Constant-pressure deflation valve with process operation stability maintaining function for casing pipe of electric submersible pump well

By designing a fixed pressure relief valve in the casing of the electric submersible pump well, the repulsion of the energized solenoid group and the permanent magnet, combined with the air permeable gap of the pneumatic column and the cooperating sleeve and the cooperating process of the gas pressure retarding process, the gas pressure retarding process is formed, which solves the problems of mechanical fatigue and operational loss of conventional vent valves in complex downhole environments, and realizes the stability of the gas emission process and the long life of the gas-limiting structure.

CN119641291AActive Publication Date: 2025-03-18YANCHENG HUAYUE GASOLINEEUM MACHINERY MFGCO
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Patent Information

Application Number
CN202510153824.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-12
Publication Date
2025-03-18
Estimated Expiration
2045-02-12

AI Technical Summary

Technical Problem

In complex downhole environments, the air-limiting structure of conventional vent valves is prone to mechanical fatigue and operating losses when facing instantaneous high pressure or pressure fluctuations, resulting in a preset upper pressure limit deviation and affecting exhaust and sealing operations.

Method used

A fixed pressure discharge valve is designed, using the repulsive force formed by the energized electromagnetic group and the permanent magnet as the prestress, and the breathable gap between the pneumatic column and the cooperating sleeve is used as the displacement channel for gas flow. A gas barrier ring group, a primary and secondary air flap are provided on the pneumatic column and cooperating sleeve. Through the change of the diameter of the gas fluid and the cooperating process, a gas pressure retarding process is formed, reducing the working burden of the piston block structure.

Benefits of technology

It effectively avoids the high-pressure gas emission process to increase the working burden of the piston block structure, maintains the relatively stable state of the gas emission process, and extends the service life of the gas-limiting structure.

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Abstract

The invention discloses a constant-pressure deflation valve with a process operation stability maintenance function for an electric submersible pump well casing, which is improved and optimized based on the basic principle of the deflation valve, takes repulsive force as prestress and takes a ventilation gap as the only channel in the exhaust process, and is specifically characterized in that a first-stage air sheet, a second-stage air sheet and an air blocking ring group are arranged aiming at the position of the ventilation gap; the pneumatic column is driven to move upwards along with rising of gas pressure, a gas pressure'retarding 'process is formed between the first-stage gas piece and the second-stage gas groove and between the second-stage gas piece and the first-stage gas groove in the upward moving process, a middle gas groove and a co-action gas pipe are obtained based on improvement of the piston block and used for the high-pressure gas discharging process, and secondary gas discharging action is formed. The method is essentially characterized in that in the high-pressure gas emission process, the movement amplitude of the piston block is reduced through the gas pressure'slow speed 'process, the situation that the workload of the piston block in the movement process is increased in the high-pressure gas emission process is avoided, and the gas emission process is kept in a relatively stable state.
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