連續(xù)管防噴器控制系統(tǒng)的壓力控制策略研究

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Pressure Control Strategy of Coiled Tubing Blowout Preventer Control System

Hu Yaxuan WuWenxiu （School ofMechanical Engineering，Yangtze University）

Abstract：The wall of coiled tubing is relatively thin and its pressure-bearing capacity is limited.To avoid damage to coiled tubing or inabilitytoquickly nipof coiled tubing during theoperation ofthe blowout preventer，a control strategy for outlet pressure of blowout preventer control system was studied.To solve the problemof slow response and poor control accuracy inconventional PID control，fuzzy theory was combined with PID control technology to form fuzzyPIDcontrol，soas to improve the pressure controlaccuracyand response speed of thecontrol system.By means of building a mathematical model of electromagnetic relief valve- the main actuator in the control system，the MATLAB/Simulink simulations were used to obtain the step responses offuzzyPIDcontrol and conventional PID control respectively，and the results werecompared and analyzed.The study results show that the response speed of fuzzy PID control is 21.44 % faster，the accuracy is improved by 1.33% and the overshoot is reduced by 13% compared to conventional PID control，resulting in a significant improvement in control quality. The studyconclusions provide a new solution to pressure control of coiled tubing control system，making the action of the blowout preventer more reliable and faster.

Keywords： coiled tubing blowout preventer;control system；pressure control strategy；electromagnetic relief valve；PID simulation control model

0 引言

連續(xù)管帶壓作業(yè)一旦發(fā)生井噴事故將會帶來巨大的經(jīng)濟損失，對環(huán)境產(chǎn)生不可逆的傷害，并且可能威脅現(xiàn)場工作人員的生命安全[]。（剩余8959字）