Design of fuzzy controller for electric rig constant WOB automatic drilling fuzzy system

According to the basic characteristics such as nonlinear and time-varying of the drilling pressure in the drilling process,a kind of electronic rig WOB automatic drilling technology is presented based on fuzzy control.The relative fuzzy control rules is established on the basis of fuzzy control theory and on-site driller's experiences.As well as the constant WOB automatic drilling system fuzzy controller is designed using vector control technology of bit-feed asynchronous motor.The simulation results show the well control effectness,and reponse speed of the system is also increased which give some guidance to the actual design and application.