Active liquid level control gas-liquid separator by using gravity ball

Abstract

The invention aims to provide an active liquid level control gas-liquid separator by using a gravity ball. The active liquid level control gas-liquid separator comprises an outer barrel and an inner barrel. The top of the inner barrel stretches into the outer barrel, the bottom of the inner barrel stretches out of the external part of the bottom of the outer barrel, a liquid phase lead-out openingof the separator is formed in the outer barrel, the liquid phase lead-out opening of the separator comprises a transverse low end pipe, a vertical pipe and a transverse high end pipe, the transverselow end pipe, the vertical pipe and the transverse high end pipe are connected successively, the gravity ball is arranged at a communicating part of the vertical pipe and the transverse high end pipe,the transverse low end pipe is located at the bottom end of the outer barrel, an impeller is mounted in the inner barrel, a liquid drainage section is arranged on the upper part of the inner barrel,a gas phase lead-out opening of the separator is mounted on the top of the outer barrel, a water retaining plate is arranged below the gas phase lead-out opening of the separator, the water retainingplate is connected to the top of the outer barrel through a connecting rod, an inlet flange is mounted at the bottom of the inner barrel, and an outlet flange is mounted on the top of the gas phase lead-out opening of the separator. The active liquid level control gas-liquid separator can achieve efficient separation through regulating and controlling the liquid level without external intervention.

Description

technical field [0001] The invention relates to a gas-liquid separator, in particular to a downhole gas-liquid separator. 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 refined gas-liquid...

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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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