Electro-hydraulic emergency turn-off system for testing process and control method

Abstract

The invention discloses an electro-hydraulic emergency turn-off system for a test process. The system comprises a plurality of remote control button boxes which are connected in parallel through a multi-core cable, an electric control panel which is connected with the plurality of remote control button boxes, and is provided with a data communication interface, an electromagnetic valve box which is connected with the electric control panel, an induction gas pipeline and a hydraulic control panel, wherein one end of the induction gas pipeline is connected with the electromagnetic valve box; and the hydraulic control panel is connected with the other end of the induction gas pipeline. The invention further discloses a control method of the electro-hydraulic emergency turn-off system for testing the process, the electro-hydraulic emergency turn-off system is controlled through bus control or signal input so that the ground test process is isolated from a test shaft, and the response time of the turn-off system is shortened in an electric signal control mode.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas exploration and testing, and more specifically, the invention relates to an electro-hydraulic emergency shutdown system and a control method for a testing process. Background technique [0002] At present, the emergency shutdown system commonly used during offshore oilfield testing uses compressed air as the pilot signal. When an emergency occurs, pull the ESD button to open the pressure relief valve, and the pilot gas releases pressure to activate the hydraulic control panel to control the ground test tree or ground safety. The hydraulic control valve of the valve is closed to realize the emergency shutdown of the ground test process. The ESD button is connected to the hydraulic control panel through several tens of meters of pilot signal gas pipelines, and the hydraulic control panel is controlled. The length of the pilot signal gas pipeline directly affects the shutdown time. [00...

AI Technical Summary

Problems solved by technology

[0004] First, due to the influence of the number of cut-off points and the distance of the cut-off points, the pressure relief time of the pilot gas signal of the existing emergency shutdown system is long, which restricts the response time of the shutdown system, resulting in the shutdown time being generally 10s to 15s

[0005] Second, the nylon hose of the pilot signal is fragile and easy to leak. Once an accidental leakage or damage occurs, the controlled valve will not be able to open normally, resulting in the interruption of the operation. At the same time, it is difficult to confirm the leakage and correct it in the first place;

[0006] Third, it is difficult and risky to test high-temperature and high-pressure, high-yield gas wells, deep-water wells, and hydrogen sulfide wells. Once there is a high-pressure, high-yield fluid puncture and other dangerous situations, the leakage and diffusion of high-pressure fluid in the formation is very fast, and it takes 10 to 15 seconds. The shutdown response time cannot guarantee the safety requirements of the operation;

[0007] Fourth, the existing test emergency shutdown system cannot be incorporated into the shutdown system of the platform, and cannot meet the needs of high-end platform security integration

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