Carbon dioxide bubble making equipment

Abstract

When the carbon dioxide foam making equipment is used, a foaming agent and water are fed into a first-stage mixing box to be blended and mixed to prepare required liquid, then the liquid is fed into a second-stage mixing box, carbon dioxide is injected into the second-stage mixing box to be mixed for the second time, carbon dioxide foam is prepared, then a fourth pump machine is started, and the fourth pump machine is started; a fourth pump machine inputs the prepared carbon dioxide foam in the second-stage mixing box into a coiled pipe in the water tank, and water in the water tank absorbs heat in the carbon dioxide foam in the coiled pipe at the moment to cool the carbon dioxide foam, so that during oil displacement, the stability of the carbon dioxide foam is higher, and damage and disappearance of the foam are reduced.

Description

Technical Field

[0001] This invention belongs to the field of carbon dioxide flooding, specifically a carbon dioxide foaming device. Background Technology

[0002] Carbon dioxide flooding technology is a technique that injects carbon dioxide into the oil reservoir to improve the oil recovery rate of the oil field. When carbon dioxide first comes into contact with the formation crude oil, it cannot form a miscible phase. However, under suitable pressure, temperature and crude oil composition conditions, carbon dioxide can form a miscible front. Supercritical fluid will extract heavier hydrocarbons from the crude oil and continuously concentrate the gas at the displacement front. Thus, carbon dioxide and crude oil become a miscible liquid, forming a single liquid phase, which can effectively displace the formation crude oil to the production well.

[0003] With the development of oil displacement technology, carbon dioxide foam flooding is an improved technology based on the original carbon dioxide flooding, used to enhance the oilfield recovery rate. By injecting carbon dioxide foam, the physical properties of the reservoir are changed to improve the fluidity and displacement effect of crude oil. However, during the preparation of carbon dioxide foam, the foam temperature in the preparation tank will increase due to continuous stirring. The temperature change will affect the interaction between the foaming agent and carbon dioxide, as well as the stability and performance of foam formation. Higher temperatures will reduce the stability of the foam. Summary of the Invention

[0004] The present invention provides a carbon dioxide foaming device to solve the problem of poor foaming stability in current carbon dioxide oil displacement applications.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A carbon dioxide foaming device includes a base on which a primary mixing tank, a water tank, and a secondary mixing tank are sequentially connected. A machine housing is disposed between the water tank and the secondary mixing tank. A fourth pump is installed inside the machine housing. A serpentine pipe connects to the inside of the water tank, with both ends of the serpentine pipe connected to the fourth pump and a discharge port located on the side wall of the water tank, respectively. A second pump is installed in the water tank, with both ends of the second pump connected to the primary and secondary mixing tanks via conveying pipes, respectively. An electric valve is installed at the end of the conveying pipe closest to the primary mixing tank, and the other end of the electric valve is connected to a discharge pipe. A first pump is installed at the top inside the primary mixing tank, with one end of the first pump connected to a water inlet pipe. A first flow valve is installed at the end of the first pump away from the water inlet pipe, and the end of the first flow valve away from the water inlet pipe is connected to the water tank via a pumping pipe.

[0007] Preferably, a motor is fixedly installed at the top center of the secondary mixing chamber, the output shaft of the motor is located at the bottom of the interior of the secondary mixing chamber, and a first stirrer is also provided at the bottom of the interior of the headphone mixer.

[0008] Preferably, the first stirrer has a needle-type structure.

[0009] Preferably, a third pump is fixedly installed on the right side of the top of the secondary mixing chamber. The bottom of the third pump is connected to the right side of the bottom of the secondary mixing chamber through a nozzle. An air inlet is connected to the end of the third pump away from the nozzle. A third flow valve is fixedly installed on the end of the air inlet away from the secondary mixing chamber.

[0010] Preferably, the top left side of the primary mixing tank is connected to an inlet, and a second flow valve is fixedly installed at the end of the inlet away from the primary mixing tank.

[0011] Preferably, the bottom end of the primary mixing tank near the liquid inlet is connected to a drain outlet.

[0012] Preferably, a geared motor is fixedly installed on the top left side of the interior of the primary mixing chamber, the output shaft of the geared motor is located on the bottom left side of the interior of the primary mixing chamber, and a second stirrer is fixedly installed on the bottom left side of the interior of the primary mixing chamber.

[0013] Preferably, a partition is provided between the water inlet pipe and the discharge pipe, and an overflow port is provided through the top of the partition.

[0014] Preferably, the top and bottom left sides of the water tank are connected to an inlet and an outlet, respectively, and the top and bottom right sides of the water tank are connected to a liquid level sensor and a temperature sensor, respectively.

[0015] Preferably, a filter is installed at one end of the water pump pipe inside the water tank, and the filter contains a ceramic filter membrane.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a carbon dioxide foaming device. In use, the foaming agent and water are fed into a primary mixing tank to mix and prepare the required liquid. Then the liquid is fed into a secondary mixing tank, and carbon dioxide is injected for secondary mixing to produce carbon dioxide foam. Then the fourth pump is started, and the fourth pump feeds the carbon dioxide foam prepared in the secondary mixing tank into a serpentine tube inside the water tank. At this time, the water inside the water tank absorbs the heat in the carbon dioxide foam inside the serpentine tube, cooling the carbon dioxide foam. In this way, the carbon dioxide foam has higher stability during oil displacement, reducing foam damage and disappearance.

[0017] Furthermore, when the foaming agent is mixed with water, the present invention starts a reduction motor, which drives a second stirrer to slowly stir the foaming agent and water. This slower and gentler stirring of the foaming agent and water reduces the introduction of gas and the generation of eddies, thereby reducing foam formation during mixing. When the prepared liquid enters the secondary mixing tank, a high-speed motor is started, which drives a first stirrer to rotate at high speed to stir the liquid and carbon dioxide. The needle stirrer consists of a series of long and sharp blades, shaped like needles, which can effectively cut and stir the liquid, accelerating foam formation and mixing.

[0018] Furthermore, when the temperature sensor detects an increase in the internal water temperature, the present invention injects clean water through the inlet to lower the water temperature. In conjunction with the liquid level sensor, it replenishes the water in a timely manner when the water level is low. Simultaneously injecting clean water can also lower the water temperature. This effectively utilizes the water in the tank for cooling, thereby achieving the purpose of energy saving. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall front view of a carbon dioxide foaming device according to the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of a carbon dioxide foaming device according to the present invention;

[0021] Figure 3 This is a schematic diagram of the primary mixing tank structure of a carbon dioxide foaming device according to the present invention;

[0022] Figure 4 This is a schematic diagram of the water tank structure of a carbon dioxide foaming device according to the present invention;

[0023] Figure 5 This is a schematic diagram of the secondary mixing tank structure of a carbon dioxide foaming device according to the present invention.

[0024] In the diagram: 1. Base; 2. Primary mixing tank; 3. Water tank; 4. Secondary mixing tank; 5. Chassis; 6. Fourth pump; 7. Serpentine pipe; 8. Discharge port; 9. Second pump; 10. Conveying pipe; 11. Electric valve; 12. Discharge pipe; 13. First pump; 14. Water inlet pipe; 15. First flow valve; 16. Pumping pipe; 17. High-speed motor; 18. First agitator; 19. Third pump; 20. Air inlet; 21. Liquid inlet; 22. Second flow valve; 23. Third flow valve; 24. Gear motor; 25. Second agitator; 26. Baffle plate; 27. Overflow port; 28. Water inlet; 29. ​​Water outlet; 30. Liquid level sensor; 31. Temperature sensor; 32. Filter; 33. Drain; 34. Spray pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Please see Figure 1-5 This invention provides a technical solution: a carbon dioxide foaming device, comprising a base 1, a primary mixing tank 2 fixedly installed on one side of the top of the base 1, a water tank 3 fixedly installed in the middle of the top of the base 1, a secondary mixing tank 4 fixedly installed on the top of the side of the base 1 away from the primary mixing tank 2 and the water tank 3, a machine housing 5 fixedly installed between the bottom ends of the water tank 3 and the secondary mixing tank 4, a fourth pump 6 fixedly installed inside the machine housing 5, a serpentine pipe 7 connecting the inside of the water tank 3, the two ends of the serpentine pipe 7 respectively connecting the fourth pump 6 and the discharge port 8, a second pump 9 fixedly installed on one side of the top of the water tank 3, the two ends of the second pump 9 respectively connecting the primary mixing tank 2 and the secondary mixing tank 4 through conveying pipes 10, the end of the conveying pipe 10 near the primary mixing tank 2 being fixed An electric valve 11 is installed, with the end of the electric valve 11 away from the conveying pipe 10 connected to a discharge pipe 12. The bottom end of the discharge pipe 12 is located inside the first-stage mixing tank 2 on the right side. When this device is in use, foaming agent and water are sent into the first-stage mixing tank 2 to mix and prepare the required liquid. Then the liquid is sent into the second-stage mixing tank 4, and carbon dioxide is injected for secondary mixing to produce carbon dioxide foam. Then the fourth pump 6 is started, and the fourth pump 6 inputs the carbon dioxide foam prepared in the second-stage mixing tank 4 into the serpentine tube 7 inside the water tank 3. At this time, the water inside the water tank 3 will absorb the heat in the carbon dioxide foam inside the serpentine tube 7 and cool the carbon dioxide foam. In this way, the carbon dioxide foam is more stable during oil displacement, reducing foam damage and disappearance.

[0033] like Figure 1 As shown, a first pump 13 is fixedly installed on the top right side of the first mixing tank 2. One end of the first pump 13 is connected to a water inlet pipe 14, and the bottom end of the water inlet pipe 14 is located in the middle of the first mixing tank 2. A first flow valve 15 is fixedly installed on the end of the first pump 13 away from the water inlet pipe 14. The end of the first flow valve 15 away from the water inlet pipe 14 is connected to a water tank 3 through a water suction pipe 16. A liquid inlet 21 is connected to the top left side of the first mixing tank 2. A second flow valve 22 is fixedly installed on the end of the liquid inlet 21 away from the first mixing tank 2. A third flow valve 23 is fixedly installed on the end of the air inlet 20 away from the second mixing tank 4. A third pump 19 is fixedly installed on the right side of the top of the inner side of the mixing chamber 4. The bottom of the third pump 19 is connected to the right side of the bottom of the inner side of the secondary mixing chamber 4 through the nozzle 34. The end of the third pump 19 away from the nozzle 34 is connected to the air inlet 20. During preparation, foaming agent is injected from the liquid inlet 21, carbon dioxide is injected from the air inlet 20, and water is drawn from the water pumping pipe 16. The flow rates of the three are controlled by the second flow valve 22, the third flow valve 23, and the first flow valve 15, respectively. In this way, it can be ensured that carbon dioxide and foaming agent can be mixed in a proper ratio to generate stable foam, while reducing resource waste.

[0034] like Figure 3 and Figure 5 As shown, a geared motor 24 is fixedly installed on the top left side inside the primary mixing tank 2. A second stirrer 25, a low-speed stirrer, is fixedly installed on the bottom left side inside the primary mixing tank 2, with its output shaft located therein. A motor 17, a high-speed motor, is fixedly installed in the middle of the top of the secondary mixing tank 4. A stirrer 18, a high-speed stirrer with a needle-type structure, is located on the bottom inside the secondary mixing tank 4, with its output shaft located therein. When the foaming agent is mixed with water, the geared motor is activated. 24. The geared motor 24 drives the second stirrer 25 to slowly stir the foaming agent and water. Stirring the foaming agent and water at a slower speed and in a gentler manner can reduce the introduction of gas and the generation of eddies, thereby reducing the formation of foam during mixing. When the prepared liquid enters the secondary mixing tank 4, the high-speed motor 17 is started. The high-speed motor 17 drives the first stirrer 18 to rotate at high speed to stir the liquid and carbon dioxide. The needle stirrer consists of a series of thin and sharp blades, which are shaped like needles. It can effectively cut and stir the liquid, accelerating the formation and mixing of foam.

[0035] like Figure 3 As shown, a partition 26 is provided between the inlet pipe 14 and the outlet pipe 12 in the primary mixing tank 2. An overflow port 27 is provided through the top of the partition 26. A drain port 33 is connected to the bottom of the primary mixing tank 2 near the liquid inlet 21. The partition 26 is provided on the right side inside the primary mixing tank 2. An overflow port 27 is provided at the top of the partition 26. In this way, the liquid sucked in by the outlet pipe 12 is prepared, but not just mixed. The left side of the primary mixing tank 2 is the preliminary mixing area, and the right side of the primary mixing tank 2 near the partition 26 is the prepared liquid after overflow. This can facilitate continuous preparation and transportation without conflict.

[0036] like Figure 4 As shown, the top and bottom left sides of water tank 3 are connected to an inlet 28 and an outlet 29, respectively. The top and bottom right sides of water tank 3 are connected to a level sensor 30 and a temperature sensor 31, respectively. When the temperature sensor 31 detects that the internal water temperature has risen, clean water is poured in through the inlet 28, which can lower the water temperature. In conjunction with the level sensor 30, water is replenished in time when the water level is low. At the same time, pouring in clean water can also lower the water temperature. This can effectively utilize the water in water tank 3 for cooling, thereby achieving the purpose of energy saving.

[0037] like Figure 3 As shown, a filter 32 is installed at one end of the water pipe 16 inside the water tank 3. The filter 32 is equipped with a ceramic filter membrane, which allows the clean water during mixing to be filtered, thus avoiding affecting the generation of foam later.

[0038] Working principle: During preparation, foaming agent is injected through inlet 21, carbon dioxide through inlet 20, and water is drawn through pumping pipe 16. The flow rates of these three components are controlled by the second flow valve 22, the third flow valve 23, and the first flow valve 15, respectively. The foaming agent and water are then fed into the primary mixing tank 2 for mixing to obtain the desired liquid. When the foaming agent and water are mixed, the reduction motor 24 is activated, driving the second stirrer 25 to slowly stir the foaming agent and water. This slow and gentle stirring reduces the introduction of gas and the generation of eddies, thus reducing foam formation during mixing. The liquid is then sent to the secondary mixing tank 4, where carbon dioxide is injected for secondary mixing. Carbon dioxide foam is produced. When the prepared liquid enters the secondary mixing tank 4, the high-speed motor 17 is started. The high-speed motor 17 drives the first agitator 18 to rotate at high speed to stir the liquid and carbon dioxide. The needle agitator consists of a series of thin and sharp blades, which are shaped like needles. It can effectively cut and stir the liquid, accelerate the formation and mixing of foam. Then the fourth pump 6 is started. The fourth pump 6 inputs the carbon dioxide foam prepared in the secondary mixing tank 4 into the serpentine tube 7 inside the water tank 3. At this time, the water inside the water tank 3 will absorb the heat of the carbon dioxide foam inside the serpentine tube 7 and cool the carbon dioxide foam. In this way, the carbon dioxide foam is more stable during oil displacement, reducing foam damage and disappearance.

[0039] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, guided by the specification, can make many other modifications without departing from the scope of the claims of the present invention, and all of these modifications are within the scope of protection of the present invention.

Claims

1. A carbon dioxide foaming device, characterized in that, The system includes a base (1), on which a primary mixing tank (2), a water tank (3), and a secondary mixing tank (4) are installed in sequence. A machine box (5) is provided between the water tank (3) and the secondary mixing tank (4). A fourth pump (6) is installed inside the machine box (5). A serpentine pipe (7) is connected inside the water tank (3). The two ends of the serpentine pipe are respectively connected to the fourth pump (6) and the discharge port (8) set on the side wall of the water tank (3). A second pump (9) is installed in the water tank (3). The two ends of the second pump (9) are respectively connected to the primary mixing tank (2), the water tank (3), and the secondary mixing tank (4) is connected to the primary mixing tank (4) through a conveying pipe (10). The mixing tank (2) and the secondary mixing tank (4) are connected by an electric valve (11) at one end of the conveying pipe (10) near the primary mixing tank (2) and a discharge pipe (12) at the other end of the electric valve (11). A first pump (13) is installed at the top inside the primary mixing tank (2). One end of the first pump (13) is connected to a water inlet pipe (14). A first flow valve (15) is installed at the end of the first pump (13) away from the water inlet pipe (14). The end of the first flow valve (15) away from the water inlet pipe (14) is connected to a water tank (3) through a water pumping pipe (16).

2. The carbon dioxide foaming equipment according to claim 1, characterized in that, A motor (17) is fixedly installed at the top center of the secondary mixing tank (4). The output shaft of the motor (17) is located at the bottom of the interior of the secondary mixing tank (4). A first stirrer (18) is also provided at the bottom of the interior of the headphone mixer (4).

3. The carbon dioxide foaming equipment according to claim 1, characterized in that, The first stirrer (18) has a needle-type structure.

4. The carbon dioxide foaming equipment according to claim 1, characterized in that, A third pump (19) is fixedly installed on the right side of the top of the secondary mixing box (4). The bottom of the third pump (19) is connected to the right side of the bottom of the secondary mixing box through a nozzle (34). An air inlet (20) is connected to the end of the third pump (19) away from the nozzle (34). A third flow valve (23) is fixedly installed on the end of the air inlet (20) away from the secondary mixing box (4).

5. A carbon dioxide foaming device according to claim 1, characterized in that, The top left side of the primary mixing tank (2) is connected to an inlet (21), and a second flow valve (22) is fixedly installed at the end of the inlet (21) away from the primary mixing tank (2).

6. A carbon dioxide foaming device according to claim 1, characterized in that, The bottom of the primary mixing tank (2) near the liquid inlet (21) is connected to a drain outlet (33).

7. A carbon dioxide foaming device according to claim 1, characterized in that, A geared motor (24) is fixedly installed on the left side of the top of the first-stage mixing tank (2). The output shaft of the geared motor (24) is located on the left side of the bottom of the first-stage mixing tank (2). A second stirrer (25) is fixedly installed on the left side of the bottom of the first-stage mixing tank (2).

8. A carbon dioxide foaming device according to claim 1, characterized in that, A partition (26) is provided between the water inlet pipe (14) and the discharge pipe (12), and an overflow port (27) is provided at the top of the partition (26).

9. A carbon dioxide foaming device according to claim 1, characterized in that, The top and bottom left sides of the water tank (3) are connected to an inlet (28) and an outlet (29), respectively. The top and bottom right sides of the water tank (3) are connected to a liquid level sensor (30) and a temperature sensor (31), respectively.

10. A carbon dioxide foaming device according to claim 1, characterized in that, The water pump (16) is located inside the water tank (3) and a filter (32) is installed at one end. The filter (32) is equipped with a ceramic filter membrane.

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