Dispersion device for oil field

Abstract

The invention discloses a dispersion device for oil fields, and relates to the technical field of oil production. The dispersion device for oil fields comprises a dry powder hopper and a mixing tank, wherein a screw conveyor is arranged at the lower part of the dry powder hopper, wherein the discharge port of the screw conveyor is connected to a gas condensation system, and the gas condensation system is connected to the mixing tank. The beneficial effect of the invention is as follows: by setting up a gas condensation system, the air temperature above the liquid surface of the water-powder mixer is controlled below the condensation point of water, and at the same time, the water temperature entering the water-powder mixer is controlled below the condensation point of water, so as to ensure that the water in the water-powder mixer does not generate water vapor, and prevent the polymer particles at the feed port from absorbing moisture, swelling and clogging. The airflow entering the air inlet is a horizontal cross-sectional airflow, and the polymer particles falling from the upper part in a waterfall shape meet each other. The airflow carries the polymer particles and blows them to the right direction. In this process, the polymer particles are dispersed and fall on the water surface, which reduces the probability of the polymer particles adhering to each other during the water-like process, and improves the polymer maturation quality.

Description

Technical Field

[0001] The invention relates to the technical field of oil production, in particular to a dispersion device for oil fields. Background Art

[0002] In order to improve the recovery rate of oil fields, polymer flooding is often used in tertiary oil recovery to increase crude oil production. The method is to mix polymer with water according to concentration requirements and then inject it into the ground to increase oil production and oil recovery efficiency. When the polymer mother liquor is configured, the polymer particles are transported to the mixing tank through a dispersing device through a screw conveyor. The current oil field dispersing device has the following problems: 1. The polymer particles will swell and increase in volume when they meet water, which makes the polymer particles close to each other stick together to form a sticky mass in the process of enlargement. These sticky colloids are no longer matured in water. They flow around in the mixing tank with the water flow, causing the outlet pipeline to be blocked, and they will also adhere to the mixing tank and the stirring paddle. If they are not cleaned in time, more polymer particles will adhere; 2. Since the discharge port of the screw conveyor is below the water surface, the polymer delivery pipe port is exposed to the water surface for a long time. Under the influence of moisture, the polymer at the discharge port absorbs moisture and expands and condenses, blocking the discharge port. Summary of the invention

[0003] In order to solve the problem that the polymer cannot be dispersed in the current dispersion device for oil fields, resulting in blockage of the delivery pipe, etc., the present invention provides a dispersion device for oil fields.

[0004] The technical solution provided by the present invention is: a dispersion device for oil fields, comprising a dry powder hopper and a mixing tank, a screw conveyor is arranged at the lower part of the dry powder hopper, and the discharge port of the screw conveyor is connected to a gas condensation system;

[0005] The air condensation system includes a water-powder mixer, which is a rectangular shell. The shell is provided with a water inlet, a water outlet, an air inlet, an air suction port and a feed port. The outlet of the screw conveyor is connected to the feed port. The feed port is located above the shell, and the feed port is close to the left side of the shell. The water inlet is located at the lower left part of the shell, the air inlet is located at the upper part of the water inlet, the water outlet is located at the lower right part of the shell, and the air suction port is located at the upper part of the water outlet. The air suction port and the air inlet are respectively connected to the heat exchanger A by pipelines, and the air suction port pipeline is connected in series with an air pump. The refrigerant pipeline of the heat exchanger A is connected to the refrigeration unit, and the water outlet is connected to the upper part of the mixing tank.

[0006] The mixing tank is provided with an agitator, a water inlet pipe and an external delivery pump. The water inlet pipe is connected to the water inlet of the water-powder mixer, the outer side of the water inlet pipe is connected to the tap water pipe, the water inlet pipe is connected in series with a heat exchanger B, and the refrigerant pipe of the heat exchanger B is connected to the refrigeration unit;

[0007] When the feed pipe enters the shell, the round tube turns into a slender mouth, and the length direction of the slender mouth is located in the left and right direction of the shell. When the air inlet enters the shell, the round tube turns into a slender mouth, and the length direction of the slender mouth is located in the horizontal direction of the shell.

[0008] The water outlet has a rising reverse U-shaped bend to control the liquid level in the shell, the air inlet is close to the feed port in height, and the air suction port is close to the liquid level in height.

[0009] A heating coil is provided in the mixing tank.

[0010] The refrigeration unit controls the air temperature at the air inlet to be between 2 and 8°C, and the refrigeration unit controls the water temperature at the water inlet to be between 2 and 6°C.

[0011] The beneficial effects of the present invention are as follows: by setting up an air condensation system, the air temperature above the liquid surface of the gouache mixer is controlled to be below the condensation point of water, and at the same time, the water temperature entering the gouache mixer is controlled to be below the condensation point of water, so as to ensure that the water in the gouache mixer does not generate water vapor, and prevent the polymer particles at the feed port from absorbing moisture, swelling and clogging. The airflow entering the air inlet is a horizontal cross-sectional airflow, which meets the polymer particles falling from above in a waterfall shape, and the airflow carries the polymer particles to the right direction. In this process, the polymer particles fall on the water surface in a dispersed manner, which reduces the probability of the polymer particles sticking to each other during the water-like process and improves the polymer maturation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Attached Figure 2 It is a structural schematic diagram of the gas condensation system of the present invention;

[0014] Attached Figure 3 It is the left side view of the water-powder mixer among the present invention.

[0015] In the figure: 1-dry powder hopper, 2-screw conveyor, 3-discharge port, 4-agitator, 5-water-powder mixer, 6-mixing tank, 7-external transfer pump, 8-water inlet pipe, 9-heat exchanger A, 10-refrigeration unit, 11-heat exchanger B, 12-heating coil, 13-air pump, 14-air intake, 15-air inlet, 16-feed port, 17-water inlet, 18-water outlet, 19-reverse U-bend, 20-shell. DETAILED DESCRIPTION

[0016] like Figures 1-2 As shown, the dispersion device for oil fields includes a dry powder hopper 1 and a mixing tank 6. A screw conveyor 2 is provided at the lower part of the dry powder hopper 1. The discharge port 3 of the screw conveyor 2 is connected to the gas condensation system.

[0017] The air condensation system includes a water-powder mixer 5, which is a rectangular shell 20. The shell 20 is provided with a water inlet 17, a water outlet 18, an air inlet 15, an air suction port 14 and a feed port 16. The discharge port 3 of the screw conveyor 2 is connected to the feed port 16. The feed port 16 is located above the shell 20, and the feed port 16 is close to the left side of the shell 20. The water inlet 17 is located at the lower left part of the shell 20. The air inlet 15 is located at the upper part of the water inlet 17. The water outlet 18 is located at the lower right part of the shell 20. The air suction port 14 is located at the upper part of the water outlet 18. The air suction port 14 and the air inlet 15 are respectively connected to the heat exchanger A9 by pipelines. The pipeline of the air suction port 14 is connected in series with the air pump 13. The refrigerant pipeline of the heat exchanger A9 is connected to the refrigeration unit 10, and the water outlet 18 is connected to the upper part of the mixing tank 6.

[0018] The mixing tank 6 is provided with a stirrer 4, a water inlet pipe 8 and an external delivery pump 7. The water inlet pipe 8 is connected to the water inlet 17 of the water-powder mixer 5. The outer side of the water inlet pipe 8 is connected to the tap water pipeline. The water inlet pipe 8 is connected in series with a heat exchanger B11. The refrigerant pipeline of the heat exchanger B11 is connected to the refrigeration unit 10.

[0019] like Figure 3 As shown, when the feed pipe 16 enters the shell 20, the round tube is transformed into a slender mouth, and the length direction of the slender mouth is located in the left and right direction of the shell 20. When the air inlet 15 enters the shell 20, the round tube is transformed into a slender mouth, and the length direction of the slender mouth is located in the horizontal direction of the shell 20.

[0020] The water outlet 18 has an ascending reverse U-shaped bend 19 to control the liquid level in the shell 20. The air inlet 15 is close to the feed inlet 16 in height, and the air suction port 14 is close to the liquid level in height.

[0021] A heating coil 12 is provided in the mixing tank 6 .

[0022] The refrigeration unit 10 controls the air temperature at the air inlet 15 to be between 2 and 8°C, and the refrigeration unit 10 controls the water temperature at the water inlet 17 to be between 2 and 6°C.

[0023] The airflow entering from the air inlet 15 is a horizontal cross-sectional airflow, which meets the polymer particles falling like a waterfall from above. The airflow carries the polymer particles and blows them to the right. During this process, the polymer particles are dispersed and fall on the water surface, and enter the mixing tank 6 at the same time as the water, and are heated, stirred and matured in the mixing tank 6. Since the water inlet temperature and the air inlet temperature are controlled below the condensation point of water, water vapor will not be generated when the water is mixed with the polymer particles, and the polymer particles at the feed port 16 will not absorb moisture, thereby not blocking the feed port 16.

[0024] By setting up an air condensation system, the air temperature above the liquid surface of the gouache mixer 5 is controlled below the condensation point of water, and the water temperature entering the gouache mixer 5 is controlled below the condensation point of water, to ensure that the water in the gouache mixer 5 does not generate water vapor, to prevent the polymer particles at the feed port 16 from absorbing moisture, swelling and clogging. The airflow entering the air inlet 15 is a horizontal cross-sectional airflow, which meets the polymer particles falling from the top in a waterfall shape, and the airflow carries the polymer particles to the right direction. In this process, the polymer particles fall on the water surface in a dispersed manner, which reduces the probability of the polymer particles sticking to each other during the water-like process and improves the polymer maturation quality.

Claims

1. A dispersion device for oil fields, comprising a dry powder hopper (1) and a mixing tank (6), characterized in that: A screw conveyor (2) is provided at the bottom of the dry powder hopper (1), and a discharge port (3) of the screw conveyor (2) is connected to a gas condensation system; The gas condensation system comprises a water-powder mixer (5), the water-powder mixer (5) is a rectangular shell (20), the shell (20) is provided with a water inlet (17), a water outlet (18), an air inlet (15), an air suction port (14) and a feed port (16), the outlet (3) of the screw conveyor (2) is connected to the feed port (16), the feed port (16) is located above the shell (20), the feed port (16) is close to the left side of the shell (20), and the water inlet (17) is located at the shell (2 0), the air inlet (15) is located at the upper part of the water inlet (17), the water outlet (18) is located at the lower part of the right side of the shell (20), the air intake (14) is located at the upper part of the water outlet (18), the air intake (14) and the air inlet (15) are respectively connected to the heat exchanger A (9) by pipelines, the pipeline of the air intake (14) is connected in series with the air pump (13), the refrigerant pipeline of the heat exchanger A (9) is connected to the refrigeration unit (10), and the water outlet (18) is connected to the upper part of the mixing tank (6); The mixing tank (6) is provided with a stirrer (4), a water inlet pipe (8) and an external transfer pump (7); the water inlet pipe (8) is connected to a water inlet (17) of a water-powder mixer (5); the outer side of the water inlet pipe (8) is connected to a tap water pipeline; a heat exchanger B (11) is connected in series to the water inlet pipe (8); a refrigerant pipeline of the heat exchanger B (11) is connected to a refrigeration unit (10); the refrigeration unit (10) controls the air temperature of the air inlet (15) to be between 2 and 8°C; and the refrigeration unit (10) controls the water temperature of the water inlet (17) to be between 2 and 6°C; When the feed port (16) enters the shell (20), the round tube is transformed into a slender opening, and the length direction of the slender opening is located in the left and right direction of the shell (20); when the air inlet (15) enters the shell (20), the round tube is transformed into a slender opening, and the length direction of the slender opening is located in the horizontal direction of the shell (20).

2. The oilfield dispersion device according to claim 1, characterized in that: The water outlet (18) has a rising reverse U-shaped bend (19) to control the liquid level in the shell (20), the air inlet (15) is close to the feed inlet (16) in height, and the air suction port (14) is close to the liquid level in height.

3. The oilfield dispersion device according to claim 1, characterized in that: A heating coil (12) is arranged in the mixing tank (6).

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