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

A gas-liquid separator and liquid level control technology, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of hysteresis, small oil well holes, high pressure, etc., and reduce the impact height and strength, Improve separation efficiency and weaken the effect of axial impact

Pending Publication Date: 2020-03-31
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] Embodiment 1: Combining Figure 1-2 , the main structure of the separator is composed of: an inner cylinder 1, an outer cylinder 10, and a gravity ball 13. The gas phase outlet 8 and the liquid phase outlet 12 of the separator are respectively located at the top and bottom of the outer cylinder 10; the gravity ball 13 is located in the liquid phase In the outlet 12, an activity area is reserved above it; the liquid phase outlet 12 is connected to the bottom of the outer cylinder 10 by the principle of a connector; a water barrier 6 is arranged below the gas phase outlet 8, and is fixed on the outer cylinder 10 by a connecting rod 7 Top; the upper part of the inner cylinder 1 is provided with a drainage section 4, and a drainage hole is opened in the drainage section 4; a gravity separation chamber 11 is arranged above the outlet of the inner cylinder 1; an impeller is arranged under the drainage section 4 3. A development section 4 to 10 times as long as the inner diam...

Embodiment approach 2

[0050] Embodiment 2: Combining image 3 , On the basis of Embodiment 1, the outlet cylinder 15 is added, and the impeller 3 is changed to a first-stage impeller 23 and a second-stage impeller 33 . A primary impeller 23 is installed in the inner tube 1, and a secondary impeller 33 is installed in the outlet of the inner tube 1. The outlet tube 15 is a transparent structure, and the outlet tube 15 is located above the inner tube 1 and below the water retaining plate 6. A water-shielding ring 14 is installed on the outside of the lower end of the outlet tube 15, and at least one separation orifice is installed on the outside of the outlet tube 15, and the separation orifice is connected to the outer The inner wall of the cylinder 10.

[0051] When performing gas-liquid separation, the technical solution is: the body of the separator is installed and fixed through the inlet flange 2 and the outlet flange 9 . The gas-liquid mixture enters the separator from the inlet port of the ...

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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...

Claims

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Application Information

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IPC IPC(8): E21B43/38
CPCE21B43/38
Inventor 范广铭曾晓波赵乐阎昌琪祝福强侯明文赵伟光
Owner HARBIN ENG UNIV
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