Gas-liquid separation device for carbon dioxide flooding produced liquid

Abstract

The utility model relates to the technical field of oil field oil extraction, in particular to a gas-liquid separation device for carbon dioxide flooding produced liquid. The gas-liquid separation device for the carbon dioxide flooding produced liquid comprises a treatment tank, two separation sheets are erected in the treatment tank, and a separation plate is erected between the two separation sheets; and communicating covers which are rotationally connected are arranged on the two sides of the partition plates in the two partition pieces, a plurality of communicating thin pipes are erected between the two communicating covers on the same side, supporting rings are arranged outside the thin pipes, and blades are arranged outside the supporting rings. According to the gas-liquid separation device for the carbon dioxide flooding produced liquid, provided by the utility model, through the rotating arrangement of the thin pipe, when the cooling liquid is injected in the use process, the driving force of the flowing of the cooling liquid can drive the thin pipe to rotate, so that the contact between the thin pipe and the flowing cooling liquid is more sufficient, and the cooling uniformity is improved; therefore, the gas-liquid separation effect of oil liquid in the thin pipe can be improved in an auxiliary mode.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field production, in particular to a gas-liquid separation device for carbon dioxide driven produced liquid. Background Art

[0002] The gas-liquid separation device of the carbon dioxide driven produced liquid mainly achieves separation based on the density difference between the gas and liquid phases. The density of carbon dioxide gas is relatively small, while the density of the produced liquid (mainly a mixed liquid of oil and water) is relatively large. Under the action of gravity, the gas moves upward and the liquid settles downward, thereby achieving the purpose of separation. The existing Chinese patent announcement number is CN217246947U, which is a gas-liquid separation device for an oil field carbon dioxide injection and oil production surface device. It can be seen from the contents recorded in its specification that the capillary in the device is directly connected and fixed. In later use, after the coolant is injected, the coolant will flow out directly. The contact area between the coolant and the capillary is relatively small, and the contact area of ​​the coolant is relatively low, thereby reducing the heat exchange effect to a certain extent.

[0003] Therefore, it is necessary to provide a new gas-liquid separation device for carbon dioxide driven produced liquid to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a gas-liquid separation device for carbon dioxide driven produced liquid.

[0005] The gas-liquid separation device for carbon dioxide driven produced liquid provided by the utility model comprises: a processing tank, two partitions are arranged inside the processing tank, and a partition plate is arranged between the two partitions;

[0006] A rotatably connected connecting cover is provided on both sides of the internal dividing plates of the two dividing sheets, and a number of connecting capillaries are arranged between the two connecting caps on the same side. A supporting ring is provided on the outside of the capillaries, and blades are provided on the outside of the supporting ring. A fixedly connected supporting frame is provided at the bottom of the supporting ring, and the supporting frame is fixedly connected to the top of the connecting cover below.

[0007] Preferably, a communicating liquid inlet pipe is provided inside the processing tank, and an inclined liquid discharge port is provided at the end of the liquid inlet pipe, and the position of the liquid discharge port is opposite to the position of the blade.

[0008] Preferably, an oil inlet pipe is provided on one side of the bottom partition plate in the processing tank, and an oil outlet pipe is provided on the other side of the bottom partition plate in the processing tank, and the ends of the oil inlet pipe and the oil outlet pipe are respectively connected to the corresponding connecting covers and are rotatably connected.

[0009] Preferably, a communicating exhaust pipe is provided at the inner top of the processing tank, and a solenoid valve is provided on the exhaust pipe.

[0010] Preferably, a floating plate slidably connected is provided between the top of the processing tank and the upper partition plate, a through hole is opened inside the floating plate, and a fixedly connected plug rod is provided on the top of the floating plate.

[0011] Preferably, a guide plate and a mounting frame which are fixedly connected are arranged inside the exhaust pipe, the inside of the guide plate abuts against and is slidably connected to the outer wall of the insertion rod, and a switch is arranged at the bottom of the mounting frame.

[0012] Preferably, a connecting pipe is provided inside the upper partition plate, and both ends of the connecting pipe are respectively connected to the spaces on both sides of the partition plate. A connecting drain pipe is provided outside the connecting pipe, and the end of the drain pipe extends outside the processing tank.

[0013] Compared with the related art, the gas-liquid separation device for carbon dioxide flooding produced liquid provided by the utility model has the following beneficial effects:

[0014] 1. The utility model has a rotating arrangement of the capillary tube. When the coolant is injected during use, the driving force of the coolant flow can drive the capillary tube to rotate, so that the contact between the capillary tube and the flowing coolant is more sufficient to improve the cooling uniformity, thereby helping to improve the gas-liquid separation effect of the oil in the capillary tube.

[0015] 2. When the utility model is in use, when the oil gathers above the upper partition, the floating plate can float upward by its own buoyancy, so that the connection between the exhaust pipe and the treatment tank can be sealed once, and in this process, the rod on the floating plate presses the switch, so that the valve on the exhaust pipe can be closed, the exhaust pipe can be sealed twice, and a signal is sent to the external terminal to reduce the injection speed of crude oil, thereby reducing the probability of crude oil overflowing from the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of a gas-liquid separation device for producing liquid from carbon dioxide drive provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure of a treatment tank shown;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the separator and its components shown;

[0019] Figure 4 for Figure 1 A schematic diagram of the structure of the support ring and its components shown;

[0020] Figure 5 for Figure 1 Schematic diagram of the orientation structure of the floating plate and its components.

[0021] Numbers in the figure: 1. treatment tank; 11. oil inlet pipe; 12. oil outlet pipe; 13. exhaust pipe; 14. solenoid valve; 2. liquid inlet pipe; 21. liquid discharge port; 3. separator; 31. separator plate; 32. connecting pipe; 33. liquid discharge pipe; 4. capillary; 41. connecting cover; 5. support ring; 51. blade; 52. support frame; 6. floating plate; 61. through hole; 62. plug rod; 63. guide plate; 7. mounting frame; 71. switch. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] See also Figures 1 to 5 The utility model provides a gas-liquid separation device for carbon dioxide driven produced liquid, and the gas-liquid separation device for carbon dioxide driven produced liquid includes: a processing tank 1, two partitions 3 are set inside the processing tank 1, and a partition plate 31 is set between the two partitions 3.

[0025] In the embodiments of the present invention, please refer to Figures 1 to 5 A rotatably connected connecting cover 41 is provided on both sides of the internal dividing plates 31 of the two dividing sheets 3, and a plurality of connected capillaries 4 are arranged between the two connecting covers 41 on the same side. A supporting ring 5 is arranged outside the capillaries 4, and a blade 51 is arranged outside the supporting ring 5. A fixedly connected supporting frame 52 is provided at the bottom of the supporting ring 5, and the supporting frame 52 is fixedly connected to the top of the connecting cover 41 below. A connected liquid inlet pipe 2 is provided inside the processing tank 1, and an inclined liquid discharge port 21 is provided at the end of the liquid inlet pipe 2, and the position of the liquid discharge port 21 is opposite to the position of the blade 51.

[0026] It should be noted that: through the inclined discharge port 21, when the coolant is injected through the liquid inlet pipe 2, the coolant flowing out of the discharge port 21 can impact the external blades 51, so that the blades 51 can drive the support ring 5 and the connecting cover 41 thereunder to rotate, and then drive the capillary 4 to rotate synchronously. Through the rotation of the capillary 4, the mixing effect of the external coolant can be increased, so that the outer wall of the capillary 4 can be cooled more evenly, and the relatively high temperature of the coolant after heat exchange on the outer wall of the capillary 4 is reduced. The coolant is always outside the capillary 4, and the influence on the overall heat exchange of the capillary 4 can be reduced, thereby improving the separation effect of the device on carbon dioxide expelling from crude oil.

[0027] In the embodiments of the present invention, please refer to Figures 1 to 5 An oil inlet pipe 11 is provided on one side of the bottom partition plate 31 in the processing tank 1, and an oil outlet pipe 12 is provided on the other side of the bottom partition plate 31 in the processing tank 1. The ends of the oil inlet pipe 11 and the oil outlet pipe 12 are respectively connected to the corresponding connecting cover 41 and are rotatably connected.

[0028] It should be noted that: through the setting of the oil inlet pipe 11 and the oil outlet pipe 12, when the crude oil is injected from the oil inlet pipe 11 into the capillary tube 4 on one side of the partition plate 31, so that it flows into the capillary tube 4 on the other side and flows outward through the oil outlet pipe 12, the circulation of the crude oil can be realized. In this process, the crude oil in the capillary tube 4 can be heat exchanged by wrapping it with the coolant outside the capillary tube 4, thereby realizing the separation of carbon dioxide in the crude oil.

[0029] In the embodiments of the present invention, please refer to Figures 1 to 5 A connected exhaust pipe 13 is provided at the inner top of the processing tank 1, and a solenoid valve 14 is provided on the exhaust pipe 13. A slidingly connected floating plate 6 is provided between the inner top of the processing tank 1 and the upper partition plate 3. A through hole 61 is provided inside the floating plate 6, and a fixedly connected plug rod 62 is provided on the top of the floating plate 6. A fixedly connected guide plate 63 and a mounting frame 7 are arranged inside the exhaust pipe 13. The inner part of the guide plate 63 abuts against and is slidably connected to the outer wall of the plug rod 62, and a switch 71 is provided at the bottom of the mounting frame 7.

[0030] It should be noted that: by opening a through hole 61 inside the floating plate 6, the through hole 61 can allow the carbon dioxide gas separated by heat exchange to pass through the floating plate 6 and flow into the exhaust pipe 13 and be discharged outward. When there is too much crude oil inside the separation tank formed between the upper partition plate 3 and the processing tank 1, the crude oil can push the floating plate 6 upward. When the top of the floating plate 6 is against the inner top of the processing tank 1, the exhaust pipe 13 can be sealed once. In this process, the plug rod 62 located on the floating plate 6 can squeeze the switch 71, so that the switch 71 can send a signal to the external terminal controller, so that the controller closes the solenoid valve 14 on the exhaust pipe 13, thereby realizing a secondary sealing of the exhaust pipe 13, thereby improving the sealing effect of the exhaust pipe 13 and reducing the phenomenon of crude oil overflowing from the exhaust pipe 13.

[0031] In the embodiments of the present invention, please refer to Figures 1 to 5 A connecting pipe 32 is provided inside the upper partition plate 3, and both ends of the connecting pipe 32 are respectively connected to the spaces on both sides of the partition plate 31. A connecting drain pipe 33 is provided outside the connecting pipe 32, and the end of the drain pipe 33 extends to the outside of the processing tank 1.

[0032] It should be noted that: by setting the connecting pipe 32, when the coolant is injected, when the spaces on both sides of the partition plate 31 are filled with the coolant, the coolant in the spaces on both sides can flow into the inside of the drain pipe 33 through the connecting pipe 32, so that the coolant can circulate;

[0033] By setting the partition plate 31, the capillary tubes 4 on both sides can be placed in independent spaces, and when the coolant is injected, the capillary tubes 4 on both sides can be wrapped by the coolant with a lower temperature, so that the crude oil in the oil discharge capillary tubes 4 can be subjected to secondary heat exchange, thereby helping to improve the gas-liquid separation effect.

[0034] The working principle of the gas-liquid separation device for carbon dioxide flooding produced liquid provided by the utility model is as follows;

[0035] When the device is used, crude oil can be injected into the capillary tube 4 inside the processing tank 1 through the oil inlet pipe 11, and during this process, coolant can also be injected into the processing tank 1 through the liquid inlet pipe 2. When the coolant flows into the processing tank 1 through the liquid discharge port 21, the flowing coolant can impact the blades 51 on the outer wall of the support ring 5, thereby driving the support ring 5 to rotate.

[0036] At this time, the rotating support ring 5 can drive the connecting cover 41 to rotate through the support frame 52, and the rotating connecting cover 41 can drive the multiple capillaries 4 connected inside to rotate, thereby increasing the contact flexibility between the outer wall of the capillaries 4 and the coolant flowing in the processing tank 1, increasing the contact area between the capillaries 4 and the coolant, thereby improving the cooling uniformity of the capillaries 4, making the crude oil in the capillaries 4 heat exchanged, and then discharging the carbon dioxide gas compatible with the crude oil, and then achieving separation in the separation tank formed between the upper partition plate 3 and the processing tank 1 and discharging it to the outside through the exhaust pipe 13;

[0037] When there is too much crude oil in the separation tank, the floating plate 6 can be pushed up. When the top of the floating plate 6 abuts against the inner top of the processing tank 1, the exhaust pipe 13 can be sealed once. In this process, the plug 62 on the floating plate 6 can squeeze the switch 71, so that the switch 71 can send a signal to the external terminal controller, so that the controller closes the solenoid valve 14 on the exhaust pipe 13, thereby realizing the secondary sealing of the exhaust pipe 13, thereby improving the sealing effect of the exhaust pipe 13 and reducing the phenomenon of crude oil overflowing from the exhaust pipe 13.

[0038] During the injection of the coolant, when the two partitions 3 in the processing tank 1 are filled with the coolant, the coolant can be discharged to the outside through the connecting pipe 32 and the drain pipe 33 to circulate the coolant.

[0039] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0040] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gas-liquid separation device for carbon dioxide flooding produced liquid, characterized in that: include: A processing tank (1), wherein two partition sheets (3) are arranged inside the processing tank (1), and a partition plate (31) is arranged between the two partition sheets (3); Both sides of the internal partition plates (31) of the two partition sheets (3) are provided with rotatably connected connecting covers (41), a plurality of connected capillaries (4) are arranged between the two connecting covers (41) on the same side, a support ring (5) is arranged outside the capillaries (4), and blades (51) are arranged outside the support ring (5), a fixedly connected support frame (52) is arranged at the bottom of the support ring (5), and the support frame (52) is fixedly connected to the top of the connecting cover (41) below.

2. The gas-liquid separation device for carbon dioxide flooding produced liquid according to claim 1, characterized in that: A communicating liquid inlet pipe (2) is provided inside the treatment tank (1), and an inclined liquid discharge port (21) is provided at the end of the liquid inlet pipe (2), and the position of the liquid discharge port (21) is opposite to the position of the blade (51).

3. The gas-liquid separation device for carbon dioxide flooding produced liquid according to claim 1, characterized in that: An oil inlet pipe (11) is provided on one side of the bottom partition plate (31) in the processing tank (1), and an oil outlet pipe (12) is provided on the other side of the bottom partition plate (31) in the processing tank (1), and the ends of the oil inlet pipe (11) and the oil outlet pipe (12) are respectively connected to corresponding connecting covers (41) and are rotatably connected.

4. The gas-liquid separation device for carbon dioxide flooding produced liquid according to claim 1, characterized in that: A communicating exhaust pipe (13) is provided at the inner top of the processing tank (1), and a solenoid valve (14) is provided on the exhaust pipe (13).

5. The gas-liquid separation device for carbon dioxide flooding produced liquid according to claim 4, characterized in that: A floating plate (6) is provided in sliding connection between the top of the processing tank (1) and the upper partition plate (3), a through hole (61) is provided inside the floating plate (6), and a fixedly connected plug rod (62) is provided on the top of the floating plate (6).

6. The gas-liquid separation device for carbon dioxide flooding produced liquid according to claim 5, characterized in that: A guide plate (63) and a mounting frame (7) are fixedly connected inside the exhaust pipe (13); the inside of the guide plate (63) abuts against and is slidably connected to the outer wall of the insertion rod (62); and a switch (71) is provided at the bottom of the mounting frame (7).

7. The gas-liquid separation device for carbon dioxide flooding produced liquid according to claim 1, characterized in that: A connecting pipe (32) is provided inside the upper partition sheet (3), and both ends of the connecting pipe (32) are respectively connected to the spaces on both sides of the partition plate (31), and a connecting drain pipe (33) is provided outside the connecting pipe (32), and the end of the drain pipe (33) extends to the outside of the processing tank (1).

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