Adaptive PID control of rotary drilling system with stick slip oscillation

The stick-slip oscillation in the drilling process can stall the drill bit and cause the equipment failure. In order to eliminate the stick-slip oscillation of the bit, the paper presents the adaptive PID control strategy of the drilling rotary system. The identification of adaptive control can ensure the drilling rotary system´s output tracking and maintain the optimal work condition during the wide change or uncertainty of rotating system parameters; and the PID control the dynamic response speed to accelerate and shorten the transition adjustment process. The application of the adaptive PID control strategy can improve the dynamic characters and enhance the stability and reliability of the drilling rotary system.