Gas well wellhead pressure-reducing well opening device

Abstract

The invention discloses a gas well wellhead pressure-reducing well opening device and is designed for solving the problems that gas production and well opening in an oil filed are difficult and workload of gas well management and maintenance is large. The device is composed of a valve body communicated with a pipeline, a main valve core and an auxiliary valve core which are located in the valve body, a valve cover connected with an electromagnetic head, a T-type core rod, a decompression channel and springs in cavities. Due to the springs, energy of two-stage transmission is stored and pressure of a throttle nozzle is reduced, remote pressure reducing and opening of a gas well are achieved, the difficulty that an existing electromagnetic valve can not open the gas well remotely at high pressure is solved, difficulty of the gas well management and the maintenance is reduced, labor consumption and material consumption are reduced, and safe and stable production is guaranteed. The device coordinates with a remote control system so that the functions of remote control of opening and closing the gas well, automatic protection at the high and low pressure and the like are achieved, the informationized management level of the single well is improved, and the device has wide application prospects in the field of gas field exploitation.

Description

technical field [0001] The invention relates to a wellhead depressurization and opening device for a gas well, belonging to the technical field of oilfield gas recovery. Background technique [0002] The Sulige gas field has a large area, a large number of wells, and scattered well locations. It adopts a medium-low pressure gas gathering mode. It is difficult to start wells after shutting down a large area, and the workload of gas well management and maintenance is huge. At present, the practical on-site remote well opening and closing device cannot realize the function of decompression and opening the well, and the valve core cannot be kept fully open, which may easily cause the solenoid valve to freeze and block in winter during application. At the same time, because the opening degree of the valve core is very small, sand is easy to accumulate on the sealing contact surface, which will cause internal leakage of the solenoid valve. Therefore, the device structure must be ...

AI Technical Summary

Problems solved by technology

[0002] The Sulige gas field has a large area, a large number of wells, and scattered well locations. It adopts a medium-low pressure gas gathering mode. It is difficult to open wells after large-scale well closures, and the workload of gas well management and maintenance is huge.

At present, the practical remote switch well device on site cannot realize the function of reducing pressure and opening the well, and the valve core cannot be kept fully open, which may easily cause the solenoid valve to freeze and block in winter

At the same time, since the opening degree of the valve core is very small, sand is easy to accumulate on the sealing contact surface, resulting in internal leakage of the solenoid valve.

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