Intubation pipe type gas-liquid separator based on differential pressure balance

Abstract

The invention aims to provide an intubation pipe type gas-liquid separator based on differential pressure balance. The intubation pipe type gas-liquid separator comprises an outer cylinder, a core cylinder and a lead-out pipe, wherein the upper part of the core cylinder extends into the outer cylinder; the lower part of the core cylinder extends out of the bottom part of the outer cylinder; the lead-out pipe comprises a transverse pipe and a vertical pipe which are in communication; the vertical pipe is positioned between the outer cylinder and the core cylinder and has a downward opening; theend part of the transverse pipe extends out of the outer cylinder; an impeller is installed in the core cylinder; a liquid discharging section is arranged at the upper part of the core cylinder; a gas-phase lead-out opening is arranged at the top part of the outer cylinder; a water baffle plate is arranged below the gas-phase lead-out opening of the separator and connected with the top part of the outer cylinder through a connecting rod; an inlet flange is installed outside of the bottom part of the core cylinder; and an outlet flange is installed at the top part of the gas-phase lead-out opening. The intubation pipe type gas-liquid separator provided by the invention does not need a person to participate in regulation and control, and can meet the requirements of highly-efficient gas-liquid separation under the conditions of gas-liquid flow changes and different flow patterns, specifically oscillating flow patterns.

Description

Technical field [0001] The invention relates to a gas-liquid separation device, specifically a downhole gas-liquid separation device. Background technique [0002] Gas-liquid separation technology has a wide range of applications in petrochemicals, energy utilization, nuclear energy development and other fields. Downhole gas-liquid separation is extremely important for oil exploitation and prolonging the economic life of high-liquid wells. The gas-liquid mixture to be separated downhole has the characteristics of a wide range of gas-liquid flow rate changes 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 diversified flow patterns have been proposed ("a double-barrel gas-liquid separator", CN 110075622 A; "a wide-flow multi-flow high-efficiency gas Liquid separator", CN 110075619A; "A combined high-efficiency gas-liquid separator", CN 110075618 A; "A refined gas-liquid separat...

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

[0009] The above problems have brought great difficulties to the precise control of the liquid level in the separator, which directly affects the separation efficiency of the separator.

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