连续管防喷器控制系统的压力控制策略研究

打开文本图片集

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

连续管带压作业一旦发生井喷事故将会带来巨大的经济损失，对环境产生不可逆的伤害，并且可能威胁现场工作人员的生命安全[]。（剩余8959字）