Wide-flow-path highly-efficient gas-liquid separator controlled by utilizing buoy

Abstract

The invention aims to provide a wide-flow-path highly-efficient gas-liquid separator controlled by utilizing a buoy. The wide-flow-path highly-efficient gas-liquid separator comprises an outer cylinder and a core cylinder, wherein the upper end part of the core cylinder extends into the outer cylinder; the lower end part of the core cylinder extends out of the lower part of the outer cylinder; animpeller is arranged in the core cylinder; a liquid discharge section is arranged at the upper part of the core cylinder; a gas-phase lead-out opening is arranged at the upper end part of the outer cylinder; a water baffle plate is arranged below the gas-phase lead-out opening and fixedly arranged at the upper end part of the outer cylinder through a connecting rod; a separator liquid-phase lead-out opening is arranged at the lower end of the outer cylinder; a partition plate is arranged at the communication position of the liquid-phase lead-out opening and the interior of the outer cylinder;a movable buoy sleeves the core cylinder; the partition plate is connected with the movable buoy through a connecting shaft; an inlet flange is installed at the lower end part of the core cylinder; and an outlet flange is installed at the upper end part of the gas-phase lead-out opening. The wide-flow-path highly-efficient 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, in particular to a downhole gas-liquid separation device. 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; "a re...

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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