Abstract: The intelligentwell control system is the machine-electrofluid integration system using the computer to monitor and control real-time to pressure of thewellmouth. The system adopted the computer electro-fluid proportional closed-loop contro.l The mathematicalmodelof the system was established through the reearch. Putting to use themethod of the PID and the expertcontrol, The computer autocontrol realized to the throttle well control system combining with the knowledge related to petroleum gaswell contro.l Moving the throttle valve to the fluid the valve core displacement and the valve pressure drop carries on the quite accurate contro.l Themaximum controlpressure of the designwas 105MPa.The error of the pressure controlwas less than 0. 5MPa. Through theTalimu field testof this system itgot consummation. the test indicated the system work steady, the pressure control precision was high.

Key words: computer contro, l electro-liquid proportional contro, l mathematicalmode, l controlmethod