A large-diameter pipe well liquid lifting device

Abstract

The present application relates to the technical field of well liquid lifting device, and specifically discloses a large-diameter pipeline well liquid lifting device, which comprises a tank body, a steady flow plate, a wave-preventing and bubble-removing device and overflow plates, the overflow plates are provided in two, the two overflow plates form a storage space with the inner wall of the tank body, the bottom of the overflow plate on the left is provided with a communication hole, a partition plate is arranged between the two overflow plates to divide the storage space into a water storage space and an oil storage space, a gas groove is formed in the partition plate, an upward protrusion is arranged around the gas groove, the top of the protrusion is higher than the top of the overflow plate, a stirring assembly is arranged in the protrusion, an abutting piece for deflecting the upper stirring piece is arranged between the upper stirring piece and the lower stirring piece, and an opening and closing assembly for opening or closing the opening is arranged on the overflow plate; the oil and water are stirred respectively by the upper and lower stirring pieces to avoid emulsification; and the natural gas in the oil can be discharged from the oil storage space in time through the opening and closing assembly and the opening.

Description

Technical Field

[0001] This invention relates to the field of well fluid extraction devices, specifically to a fluid extraction device for large-diameter pipeline wells. Background Technology

[0002] In the extraction of natural gas, especially unconventional resources such as shale gas and tight gas, the widespread application of fracturing technology results in the production of large amounts of produced water from gas wells. This produced water has a complex composition, containing high concentrations of salt inherent in formation water, trace amounts of dissolved hydrocarbons, and residual chemical additives. Its treatment and compliant discharge / reuse are crucial for ensuring safe production and environmental protection in gas fields. In surface gathering and transportation systems, produced water is transported through pipelines to large-diameter pipeline wells for treatment. Separators are installed in these large-diameter pipeline wells to separate water and oil / gas.

[0003] Chinese patent document CN117379835B discloses a self-regulating oil-gas-water three-phase separator, relating to the petrochemical field. It includes a shell, an inlet pipe connected to one side of the shell, an outlet pipe connected to the top of the shell, a mist eliminator installed at the top of the inner wall of the shell, and several baffles fixedly connected at equal intervals to the bottom of the inner wall of the shell. This self-regulating oil-gas-water three-phase separator, through the cooperation of a liquid box and a drain hole, allows the mixture entering the separator to be divided into smaller streams. Furthermore, when the smaller streams with higher flow velocities collide with the rotating disc surface downstream, they are further divided into even smaller states. The mixture, as the turntable rotates and drives the striking plate to rotate, will come into contact with the mixture in this state, and under the action of centrifugal force, the mixture will be thrown out, causing it to collide with the surface of the enclosure or baffle and diffuse again. This allows the natural gas in the mixture to be separated from the oil and water more efficiently. By using the expansion mechanism, the oil film floating on the surface of the water can be intermittently expanded, so that the natural gas carried under the oil film can better pass through the oil film layer and be discharged. This avoids the situation where the thick oil film blocks the discharge of natural gas, causing some natural gas to be discharged from the drain pipe with the water.

[0004] In the above technical solution, the oil film floating on the water surface is pushed apart by the expansion mechanism, so that natural gas can pass through the oil film and be discharged. However, in the actual three-phase separation process, the oil layer is relatively thick. After the oil film is pushed by the pusher plate on the expansion mechanism, the oil film will quickly merge. The time for natural gas to separate from the water phase is relatively short, which leads to poor separation effect of natural gas from the water phase. Moreover, pushing the oil film by the pusher plate may also cause water-oil emulsification, affecting water-oil separation. Summary of the Invention

[0005] This invention provides a fluid extraction device for large-diameter pipeline wells, aiming to solve the problem that the three-phase separator in related technologies does not achieve good separation of natural gas from the water phase and oil phase during three-phase separation.

[0006] A fluid extraction device for a large-diameter pipeline well includes: a tank, a flow stabilizer, a wave defoamer, and an overflow plate. Two overflow plates are provided, and the two overflow plates and the inner wall of the tank form a storage space. A connecting hole is provided at the bottom of the overflow plate on the left side. A partition is provided between the two overflow plates to divide the storage space into a water storage space and an oil storage space. An air groove is provided on the partition plate, and an upward protrusion is provided around the air groove. The top of the protrusion is higher than the top of the overflow plate.

[0007] A stirring assembly is installed inside the protrusion. The stirring assembly includes a drive assembly, an upper stirring element, and a lower stirring element. The upper stirring element is rotatably mounted on the drive assembly, and the lower stirring element is slidably mounted on the drive assembly. Both the upper and lower stirring elements move circumferentially along the protrusion. An abutment is installed between the upper and lower stirring elements to deflect the upper stirring element. When the lower stirring element moves upward, the abutment triggers, causing the upper stirring element to deflect to a horizontal state. A float is provided on the lower stirring element so that when the water level in the water storage space rises, the lower stirring element moves upward. An opening is provided on the overflow plate on the right side, and an opening and closing assembly is provided on the overflow plate for opening or closing the opening.

[0008] Its effect is as follows: By setting two overflow plates, when the oil-water mixture flows through the flow stabilizer and the anti-wave defoamer, the oil and water gradually separate under their own gravity. A baffle is installed between the two overflow plates to create oil and water storage spaces between the overflow plates and the tank body. Air channels are installed on the baffles; the upper agitator agitates the oil storage space, and the lower agitator agitates the water storage space, thereby venting the natural gas in the oil and water. The natural gas in the water overflows upwards from the air channels. The oil and water are agitated separately, preventing the mixture from separating during agitation. Oil and water emulsify. By setting up a stopper, when oil flows into the oil storage space from the overflow plate on the left, it pushes the oil in the original oil storage space to the right and flows down from the overflow plate on the right. The upper stirring component changes from a vertical state to a horizontal state to avoid affecting the movement of oil in the oil storage space. By setting up an opening and opening and closing component, when oil in the oil storage space flows down from the overflow plate on the right, the opening opens to allow oil to flow out. When the water level in the water storage space rises to a certain height, the opening and closing component closes the opening.

[0009] Preferably, the drive assembly includes a drive motor, a drive pulley, a driven pulley, and a conveyor belt. The drive motor is mounted on the tank body, the drive pulley is mounted on the output end of the drive motor, the driven pulley is rotatably mounted on the tank body, and the conveyor belt is connected between the drive pulley and the driven pulley. The drive motor rotates to drive the drive pulley, which in turn causes the driven pulley to rotate via the conveyor belt. The movement of the conveyor belt drives the stirring assembly to move, which in turn drives the upper and lower stirring components to move.

[0010] Preferably, the upper agitator includes multiple mounting blocks evenly arranged along the circumference of the conveyor belt. Each mounting block is rotatably mounted with a rotating shaft, and an upper agitator plate is fixedly mounted on the rotating shaft, extending into the oil storage space. The lower agitator includes a mounting rod, and the mounting blocks have sleeves in the vertical direction. The mounting rod is slidably mounted in the sleeves, and a lower agitator plate is mounted on the mounting rod, extending into the water storage space. The movement of the conveyor belt drives the mounting blocks to move, which in turn drives the upper and lower agitator plates to move. The upper agitator plate agitates the oil storage space, and the lower agitator plate agitates the water storage space. The oil and water are agitated separately, which avoids emulsification during agitation. Natural gas in the oil escapes upwards, and natural gas in the water escapes from the gas tank.

[0011] Preferably, the abutment includes a gear fixedly mounted on the rotating shaft and a rack mounted on the mounting rod, the gear and rack meshing with each other; by providing the abutment, when the water level rises, the mounting rod moves upward under the buoyancy of the lower stirring plate, which in turn moves the rack upward, the gear rotates, causing the rotating shaft to rotate, which in turn changes the upper stirring plate from a vertical state to a horizontal state; when the water level falls, the rack moves downward under the gravity of the lower stirring plate, which in turn changes the upper stirring plate from a horizontal state to a vertical state.

[0012] Preferably, a groove is provided on the lower stirring plate, and a buoyancy plate is slidably arranged in the groove. A torsion spring is installed between the rotating shaft and the mounting block, with one end of the torsion spring connected to the rotating shaft and the other end connected to the mounting block. By providing a groove on the lower stirring plate, when the water level rises, the buoyancy plate slides upward on the groove. When the water level continues to rise, the buoyancy of the buoyancy plate pushes the torsion spring to twist. At this time, the water level flows into the oil storage space after submerging the overflow plate. When the water level drops to the point where the buoyancy of the floating plate is less than the elastic force of the torsion spring, the upper stirring plate changes from a horizontal state to a vertical state. During the time period of water drainage and water intake in the oil storage space, the stirring time of the upper stirring plate on the oil storage space is extended as much as possible.

[0013] Preferably, a partition mesh is provided in the water storage space to divide the water storage space into an upper water storage space and a lower water storage space. The water outlet valve and the lower stirring plate are both located in the upper water storage space. When the lower stirring plate is driven by the drive component to stir the water storage space, only the water in the upper water storage space is stirred to avoid excessive exchange between the water in the upper water storage space and the water in the lower water storage space. A water outlet valve is provided in the upper water storage space so that when the water outlet valve discharges water, it only releases the water in the upper water storage space that has been stirred. When water enters the water storage space, the water flows upward from the lower water storage space into the upper water storage space.

[0014] Preferably, the opening and closing assembly includes an opening and closing plate, an elastic element, and a buoyancy element. The opening and closing plate is slidably mounted on the overflow plate. A connecting rod is provided at the bottom of the opening and closing plate, and the lower end of the connecting rod is connected to the buoyancy element, which is located in the water storage space. One end of the elastic element is connected to the overflow plate, and the other end is connected to the opening and closing plate. When the water level in the water storage space rises to a certain height, oil flows from the overflow plate on the left side to the oil storage space. At this time, the buoyancy element floats upward, driving the opening and closing plate to move upward and open the opening. The oil flowing in from the left side of the overflow plate pushes the oil that had already discharged natural gas out of the opening. At the same time, the elastic element is stretched. When the water level in the water storage space continues to rise to a certain height, the buoyancy element loses buoyancy, and the opening and closing plate closes the opening under the pull of the elastic element. At this time, the water level is still some distance from the highest point of the water storage space. When the water level in the water storage space reaches the highest point, the water in the water storage space needs to be drained. After the opening is closed by the opening and closing plate, the water level in the water storage space continues to rise to the highest point, thereby causing the oil level in the oil storage space to rise a certain distance.

[0015] Preferably, the elastic element is a tension spring, with one end connected to the overflow plate and the other end connected to the opening and closing plate. When the water level rises, the opening and closing plate rises and opens the opening. When the buoyancy element loses buoyancy, it pulls the opening and closing plate downward and closes the opening.

[0016] Preferably, the buoyancy component includes a buoyancy box with a top opening and a floating plate that slides vertically at the bottom of the buoyancy box. The buoyancy box has water outlets on both sides. When the water level rises, it first contacts the floating plate, pushing the floating plate upwards. During the upward movement of the floating plate, the water outlets are closed, creating a hollow space between the buoyancy box and the floating plate. As the water level continues to rise, this hollow space provides buoyancy to the opening and closing plate, causing it to rise. When the water level in the storage space reaches a certain height, water flows in from the top of the buoyancy box and fills it, at which point the buoyancy box loses buoyancy. Under the pulling action of the elastic element, the opening and closing plate closes the opening. When the water level drops to the point where the floating plate is no longer in contact with the water surface, the floating plate descends and opens the water outlets, allowing the water in the buoyancy box to drain. When the water level rises again, a hollow structure is formed between the floating plate and the buoyancy box once more.

[0017] Preferably, the floating plate is a hollow plastic plate; when the water level rises, the buoyancy plate can float up, and when the water level falls, the buoyancy plate can slide down under its own weight.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0019] 1. During the separation of oil, gas, and water, the mixture enters through the tank's inlet. After passing through the flow stabilizer and anti-wave defoamer, the oil and water gradually separate into layers due to gravity. The gas is discharged through a demister located at the top of the tank. Two overflow plates are located on the right side of the tank, separated by a partition to form independent oil and water storage spaces. The left overflow plate has a connecting hole to the water storage space. The partition has a gas groove, and a stirring assembly is installed within the gas groove. This stirring assembly includes an upper stirring assembly and a lower stirring assembly, used to stir the oil and water storage spaces respectively, to promote the separation and discharge of natural gas from the oil and water, and to prevent emulsification caused by the mixing of oil and water.

[0020] 2. After opening the outlet valve of the water storage space, the water level begins to drop, preventing the oil from flowing into the oil storage space. Start the stirring component to stir the oil storage space. When the water level in the water storage space rises again, the oil begins to flow into the oil storage space. Before the oil begins to flow in, the upper stirring plate is adjusted from a vertical position to a horizontal position to ensure that the newly entered oil can push the oil that has released natural gas to move to the right.

[0021] 3. An opening and its corresponding opening and closing mechanism are provided on the right overflow plate. When the water level reaches a certain height and the oil begins to flow from the left overflow plate into the storage space, the opening and closing mechanism opens the opening. As the water level in the storage space rises further, the opening and closing mechanism closes the opening, causing the oil level in the storage space to rise. When the water level in the storage space drops to a certain height, the oil level in the storage space no longer rises, causing the oil in the storage space that has had natural gas removed to be discharged, while the newly entered oil containing natural gas remains in the storage space. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the tank body of the present invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of the tank body of the present invention.

[0024] Figure 3 This is a schematic diagram of the stirring assembly of the present invention.

[0025] Figure 4 This is a schematic diagram of the structure of the abutment member of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the floating component of the present invention.

[0027] Figure 6 This is a schematic diagram of the opening and closing component of the present invention.

[0028] Figure 7 This is a schematic diagram of the buoyancy component of the present invention.

[0029] Figure label:

[0030] 1. Tank body; 11. Flow stabilizer; 12. Anti-wave defoamer; 13. Overflow plate; 14. Connecting hole; 15. Water storage space; 16. Oil storage space; 2. Baffle; 21. Air groove; 22. Protrusion; 3. Agitator assembly; 31. Drive assembly; 32. Upper agitator; 321. Mounting block; 322. Rotating shaft; 323. Upper agitator plate; 33. Lower agitator; 331. Mounting rod; 332. Sleeve; 333. Lower agitator plate; 4. Abutment component; 41. Gear; 42. Rack; 5. Floater component; 51. Slide groove; 52. Buoyancy plate; 53. Torsion spring; 6. Opening; 7. Opening and closing assembly; 71. Opening and closing plate; 72. Elastic component; 73. Buoyancy component; 731. Buoyancy box; 732. Floating plate; 8. Spacer mesh plate. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1-7As shown, a liquid lifting device for a large-diameter pipeline well includes a tank 1, a flow stabilizer 11, a wave-blocking and defoaming device 12, two overflow plates 13, and a baffle 2. The flow stabilizer 11 is located at one end near the inlet of the tank 1. The wave-blocking and defoaming device 12 is located at the bottom of the tank 1 and to the right of the flow stabilizer 11. The two overflow plates 13 are located to the right of the flow stabilizer 11 and welded to the inner wall of the tank 1. The baffle 2 is located between the two overflow plates 13. A connecting hole 14 is provided at the bottom of the left overflow plate 13. When the oil-gas-water mixture enters the tank 1, the flow stabilizer 11 reduces the flow velocity of the liquid entering the tank 1. The wave-blocking and defoaming device 12 makes the liquid flow more stable. When the liquid passes through the left overflow plate 13, the connecting hole 14 is located on the left side. At the bottom of the overflow plate 13, water enters the water storage space 15 through the connecting hole 14. Oil enters the oil storage space 16 after passing through the overflow plate 13 on the left. A water outlet valve is installed in the water storage space 15. When the water level in the water storage space 15 rises to a certain level, the water outlet valve opens to lower the water level. When the water level drops to a certain level, the water outlet valve closes. At this time, a communication device is formed between the water storage space 15 and the space on the left side of the overflow plate 13 in the tank body 1. When the water level in the water storage space 15 rises, the oil level in the space on the left side of the tank body 1 also rises. Since the density of oil is relatively low, the oil level in the space on the left side of the tank body 1 is higher than the water level in the water storage space 15. When the water level in the water storage space 15 rises to a certain height, the oil level is higher than the overflow plate 13, thus allowing the oil to enter the oil storage space 16.

[0033] The feed flow rate of tank 1 is denoted as a (only the flow rates of oil and water are recorded here). When the outlet valve in the water storage space 15 is opened, the flow rate of water flowing out of the water storage space 15 is denoted as b. b is greater than a. That is to say, when the water level in the water storage space 15 drops, even if tank 1 is continuously feeding, the oil level will drop to below the top of the overflow plate 13. When the level in the water storage space 15 drops to a certain position, the outlet valve is closed. When tank 1 feeds, it takes a certain amount of time for the liquid level on the left side of the overflow plate 13 to rise to a level higher than the overflow plate 13. During this time period, the oil in the oil storage space 16 is stirred to release the natural gas in the oil in the oil storage space 16.

[0034] When the water outlet valve is discharging water, the amount of water discharged by the water outlet valve is recorded as c. The liquid inlet of tank 1 includes the amount of oil and the amount of water. When the ratio of the amount of oil and the amount of water is basically fixed, the amount of water in tank 1 is recorded as d. c equals d. That is to say, the amount of water discharged by the water outlet valve each time is the same as the amount of water inlet of tank 1. The water level in the water storage space 15 rises and falls by the same height each time. When the water level rises, the amount of oil flowing through the water storage space 15 is also the same.

[0035] Since both water and oil contain a large amount of natural gas, a gas groove 21 is provided on the partition 2 to separate the natural gas in the water and oil. The gas groove 21 has upward protrusions 22 around its perimeter, and the top of the protrusions 22 is higher than the top of the overflow plate 13. When the mixture of oil, gas and water enters the tank 1, some natural gas is directly separated out. A demister is installed on the tank 1. After the natural gas passes through the demister, it flows out from the gas outlet on the tank 1. Natural gas in both water and oil needs to be separated. If the oil and water are not separated, stirring the mixed oil and water can easily lead to oil-water emulsification, which is not conducive to the separation of oil and water. Therefore, after the oil and water are separated by gravity, the oil and water are stirred separately to release the natural gas in the oil and water. By setting up the gas groove 21, the natural gas in the water is separated out and flows upward from the gas groove 21, avoiding the natural gas in the water being blocked by the oil layer after separation and difficult to release.

[0036] To allow the natural gas in the water storage space 15 and the oil storage space 16 to be discharged, a stirring assembly 3 is provided on the protrusion 22. The stirring assembly 3 includes a drive assembly 31, an upper stirring element 32, and a lower stirring element 33. The upper stirring element 32 is rotatably mounted on the drive assembly 31, and the lower stirring element 33 is slidably mounted on the drive assembly 31. An abutment 4 is installed between the upper stirring element 32 and the lower stirring element 33 to deflect the upper stirring element 32. When the lower stirring element 33 moves upward, the abutment 4 is triggered, thereby deflecting the upper stirring element 32 to a horizontal state. When the water level in the water storage space 15 rises, the lower stirring element 33 moves upward.

[0037] When stirring oil and water, the upper stirring component 32 and the lower stirring component 33 are driven by the drive component 31 to move along the circumference of the protrusion 22 to stir the oil and water separately, so as to avoid emulsification of oil and water when mixing and stirring, which would affect the separation between oil and water. After the natural gas in the oil is separated, it is demisted by the demister and then escapes from the gas outlet. After the natural gas in the water is separated, it flows upward through the gas tank 21 and escapes from the gas outlet after being demisted by the demister.

[0038] Specifically, the drive assembly 31 includes a drive motor, a drive pulley, a driven pulley, and a conveyor belt. The drive motor is mounted on the tank 1, the drive pulley is mounted on the output end of the drive motor, the driven pulley is rotatably mounted on the tank 1, and the conveyor belt is connected between the drive pulley and the driven pulley. The drive motor rotates to drive the drive pulley to rotate, and the power is transmitted to the driven pulley via the conveyor belt. The upper agitator 32 and the lower agitator 33 are both mounted on the conveyor belt. The movement of the conveyor belt drives the upper agitator 32 and the lower agitator 33 to move. The upper agitator 32 agitates the oil, and the lower agitator 33 agitates the water.

[0039] The upper agitator 32 includes multiple mounting blocks 321, which are evenly arranged around the circumference of the conveyor belt. Each mounting block 321 is rotatably equipped with a rotating shaft 322, and an upper agitator 323 is fixedly mounted on the rotating shaft 322. The upper agitator 323 extends into the oil storage space 16. The lower agitator 33 includes a mounting rod 331. A sleeve 332 in the vertical direction is opened on the mounting block 321. The mounting rod 331 is slidably mounted in the sleeve 332. A lower agitator 333 is mounted on the mounting rod 331 and extends into the water storage space 15. The upper agitator 323 and the lower agitator 333 are moved by the drive assembly 31 to agitate the oil and water respectively, so that the natural gas in the oil and water is separated.

[0040] When the water level in the water storage space 15 rises, the oil level in the tank 1 on the left side of the overflow plate 13 also rises. At this time, the natural gas in the oil storage space 16 has been released after being stirred. The oil flowing into the oil storage space 16 from the left side of the overflow plate 13 has a relatively high natural gas content. If the upper stirring element 32 in the oil storage space 16 is still below the oil level, the oil entering from the left side of the oil storage space 16 will have difficulty pushing the oil that was originally in the oil storage space 16 to the right and flowing out from the overflow plate 13 on the right. By setting the abutment element 4, when the water level in the water storage space 15 rises, the upper stirring element 32 in the oil storage space 16 is in a horizontal state, that is, the upper stirring element 32 is detached from the oil. When the oil containing natural gas enters from the overflow plate 13 on the left, it will push the oil that has already discharged natural gas to the right and flow out from the overflow plate 13.

[0041] The abutment 4 includes a gear 41 fixedly mounted on the rotating shaft 322 and a rack 42 mounted on the mounting rod 331. The gear 41 and the rack 42 mesh with each other. When the water level in the water storage space 15 rises, causing the mounting rod 331 to rise, the mounting rod 331 drives the rack 42 to move upward, thereby driving the gear 41 to rotate. The rotation of the gear 41 causes the rotating shaft 322 to rotate, thereby causing the upper stirring plate 323 to change from a vertical state to a horizontal state. When the water level in the water storage space 15 drops, the mounting rod 331 drops, and the mounting rod 331 drives the rack 42 to move downward, thereby causing the gear 41 to rotate in the opposite direction, thereby causing the upper stirring plate 323 to change from a horizontal state to a vertical state.

[0042] To ensure sufficient stirring time for the oil in the oil storage space 16 and to fully separate the natural gas from the oil, a float 5 is provided on the lower stirring plate 333. The float 5 includes a chute 51 on the lower stirring plate 333, in which a buoyancy plate 52 is slidably disposed. A torsion spring 53 is installed between the rotating shaft 322 and the mounting block 321, with one end of the torsion spring 53 connected to the rear of the rotating shaft 322 and the other end connected to the mounting block 321. The initial state is defined as the state after a volume c of water has been released from the water storage space 15. At this time, the outlet valve is closed, and the water level in the water storage space 15 rises. When the water level rises to a certain distance, the buoyancy plate 52 first floats upward. When the buoyancy plate 52 slides to the upper end of the chute 51, the water level continues to rise, causing the mounting rod 331 to move upward and push the rack 42 upward. As the rack 42 rises, it drives the gear 41 to rotate, which in turn causes the rotating shaft 322 to rotate. The rotation of the rotating shaft 322 causes the upper stirring plate 323 to change from a vertical state to a horizontal state. The water in the water storage space 15 continues to rise, causing the oil level on the left side of the overflow plate 13 to rise to a level that can pass over the overflow plate 13. At this time, the newly entered oil on the left side of the oil storage space 16 will push the oil that has discharged natural gas to move to the right. The oil that has discharged natural gas passes over the overflow plate 13 on the right side. When the water volume in the water storage space 15 reaches c, the water outlet valve opens, and the water level drops to a level where the buoyancy of the float plate 732 is less than the elastic force of the torsion spring 53. At this time, the upper stirring plate 323 changes from a horizontal state to a vertical state. During the time period of water drainage and water intake in the water storage space 15, the stirring time of the upper stirring plate 323 on the oil storage space 16 is extended as much as possible.

[0043] When newly entering oil on the left side of the oil storage space 16 pushes the oil that has already discharged natural gas to the right, it can push most of the oil that has already discharged natural gas to the right. In order to discharge as much oil that has already discharged natural gas as possible from the oil storage space 16, an opening 6 is provided on the overflow plate 13 on the right side. An opening and closing assembly 7 for opening or closing the opening 6 is slidably provided in the overflow plate 13. The opening and closing assembly 7 includes an opening and closing plate 71, an elastic element 72, and a buoyancy element 73. The opening and closing plate 71 is slidably provided on the overflow plate 13. A connecting rod is provided at the bottom of the opening and closing plate 71. The lower end of the connecting rod is connected to the buoyancy element 73, which is located in the water storage space 15. One end of the elastic element 72 is connected to the overflow plate 13, and the other end is connected to the opening and closing plate 71. When the water level in the water storage space 15 rises to a certain height... At this time, oil flows from the overflow plate 13 on the left side to the oil storage space 16. The buoyancy component 73 floats upward, which in turn drives the opening and closing plate 71 to move upward and open the opening 6. The oil flowing in from the left side of the overflow plate 13 will push the oil that was originally in the overflow plate 13 and had already discharged natural gas to flow out from the opening 6. At this time, the elastic component 72 is stretched. When the water level in the water storage space 15 rises to a certain height, the buoyancy component 73 loses buoyancy. Under the pull of the elastic component 72, the opening and closing plate 71 closes the opening 6. At this time, the water level is still some distance away from the highest point of the water level in the water storage space 15. When the water level in the water storage space 15 reaches the highest point, the water in the water storage space 15 needs to be discharged. After the opening and closing plate 71 closes the opening 6, the water level in the water storage space 15 continues to rise to the highest point, causing the oil level in the oil storage space 16 to rise a certain distance.

[0044] Specifically, the elastic element 72 is a tension spring, with one end connected to the overflow plate 13 and the other end connected to the opening and closing plate 71. The buoyancy element 73 includes a buoyancy box 731 with a top opening and a floating plate 732 that slides vertically at the bottom of the buoyancy box 731. The buoyancy box 731 has water outlets on both sides. When the water level rises, it first contacts the floating plate 52, thus pushing the floating plate 52 upward. The upward movement of the floating plate 52 first closes the water outlets, forming a hollow space between the buoyancy box 731 and the floating plate 52. When the water level rises, it provides buoyancy to the opening and closing plate 71, causing the opening and closing plate 71 to rise. When the water level in the water storage space 15 rises to a certain height, water flows in from the top of the buoyancy box 731 and fills the buoyancy box 731. At this time, the buoyancy box 731... When buoyancy is lost, the opening 6 is closed by the elastic element 72. When the water level drops to the point where the buoyancy plate 52 is no longer in contact with the water surface, the buoyancy plate 52 descends and opens the water outlet, allowing the water in the buoyancy box 731 to be discharged. When the water level rises again, a hollow structure is formed between the buoyancy plate 52 and the buoyancy box 731. The floating plate 732 is a hollow plastic plate with a certain weight. When the water level rises, the buoyancy plate 52 can float. When the water level drops, the buoyancy plate 52 can slide downward under its own weight. The outer periphery of the opening and closing plate 71 is wrapped with rubber material. When the opening and closing plate 71 descends, it can seal with the overflow plate 13, so that the oil storage space 16 can be sealed. When the upper stirring element 32 stirs the oil storage space 16, the natural gas in the oil is discharged.

[0045] A partition mesh plate 8 is provided in the water storage space 15. The partition mesh plate 8 is used to divide the water storage space 15 into an upper water storage space and a lower water storage space. The water outlet valve and the lower stirring plate 333 are both located in the upper water storage space. When the lower stirring plate 333 is driven by the drive component 31 to stir the water storage space 15, only the water in the upper water storage space is stirred to avoid excessive exchange between the water in the upper water storage space and the water in the lower water storage space. A water outlet valve is provided in the upper water storage space so that when the water outlet valve releases water, it only releases the water in the upper water storage space that has been stirred. When water enters the water storage space 15, the water flows upward from the lower water storage space into the upper water storage space.

[0046] Working principle:

[0047] During the separation of oil, gas, and water, the mixture enters through the inlet of tank 1. After passing through the flow stabilizer 11 and the anti-wave defoamer 12, the oil and water gradually separate into layers under their own gravity. The gas is discharged after passing through the demister located at the top of tank 1. Two overflow plates 13 are arranged on the right side of tank 1, and a partition 2 is set between the two overflow plates 13 to divide the space between the two overflow plates 13 and tank 1 into an oil storage space 16 and a water storage space 15. A connecting hole 14 communicating with the water storage space 15 is provided on the overflow plate 13 on the left side. A gas groove 21 is opened on the partition 2, and a stirring assembly 3 is set in the gas groove 21. The stirring assembly 3 is divided into an upper stirring assembly 3 and a lower stirring assembly 3. The upper stirring assembly 3 stirs the oil storage space 16, and the lower stirring assembly 3 stirs the water storage space 15 to separate natural gas from the oil and water. The oil is discharged to prevent emulsification caused by mixing and stirring. After the outlet valve in the water storage space 15 is opened, the water level in the water storage space 15 drops, and the oil no longer flows into the oil storage space 16. At this time, the stirring component 3 stirs the oil storage space 16. When the water level in the water storage space 15 rises, the oil flows into the oil storage space 16. Before the oil flows into the oil storage space 16, the upper stirring plate 323 changes from a vertical state to a horizontal state so that the oil newly entering the oil storage space 16 pushes the oil that has already discharged natural gas to the right. An opening 6 and an opening and closing component 7 for opening or closing the opening 6 are provided on the overflow plate 13 on the right side. When the water level rises to a certain height, that is, when the oil flows from the overflow plate 13 on the left side into the oil storage space 16, the opening and closing component 7 opens the opening 6. When the water level in the water storage space 15 continues to rise, the opening and closing component 7 closes the opening 6.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fluid lifting device for large-diameter pipeline wells, comprising a tank, a flow stabilizer, a wave-blocking and defoaming device, and an overflow plate, characterized in that: There are two overflow plates, which together with the inner wall of the tank form a storage space. The bottom of the overflow plate on the left side is provided with a connecting hole. A partition is provided between the two overflow plates to divide the storage space into a water storage space and an oil storage space. An air groove is provided on the partition, and an upward protrusion is provided around the air groove. A stirring assembly is installed inside the protrusion. The stirring assembly includes a drive assembly, an upper stirring component, and a lower stirring component. The upper stirring component is rotatably mounted on the drive assembly, and the lower stirring component is slidably mounted on the drive assembly. Both the upper and lower stirring components move along the circumference of the protrusion. An abutment component is installed between the upper and lower stirring components to deflect the upper stirring component. A floating component is provided on the lower stirring component so that when the water level in the water storage space rises, the lower stirring component moves upward. An opening is provided on the overflow plate on the right side, and an opening and closing assembly is provided on the overflow plate for opening or closing the opening. The drive assembly includes a drive motor, a drive pulley, a driven pulley, and a conveyor belt. The drive motor is mounted on the tank body, the drive pulley is mounted on the output end of the drive motor, the driven pulley is rotatably mounted on the tank body, and the conveyor belt is connected between the drive pulley and the driven pulley. The upper agitator includes multiple mounting blocks, which are evenly arranged around the circumference of the conveyor belt. Each mounting block is rotatably equipped with a rotating shaft, and an upper agitator plate is fixedly mounted on the rotating shaft. The upper agitator plate extends into the oil storage space. The lower agitator includes a mounting rod, and the mounting block has a sleeve in the vertical direction. The mounting rod is slidably mounted in the sleeve, and a lower agitator plate is mounted on the mounting rod. The lower agitator plate extends into the water storage space. The abutment includes a gear fixedly mounted on a rotating shaft and a rack mounted on a mounting rod, wherein the gear and the rack mesh with each other; The floating component includes a chute on the lower stirring plate, a buoyancy plate that slides within the chute, and a torsion spring installed between the rotating shaft and the mounting block. One end of the torsion spring is connected to the rotating shaft, and the other end is connected to the mounting block.

2. The fluid lifting device for large-diameter pipeline wells according to claim 1, characterized in that, The water storage space is equipped with a partition mesh plate, which is used to divide the water storage space into an upper water storage space and a lower water storage space. The water outlet valve and the lower stirring plate are both located in the upper water storage space.

3. The fluid lifting device for large-diameter pipeline wells according to claim 1 or 2, characterized in that, The opening and closing assembly includes an opening and closing plate, an elastic element, and a buoyancy element. The opening and closing plate is slidably mounted on the overflow plate. A connecting rod is provided at the bottom of the opening and closing plate. The lower end of the connecting rod is connected to the buoyancy element, which is located in the water storage space. One end of the elastic element is connected to the overflow plate, and the other end is connected to the opening and closing plate.

4. The fluid lifting device for large-diameter pipeline wells according to claim 3, characterized in that, The elastic element is a tension spring, with one end connected to the overflow plate and the other end connected to the opening and closing plate.

5. The fluid lifting device for large-diameter pipeline wells according to claim 3, characterized in that, The buoyancy component includes a buoyancy box with an opening at the top and a floating plate that slides vertically at the bottom of the buoyancy box. The buoyancy box has water outlet holes on both sides.

6. The fluid lifting device for large-diameter pipeline wells according to claim 5, characterized in that, The floating board is a hollow plastic board.

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