Gas-liquid separator capable of realizing liquid level dynamic equilibrium

Abstract

The invention aims to provide a gas-liquid separator capable of realizing liquid level dynamic equilibrium. The gas-liquid separator comprises an outer cylinder, an inner cylinder and a core cylinder,wherein the top of the core cylinder stretches above the middle of the interior of the outer cylinder; the bottom of the core cylinder stretches to the external part of the bottom of the outer cylinder; the inner cylinder is positioned between the outer cylinder and the core cylinder; the upper end part of the inner cylinder is connected with the inner wall of the outer cylinder; a space allowinga liquid phase to flow out is arranged between the lower end part of the inner cylinder and the inner wall of the outer cylinder; a separator liquid phase outlet is formed in the outer cylinder and is positioned below the connecting part of the inner cylinder and the outer cylinder; an impeller is mounted in the core cylinder; a liquid discharging section is arranged at the upper part of the corecylinder; a separator gas phase outlet is formed in the top of the outer cylinder; a water fender is arranged below the separator gas phase outlet and is connected with the top of the outer cylinderthrough a connecting rod; an inlet flange is mounted at the bottom of the core cylinder; and an outlet flange is mounted at the top of the separator gas phase outlet. The gas-liquid separator is mainly used in a well, and when the inlet flow rate changes, the gas-liquid separator can still realize efficient separation without external intervention and adjustment of the liquid level.

Description

technical field [0001] The invention relates to a gas-liquid separation device, in particular to a gas-liquid separation device for downhole. Background technique [0002] Gas-liquid separation technology has a wide range of applications in petrochemical, energy utilization, nuclear energy development and other fields. Downhole gas-liquid separation is of great significance for oil production and prolonging the economic life of high liquid-cut wells. The gas-liquid mixture to be separated downhole has the characteristics of wide range of gas-liquid flow rate and various flow patterns. [0003] At present, a variety of high-efficiency gas-liquid separators suitable for a wide range of gas-liquid flow rates and diverse flow patterns have been proposed (“a double-barrel gas-liquid separator”, CN 110075622 A; “a wide-flow multi-flow type high-efficiency gas-liquid separator”) liquid separator", CN 110075619A; "a combined high-efficiency gas-liquid separator", CN 110075618 A; "...

AI Technical Summary

Problems solved by technology

[0005] 1. The gas-liquid separator is placed at a distance of 1,000 meters underground, and the space is so small that personnel cannot reach the installation position of the separator to perform manual liquid level control in real time;

[0006] 2. The hole of the oil well is narrow and only slightly larger than the diameter of the pipeline. It is very difficult to arrange the supporting measurement and control equipment. At the same time, when the equipment is damaged, the entire pipeline needs to be taken out, and the maintenance cost is high;

[0007] 3. The operating environment pressure of the separator is as high as several megapascals, and the measuring device that can operate normally in this high-pressure environment cannot meet the accuracy requirements of liquid level measurement;

[0008] 4. The liquid phase outlet flow is controlled by the ground cable, the control sensitivity is poor and has hysteresis, which cannot meet the requirements of precise real-time control

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