Multistage Throttle Intelligent Control System

In recent years, Because the single throttling control system's ability of bearing the pressure is low, it can not meet the need of high-pressure gas well exploration and development of Tarim oil field. Under this background , the multiple throttling control system arises at the historic moment. It uses several choke valves to reduce the pressure to the high-pressure fluid, making the pressure born on the individual choke valve lower than 40Mpa. The using of multiple throttling control system reduces the load on the choke valve , and improves the working envirment the key component in the choke valve.The multiple throttling system is a set of complicated equipment combining electromechanical technology with computer-control technology. In this paper, the author apply petroleum engineering well-control theory to analyze operational principle of multilevel throttling control system in depth, set up electrohydraulic proportional valve hydraulic pressure control system mathematics model and use MATLAB to make emulation analysis to it. According to dynamic and static characteristic of every step gained through system analysis, control tactic has been brought forward which combine PID with expertise experience, and related controller has also been designed. In addition, on the basis of research on controller, related data acquisition of the multilevel throttle intelligence control system has been finished, the design of control hardware and related engineering software has also been accomplished.