FIELD: oil and gas industry.
SUBSTANCE: according to the rotation control method of drill string, connected to the drill bit inside the wellbore, angular speed is defined for at least a part of the drill string, an angular velocity threshold value is determined to prevent static friction, the minimum input torque is determined for application to a drill string for maintaining the angular velocity at the angular velocity threshold or above it, then a control signal is generated for the top drive motor at least partially based on a minimum input torque.
EFFECT: static friction overcoming with the minimum energy consumption.
20 cl, 6 dwg
