A device for carbon dioxide displacement oil and gas drive sealing in a coal gas coexisting area

Abstract

The present application relates to the technical field of carbon dioxide flooding, and discloses a carbon dioxide flooding, gas displacement and storage device for coal-gas symbiotic areas, which comprises a base, a gas injection assembly arranged above the base, a storage tank fixedly arranged on the top of the base, an air inlet end of the gas injection assembly being in communication with the inside of the storage tank, a conveying pipe arranged above the base, an air outlet end of the gas injection assembly being in communication with the inside of the conveying pipe, and a position adjusting assembly arranged above the base, an output end of the position adjusting assembly being connected with the conveying pipe. In use, the device is first moved to a designated position through the base, the gas injection assembly can pump the carbon dioxide in the storage tank into the conveying pipe, the conveying pipe discharges the carbon dioxide into the ground, and oil-type gas, methane and coal-bed gas can all be pumped to the ground. The position adjusting assembly can drive the conveying pipe to move in the vertical direction, the conveying pipe can arbitrarily change its position in the vertical direction, automatically move upward again, and discharge the carbon dioxide at a specific and accurate position.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide flooding technology, specifically to a carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone. Background Technology

[0002] Carbon dioxide enhanced oil recovery (COR) technology involves injecting carbon dioxide underground to drive the flow of oil, oil-type gas, and coalbed methane, thereby improving oilfield recovery rates. Existing technologies utilize COR injection devices to continuously inject carbon dioxide underground, improving the efficiency of continuous carbon dioxide gas supply. For example, Chinese invention patent application number CN201811267136.3 provides a COR injection device for COR. In this device, a second gas guide tube slides within a first gas guide tube. The second gas guide tube is first inserted into the oil and gas well. Then, by moving a piston left and right, carbon dioxide is first discharged into the first and second gas guide tubes, and then discharged into the oil and gas well.

[0003] However, this device has shortcomings. The first gas delivery tube is fixedly connected to the stationary column, preventing it from moving vertically. Furthermore, the second gas delivery tube is not connected to any adjustable drive mechanism. This means that once the second gas delivery tube slides downwards, it cannot automatically move upwards again. Therefore, the second gas delivery tube cannot arbitrarily change its vertical position underground, and cannot achieve precise carbon dioxide emission from a specific location. Summary of the Invention

[0004] The purpose of this invention is to provide a carbon dioxide oil and gas recovery and storage device for a coal-oil-gas symbiotic zone. The adjustment component can drive the conveying pipe to move vertically, and the conveying pipe can arbitrarily change its position in the vertical direction and automatically move upward again to achieve the discharge of carbon dioxide at a specific and precise position.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a carbon dioxide-driven oil and gas storage device for a coal-oil-gas symbiotic zone, comprising: a base; an injection assembly disposed above the base; a storage tank fixedly disposed on the top of the base, wherein the inlet end of the injection assembly is connected to the interior of the storage tank; a delivery pipe disposed above the base, wherein the outlet end of the injection assembly is connected to the interior of the delivery pipe; and a positioning assembly disposed above the base, wherein the output end of the positioning assembly is connected to the delivery pipe for driving the delivery pipe to move vertically.

[0006] Preferably, the positioning assembly includes: a limiting frame, fixedly disposed on the top of the base, the limiting frame having a sliding groove on the side wall away from the conveying pipe and an clearance groove on the side wall facing the conveying pipe, the clearance groove communicating with the sliding groove, the length of the limiting frame being greater than the length of the conveying pipe, and the conveying pipe being able to slide along the side wall of the limiting frame; a positioning plate, the positioning plate being disposed in the sliding groove and being able to slide along the sliding groove, the length of the positioning plate being greater than the length of the limiting frame, and the bottom of the positioning plate facing the conveying pipe being connected to the conveying pipe; and a first driver, fixedly disposed on the top of the base, the output end of the first driver being connected to the positioning plate for driving the positioning plate to move vertically.

[0007] Preferably, the gas injection assembly includes: a gas injection box, fixedly disposed on the top of the base; a gas-driving plate, disposed inside the gas injection box and slidable along the inner wall of the gas injection box, the gas-driving plate dividing the interior of the gas injection box into a first gas guiding chamber and a second gas guiding chamber, both of which communicate with the interior of the storage tank; a first electric telescopic rod, disposed below the gas injection box, the output end of the first electric telescopic rod extending into the gas injection box and fixedly connected to the gas-driving plate; and a gas delivery assembly, the gas delivery assembly including a first gas delivery pipe, the top of the first gas delivery pipe disposed outside the delivery pipe and fixedly connected to the top of the limiting frame, a gap existing between the first gas delivery pipe and the clearance groove, the bottom of the first gas delivery pipe extending into the delivery pipe, and the interiors of the first gas guiding chamber, the second gas guiding chamber, and the delivery pipe all communicating with the interior of the first gas delivery pipe.

[0008] Preferably, the air supply assembly further includes a second air supply pipe and an isolation plate. The length of the first air supply pipe is the same as the length of the delivery pipe. The second air supply pipe and the isolation plate are respectively fixedly disposed at the top and bottom of the first air supply pipe. The first air guide cavity and the second air guide cavity are both connected to the interior of the first air supply pipe through the second air supply pipe. The isolation plate can slide along the inner wall of the delivery pipe. The bottom surface of the isolation plate is provided with an exhaust cavity, which is connected to the interior of the first air supply pipe.

[0009] Preferably, the gas injection assembly further includes a bidirectional gas guiding assembly, which includes: a first gas guiding pipe disposed between the gas injection box and the storage tank, with a first end of the first gas guiding pipe communicating with the interior of the storage tank; a second gas guiding pipe disposed between the gas injection box and the first gas guiding pipe, with a first end of the second gas guiding pipe communicating with a second end of the first gas guiding pipe, the second end of the first gas guiding pipe having a first one-way valve, the second end of the second gas guiding pipe being fixedly disposed on the top surface of the gas injection box and communicating with the first gas guiding cavity, the second end of the second gas guiding pipe having a second one-way valve; and a third gas guiding pipe, with a first end of the third gas guiding pipe being fixedly disposed on the top surface of the gas injection box and communicating with the first gas guiding cavity, the first end of the third gas guiding pipe having a third one-way valve, the second end of the third gas guiding pipe communicating with the first end of the second gas delivery pipe, and the second end of the second gas delivery pipe communicating with the interior of the first gas delivery pipe.

[0010] Preferably, the bidirectional gas guide assembly further includes: a fourth gas guide pipe disposed between the gas injection box and the first gas guide pipe, the first end of the fourth gas guide pipe communicating with the middle of the first gas guide pipe, the second end of the fourth gas guide pipe being fixedly disposed on the bottom surface of the gas injection box and communicating with the second gas guide cavity, and the two ends of the fourth gas guide pipe being respectively provided with a fourth one-way valve and a fifth one-way valve; and a fifth gas guide pipe disposed on the side of the gas injection box away from the first gas guide pipe, the first end of the fifth gas guide pipe being fixedly disposed on the bottom surface of the gas injection box and communicating with the second gas guide cavity, the second end of the fifth gas guide pipe communicating with the middle of the third gas guide pipe, and the two ends of the fifth gas guide pipe being respectively provided with a sixth one-way valve and a seventh one-way valve.

[0011] Preferably, the first driver includes: a metal plate fixedly disposed on the side wall of the limiting frame; a magnetic plate fixedly disposed on the side wall of the adjusting plate; a rack fixedly disposed on the side wall of the adjusting plate away from the conveying pipe, the length of the rack being the same as the length of the adjusting plate; and a motor fixedly disposed on the top of the base, the output end of the motor being fixedly connected to a gear, the gear meshing with the rack for transmission.

[0012] Preferably, the first air supply pipe is provided with an avoidance channel, the avoidance channel penetrates the side wall of the first air supply pipe, the depth extension direction of the avoidance channel is the same as the depth extension direction of the avoidance groove, the avoidance channel is not connected to the interior of the first air supply pipe, the adjustment component further includes a locking component, the locking component is disposed inside the avoidance channel, and the adjustment plate is connected to the delivery pipe through the locking component.

[0013] Preferably, the locking assembly includes: a plug-in plate, wherein the adjusting plate has an assembly cavity inside, the top of the assembly cavity penetrates the side wall of the adjusting plate facing the clearance groove, the plug-in plate is disposed in the assembly cavity and can slide along the inner wall of the assembly cavity; a plug-in post, wherein the side wall of the adjusting plate has a first insertion hole, the first end of the plug-in post is fixedly connected to the side wall of the plug-in plate facing the clearance groove, the second end of the plug-in post extends into the first insertion hole and can slide along the inner wall of the first insertion hole, the length of the plug-in post is greater than the depth of the first insertion hole, the depth of the assembly cavity is greater than the sum of the thickness of the plug-in plate and the length of the plug-in post, the outer surface of the conveying pipe has a second insertion hole, the second insertion hole being positioned corresponding to the first insertion hole; and a second driver, disposed at the top of the conveying pipe, the output end of the second driver passing through the clearance channel and connected to the top of the plug-in plate, the second driver being used to drive the plug-in plate to move horizontally.

[0014] Preferably, there are multiple plug-in posts, first sockets, and second sockets, and they are evenly spaced from top to bottom; the second driver includes: a connecting plate, disposed on the top of the conveying pipe and detachably connected to the conveying pipe; and a second electric telescopic rod, fixedly disposed on the side wall of the connecting plate facing the clearance channel, the output end of the second electric telescopic rod extending into the assembly cavity and fixedly connected to the plug-in plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (i) This invention includes a base, an injection assembly, a storage tank, a delivery pipe, and a positioning assembly. In use, the injection assembly draws carbon dioxide from the storage tank into the delivery pipe, which then discharges the carbon dioxide into the ground. The positioning assembly drives the delivery pipe to move vertically, allowing the pipe to arbitrarily change its vertical position and automatically move upwards again, thus discharging carbon dioxide at a precise location.

[0017] (ii) In this invention, the gas injection assembly also includes a bidirectional gas guide assembly. The bidirectional gas guide assembly can ensure that no matter which direction the gas drive plate moves, the carbon dioxide in the gas injection box can continuously enter the second gas delivery pipe through the third gas guide pipe, and the carbon dioxide on both sides of the gas drive plate will not affect the movement of the gas drive plate.

[0018] (iii) In this invention, the adjustment assembly further includes a locking assembly located inside the clearance channel. The locking assembly enables the adjustment plate and the delivery pipe to enter a locked state or a separated state, thereby allowing the adjustment plate and the delivery pipe to move together, or to remove the delivery pipe from the adjustment assembly. Attached Figure Description

[0019] Figure 1 This is an isometric view of the present invention;

[0020] Figure 2 This is a front sectional view of the present invention;

[0021] Figure 3 This is an isometric view of the base and storage tank in this invention;

[0022] Figure 4 This is an isometric view of the gas injection assembly in this invention;

[0023] Figure 5 This is an isometric sectional view of the gas injection box in this invention;

[0024] Figure 6 This is an isometric view of the air delivery component in this invention;

[0025] Figure 7 This is an isometric sectional view of the first air delivery pipe in this invention;

[0026] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0027] Figure 9 This is an isometric view of the isolation disk in this invention;

[0028] Figure 10 This is an isometric view of the bidirectional airflow assembly in this invention;

[0029] Figure 11 This is a front sectional view of the first air duct in this invention;

[0030] Figure 12 This is a front sectional view of the second air guide tube in this invention;

[0031] Figure 13 This is a front sectional view of the third and fifth air guide tubes in this invention;

[0032] Figure 14 This is a front sectional view of the fourth air duct in this invention;

[0033] Figure 15 This is an isometric view of the conveying pipe in this invention;

[0034] Figure 16 for Figure 15 Enlarged view of point B in the middle;

[0035] Figure 17 This is an isometric view of the positioning component in this invention;

[0036] Figure 18 This is an isometric view of the limiting frame in this invention;

[0037] Figure 19 for Figure 18 Enlarged view of point C in the middle;

[0038] Figure 20 This is an isometric view of the adjustment plate in this invention;

[0039] Figure 21 for Figure 20 Enlarged view of point D in the middle;

[0040] Figure 22 This is an isometric view of the first driver in this invention;

[0041] Figure 23 This is an isometric view of the locking component in this invention;

[0042] Figure 24 for Figure 23 Enlarged view of point E in the middle.

[0043] The reference numerals in the figures include:

[0044] 1-Base, 2-Injection assembly, 21-Injection box, 211-First air guide chamber, 212-Second air guide chamber, 22-Air drive plate, 23-First electric telescopic rod, 24-Air supply assembly, 241-First air supply pipe, 2411-Avoidance passage, 242-Second air supply pipe, 243-Isolation plate, 2431-Exhaust chamber, 25-Bidirectional air guide assembly, 251-First air guide pipe, 2511-First one-way valve, 252-Second air guide pipe, 2521-Second one-way valve, 253-Third air guide pipe, 2531-Third one-way valve, 254-Fourth air guide pipe, 2541-Fourth one-way valve, 2542-Second one-way valve, 2542-Second one-way valve, 253-Third air guide pipe, 2531-Third one-way valve, 254-Fourth one-way valve, 2542-Second one-way valve, 2543-Second one-way valve, 2544-Second one-way valve, 2545-Second one-way valve, 2541-Second ... 5-One-way valve, 255-Fifth air guide pipe, 2551-Sixth one-way valve, 2552-Seventh one-way valve, 3-Storage tank, 4-Transfer pipe, 41-Second insertion hole, 5-Adjustment assembly, 51-Limit bracket, 511-Slide groove, 512-Allowing groove, 52-Adjustment plate, 521-Assembly cavity, 522-First insertion hole, 53-First driver, 531-Metal plate, 532-Magnetic plate, 533-Rack, 534-Motor, 535-Gear, 54-Locking assembly, 541-Plug-in plate, 542-Plug-in post, 543-Second driver, 5431-Connecting plate, 5432-Second electric telescopic rod. Detailed Implementation

[0045] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0046] Please see Figure 1-24 This invention provides a technical solution: a carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone, comprising a base 1, an injection assembly 2, a storage tank 3, a delivery pipe 4, and a positioning assembly 5. In this embodiment, casters are installed at the bottom of the base 1 to facilitate moving the invention to a designated location. A drilling mechanism and a storage mechanism (not shown in the figure) can also be installed on the base 1 to facilitate surface drilling and subsequent carbon dioxide storage operations. After surface drilling is completed, oil, oil-type gas, and coalbed methane are extracted first. When the extraction rate and oil recovery rate decrease, the positioning assembly 5 drives the delivery pipe 4 to move vertically downwards. The injection assembly 2 pumps carbon dioxide from the storage tank 3 into the delivery pipe 4, and the delivery pipe 4 discharges the carbon dioxide underground through a conical gas nozzle at the bottom. The underground coal seam is located above sandstone and shale layers, and there are fractures between the coal seam and the shale layers. After carbon dioxide is released underground, oil-type gas, methane, and other gas molecules can enter the roadways and goaf areas of the coal seam through fractures, and then flow into the tunneling face. Oil-type gas, methane, and coalbed methane can all be pumped to the surface. This operation can displace methane from the coal seam, reducing gas accidents, and also drive the flow of oil and oil-type gas, improving the oil and gas recovery rate. After extraction and coal mining are completed, carbon dioxide can be sealed in the closed space left after coal seam mining and in the oil reservoir. In use, the delivery pipe 4 can arbitrarily change its vertical position and automatically move upwards again, achieving precise carbon dioxide discharge at a specific location.

[0047] Please see Figure 1-8 The gas injection assembly 2 includes a gas injection box 21, a gas-driving plate 22, a first electric telescopic rod 23, and a gas delivery assembly 24. The gas-driving plate 22 divides the interior of the gas injection box 21 into a first gas guide chamber 211 and a second gas guide chamber 212. The gas delivery assembly 24 includes a first gas delivery pipe 241, the bottom of which extends into the delivery pipe 4. The output end of the first electric telescopic rod 23 can drive the gas-driving plate 22 to move up or down along the inner wall of the gas injection box 21 by extending and shortening. When the gas-driving plate 22 moves upward, the carbon dioxide in the storage tank 3 is drawn into the second gas guide chamber 212, and the gas in the first gas guide chamber 211 is drawn into the first gas delivery pipe 241 and finally discharged into the delivery pipe 4. When the gas-expelling plate 22 moves downward, the carbon dioxide in the storage tank 3 is pumped into the first gas-guiding chamber 211, and the gas in the second gas-guiding chamber 212 is pumped into the first gas delivery pipe 241, and finally discharged into the delivery pipe 4. Therefore, no matter which direction the gas-expelling plate 22 moves, the carbon dioxide in the gas injection box 21 can continuously enter the delivery pipe 4 and be discharged into the ground through the conical gas nozzle, ensuring a stable and orderly injection of carbon dioxide and improving the continuous supply efficiency of carbon dioxide.

[0048] Please see Figure 1-9The gas delivery assembly 24 also includes a second gas delivery pipe 242 and an isolation plate 243. The bottom surface of the isolation plate 243 has an exhaust chamber 2431. When the gas drive plate 22 reciprocates, carbon dioxide from the first and second gas guide chambers 211 and 212 is first discharged into the second gas delivery pipe 242, then through the second gas delivery pipe 242 into the first gas delivery pipe 241, then through the first gas delivery pipe 241 into the exhaust chamber 2431, and finally into the delivery pipe 4. When the delivery pipe 4 is not underground, the isolation plate 243 is located at the bottom of the inner side of the delivery pipe 4. When the delivery pipe 4 moves downwards and extends underground, the isolation plate 243 slides along the inner wall of the delivery pipe 4. Therefore, regardless of the location of the delivery pipe 4 after its bottom is underground, the carbon dioxide entering the delivery pipe 4 through the exhaust chamber 2431 can only fill the area below the isolation plate 243 within the delivery pipe 4; carbon dioxide cannot enter the area above the isolation plate 243 within the delivery pipe 4, thus avoiding waste of carbon dioxide.

[0049] Please see Figure 1-9 and Figure 17-22 The positioning assembly 5 includes a limiting frame 51, a positioning plate 52, and a first driver 53. The first driver 53 can drive the positioning plate 52 to move vertically. The bottom of the positioning plate 52 is connected to the conveying pipe 4, so the conveying pipe 4 can move up or down with the positioning plate 52, changing its position in the vertical direction. The limiting frame 51 is provided with a sliding groove 511 and a clearance groove 512. The positioning plate 52 can slide along the sliding groove 511 to prevent the positioning plate 52 from deflecting to both sides. The clearance groove 512 can ensure that the connection position of the conveying pipe 4 and the positioning plate 52 has sufficient room for movement when they move, and will not interfere with the limiting frame 51. Example 2

[0050] Based on Example 1, please refer to Figure 1-22 The gas injection assembly 2 also includes a bidirectional gas guide assembly 25, which includes a first gas guide pipe 251, a second gas guide pipe 252, a third gas guide pipe 253, a fourth gas guide pipe 254, and a fifth gas guide pipe 255. The first gas guide pipe 251 contains a first one-way valve 2511, the second gas guide pipe 252 contains a second one-way valve 2521, the third gas guide pipe 253 contains a third one-way valve 2531, the fourth gas guide pipe 254 contains a fourth one-way valve 2541 and a fifth one-way valve 2542, and the fifth gas guide pipe 255 contains a sixth one-way valve 2551 and a seventh one-way valve 2552. The bidirectional gas guide assembly 25 ensures that regardless of the direction in which the gas drive plate 22 moves, the carbon dioxide in the gas injection box 21 can continuously enter the second gas delivery pipe 242 through the third gas guide pipe 253, and the carbon dioxide on both sides of the gas drive plate 22 will not affect the movement of the gas drive plate 22.

[0051] Please see Figure 1-22When the air-driving plate 22 moves upward, the gas in the first air-guiding chamber 211 is discharged into the second air-supplying pipe 242 through the third air-guiding pipe 253. At this time, the second one-way valve 2521 can prevent the gas in the first air-guiding chamber 211 from entering the second air-guiding pipe 252, and the seventh one-way valve 2552 can prevent the gas in the first air-guiding chamber 211 from entering the fifth air-guiding pipe 255. At the same time, the carbon dioxide in the storage tank 3 first enters the first air-guiding pipe 251, and then is pumped into the second air-guiding chamber 212 through the fourth air-guiding pipe 254. The first one-way valve 2511 can prevent the gas in the second air-guiding pipe 252 from being pumped into the fourth air-guiding pipe 254, and the sixth one-way valve 2551 can prevent the gas in the fifth air-guiding pipe 255 from being pumped into the second air-guiding chamber 212.

[0052] Please see Figure 1-22 When the air-driving plate 22 moves downward, the gas in the second air-guiding chamber 212 enters the third air-guiding pipe 253 through the fifth air-guiding pipe 255, and then is discharged into the second air-supplying pipe 242. At this time, the third one-way valve 2531 can prevent the gas in the second air-guiding chamber 212 from entering the first air-guiding chamber 211, and the fifth one-way valve 2542 can prevent the gas in the second air-guiding chamber 212 from entering the fourth air-guiding pipe 254. At the same time, the carbon dioxide in the storage tank 3 first enters the first air-guiding pipe 251, and then is pumped into the first air-guiding chamber 211 through the second air-guiding pipe 252. The fourth one-way valve 2541 can prevent the gas in the fourth air-guiding pipe 254 from being pumped into the second air-guiding pipe 252. Example 3

[0053] Based on Example 1, please refer to Figure 1-22 The first actuator 53 includes a metal plate 531, a magnetic plate 532, a rack 533, a motor 534, and a gear 535. When it is necessary to control the conveying pipe 4 to move downward, the motor 534 drives the gear 535 to rotate forward, the gear 535 drives the rack 533 to move downward, and the rack 533 drives the conveying pipe 4 downward through the adjusting plate 52. At this time, the adjusting plate 52 slides along the slide groove 511. When the conveying pipe 4 reaches the designated position, the motor 534 stops working, the magnetic plate 532 can attract the metal plate 531, and the adjusting plate 52 and the conveying pipe 4 are suspended and remain stationary. When it is necessary for the conveying pipe 4 to change its direction of movement, the motor 534 drives the gear 535 to rotate in reverse, and the adjusting plate 52 drives the conveying pipe 4 to move upward. Example 4

[0054] Based on Example 1, please refer to Figure 1-24The first air supply pipe 241 is provided with a clearance channel 2411, and the adjustment assembly 5 also includes a locking assembly 54, which is located inside the clearance channel 2411. The locking assembly 54 can enable the adjustment plate 52 and the delivery pipe 4 to enter a locked state or a separated state, thereby enabling the adjustment plate 52 and the delivery pipe 4 to move together, or to remove the delivery pipe 4 from the adjustment assembly 5.

[0055] Please see Figure 1-24 The locking assembly 54 includes a plug-in plate 541, a plug-in post 542, and a second driver 543. The second driver 543 includes a connecting plate 5431 and a second electric telescopic rod 5432. When the adjusting plate 52 and the delivery pipe 4 need to enter the locked state, the second electric telescopic rod 5432 shortens, causing the plug-in plate 541 to move closer to the delivery pipe 4. The plug-in plate 541 slides along the inner wall of the assembly cavity 521, and the plug-in post 542 passes through the first insertion hole 522 and enters the second insertion hole 41 on the outer surface of the delivery pipe 4. The plug-in post 542 can provide support force to the delivery pipe 4, ensuring that the delivery pipe 4 and the adjusting plate 52 can move synchronously. In this embodiment, there are multiple first insertion holes 522 and multiple second insertion holes 41, so that the delivery pipe 4 is subjected to uniform force. The plug-in post 542 can also apply pressure to the delivery pipe 4, ensuring that the delivery pipe 4 can slide along the outer surface of the first air supply pipe 241 and the limiting frame 51, increasing the stability of the delivery pipe 4. When the delivery pipe 4 moves vertically, the plug pin 542 and the second actuator 543 both move within the clearance channel 2411, so the plug pin 542 and the second actuator 543 will not interfere with the first air supply pipe 241. When the adjustment plate 52 and the delivery pipe 4 need to enter the separation state, the second electric telescopic rod 5432 extends, driving the plug plate 541 away from the delivery pipe 4, the plug pin 542 leaves the second socket 41 and returns to the first socket 522. At this time, the connecting plate 5431 is removed from the top of the delivery pipe 4, the delivery pipe 4 is no longer restricted, and the delivery pipe 4 can be removed from the adjustment assembly 5.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A carbon dioxide-assisted oil and gas recovery and storage device for a coal-oil-gas symbiotic zone, characterized in that, include: Base; The gas injection assembly is located above the base; A storage tank is fixedly mounted on the top of the base, and the air inlet end of the air injection assembly is connected to the interior of the storage tank; A delivery pipe is located above the base, and the air outlet of the air injection assembly is connected to the interior of the delivery pipe. An adjustment component is located above the base, and the output end of the adjustment component is connected to the conveying pipe for driving the conveying pipe to move vertically. The adjustment component includes: A limiting frame is fixedly installed on the top of the base. The limiting frame has a sliding groove on the side wall away from the conveying pipe and an avoidance groove on the side wall facing the conveying pipe. The avoidance groove communicates with the sliding groove. The length of the limiting frame is greater than the length of the conveying pipe, and the conveying pipe can slide along the side wall of the limiting frame. The adjusting plate is disposed in the slide groove and can slide along the slide groove. The length of the adjusting plate is greater than the length of the limiting frame. The bottom of the adjusting plate facing the conveying pipe is connected to the conveying pipe. The first driver is fixedly mounted on the top of the base. The output end of the first driver is connected to the adjustment plate and is used to drive the adjustment plate to move in the vertical direction.

2. The carbon dioxide flooding and gas recovery device for a coal-oil-gas symbiotic zone according to claim 1, characterized in that, The gas injection assembly includes: An air injection box is fixedly installed on the top of the base; An air-driving plate is disposed inside the air-injection box and can slide along the inner wall of the air-injection box. The air-driving plate divides the interior of the air-injection box into a first air-guiding chamber and a second air-guiding chamber. Both the first air-guiding chamber and the second air-guiding chamber are connected to the interior of the storage tank. The first electric telescopic rod is located below the air injection box. The output end of the first electric telescopic rod extends into the air injection box and is fixedly connected to the air-driving plate. An air supply assembly includes a first air supply pipe, the top of which is located outside the delivery pipe and is fixedly connected to the top of the limiting frame. There is a gap between the first air supply pipe and the clearance groove. The bottom of the first air supply pipe extends into the delivery pipe. The interiors of the first air guide cavity, the second air guide cavity, and the delivery pipe are all in communication with the interior of the first air supply pipe.

3. The carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone according to claim 2, characterized in that, The air delivery assembly further includes a second air delivery pipe and an isolation plate. The length of the first air delivery pipe is the same as the length of the delivery pipe. The second air delivery pipe and the isolation plate are respectively fixedly disposed at the top and bottom of the first air delivery pipe. The first air guide cavity and the second air guide cavity are both connected to the interior of the first air delivery pipe through the second air delivery pipe. The isolation plate can slide along the inner wall of the delivery pipe. The bottom surface of the isolation plate is provided with an exhaust cavity, which is connected to the interior of the first air delivery pipe.

4. The carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone according to claim 3, characterized in that, The gas injection assembly further includes a bidirectional gas guide assembly, which includes: A first gas guide pipe is disposed between the gas injection box and the storage tank, and the first end of the first gas guide pipe is connected to the interior of the storage tank. The second air guide tube is disposed between the air injection box and the first air guide tube. The first end of the second air guide tube is connected to the second end of the first air guide tube. The second end of the first air guide tube is provided with a first one-way valve. The second end of the second air guide tube is fixedly disposed on the top surface of the air injection box and is connected to the first air guide cavity. The second end of the second air guide tube is provided with a second one-way valve. The third air guide tube has its first end fixedly disposed on the top surface of the air injection box and connected to the first air guide cavity. The first end of the third air guide tube is provided with a third one-way valve. The second end of the third air guide tube is connected to the first end of the second air delivery tube, and the second end of the second air delivery tube is connected to the interior of the first air delivery tube.

5. The carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone according to claim 4, characterized in that, The bidirectional air guide assembly further includes: A fourth air guide tube is disposed between the air injection box and the first air guide tube. The first end of the fourth air guide tube is connected to the middle part of the first air guide tube. The second end of the fourth air guide tube is fixedly disposed on the bottom surface of the air injection box and is connected to the second air guide cavity. A fourth one-way valve and a fifth one-way valve are respectively provided at both ends of the fourth air guide tube. The fifth air guide tube is located on the side of the air injection box away from the first air guide tube. The first end of the fifth air guide tube is fixedly installed on the bottom surface of the air injection box and communicates with the second air guide cavity. The second end of the fifth air guide tube communicates with the middle part of the third air guide tube. The two ends of the fifth air guide tube are respectively provided with a sixth one-way valve and a seventh one-way valve.

6. The carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone according to claim 2, characterized in that, The first driver includes: A metal plate is fixedly mounted on the side wall of the limiting frame; A magnet plate is fixedly mounted on the side wall of the adjustment plate; A rack is fixedly mounted on the side wall of the adjusting plate away from the conveying pipe, and the length of the rack is the same as the length of the adjusting plate. The motor is fixedly mounted on the top of the base, and the output end of the motor is fixedly connected to the gear, which meshes with the rack for transmission.

7. The carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone according to claim 2, characterized in that, The first air supply pipe is provided with an avoidance channel, which penetrates the side wall of the first air supply pipe. The depth extension direction of the avoidance channel is the same as the depth extension direction of the avoidance groove. The avoidance channel is not connected to the interior of the first air supply pipe. The adjustment component also includes a locking component, which is located inside the avoidance channel. The adjustment plate is connected to the delivery pipe through the locking component.

8. The carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone according to claim 7, characterized in that, The locking component includes: The plug-in plate has an assembly cavity inside, the top of which penetrates the side wall of the adjustment plate facing the clearance groove. The plug-in plate is disposed in the assembly cavity and can slide along the inner wall of the assembly cavity. The insertion post has a first insertion hole on the side wall of the adjustment plate. The first end of the insertion post is fixedly connected to the side wall of the insertion plate facing the clearance groove. The second end of the insertion post extends into the first insertion hole and can slide along the inner wall of the first insertion hole. The length of the insertion post is greater than the depth of the first insertion hole. The depth of the assembly cavity is greater than the sum of the thickness of the insertion plate and the length of the insertion post. The outer surface of the delivery pipe has a second insertion hole, which corresponds to the position of the first insertion hole. A second driver is located at the top of the delivery pipe. The output end of the second driver passes through the clearance channel and is connected to the top of the plug-in plate. The second driver is used to drive the plug-in plate to move horizontally.

9. The carbon dioxide flooding and gas storage device for a coal-oil-gas symbiotic zone according to claim 8, characterized in that, There are multiple plug pins, the first socket and the second socket, and they are distributed at equal intervals from top to bottom; The second driver includes: A connecting plate is disposed at the top of the conveying pipe and is detachably connected to the conveying pipe; The second electric telescopic rod is fixedly installed on the side wall of the connecting plate facing the clearance channel. The output end of the second electric telescopic rod extends into the assembly cavity and is fixedly connected to the plug-in plate.

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