An electro-hydraulic emergency shutdown system and control method for testing process

Abstract

The invention discloses an electro-hydraulic emergency shutdown system for testing procedures, which is characterized by comprising: a plurality of remote control button boxes, which are connected in parallel through multi-core cables; and an electric control panel, which is connected with the plurality of remote control button boxes in parallel. A control button box is connected, and the electric control panel has a data communication interface; a solenoid valve box, which is connected with the electric control panel; an induction gas line, one end of which is connected with the solenoid valve box; a hydraulic control panel, It is connected with the other end of the induction gas line. The invention also discloses a control method for an electro-hydraulic emergency shutdown system used in a testing process. The electro-hydraulic emergency shutdown system is controlled by bus control or signal input to isolate the surface testing process from the testing wellbore, and electrical signals are used to control the electro-hydraulic emergency shutdown system. The control method shortens the response time of the shutdown system.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas exploration and testing, and more particularly, 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 up the ESD button to open the pressure relief valve, release the pilot gas pressure, activate the hydraulic control panel, and 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 a number of pilot signal gas pipelines with a length of tens of meters. The hydraulic control panel is controlled. The length of the pilot signal gas pipeline directly affects the shut-off ...

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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