Method and apparatus for controlling drill string torsional...

Details Method and apparatus for controlling drill string torsional... Method and apparatus for controlling drill string torsional...

E - Fixed Constructions

21

B

E21B 7/00 (2006.01) E21B 44/04 (2006.01)

Patent

CA 2266248

The invention relates to a method and apparatus for controlling drill string vibrations during drilling. The apparatus includes a device for measuring the applied torque on the drill string and controller for adjusting the motor driving the drill string to maintain the applied drill string torque at a preselected constant value.

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