Oil-gas-water three-phase separation device for oil well

Abstract

The invention relates to the technical field of oil-gas-water separation, in particular to an oil-gas-water three-phase separation device for an oil well, which comprises a shell and a bottom plate, the bottom plate divides the interior of the shell into a separation cavity and a filter cavity, the top of the shell is provided with a gas outlet, the left side of the separation cavity is provided with an inlet, and the right side of the separation cavity is provided with an oil outlet; a water outlet I is formed in the bottom of the separation cavity, and a first separation layer and a second separation layer are arranged in the separation cavity. Side scraping rods are arranged at the two ends of the bottom scraping rod, a central rotating shaft is arranged in the middle of the bottom scraping rod, a motor is arranged in the filtering cavity, the output end of the motor is connected with the central rotating shaft, and an electric heating rod is arranged on the bottom scraping rod. Oil, gas and water fall on the conical plate after being collided and slowly flowing for multiple times on the first separation layer and the second separation layer, and gas is thoroughly separated from oil and water through multiple times of separation of the first separation layer, the second separation layer and the conical plate.

Description

Technical Field

[0001] The invention relates to the technical field of oil, gas and water separation, and in particular to an oil, gas and water three-phase separation device for oil wells. Background Art

[0002] On the ground, there is a device specifically used to separate the three phases of oil, gas and water in the formation fluid. This device can not only effectively separate the three substances, but also accurately measure their production. When the formation fluid enters the three-phase separator, it will first pass through an inlet diverter to initially separate the liquid from the gas. Under the action of gravity, due to the difference in density between oil and water, the free water will settle to the bottom of the container.

[0003] However, current oil-gas-water separation devices often have insufficient separation efficiency between gas and liquid, or require high costs. During the oil-water separation process, liquid oil sometimes condenses into oil blocks, causing blockage of the equipment. In addition, there is often residual sediment in the filtered water, affecting the water quality. In order to maintain the normal operation of the equipment, the filter plate needs to be replaced regularly during the filtration process, which increases the complexity and cost of maintenance. Therefore, how to improve the separation efficiency of gas and liquid and reduce maintenance work is still a problem that needs to be solved urgently. Summary of the invention

[0004] In order to solve the defects of the prior art, the present invention provides an oil-gas-water three-phase separation device for oil wells, which can fully separate gas from liquid and at the same time clean the mud and sand in the device to prevent the mud and sand from accumulating in the device.

[0005] The technical solution adopted by the present invention is: including a shell and a bottom plate, the bottom plate divides the inside of the shell into two parts: a separation chamber and a filter chamber. An air outlet is arranged at the top of the shell, an inlet is arranged at the left side of the separation chamber, an oil outlet is arranged at the right side of the separation chamber, a water outlet I is arranged at the bottom of the separation chamber, and a first separation layer and a second separation layer are arranged inside the separation chamber. The first separation layer includes a guide channel I, a diverter plate I, a diverter channel I and a collision plate I. The diverter channel I is merged at the connection with the collision plate I, and the guide channel I is connected to the inlet. The second separation layer includes a guide channel II, a diverter plate II, a diverter channel II and a collision plate II. The guide channel II is connected to the collision plate I, and the diverter channel II is merged at the connection with the collision plate II. The diverter plate II is located below the gap between the diverter channels I, and the collision plate II is connected to the output channel. The diverter channel I and the diverter channel II both have a certain slope, and a conical plate is arranged below the output channel. The collision plate I and the collision plate II are both fixedly connected to the shell.

[0006] Oil, gas and water enter the diversion channel I from the inlet, collide with the diversion plate I and enter the diversion channel I, merge at the collision plate I and collide with the collision plate I to enter the diversion channel II, collide with the diversion plate II and enter the diversion channel II, then merge at the collision plate II and collide with the collision plate II to enter the output channel and fall on the conical plate, the gas is separated from the oil and water, and the oil and water finally fall to the bottom of the separation chamber. After multiple collisions and slow flow, the gas is completely separated from the oil and water. Diversion channel I and diversion channel II both have a certain slope, which has an accelerating effect on oil, gas and water, so that the oil, gas and water have a higher speed when colliding with diversion plate I and diversion plate II, and the gas separation effect is better. Diversion plate II is located below the gap between diversion channel I, so that the gas separated by collision at diversion plate II can more easily reach the outlet.

[0007] Preferably, a bottom scraper is provided at the bottom of the separation chamber, side scrapers are provided at both ends of the bottom scraper, a central shaft is provided in the middle of the bottom scraper, a motor is provided in the filter chamber, the output end of the motor is connected to the central shaft, and an electric heating rod is provided on the bottom scraper. The side scrapers and the electric heating rod rotate with the central shaft to stir the liquid in the separation chamber, and fully heat the liquid in the separation chamber to prevent the liquid oil from condensing into oil blocks to block the pipeline. The side scrapers can also scrape the side walls of the separation chamber to prevent the mud and sand from forming dirt on the side walls of the separation chamber. The bottom scraper can clean the mud and sand at the bottom of the separation chamber, so that the mud and sand quickly enter the filter chamber to prevent the mud and sand from accumulating at the bottom of the separation chamber.

[0008] Preferably, a filter plate is arranged directly below the water outlet I, a water collecting tank is arranged below the filter plate, the filter plate is an inclined structure with the left side higher than the right side, the right side of the filter plate is rotatably connected to the water collecting tank, a spring is arranged on the water collecting tank, the left side of the filter plate is elastically connected to the water collecting tank through the spring, a bevel gear is arranged on the central rotating shaft, the bevel gear is rotatably connected to the bevel gear, a connecting rod is arranged on the bevel gear, a deflection wheel is arranged on the connecting rod, the deflection wheel is rotatably connected to the filter plate, and a water outlet II is arranged below the water collecting tank. The bevel gear and the bevel gear cooperate to make the deflection wheel rotate with the rotation of the central rotating shaft, and the filter plate vibrates with the rotation of the deflection wheel, thereby shaking off the sediment on the filter plate and preventing sediment from accumulating on the filter plate.

[0009] Preferably, a dirt collecting box is provided on the right side of the water collection tank, a drainage channel is provided on the right side of the filter chamber, and a sealing window is provided on the drainage channel. At regular intervals, the staff can open the sealing window to clean and replace the dirt collecting box, and the filter plate can be cleaned without disassembling the device.

[0010] Preferably, the top of the central rotating shaft is connected to the conical plate, and the top of the electric heating rod is connected to the conical plate, so that the conical plate rotates with the central rotating shaft, and the effect of separating gas is better when oil, gas and water fall onto the conical plate.

[0011] The transmission ratio between the bevel gear and the bevel gear is small, that is, the number of teeth on the bevel gear is larger than that on the bevel gear, so that when the central shaft rotates slowly, the deflection wheel can rotate quickly to vibrate the filter plate.

[0012] Preferably, a guide groove is provided on the right side of the water collection tank, a guide protrusion is provided on the left side of the dirt collection box, the guide groove matches the guide protrusion, and a handle is provided on the dirt collection box. It is convenient for the staff to replace the dirt collection box, and after the guide protrusion matches the guide groove, the mud and sand shaken off by the filter plate vibration can fall into the dirt collection box.

[0013] Preferably, a partition is provided between the motor and the water collecting tank.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. After the oil, gas and water are separated by multiple collisions and slow flows in the first and second separation layers, they fall onto the rotating conical plate to separate the gas again, so that the gas is completely separated from the oil and water, improving the separation efficiency of gas and liquid, and the device has a simple structure and low cost.

[0016] 2. The rotation of the side scraper and the electric heating rod can stir the liquid in the separation chamber, fully heat the liquid in the separation chamber, and prevent the liquid oil from condensing into oil blocks to block the pipeline. The side scraper can also scrape the side wall of the separation chamber to prevent the silt from forming dirt on the side wall of the separation chamber. The bottom scraper can clean the silt at the bottom of the separation chamber, allowing the silt to quickly enter the filter chamber to prevent the silt from accumulating at the bottom of the separation chamber.

[0017] 3. The bevel gear and the bevel gear cooperate to make the deflection wheel rotate with the rotation of the central shaft, and the filter plate vibrates with the rotation of the deflection wheel, so as to shake off the sediment on the filter plate and prevent the sediment from accumulating on the filter plate. At regular intervals, the staff can open the sealing window to clean and replace the dirt collection box without disassembling the device to complete the cleaning of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 Schematic diagram of the internal structure of the separation chamber;

[0021] Figure 3 It is a schematic diagram of the structure of the first separation layer, the second separation layer and the output channel;

[0022] Figure 4Schematic diagram of the internal structure of the filter chamber;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure enlargement of part A;

[0024] Figure 6 It is a schematic diagram of the structure of the deflection wheel, filter plate, spring, water collection tank and dirt collection box;

[0025] Figure 7 It is a schematic diagram of the structure of the connection between the dirt collecting box and the water collecting tank.

[0026] In the figure: 1. housing; 101. separation chamber; 102. filter chamber; 2. bottom plate; 3. air outlet; 4. inlet; 5. oil outlet; 6. water outlet I; 7. first separation layer; 701. flow guide channel I; 702. flow divider plate I; 703. flow divider channel I; 704. collision plate I; 8. second separation layer; 801. flow guide channel II; 802. flow divider plate II; 803. flow divider channel II; 804. collision plate II; 9. output outlet channel; 10. conical plate; 11. bottom scraper rod; 12. side scraper rod; 13. central shaft; 14. motor; 15. electric heating rod; 16. filter plate; 17. water collecting tank; 18. spring; 19. bevel gear; 20. bevel gear; 21. connecting rod; 22. deflection wheel; 23. water outlet II; 24. sewage collecting box; 25. sewage discharge channel; 26. sealing window; 27. guide groove; 28. guide protrusion; 29. ​​handle; 30. partition. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] An oil-gas-water three-phase separation device for oil wells comprises a shell 1 and a bottom plate 2, wherein the bottom plate 2 divides the interior of the shell 1 into two parts: a separation chamber 101 and a filter chamber 102. An air outlet 3 is arranged at the top of the shell 1, an inlet 4 is arranged at the left side of the separation chamber 101, an oil outlet 5 is arranged at the right side of the separation chamber 101, a water outlet I6 is arranged at the bottom of the separation chamber 101, and a first separation layer 7 and a second separation layer 8 are arranged inside the separation chamber 101. The first separation layer 7 comprises a guide channel I701, a diverter plate I702, a diverter channel I703 and a collision plate I704, the diverter channel I703 is merged at the connection with the collision plate I704, and the guide channel I701 is connected to the inlet 4. The second separation layer 8 includes a guide channel II 801, a diverter plate II 802, a diverter channel II 803 and a collision plate II 804. The guide channel II 801 is connected to the collision plate I 704, and the diverter channel II 803 is merged at the connection with the collision plate II 804. The diverter plate II 802 is located below the gap between the diverter channels I 703, and the collision plate II 804 is connected to the output channel 9. The diverter channel I 703 and the diverter channel II 803 both have a certain slope, and a conical plate 10 is arranged below the output channel 9. The collision plate I 704 and the collision plate II 804 are both fixedly connected to the housing 1.

[0029] Oil, gas and water enter the guide channel I701 from the inlet 4, collide with the diverter plate I702 and enter the diverter channel I703, merge at the collision plate I704 and collide with the collision plate I704 to enter the guide channel II801, collide with the diverter plate II802 and enter the diverter channel II803, then merge at the collision plate II804 and collide with the collision plate II804 to enter the output channel 9 and fall on the conical plate 10, gas is separated from oil and water, and oil and water finally fall into the bottom of the separation chamber 101, and oil, gas and water are subjected to multiple collisions and slow flow, so that gas is completely separated from oil and water. Diverter channel I703 and diverter channel II803 both have a certain slope, which has an accelerating effect on oil, gas and water, so that oil, gas and water have a higher speed when colliding with diverter plate I702 and diverter plate II802, and the effect of separating gas from liquid is better. The splitter plate II 802 is located below the gap between the splitter channels I 703 , so that the gas separated by collision at the splitter plate II 802 can reach the gas outlet 3 more easily.

[0030] Among them, a bottom scraper rod 11 is arranged at the bottom of the separation chamber 101, side scrapers 12 are arranged at both ends of the bottom scraper rod 11, a central shaft 13 is arranged in the middle of the bottom scraper rod 11, a motor 14 is arranged in the filter chamber 102, the output end of the motor 14 is connected to the central shaft 13, and an electric heating rod 15 is arranged on the bottom scraper rod 11. The side scrapers 12 and the electric heating rod 15 rotate with the central shaft 13 to stir the liquid in the separation chamber 101, and fully heat the liquid in the separation chamber 101 to prevent the liquid oil from condensing into oil blocks to block the pipeline. The side scrapers 12 can scrape the side wall of the separation chamber 101 to prevent the mud and sand from forming dirt on the side wall of the separation chamber 101. The bottom scraper rod 11 can clean the mud and sand at the bottom of the separation chamber 101, so that the mud and sand quickly enter the filter chamber 102 to prevent the mud and sand from accumulating at the bottom of the separation chamber 101.

[0031] Among them, a filter plate 16 is arranged directly below the water outlet Ⅰ6, and a water collecting tank 17 is arranged below the filter plate 16. The filter plate 16 is an inclined structure with the left side higher and the right side lower. The right side of the filter plate 16 is rotatably connected to the water collecting tank 17. A spring 18 is arranged on the water collecting tank 17. The left side of the filter plate 16 is elastically connected to the water collecting tank 17 through the spring 18. A bevel gear 19 is arranged on the central rotating shaft 13. The bevel gear 19 is rotatably connected with a bevel gear 20. A connecting rod 21 is arranged on the bevel gear 20. A deflection wheel 22 is arranged on the connecting rod 21. The deflection wheel 22 is connected with the filter plate 16. A water outlet Ⅱ 23 is arranged below the water collecting tank 17. The bevel gear 19 cooperates with the bevel gear 20 so that the deflection wheel 22 rotates with the rotation of the central rotating shaft 13. The filter plate 16 vibrates with the rotation of the deflection wheel 22, thereby shaking off the sediment on the filter plate 16 to prevent sediment from accumulating on the filter plate 16.

[0032] A dirt collecting box 24 is provided on the right side of the water collecting tank 17, a sewage discharge channel 25 is provided on the right side of the filter chamber 102, and a sealing window 26 is provided on the sewage discharge channel 25. At regular intervals, the staff can open the sealing window 26 to clean and replace the sewage collecting box 24, and the filter plate 16 can be cleaned without disassembling the device.

[0033] The top of the central rotating shaft 13 is connected to the conical plate 10, and the top of the electric heating rod 15 is connected to the conical plate 10. The conical plate 10 rotates with the central rotating shaft 13, and the effect of separating gas is better when oil, gas and water fall on the conical plate 10, so that gas and oil and water are completely separated.

[0034] The transmission ratio between the bevel gear 19 and the bevel gear 20 is small, that is, the bevel gear 19 has more teeth than the bevel gear 20 , so that when the central shaft 13 rotates slowly, the deflection wheel 22 can rotate quickly to vibrate the filter plate 16 .

[0035] Among them, a guide groove 27 is provided on the right side of the water collection tank 17, a guide protrusion 28 is provided on the left side of the dirt collection box 24, the guide groove 27 cooperates with the guide protrusion 28, and a handle 29 is provided on the dirt collection box 24. It is convenient for the staff to replace the dirt collection box 24. After the guide protrusion 28 cooperates with the guide groove 27, the sand vibrated by the filter plate 16 can be shaken off into the dirt collection box 24.

[0036] A partition plate 30 is provided between the motor 14 and the water collecting tank 17 to separate the filter plate 16 from the motor 14 .

[0037] Working principle:

[0038] Oil, gas and water enter the guide channel I701 from the inlet 4, collide with the diverter plate I702 and enter the diverter channel I703, merge at the collision plate I704 and collide with the collision plate I704 to enter the guide channel II801, collide with the diverter plate II802 and enter the diverter channel II803, then merge at the collision plate II804 and collide with the collision plate II804 to enter the output channel 9 and fall on the conical plate 10. During the multiple collisions and slow flow of the oil, gas and water in the first separation layer 7 and the second separation layer 8, the gas is separated from the oil and water. The conical plate 10 rotates with the central shaft 13 to separate the gas from the oil and water. Through multiple separations of the first separation layer 7, the second separation layer 8 and the conical plate 10, the gas is completely separated from the oil and water. After separation, the gas rises into the gas outlet 3 for collection, and the oil and water are separated below the conical plate 10. The separated oil is pumped out through the oil outlet 5, and the separated water and sediment sink to the filter chamber 102 through the water outlet I6.

[0039] During the separation process, the side scraper 12 and the electric heating rod 15 rotate to stir the liquid in the separation chamber 101, fully heat the liquid in the separation chamber 101, and prevent the liquid oil from condensing into oil blocks to block the pipeline. The side scraper 12 can scrape the side wall of the separation chamber 101 to prevent the mud and sand from adhering to the side wall of the separation chamber 101 to form dirt. The bottom scraper 11 can clean the mud and sand at the bottom of the separation chamber 101, so that the mud and sand quickly enter the filter chamber 102, and prevent the mud and sand from accumulating at the bottom of the separation chamber 101. The water containing mud and sand is filtered by the filter plate 16 in the filter chamber 102, and the filtered water is discharged from the water outlet II 23. The central shaft 13 at the output end of the motor 14 rotates to drive the bevel gear 19 to rotate, and the bevel gear 20 matched with the bevel gear 19 drives the deflection wheel 22 at the end of the connecting rod 21 to rotate. The rotation of the deflection wheel 22 cooperates with the spring 18 to realize the reciprocating vibration of the filter plate 16, so that the mud and sand on the filter plate 16 are shaken off into the dirt collecting box 24. At regular intervals, the staff can open the sealing window 26 to clean and replace the dirt collecting box 24 in the sewage discharge channel 25, and the filter plate 16 can be cleaned without disassembling the device.

[0040] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inner”, “outer”, “top”, and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. An oil, gas and water three-phase separation device for oil wells, characterized by: The invention comprises a shell (1) and a bottom plate (2), wherein the bottom plate (2) divides the interior of the shell (1) into two parts: a separation chamber (101) and a filter chamber (102); an air outlet (3) is arranged at the top of the shell (1); an inlet (4) is arranged at the left side of the separation chamber (101); an oil outlet (5) is arranged at the right side of the separation chamber (101); a water outlet I (6) is arranged at the bottom of the separation chamber (101); a first separation layer (7) and a second separation layer (8) are arranged inside the separation chamber (101); the first separation layer (7) comprises a guide channel I (701), a diverter plate I (702), a diverter channel I (703) and a collision plate I (704); the diverter channel I (703) is connected to the collision plate I (704) at a position where the diverter channel I (703) is connected to the collision plate I (704); The guide channel I (701) is connected to the inlet (4), the second separation layer (8) includes a guide channel II (801), a diverter plate II (802), a diverter channel II (803) and a collision plate II, the guide channel II (801) is connected to the collision plate I (704), the diverter channel II (803) is merged at the connection with the collision plate II, the diverter plate II (802) is located below the gap between the diverter channels I (703), the collision plate II is connected to the output channel (9), the diverter channel I (703) and the diverter channel II (803) both have a certain slope, a conical plate (10) is arranged below the output channel (9), and the collision plate I (704) and the collision plate II are both fixedly connected to the shell (1).

2. The oil-gas-water three-phase separation device for oil wells according to claim 1, characterized in that: A bottom scraper rod (11) is arranged at the bottom of the separation chamber (101), side scrapers (12) are arranged at both ends of the bottom scraper rod (11), a central rotating shaft (13) is arranged in the middle of the bottom scraper rod (11), a motor (14) is arranged in the filter chamber (102), an output end of the motor (14) is connected to the central rotating shaft (13), and a plurality of electric heating rods (15) are arranged on the bottom scraper rod (11).

3. The oil-gas-water three-phase separation device for oil wells according to claim 1, characterized in that: A filter plate (16) is arranged directly below the water outlet I (6), and a water collecting trough (17) is arranged below the filter plate (16). The filter plate (16) is an inclined structure with the left side higher than the right side. The right side of the filter plate (16) is rotatably connected to the water collecting trough (17). The water collecting trough (17) is provided with a spring (18). The left side of the filter plate (16) is elastically connected to the water collecting trough (17) through the spring (18). A bevel gear (19) is arranged on the central rotating shaft (13). The bevel gear (19) is rotatably connected to a bevel gear (20). A connecting rod (21) is arranged on the connecting rod (21). A deflection wheel (22) is arranged on the connecting rod (21). The deflection wheel (22) is cooperatively connected to the filter plate (16). A water outlet II (23) is arranged below the water collecting trough (17).

4. The oil-gas-water three-phase separation device for oil wells according to claim 3, characterized in that: A dirt collection box (24) is provided on the right side of the water collection tank (17), a dirt discharge channel (25) is provided on the right side of the filter chamber (102), and a sealing window (26) is provided on the dirt discharge channel (25).

5. The oil-gas-water three-phase separation device for oil wells according to claim 2, characterized in that: The top end of the central rotating shaft (13) is connected to the conical plate (10), and the top end of the electric heating rod (15) is connected to the conical plate (10).

6. The oil-gas-water three-phase separation device for oil wells according to claim 3, characterized in that: The transmission ratio between the bevel gear (19) and the bevel gear (20) is small, that is, the number of teeth of the bevel gear (19) is greater than the number of teeth of the bevel gear (20), so that when the central shaft (13) rotates slowly, the deflection wheel (22) can rotate quickly to cause the filter plate (16) to vibrate.

7. The oil-gas-water three-phase separation device for oil wells according to claim 3, characterized in that: A guide groove (27) is provided on the right side of the water collecting tank (17), a guide protrusion (28) is provided on the left side of the dirt collecting box (24), the guide groove (27) matches the guide protrusion (28), and a handle (29) is provided on the dirt collecting box (24).

8. The oil-gas-water three-phase separation device for oil wells according to claim 1, characterized in that: A partition plate (30) is provided between the motor (14) and the water collecting tank (17).

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