Recyclable three-stage oil and gas separation column

Abstract

The utility model relates to the technical field of oil and gas separation in pit, disclose recyclable three -stage oil and gas separation pipe column, including separation column, the top of separation column is equipped with roof, the inside of separation column is provided with separation mechanism, separation mechanism is used for multistage separation oil, gas, water, the left and right sides of roof all are provided with mounting mechanism, the mounting mechanism is used for quick installation roof, the separation mechanism includes a plurality of fixed cover, a plurality of fixed cover's outer wall installs in the inside bottom of separation column, the inside bottom fixed connection of two fixed cover of top has oil -repellent membrane. In the utility model, oil and gas mixture enters separation column, first passes through the oil -repellent membrane of fixed cover inside, oil is adhered and is guided from the oil suction pipe, and moisture is down and is worn; moisture to the lower fixed cover, the residual oil floats and is guided from the oil outlet of suction pipe; the impurity containing moisture reaches the cup bottom and is discharged through the water suction pipe, realize efficient separation, improve the crude oil recovery rate and the drainage cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of downhole oil and gas separation technology, and in particular to a three-stage oil and gas separation string that can be circulated and separated. Background Technology

[0002] The recyclable three-stage oil and gas separation string is a core downhole tool combination for the development of complex oil reservoirs in the field of oil and gas extraction. It is applied to the downhole fluid treatment stage of oil and gas well production. With "progressive separation + dynamic circulation" as its core design, it connects the first and second stages in series, and cooperates with the sealing and positioning unit, lifting unit and circulation unit to build a complete operation system from the mixed fluid inlet to the lifting of pure crude oil and the rational treatment of gas and water.

[0003] Oil and gas separation strings are mostly based on single-stage or two-stage separation structures. Their operation involves using a single separator to achieve initial gas-liquid separation through gravity difference, and then relying on a lift pump to transport the separated mixed fluid to the surface. Although this type of string can avoid gas lock problems caused by a large amount of free gas entering the lift channel to a certain extent and ensure basic production operations, existing separators mostly use fixed-volume separation chambers and do not have dynamically adjustable structures designed for the fluid characteristics of different production stages. When the gas-oil ratio decreases and the water cut increases in the later stages of reservoir development, the fixed separation parameters cannot adapt to the fluid changes, resulting in the inability to fully remove residual gas and formation water. There is a lack of efficient gas-liquid guiding and separation auxiliary structures. The first-stage separator does not have a swirling flow guiding component, and the free gas floats along a chaotic path. Some gas is carried by crude oil into subsequent stages. The second-stage separator does not have a fine bubble trapping structure. After the dissolved gas is released, it forms tiny bubbles that re-mix into the crude oil, ultimately leading to insufficient separation efficiency and a significant reduction in crude oil recovery rate. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a three-stage oil-gas separation string that can be circulated and separated. It aims to improve the problem that the separators in the existing technology mostly use a fixed volume separation chamber and do not design a dynamic control structure for the fluid characteristics of different mining stages, resulting in insufficient separation efficiency and significantly reduced crude oil recovery rate.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a three-stage oil-gas separation column that can be circulated and separated, including a separation column, a top plate installed on the top of the separation column, a separation mechanism provided inside the separation column, the separation mechanism being used for multi-stage separation of oil, gas and water, and installation mechanisms provided on both the left and right sides of the top plate, the installation mechanisms being used for quick installation of the top plate; The separation mechanism includes multiple fixed sleeves. The outer walls of the multiple fixed sleeves are installed on the inner bottom of the separation column. An oleophobic film is fixedly connected to the inner bottom of the top two fixed sleeves. The same suction tube is fixedly connected to the inside of each of the multiple fixed sleeves. Multiple oil outlets are opened on the top of the outer wall of the suction tube. The rear end of the inner bottom of each of the multiple fixed sleeves is connected to the same water suction tube. An oil suction tube is provided on the inner bottom of the top fixed sleeve.

[0006] As a further description of the above technical solution: The installation mechanism includes two clamping plates, which are fixedly connected to the left and right sides of the top plate respectively. The front and rear sides of the two clamping plates are provided with grooves. A spring is fixedly connected inside each of the grooves. A clamping block is fixedly connected to the opposite side of each spring. Connecting blocks are fixedly connected to the top left and right sides of the outer wall of the separating column. Compression components are provided on the front and rear sides of the two connecting blocks. A sealing component is provided at the bottom of the top plate.

[0007] As a further description of the above technical solution: The separation mechanism also includes multiple limiting strips, which are fixedly connected to the outer walls of multiple fixed sleeves, and the separation column has multiple limiting grooves inside.

[0008] As a further description of the above technical solution: The separation mechanism also includes an air outlet cylinder, the bottom of which penetrates the top of the top plate and is connected to the top of the oil outlet. The outer wall of the air outlet cylinder is provided with a threaded groove.

[0009] As a further description of the above technical solution: The installation mechanism also includes multiple telescopic sleeves, which are fixedly connected to each other in the interior of multiple grooves, and the opposite sides of the multiple telescopic sleeves are fixedly connected to each other in the interior of multiple locking blocks.

[0010] As a further description of the above technical solution: The extrusion assembly includes multiple springs, which are fixedly connected to each other on the front and rear sides of two connecting blocks, and extrusion columns are fixedly connected to the opposite sides of the multiple springs.

[0011] As a further description of the above technical solution: The sealing assembly includes a sealing ring, the top of which is fixedly connected to the bottom of the top plate, and a sealing groove is provided on the top of the separation column.

[0012] As a further description of the above technical solution: The outer wall of each water-absorbing pipe penetrates the top of two oleophobic membranes, and the multiple oleophobic membranes are all composed of polyethylene, polypropylene and polyvinylidene fluoride (PVDF).

[0013] This utility model has the following beneficial effects: 1. In this invention, after the oil-gas-water mixture enters the separation column, it first contacts the oleophobic film on the inner side of the fixed sleeve. The oleophobic film causes the oil to adhere and the water to penetrate downwards, achieving initial separation. The oil is then collected and discharged through the oil suction pipe; the water flows downwards into the lower fixed sleeve, and the residual oil floats upwards and is discharged through the oil outlet of the suction pipe, completing the secondary separation; the water containing impurities flows to the bottom of the fixed sleeve and is discharged centrally through the water suction pipe, completing the tertiary separation. This achieves efficient and graded separation of oil, gas, and water, avoids mixing of different media, improves the oil recovery efficiency and the cleanliness of water discharge, and provides a stable and reliable separation effect for oil-gas separation treatment.

[0014] 2. In this utility model, when installing the top plate, the bottom of the top plate is aligned with the top of the separation column, the clamping plate is attached to the connecting block, and the top plate is pushed to cause the connecting block to squeeze the clamping block to retract and the spring to compress. After the clamping block is aligned with the slot, the spring returns to its original position and pushes the clamping block into place, thus fixing the clamping plate and the top plate. When disassembling, the squeezing component is operated to push the clamping block to retract and disengage from the slot, and the top plate is pulled off. The sealing component simultaneously fills the gap, realizing the quick disassembly and assembly of the top plate, providing convenience for the maintenance of the separation mechanism, while ensuring the sealing of the separation process, preventing the leakage of the mixture and the entry of external impurities, ensuring the stable operation of the separation column, and meeting the actual needs of efficient maintenance and reliable separation. Attached Figure Description

[0015] Figure 1 This is a perspective view of the three-stage oil-gas separation column with recyclable separation proposed in this utility model; Figure 2 This is a front view of the recyclable three-stage oil-gas separation column proposed in this utility model; Figure 3 This is an exploded view of the sealing assembly in the recyclable three-stage oil-gas separation column proposed in this utility model; Figure 4 This is an exploded view of the separation mechanism in the recyclable three-stage oil-gas separation column proposed in this utility model; Figure 5 This is an exploded view of the installation mechanism in the three-stage oil-gas separation column with recyclable separation proposed in this utility model.

[0016] Legend: 1. Separating column; 2. Top plate; 3. Separating mechanism; 31. Fixing sleeve; 32. Oil-repellent film; 33. Suction tube; 34. Oil outlet; 35. Water suction tube; 36. Oil suction tube; 37. Limiting strip; 38. Limiting groove; 39. Air outlet; 4. Installation mechanism; 41. Clamping plate; 42. Groove; 43. Spring 1; 44. Clamping block; 45. Telescopic sleeve; 46. Connecting block; 47. Extrusion assembly; 471. Spring 2; 472. Extrusion column; 48. Sealing assembly; 481. Sealing ring; 482. Sealing groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1-4 An embodiment of this utility model is provided: a three-stage oil-gas separation column that can be circulated and separated, including a separation column 1, a top plate 2 installed on the top of the separation column 1, a separation mechanism 3 provided inside the separation column 1, the separation mechanism 3 is used for multi-stage separation of oil, gas and water, and an installation mechanism 4 is provided on both the left and right sides of the top plate 2, the installation mechanism 4 is used for quick installation of the top plate 2; The separation mechanism 3 includes multiple fixed sleeves 31. The outer walls of the multiple fixed sleeves 31 are installed on the inner bottom of the separation column 1. The inner bottom of the top two fixed sleeves 31 are fixedly connected to an oleophobic film 32. The inside of the multiple fixed sleeves 31 is fixedly connected to the same suction tube 33. The top of the outer wall of the suction tube 33 is provided with multiple oil outlets 34. The rear end of the inner bottom of the multiple fixed sleeves 31 is connected to the same water suction tube 35. The inner bottom of the top fixed sleeve 31 is provided with an oil suction tube 36. Specifically, during the three-stage oil-gas separation, the oil-gas-water mixture to be separated enters the separation column 1 and first contacts the oleophobic membrane 32 at the bottom of the inner side of the top fixed sleeve 31. Through the cooperation between the oleophobic membrane 32 and the mixture, the oil is attached to the surface of the oleophobic membrane 32 by utilizing its oleophobic properties, while the water flows downward through the oleophobic membrane 32, thus achieving the initial separation of oil and water. The oil attached to the surface of the oleophobic membrane 32 gathers under the action of gravity and flows into the oil suction pipe 36 at the bottom of the inner side of the top fixed sleeve 31. The oil that has been initially separated is transported to the designated collection area through the oil suction pipe 36. After initial separation, the water continues to flow downwards and enters the lower fixed sleeve 31. Through the layered arrangement of multiple fixed sleeves 31, the residual oil in the water is separated a second time. The residual oil floats upwards because its density is less than that of water and enters the interior of the suction tube 33 through the oil outlet 34 at the top of the outer wall of the suction tube 33. The suction tube 33 transports the oil separated in the second stage to the designated collection area. Through the cooperation of the suction tube 33 and the oil outlet 34, the oil floating in the water is collected efficiently, improving the oil separation efficiency. The small amount of impurities contained in the water after secondary separation flow with the water to the inner bottom rear end of the fixed sleeve 31. Through the water suction pipe 35 connected by the inner bottom rear ends of multiple fixed sleeves 31, the treated water is transported to the designated discharge area. Through the cooperation of the water suction pipe 35 and the fixed sleeve 31, the water is collected and discharged in a centralized manner, thus completing the three-stage separation process of oil, gas and water. Reference Figures 2-5 The installation mechanism 4 includes two clamping plates 41, which are fixedly connected to the left and right sides of the top plate 2 respectively. The front and rear sides of the two clamping plates 41 are provided with grooves 42. Springs 43 are fixedly connected inside the multiple grooves 42. Clamping blocks 44 are fixedly connected to the opposite side of the multiple springs 43. Connecting blocks 46 are fixedly connected to the top left and right sides of the outer wall of the separating column 1. Compression components 47 are provided on the front and rear sides of the two connecting blocks 46. Sealing components 48 are provided at the bottom of the top plate 2. Specifically, when installing the top plate 2, align the bottom of the top plate 2 with the top of the separating column 1, so that the retaining plates 41 on the left and right sides of the top plate 2 respectively abut against the connecting blocks 46 on the top left and right sides of the outer wall of the separating column 1. Push the top plate 2 downward, and the retaining plates 41 move with the top plate 2. The connecting blocks 46 squeeze the retaining blocks 44 on the front and rear sides of the retaining plates 41, causing the retaining blocks 44 to retract into the groove 42. The spring 43 is compressed. When the retaining plate 41 moves to the preset position, the retaining blocks 44 align with the slots on the connecting blocks 46, the spring 43 returns to its original deformation, and pushes the retaining blocks 44 out of the groove 42. The locking block 44 is inserted into the slot of the connecting block 46. Through the cooperation of the locking block 44 and the connecting block 46, and the spring 43 and the groove 42, the locking plate 41 is fixed on the connecting block 46, thereby realizing the connection and fixation between the top plate 2 and the separation column 1, and completing the quick installation of the top plate 2. At the same time, the sealing component 48 at the bottom of the top plate 2 is attached to the top of the separation column 1 along with the top plate 2. Through the cooperation of the sealing component 48 with the top plate 2 and the separation column 1, the gap between the top plate 2 and the separation column 1 is filled to prevent the leakage of the oil, gas and water mixture inside the separation column 1 and ensure the sealing of the separation process. When disassembling the top plate 2, the pressing components 47 on the front and rear sides of the connecting block 46 are operated. The pressing components 47 exert a pushing force on the locking block 44, causing the locking block 44 to overcome the elastic force of the spring 43 and retract into the groove 42. The locking block 44 disengages from the slot of the connecting block 46. Through the cooperation of the pressing components 47 and the locking block 44, the fixed constraint between the locking plate 41 and the connecting block 46 is released. The top plate 2 is pulled upward, causing the locking plate 41 to disengage from the connecting block 46, thus realizing the rapid disassembly of the top plate 2 and providing operating space for the maintenance and cleaning of the separation mechanism 3 inside the separation column 1. When the separation mechanism 3 performs oil-gas-water separation, the top plate 2 is fixed to the top of the separation column 1 by the installation mechanism 4, providing a closed environment for the inside of the separation column 1, preventing external impurities from entering the separation column 1 and affecting the separation effect, and preventing gas leakage during the separation process. After the separation is completed, if it is necessary to maintain the components of the fixing sleeve 31 and the oleophobic film 32 of the separation mechanism 3, the top plate 2 can be quickly removed by the installation mechanism 4. After the maintenance is completed, the top plate 2 can be quickly installed by the installation mechanism 4 to ensure that the separation column can be quickly restored to the working state. When maintaining the installation mechanism 4, check the fit between the locking block 44 and the connecting block 46, clean the impurities inside the locking block 44 and the slot, and ensure that the locking block 44 can smoothly engage and disengage; check the elasticity of the spring 43 and replace any spring 43 that has lost its elasticity; check the operation of the extrusion assembly 47 to ensure that the extrusion assembly 47 can normally push the locking block 44 to retract; check the integrity of the sealing assembly 48 and replace any damaged sealing assembly 48, ensuring the fixing and sealing effect of the installation mechanism 4, realizing the sealing guarantee of the rapid disassembly and separation process of the top plate 2, and providing support for the stable operation and convenient maintenance of the recyclable three-stage oil-gas separation column.

[0019] Reference Figures 4-5 The separation mechanism 3 also includes multiple limiting strips 37, which are fixedly connected to the outer walls of multiple fixed sleeves 31. Multiple limiting grooves 38 are provided inside the separation column 1. The separation mechanism 3 also includes an air outlet cylinder 39, the bottom of which penetrates the top of the top plate 2 and is connected to the top of the oil outlet 34. Threaded grooves are provided on the outer wall of the air outlet cylinder 39. The installation mechanism 4 also includes multiple telescopic sleeves 45, which are fixedly connected to the inner walls of multiple grooves 42. The opposite sides of the multiple telescopic sleeves 45 are fixedly connected to the adjacent sides of multiple locking blocks 44. Specifically, when installing the fixing sleeve 31, the limiting strips 37 on the outer walls of the multiple fixing sleeves 31 are embedded into the limiting grooves 38 inside the separation column 1, and the fixing sleeves 31 are pushed to move along the limiting grooves 38 to the preset position. Through the cooperation of the limiting strips 37 and the limiting grooves 38, the installation trajectory of the fixing sleeves 31 is limited, so as to prevent the fixing sleeves 31 from shifting or rotating inside the separation column 1, and to ensure that the multiple fixing sleeves 31 are kept coaxially set, providing a stable structural foundation for subsequent oil-gas-water separation. During the oil-gas separation process, the gas that has been initially separated enters the gas outlet 39 through the oil outlet 34 at the top of the suction pipe 33. The gas outlet 39 is connected to an external collection device through the threaded groove on the outer wall. The gas is transported to the collection device along the gas outlet 39. Through the cooperation of the gas outlet 39, the oil outlet 34, and the threaded groove, the directional discharge of gas and the stable connection of the external device are realized, gas leakage is avoided, and gas collection efficiency is improved. When the installation mechanism 4 is in operation, as the locking block 44 moves under the action of the spring 43, the telescopic sleeve 45 inside the groove 42 extends and retracts synchronously with the locking block 44. Through the cooperation of the telescopic sleeve 45 with the groove 42 and the locking block 44, the movement direction of the locking block 44 is limited, preventing the locking block 44 from deflecting due to the elastic force of the spring 43, ensuring that the locking block 44 can accurately engage or disengage from the slot of the connecting block 46, and improving the operational stability of the installation mechanism 4. During maintenance, after removing the top plate 2, the fixing sleeve 31 can be pulled out along the limiting groove 38 to check the fit between the limiting strip 37 and the limiting groove 38, and clean impurities; check the connection between the air outlet 39 and the oil outlet 34 to ensure smooth gas flow; check the telescopic performance of the telescopic sleeve 45, replace the damaged telescopic sleeve 45, which enhances the stability of the separation mechanism 3 and the reliability of the installation mechanism 4, and realizes efficient oil-gas-water separation and convenient equipment maintenance.

[0020] Reference Figures 3-5 The extrusion assembly 47 includes multiple springs 471, which are fixedly connected to the front and rear sides of two connecting blocks 46 respectively. Extrusion columns 472 are fixedly connected to the opposite sides of the multiple springs 471. The sealing assembly 48 includes a sealing ring 481, the top of which is fixedly connected to the bottom of the top plate 2. A sealing groove 482 is opened on the top of the separation column 1. The outer wall of the water suction pipe 35 penetrates the top of the two oleophobic membranes 32. The multiple oleophobic membranes 32 are all composed of polyethylene, polypropylene and polyvinylidene fluoride (PVDF). Specifically, when disassembling the top plate 2, press the squeezing column 472 towards the connecting block 46. The squeezing column 472 squeezes the second spring 471 to retract it. At the same time, the squeezing column 472 pushes the locking block 44 into the groove 42, causing the locking block 44 to disengage from the slot of the connecting block 46. Through the cooperation of the squeezing column 472 and the second spring 471, a pushing force can be applied to retract the locking block 44 without additional tools, simplifying the disassembly operation. After the pressing pressure disappears, the second spring 471 returns to its original shape, driving the squeezing column 472 to reset, preparing for the next disassembly, realizing convenient disassembly of the top plate 2 and facilitating the maintenance of the separation mechanism 3. During the oil-gas-water separation process, after the mixture to be separated enters the separation column 1, it first contacts the oleophobic membrane 32 on the inner side of the top fixing sleeve 31. The oleophobic membrane 32 is composed of polyethylene, polypropylene and polyvinylidene fluoride (PVDF). Through the cooperation between the oleophobic membrane 32 and the mixture, the oil is attached to the surface by utilizing its oleophobic properties, while the water flows downward through the oleophobic membrane 32. The outer wall of the suction pipe 35 penetrates the oleophobic membrane 32 to ensure that the water can flow smoothly into the suction pipe 35 and be discharged. Through the cooperation between the oleophobic membrane 32 of a specific material and the suction pipe 35, the oil-water separation efficiency is improved, and the oil is prevented from entering the suction pipe 35 with the water, thus ensuring the separation effect. The separated gas enters the gas outlet 39 through the oil outlet 34 of the suction pipe 33, and is connected to an external collection device through the threaded groove on the outer wall of the gas outlet 39 to achieve directional gas discharge. The limiting strip 37 cooperates with the limiting groove 38 to ensure that the fixed sleeve 31 is stable in the position inside the separation column 1 and avoids displacement due to fluid impact. During maintenance, the elasticity of the second spring 471 can be checked and the failed spring 471 can be replaced; the integrity of the sealing ring 481 can be checked and the damaged sealing ring 481 can be replaced; the separation performance of the oleophobic film 32 can be checked and the aged oleophobic film 32 can be replaced in time. This realizes convenient disassembly and assembly of the top plate 2, efficient sealing of the separation column 1 and efficient oil-water separation, and provides a guarantee for the stable operation of the oil-gas separation column.

[0021] Working principle: When installing the fixing sleeve 31, the limiting strips 37 on the outer walls of the multiple fixing sleeves 31 are embedded into the limiting grooves 38 inside the separation column 1, pushing the fixing sleeve 31 to move along the limiting grooves 38 to the preset position; through the cooperation of the limiting strips 37 and the limiting grooves 38, the installation trajectory of the fixing sleeve 31 is limited, preventing the fixing sleeve 31 from shifting or rotating inside the separation column 1, ensuring that the multiple fixing sleeves 31 are kept coaxial, providing a stable structural foundation for subsequent oil-gas-water separation. At the same time, the bottom inner side of the top two fixing sleeves 31 is fixedly connected to the oleophobic membrane 32, which is composed of polyethylene, polypropylene and polyvinylidene fluoride (PVDF); the outer wall of the suction pipe 35 penetrates the top of the two oleophobic membranes 32, ensuring that subsequent water can smoothly pass through the oleophobic membranes 32 and enter the suction pipe 35; the inside of the multiple fixing sleeves 31 is fixedly connected to the same suction pipe 33, the top of the outer wall of the suction pipe 33 is opened with multiple oil outlets 34, and the bottom inner side of the top fixing sleeve 31 is provided with an oil suction pipe 36, completing the assembly of the core components of the separation mechanism 3; First, align the sealing ring 481 at the bottom of the top plate 2 with the sealing groove 482 at the top of the separation column 1, and push the top plate 2 downward so that the sealing ring 481 is embedded in the sealing groove 482. Through the cooperation of the sealing ring 481 and the sealing groove 482, the gap between the top plate 2 and the separation column 1 is filled to prevent the leakage of oil, gas and water mixture or the entry of external impurities during the subsequent separation process. At the same time, make the clamping plates 41 on the left and right sides of the top plate 2 respectively attach to the connecting blocks 46 on the top left and right sides of the outer wall of the separation column 1. Continue to push the top plate 2 downward, and the connecting blocks 46 will squeeze the clamping blocks 44 on the front and rear sides of the clamping plates 41. The clamping blocks 44 will retract into the groove 42, the spring 43 will be compressed, and the telescopic sleeve 45 inside the groove 42 will move along with the clamping blocks. Block 44 retracts synchronously; when the card plate 41 moves to the preset position, the card block 44 aligns with the slot on the connecting block 46, the spring 43 returns to its original deformation, pushing the card block 44 outward from the groove 42, and the card block 44 is inserted into the slot of the connecting block 46. The telescopic sleeve 45 extends synchronously and limits the direction of movement of the card block 44. Through the cooperation of the card block 44 and the connecting block 46, the spring 43 and the groove 42, and the telescopic sleeve 45 and the card block 44, the card plate 41 is fixed on the connecting block 46, thereby realizing the connection and fixation between the top plate 2 and the separating column 1, and completing the quick installation of the top plate 2. At this time, the bottom of the air outlet 39 penetrates through the top of the top plate 2 and connects with the top of the oil outlet 34 of the suction pipe 33, preparing for subsequent gas export. The oil-gas-water mixture to be separated enters the separation column 1 and first contacts the oleophobic membrane 32 on the inner side of the top fixed sleeve 31. Through the interaction between the oleophobic membrane 32 and the mixture, the oil is attached to the surface of the oleophobic membrane 32 by utilizing its oleophobic properties, while the water flows downward through the oleophobic membrane 32, thus achieving the initial separation of oil and water. The oil attached to the surface of the oleophobic membrane 32 gathers under the action of gravity and flows into the oil suction pipe 36 at the bottom of the inner side of the top fixed sleeve 31. The oil that has been initially separated is transported to the designated collection area through the oil suction pipe 36, thus completing the first-stage separation. By using multiple fixed sleeves 31 in a layered arrangement, the residual oil in the water is separated in a secondary manner. The residual oil floats upward because its density is less than that of water, and enters the interior of the suction tube 33 through the oil outlet 34 at the top of the outer wall of the suction tube 33. The suction tube 33 then transports the oil separated in the secondary manner to the designated collection area. Through the cooperation of the suction tube 33 and the oil outlet 34, the oil floating in the water is collected efficiently, improving the oil separation efficiency and completing the secondary separation. The small amount of impurities in the water after the secondary separation flow with the water to the inner bottom rear end of the fixed sleeve 31. The treated water is transported to the designated discharge area through the water suction pipe 35, which is connected to the inner bottom rear end of multiple fixed sleeves 31. The water is collected and discharged in a centralized manner through the cooperation of the water suction pipe 35 and the fixed sleeve 31. At the same time, the gas generated during the separation process enters the gas outlet 39 through the oil outlet 34 of the suction pipe 33. The gas outlet 39 is connected to the external collection device through the threaded groove on the outer wall. The gas is transported to the collection device along the gas outlet 39, completing the three-stage separation. Press the squeezing column 472 towards the connecting block 46. The squeezing column 472 squeezes the second spring 471, causing it to retract. At the same time, the squeezing column 472 pushes the locking block 44 into the groove 42. The locking block 44 disengages from the slot of the connecting block 46, and the telescopic sleeve 45 retracts synchronously with the locking block 44. Through the cooperation of the squeezing column 472 and the second spring 471, the fixed constraint between the locking plate 41 and the connecting block 46 can be released without additional tools. Pull the top plate 2 upward, causing the locking plate 41 to disengage from the connecting block 46, realizing the quick disassembly of the top plate 2 and providing operating space for the maintenance of the separation mechanism 3 inside the separation column 1. During maintenance, the fixing sleeve 31 can be pulled out along the limiting groove 38 to check the fit between the limiting strip 37 and the limiting groove 38, and clean impurities; check the separation performance of the oleophobic film 32 and replace the aged oleophobic film 32; check the unobstructedness of the suction pipe 33, water suction pipe 35, and oil suction pipe 36, and clean the internal residual impurities; check the connection between the air outlet 39 and the oil outlet 34 to ensure smooth gas flow; at the same time, check the installation mechanism 4 and the extrusion assembly 47: clean the impurities inside the slots of the locking block 44 and the connecting block 46, and replace any that have failed to maintain elasticity. Check the spring 43; inspect the telescopic performance of the telescopic sleeve 45 and replace the damaged telescopic sleeve 45; inspect the elasticity of the spring 471 and replace the failed spring 471; inspect the integrity of the sealing ring 481 and replace the damaged sealing ring 481. After maintenance, reinstall the top plate 2 according to the above installation procedure to restore the separation column to its working state; it realizes efficient separation of oil, gas and water and convenient disassembly and maintenance of equipment, providing comprehensive guarantee for the stable operation of the recyclable three-stage oil-gas separation column.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-stage oil-gas separation string capable of recirculation and separation, comprising a separation column (1), characterized in that: The top of the separation column (1) is equipped with a top plate (2), and the separation column (1) is equipped with a separation mechanism (3). The separation mechanism (3) is used for multi-stage separation of oil, gas and water. The top plate (2) is equipped with an installation mechanism (4) on both the left and right sides. The installation mechanism (4) is used for quick installation of the top plate (2). The separation mechanism (3) includes multiple fixed sleeves (31). The outer walls of the multiple fixed sleeves (31) are installed on the inner bottom of the separation column (1). The inner bottom of the top two fixed sleeves (31) are fixedly connected to an oleophobic film (32). The inside of the multiple fixed sleeves (31) is fixedly connected to the same suction tube (33). The top of the outer wall of the suction tube (33) is provided with multiple oil outlets (34). The rear end of the inner bottom of the multiple fixed sleeves (31) is connected to the same water suction tube (35). The inner bottom of the top fixed sleeve (31) is provided with an oil suction tube (36).

2. The recyclable three-stage oil-gas separation string according to claim 1, characterized in that: The installation mechanism (4) includes two clamping plates (41), which are fixedly connected to the left and right sides of the top plate (2) respectively. The front and rear sides of the two clamping plates (41) are provided with grooves (42). A spring (43) is fixedly connected inside the grooves (42). A clamping block (44) is fixedly connected to the opposite side of the springs (43). A connecting block (46) is fixedly connected to the top left and right sides of the outer wall of the separating column (1). A pressing component (47) is provided on the front and rear sides of the two connecting blocks (46). A sealing component (48) is provided at the bottom of the top plate (2).

3. The recyclable three-stage oil-gas separation string according to claim 1, characterized in that: The separation mechanism (3) also includes multiple limiting strips (37), which are fixedly connected to the outer walls of multiple fixed sleeves (31) respectively, and multiple limiting grooves (38) are opened inside the separation column (1).

4. The recyclable three-stage oil-gas separation string according to claim 1, characterized in that: The separation mechanism (3) also includes an air outlet cylinder (39), the bottom of which penetrates the top of the top plate (2) and is connected to the top of the oil outlet (34). The outer wall of the air outlet cylinder (39) is provided with a threaded groove.

5. The recyclable three-stage oil-gas separation string according to claim 2, characterized in that: The installation mechanism (4) also includes a plurality of telescopic sleeves (45), which are fixedly connected to each other in the interior of a plurality of grooves (42), and the opposite sides of the plurality of telescopic sleeves (45) are fixedly connected to each other in the interior of a plurality of locking blocks (44).

6. The recyclable three-stage oil-gas separation string according to claim 2, characterized in that: The extrusion assembly (47) includes a plurality of springs (471), which are fixedly connected to each other on the front and rear sides of two connecting blocks (46), and extrusion columns (472) are fixedly connected to the opposite sides of the plurality of springs (471).

7. The recyclable three-stage oil-gas separation string according to claim 2, characterized in that: The sealing assembly (48) includes a sealing ring (481), the top of which is fixedly connected to the bottom of the top plate (2), and the top of the separation column (1) is provided with a sealing groove (482).

8. The recyclable three-stage oil-gas separation string according to claim 1, characterized in that: The outer wall of the water-absorbing pipe (35) penetrates the top of the two oleophobic membranes (32), and the multiple oleophobic membranes (32) are all composed of polyethylene, polypropylene and polyvinylidene fluoride (PVDF).

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