string to rotate the drill string, and an automated controller operably connected to the top drive to send at least one command signal to the top drive to initiate the rotation of the drill string. The controller monitors torque feedback signals, indicating that a torque limit on the drill string is exceeded, and/or a turn feedback signals indicating that the drill string is stalled to control the direction of the torque applied to the drill string when either the torque limit is exceeded or the drill string stalls.

La présente invention concerne un système et un procédé pour contrôler les forces de frottement de train de tiges de forage au cours du forage horizontal. Le système comprend un entraînement par le haut qui comporte un moteur qui transmet un couple à un train de tiges de forage pour faire tourner le train de tiges de forage, et un contrôleur automatisé connecté de façon opérationnelle à l'entraînement par le haut pour envoyer au moins un signal de commande à l'entraînement par le haut pour commencer la rotation du train de tiges de forage. Le contrôleur surveille des signaux de rétroaction de couple qui indiquent d'une limite de couple sur le train de tiges de forage est dépassée, et/ou des signaux de rétroaction de tour qui indiquent que le train de tiges de forage a calé pour contrôler la direction du couple appliqué sur le train de tiges de forage lorsque la limite de couple est dépassée ou le train de tiges de forage cale.

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