A high-pressure jet pump gas-liquid extraction and transportation system

Abstract

A high-pressure jet pump gas-liquid extraction and transportation system, relating to the field of oil and gas extraction technology, includes an oil and gas well, a gas-liquid separator, and a jet pump. The gas-liquid separator has a liquid inlet on one side of its lower end, a gas outlet at its top, and a liquid outlet at its bottom. The jet pump has a liquid inlet at one end, a liquid outlet at the other end, and a produced liquid inlet at its top. The gas-liquid separator contains a spiral guide plate, the upper end of which is tangent to the liquid inlet direction, and the lower end of which extends into the lower cone of the gas-liquid separator. A central tube is connected to the inner side of the spiral guide plate, and the upper end of the central tube is connected to the gas outlet. The gas-liquid separator of this invention achieves gas-liquid separation under the action of rotational motion and centrifugal force, resulting in high separation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas extraction technology, specifically to a high-pressure jet pump gas-liquid extraction and transportation system. Background Technology

[0002] The gas-liquid production and transportation system at the wellhead is a crucial link connecting the wellhead to the gathering and transportation network in oil and gas extraction, and its efficiency directly affects extraction costs and resource utilization. This system mainly includes a gas-liquid separator, a booster pump, a negative pressure diversion pump, and other auxiliary devices. Currently, most gas-liquid separators in gas-liquid production and transportation systems use gravity settling for gas-liquid separation. Gravity settling separation is relatively slow, reducing production and transportation efficiency. Therefore, there is an urgent need for a separator that can improve the gas-liquid separation speed to enhance production and transportation efficiency. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high-pressure jet pump gas-liquid extraction and transportation system, which can solve the technical problem that most gas-liquid separation tanks in existing gas-liquid extraction and transportation systems use gravity sedimentation to achieve gas-liquid separation, which has a relatively slow separation speed and reduces extraction and transportation efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A high-pressure jet pump gas-liquid production and transportation system includes an oil and gas well, a gas-liquid separator, and a jet pump. The gas-liquid separator has a liquid inlet on one side of its lower end, a gas outlet at its top, and a liquid outlet at its bottom. The jet pump has a liquid inlet at one end, a liquid outlet at the other end, and a produced fluid inlet at its top. The liquid inlet of the jet pump is connected to the liquid outlet of the gas-liquid separator, and the liquid outlet of the jet pump is connected to the liquid inlet of the gas-liquid separator. The produced fluid inlet of the jet pump is connected to the outlet end of the oil and gas well, and the outlet end of the oil and gas well is also connected to a gas outlet pipeline connected to the gas outlet at the top of the gas-liquid separator. A spiral guide plate is provided inside the gas-liquid separator. The upper end of the spiral guide plate is tangent to the liquid inlet direction, and the lower end of the spiral guide plate extends into the lower cone of the gas-liquid separator. A central pipe is connected to the inner side of the spiral guide plate, and the upper end of the central pipe is connected to the gas outlet.

[0006] Preferably, the central tube is a tube structure that runs vertically through the tube, and multiple sets of umbrella-shaped separators are provided inside the central tube, with a defoaming screen above each umbrella-shaped separator.

[0007] Preferably, the jet pump has a nozzle in its inlet and a diffuser in its outlet, and a mixing chamber between the diffuser and the nozzle, which is connected to the inlet of the produced fluid.

[0008] Preferably, a first valve, a filter, and a booster pump are provided on the pipeline between the outlet of the gas-liquid separator and the inlet of the jet pump; a second valve is provided on the pipeline between the outlet of the jet pump and the inlet of the gas-liquid separator; a third valve is provided on the pipeline between the outlet of the oil and gas well and the produced fluid inlet of the jet pump; a fourth valve is provided on the pipeline connecting the outlet of the oil and gas well and the gas outlet pipeline; and a fifth valve and a gas flow meter are provided on the gas outlet pipeline.

[0009] Preferably, the gas-liquid separator is provided with a safety valve and a vent valve at its top, and a manhole is provided on one side of the gas-liquid separator.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. The gas-liquid separator of this utility model achieves gas-liquid separation under the action of rotational motion and centrifugal force, resulting in high separation efficiency. Oil and gas enter the gas-liquid separator tangentially through the liquid inlet and move downward along the spiral guide plate. When the rotating and descending oil and gas enters the lower cone, it moves towards the center of the gas-liquid separator due to the contraction of the cone, and its tangential velocity continuously increases. When it reaches a certain position in the cone, it flips upward in the same direction of rotation, forming an internal swirling airflow, which is discharged through the gas outlet. The separated oil moves downward under the action of centrifugal force and is discharged through the liquid outlet, achieving rapid separation.

[0012] 2. In the gas-liquid separator of this utility model, when the gas moves upward in the central tube, it passes through multiple sets of umbrella plate separators, which can separate the larger oil droplets carried by the gas, causing the oil droplets to coalesce on the umbrella plate separators and flow downward. The rising gas passes through the umbrella plate separators and then through the defoaming screen to separate the small oil droplets carried in the gas, causing them to condense into larger oil droplets and sink, thereby improving the separation efficiency and ensuring the separation effect. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1-Oil and gas well, 2-Gas-liquid separator, 3-Jet pump, 4-Liquid inlet, 5-Gas outlet, 6-Liquid outlet, 7-Liquid inlet hole, 8-Liquid outlet hole, 9-Produced fluid inlet hole, 10-Gas outlet pipeline, 11-Spiral guide plate, 12-Central pipe, 13-Umbrella plate separator, 14-Fogging screen, 15-Nozzle, 16-Diffuser, 17-Mixing chamber, 18-First valve, 19-Filter, 20-Booster pump, 21-Second valve, 22-Third valve, 23-Fourth valve, 24-Fifth valve, 25-Gas flow meter, 26-Safety valve, 27-Vent valve, 28-Manhole. Detailed Implementation

[0017] The invention will now be described in detail with reference to the accompanying drawings, by way of example. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Example

[0018] like Figure 1 As shown, this utility model discloses a high-pressure jet pump gas-liquid production and transportation system, including an oil and gas well 1, a gas-liquid separator 2, and a jet pump 3. Specifically, the gas-liquid separator 2 has a liquid inlet 4 on one side of its lower end, a gas outlet 5 at its top, and a liquid outlet 6 at its bottom. The jet pump 3 has a liquid inlet 7 at one end, a liquid outlet 8 at the other end, and a produced fluid inlet 9 at its top. The liquid inlet 7 of the jet pump 3 is connected to the liquid outlet 6 of the gas-liquid separator 2, and the liquid outlet 8 of the jet pump 3 is connected to the liquid inlet 4 of the gas-liquid separator 2. The produced fluid inlet 9 of the jet pump 3 is connected to the outlet end of the oil and gas well 1. The outlet end of the oil and gas well 1 is also connected to the gas outlet line 10 connected to the gas outlet 5 at the top of the gas-liquid separator 2. The gas-liquid separator 2 is provided with a spiral guide plate 11. The upper end of the spiral guide plate 11 is tangent to the liquid inlet 4. The lower end of the spiral guide plate 11 extends into the lower cone of the gas-liquid separator 2. A central tube 12 is connected to the inner side of the spiral guide plate 11. The upper end of the central tube 12 is connected to the gas outlet 5. The gas-liquid separator 2 of this invention achieves gas-liquid separation under the action of rotational motion and centrifugal force, with high separation efficiency. Oil and gas enter the gas-liquid separator 2 tangentially through the liquid inlet 4 and move downward along the spiral guide plate 11. When the rotating and descending oil and gas enters the lower cone, it moves towards the center of the gas-liquid separator 2 due to the contraction of the cone, and its tangential velocity continuously increases. When it reaches a certain position of the cone, it flips upward in the same rotational direction to form an internal swirling airflow, which is discharged through the gas outlet 5. The separated oil moves downward under the action of centrifugal force and is discharged through the liquid outlet 6, achieving rapid separation.

[0019] Furthermore, in this embodiment, the central tube 12 is a through-tube structure, and two sets of umbrella-shaped separators 13 are provided inside the central tube 12. A defoaming screen 14 is provided above the umbrella-shaped separators 13. When the gas moves upward in the central tube 12, after passing through the two sets of umbrella-shaped separators 13, the larger oil droplets entrained in the gas can be separated, causing the oil droplets to coalesce on the umbrella-shaped separators 13 and flow downward. The rising gas passes through the umbrella-shaped separators 13 and then through the defoaming screen 14, which separates the small oil droplets entrained in the gas, causing them to condense into larger oil droplets and sink, thereby improving the separation efficiency and ensuring the separation effect.

[0020] The jet pump 3 has a nozzle 15 inside its inlet 7 and a diffuser 16 inside its outlet 8. A mixing chamber 17 is located between the diffuser 16 and the nozzle 15 and is connected to the produced fluid inlet 9. The oil separated by the gas-liquid separator 2 is ejected at high speed from the nozzle 15, continuously carrying away the air in the mixing chamber 17 and creating a vacuum. Under negative pressure, the oil and gas in the oil and gas well 1 are drawn into the mixing chamber 17 through the produced fluid inlet 9 and mixed with the high-pressure oil. The mixture diffuses in the diffuser 16 and then enters the gas-liquid separator 2 through the inlet 4 for separation.

[0021] The pipeline between the outlet 6 of the gas-liquid separator 2 and the inlet 7 of the jet pump 3 is equipped with a first valve 18 for sealing the pipeline, a filter 19 for filtering the oil, and a booster pump 20 for pressurizing the oil; the pipeline between the outlet 8 of the jet pump 3 and the inlet 4 of the gas-liquid separator 2 is equipped with a second valve 21 for sealing the pipeline; the pipeline between the outlet end of the oil and gas well 1 and the produced fluid inlet 9 of the jet pump 3 is equipped with a third valve 22 for sealing the pipeline; the pipeline connecting the outlet end of the oil and gas well 1 to the gas outlet pipeline 10 is equipped with a fourth valve 23 for sealing the pipeline; the gas outlet pipeline 10 is equipped with a fifth valve 24 for sealing the gas outlet pipeline 10 and a gas phase flow meter 25 for measuring the gas mass flow rate.

[0022] The gas-liquid separator 2 is equipped with a safety valve 26 and a vent valve 27 at its top, and a manhole 28 is provided on one side of the gas-liquid separator 2.

[0023] Working principle: A portion of the oil separated by the gas-liquid separator 2 is pressurized by the booster pump 20 and enters the inlet 7 of the jet pump 3. It is then ejected at high speed through the nozzle 15, creating a negative pressure in the mixing chamber 17. Under the action of the negative pressure, the oil and gas in the oil and gas well 1 are drawn into the mixing chamber 17 through the produced fluid inlet 9 and mixed with the high-pressure oil. The mixture diffuses in the diffuser 16, and the mixed gas and liquid enter the gas-liquid separator 2 through the inlet 4 for separation.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and application concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-pressure jet pump gas-liquid production and transportation system, comprising an oil and gas well (1), a gas-liquid separator (2), and a jet pump (3), characterized in that: The gas-liquid separator (2) has a liquid inlet (4) on one side of the lower end, a gas outlet (5) at the top end, and a liquid outlet (6) at the bottom end. The jet pump (3) has an inlet hole (7) at one end and an outlet hole (8) at the other end, and a collected liquid inlet hole (9) at the top. The inlet (7) of the jet pump (3) is connected to the outlet (6) of the gas-liquid separator (2), the outlet (8) of the jet pump (3) is connected to the inlet (4) of the gas-liquid separator (2), the produced liquid inlet (9) of the jet pump (3) is connected to the outlet end of the oil and gas well (1), and the outlet end of the oil and gas well (1) is also connected to the gas outlet pipeline (10) connected to the gas outlet (5) at the top of the gas-liquid separator (2). The gas-liquid separator (2) is provided with a spiral guide plate (11). The upper end of the spiral guide plate (11) is tangent to the liquid inlet (4) in the direction of liquid inlet. The lower end of the spiral guide plate (11) extends into the lower cone of the gas-liquid separator (2). A central tube (12) is connected to the inner side of the spiral guide plate (11). The upper end of the central tube (12) is connected to the gas outlet (5).

2. The high pressure jet pump gas-liquid extraction and delivery system of claim 1, wherein: The central tube (12) is a tube structure that runs vertically through the tube. Multiple sets of umbrella-shaped separators (13) are provided inside the central tube (12), and a foam-breaking net (14) is provided above the umbrella-shaped separators (13).

3. The high pressure jet pump gas-liquid extraction and delivery system of claim 1, wherein: The jet pump (3) has a nozzle (15) in its inlet hole (7) and a diffuser (16) in its outlet hole (8). A mixing chamber (17) is provided between the diffuser (16) and the nozzle (15), and the mixing chamber (17) is connected to the inlet hole (9) of the extracted liquid.

4. The high pressure jet pump gas and liquid extraction and delivery system of claim 1, wherein: A first valve (18), a filter (19), and a booster pump (20) are installed on the pipeline between the outlet (6) of the gas-liquid separator (2) and the inlet (7) of the jet pump (3); a second valve (21) is installed on the pipeline between the outlet (8) of the jet pump (3) and the inlet (4) of the gas-liquid separator (2); a third valve (22) is installed on the pipeline between the outlet end of the oil and gas well (1) and the produced fluid inlet (9) of the jet pump (3); a fourth valve (23) is installed on the pipeline connecting the outlet end of the oil and gas well (1) and the gas outlet pipeline (10); a fifth valve (24) and a gas phase flow meter (25) are installed on the gas outlet pipeline (10).

5. The high pressure jet pump gas and liquid extraction and delivery system of claim 1, wherein: The gas-liquid separator (2) is provided with a safety valve (26) and a vent valve (27) at its top, and a manhole (28) is provided on one side of the gas-liquid separator (2).

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