Shaft liquid level monitoring device

Abstract

The invention relates to a shaft liquid level monitoring device. The shaft liquid level monitoring device comprises a microphone used for receiving reflected waves, and further comprises a shaft sleeve joint, an air inlet electromagnetic valve, a middle air chamber and a pressure relief electromagnetic valve which are connected in sequence, and the pressure relief electromagnetic valve is providedwith a pressure relief valve outlet used for being communicated with external atmosphere or a gas treatment device. The shaft liquid level monitoring device further comprises an air inlet side air pressure sensor, an air outlet side air pressure sensor and a controller, the air inlet side air pressure sensor and the air outlet side air pressure sensor are in signal connection with the controller,and the air inlet electromagnetic valve and the pressure relief electromagnetic valve are in control connection with the controller. Opening and closing of the air inlet electromagnetic valve and thepressure relief electromagnetic valve are separately controlled through the controller, then the pressure of the middle air chamber is controlled, the pressure difference between the air inlet side and the air outlet side of the air inlet electromagnetic valve can be accurately controlled to be a set pressure difference, the set pressure difference can correspond to sound wave signals with a highsignal-to-noise ratio, and the liquid level monitoring precision is guaranteed.

Description

technical field [0001] The invention relates to a wellbore liquid level monitoring device. Background technique [0002] High-sulfur gas fields are rich in geological reserves. During the development of high-pressure, high-sulfur gas wells producing liquid, long-term continuous monitoring of wellbore liquid level depth has important guiding significance for the adjustment of working systems and the formulation of measures for high-pressure liquid-producing gas wells. In the prior art, the echo method is used to monitor the high-pressure continuous liquid level, and the casing gas is released by controlling a single solenoid valve instantaneously to generate an acoustic signal. It is equipped with a high-precision microphone for receiving reflected waves. By analyzing and processing the propagation time of the sound wave in the barrel, the depth of the wellbore liquid level can be obtained. The specific liquid level monitoring device such as the authorized announcement number...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a wellbore liquid level monitoring device to solve the problem that the liquid level monitoring device in the prior art cannot realize the precise control of the test pressure difference and the liquid level monitoring accuracy is low

Images