Design and experimental study of electro hydraulic control system for deepwater testing riser module

Abstract

The operational environment for deep-sea oil and gas extraction is characterized by its complexity and dynamic nature, rendering it susceptible to emergencies such as typhoons and tsunamis, which can precipitate significant safety incidents. This paper addresses the critical need for rapid disconnection of subsea pipelines and safe evacuation of floating platforms during such contingencies. We innovatively propose a fast-response deep-water testing positioning column electro-hydraulic system, complemented by a fuzzy PID control. A comprehensive joint simulation model is constructed to rigorously analyze the stability of the positioning column’s electro-hydraulic control system. Through a series of terrestrial experiments incorporating diverse test signals, we further validate the dynamic performance stability and anti-interference capabilities of the electro-hydraulic control system. Our findings indicate that the designed riser control module electro-hydraulic system ensures the stable operation of the positioning column during oil and gas extraction processes. Specifically, during step signal tracking, the fuzzy PID control achieves a peak time of 8.3 s, a regulation time of 8.8 s, and an overshoot of 7%. For sinusoidal signal tracking, the amplitude ratio of the fuzzy PID control’s tracking curve is 1.01, with an overshoot of 1%, and the control system error is consistently maintained within ±1 mm. These results underscore the superior dynamic performance of the proposed fuzzy PID control strategy. This research not only provides a robust theoretical foundation and empirical data for the development of riser control module electro-hydraulic systems in deep-water testing but also delineates future research directions in this critical domain.