Novel efficient oil-gas-water-sand four-phase medium intelligent separation equipment
By introducing cyclone separation and distributed detection devices into the oil-gas-water-sand static separation chamber, combined with vacuum compression and ultra-high frequency electro-dehydration devices, the problem of insufficient oil-water interface detection was solved, the separation efficiency and oil well production were improved, the influence of electrode short circuit and sediment layer was prevented, and a stable and efficient separation effect was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-04-03
AI Technical Summary
The lack of effective oil-water interface detection and control equipment in the existing technology leads to frequent short circuits of the electrode plates. In order to maintain the internal pressure of the three-phase separator, gas separation is imperfect, oil-water emulsification is serious, wellhead back pressure is high, and oil well production is reduced.
The system employs an oil-gas-water-sand settling separation chamber, a cyclone separator, a stratified distributed oil-water detection device, a vacuum compression device, a stratified control ultra-high frequency electro-dehydration device, a control center module, and a monitoring system platform. The stratified distributed oil-water detection device monitors the oil-water interface in real time, the ultra-high frequency electro-dehydration device is precisely controlled, and the vacuum compression device maintains a slight negative pressure operation to reduce settling time and prevent the sediment layer from becoming too thick.
It improved the separation efficiency of oil, gas, water and sand, reduced wellhead back pressure, increased oil well production, prevented electrode short circuits and the influence of mud and sand layers, and achieved stable separation effect and energy saving.
Smart Images
Figure CN224079126U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of four-phase separation technology of oil, gas, water and sand in oilfield production process, and specifically relates to a new type of high-efficiency intelligent separation equipment for four-phase media of oil, gas, water and sand. Background Technology
[0002] As oil development enters the high water-cut stage, the requirements for four-phase separation of oil, water, gas, and sand in high water-cut oilfields are becoming increasingly stringent. Traditional separation methods mainly use three-phase separators, employing a static separation method, which results in low separation efficiency. As the water content of the incoming fluid increases, the required static time becomes longer, and the separation effect deteriorates further. The horizontal structure of the three-phase separator prevents sediment from accumulating, and the sediment layer cannot be treated in time, leading to an increasingly thick sediment layer that further affects the separation effect. To improve the separation effect, high-frequency electro-dehydration components are usually used in three-phase separators, but there is a lack of effective oil-water interface detection and control equipment, frequently resulting in electrode short circuits. At the same time, to maintain water and liquid levels, the internal pressure of the three-phase separator needs to be maintained, leading to incomplete gas separation. If the internal pressure is reduced, a large amount of gas overflows, which will cause further emulsification of oil and water, reducing the static separation effect and even causing separation failure. The internal pressure will also lead to high wellhead back pressure, reducing oil well production. Therefore, a new type of high-efficiency intelligent separation equipment for four-phase media of oil, gas, water, and sand is proposed. Utility Model Content
[0003] The purpose of this invention is to provide a novel, highly efficient intelligent separation equipment for four-phase media (oil, gas, water, and sand) to solve the problems of the lack of effective oil-water interface detection and control devices in the existing technology, frequent short circuits of the electrode plates, and the need to maintain the internal pressure of the three-phase separator to ensure water and liquid levels, which leads to incomplete gas separation. If the internal pressure is reduced, a large amount of gas will overflow, which will cause further emulsification of oil and water, reduce the static separation effect, or even lead to a situation where separation is impossible. The internal pressure will also lead to high wellhead back pressure, reducing oil well production.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A novel and efficient intelligent separation equipment for four-phase media of oil, gas, water and sand includes an oil, gas, water and sand static separation chamber, a cyclone separator, a layered distributed oil-water detection device, a vacuum compression device, a layered control ultra-high frequency electro-dehydration device, a control center module, a monitoring system platform and a pressure transmitter.
[0006] The oil-gas-water-sand settling separation chamber body includes an oil chamber, a water outlet anti-disturbance baffle, a conical sediment collector, and a separated natural gas outlet. A gas-liquid accumulator is installed on the top of the oil-gas-water-sand settling separation chamber body. An oil outlet regulating valve and an oil outlet are connected to the bottom of the oil chamber body. A water outlet regulating valve and a water outlet are connected to the bottom side of the oil-gas-water-sand settling separation chamber body. A sediment outlet electric valve and a sediment outlet are connected to the bottom of the oil-gas-water-sand settling separation chamber body. Multi-layer electrode plates are installed in the middle and upper parts of the oil-gas-water-sand settling separation chamber body.
[0007] The cyclone separator includes a liquid inlet, a cyclone gas outlet, a cyclone oil outlet, a cyclone cone structure, and a cyclone rotating component. The liquid inlet extends through the outer wall of the oil-gas-water-sand settling separation chamber and into the interior of the cyclone separator. The cyclone gas outlet is located at the top of the cyclone separator, the cyclone oil outlet is located on one side of the cyclone gas outlet, and the cyclone rotating component is located inside the cyclone separator. The oil outlet is located on the bottom outer side of the cyclone separator.
[0008] The layered distributed oil-water detection device includes multiple oil-water detection sensors and temperature detection sensors. The oil-water detection sensors are arranged continuously from the top to the bottom of the oil-gas-water-sand settling separation chamber, while the temperature detection sensors are arranged at intervals from the top to the bottom of the oil-gas-water-sand settling separation chamber.
[0009] Preferably, the electrode plate is connected to the layered control ultra-high frequency electro-dehydration device via a power cable, the layered control ultra-high frequency electro-dehydration device is connected to the control center module via a signal cable, the control center module is connected to the monitoring system platform via a communication cable, the pressure transmitter is connected to the control center module via a signal cable, the layered distributed oil-water detection device is connected to the control center module via a signal cable, and the oil outlet regulating valve, water outlet regulating valve, and sediment outlet electric valve are connected to the control center module via control cables.
[0010] Preferably, the water outlet anti-disturbance baffle and the conical sediment collector are both located at the bottom of the oil-gas-water-sand settling separation chamber.
[0011] Preferably, the top of the oil-gas-water-sand settling separation chamber is provided with a natural gas separation outlet, which is connected to the vacuum compression device.
[0012] Preferably, the vacuum compression device adjusts the compression frequency in real time through the pressure transmitter to ensure that the top of the oil, gas, water and sand settling separation chamber is under slight negative pressure, which accelerates gas separation, reduces wellhead back pressure, and increases oil well production.
[0013] Preferably, the layered distributed oil-water detection device is installed on the top of the oil-gas-water-sand settling separation chamber body, the pressure transmitter is installed on the top of the oil-gas-water-sand settling separation chamber body, and the cyclone separator is installed inside the oil-gas-water-sand settling separation chamber body.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This invention employs a cyclone separator for primary separation of the incoming liquid, enabling rapid separation of oil, gas, water, and sediment. The separated gas enters the top layer of the equipment, forming a gas chamber. The separated light, low-water-content oil enters the middle layer of the equipment from the oil outlet, while the separated heavy water and sediment overflow from the bottom water outlet and enter the bottom layer, creating a four-phase region of gas, oil, water, and sediment and reducing internal disturbances, significantly shortening the settling time. The bottom of the oil-gas-water-sand settling chamber features a conical structure to facilitate sediment accumulation and collection. A layered distributed oil-water detection device can detect the sediment thickness. When the thickness reaches a set value, the monitoring system platform notifies sediment removal personnel to open the electric valve for direct loading, ensuring no sediment touches the ground and achieving inherent safety and environmental protection. Simultaneously, it prevents excessively thick sediment layers from affecting the oil-water settling separation effect. The control center module, based on the layered distributed oil... The data collected by the water detection device controls the oil-water interface position through a regulating valve. Based on the water content of the emulsion layer and oil layer, it issues commands to the stratified control ultra-high frequency electro-dehydration device, activating the control parameters of the ultra-high frequency control generator unit to ensure the safe operation of the ultra-high frequency electro-dehydration device and prevent electrode plate short-circuit faults. The ultra-high frequency is adjusted according to different water contents to improve the oil-water separation efficiency of electro-dehydration. Precise control of frequency and power saves energy and reduces consumption. The vacuum compression device controls the gas phase pressure to operate under a slightly negative pressure condition based on the gas phase pressure, improving gas separation efficiency, reducing liquid phase pressure, improving oil-water separation effect, reducing energy consumption, and simultaneously reducing wellhead back pressure to increase oil well production. The stratified distributed oil-water detection device can monitor changes in oil-water separation in real time and adjust the oil-water interface and ultra-high frequency electro-dehydration device parameters in real time to ensure optimal equipment separation efficiency.
[0016] In summary, the coordinated operation of various devices can improve the separation efficiency of oil, gas, water, and sand. The use of a vacuum compression device reduces wellhead back pressure, increasing oil well production. The layered distributed oil-water detection device can monitor the interface position and oil-water content changes of the oil, gas, water, and sand within the equipment in real time. These changes and interface positions allow for precise control of the layered ultra-high frequency electro-dehydration device, improving its dehydration efficiency, preventing short circuits and breakdowns of the electro-dehydration plates, and enabling real-time valve adjustment to control water level, liquid level, and sand layer thickness, ensuring stable operation of the separation equipment. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the equipment structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the cyclone separation device in the equipment of this utility model.
[0019] Figure 3 This is a schematic diagram of the sensor arrangement of the layered distributed oil-water detection device in the equipment of this utility model.
[0020] In the diagram: 1. Main body of oil-gas-water-sand static separation chamber; 2. Cyclone separator; 3. Layered distributed oil-water detection device; 4. Vacuum compression device; 5. Layered control ultra-high frequency electro-dehydration device; 6. Control center module; 7. Monitoring system platform; 8. Pressure transmitter; 9. Oil chamber; 10. Water outlet anti-disturbance baffle; 11. Electrode plate; 12. Oil outlet regulating valve; 13. Water outlet regulating valve; 14. Sediment outlet electric valve; 15. Inlet liquid; 16. Separated natural gas outlet; 17. Oil outlet; 18. Water outlet; 19. Sediment outlet; 20. Sediment accumulator; 21. Emulsified oil layer zone; 22. Crude oil layer zone; 23. Water layer zone; 24. Gas-liquid accumulator; 25. Cyclone gas outlet; 26. Cyclone rotating component; 27. Cyclone oil outlet; 28. Cyclone water outlet; 29. Cyclone cone structure; 30. Oil-water detection sensor; 31. Temperature detection sensor. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0022] like Figure 1-3 As shown, a novel and efficient intelligent separation equipment for four-phase media of oil, gas, water and sand includes an oil, gas, water and sand static separation chamber body 1, a cyclone separation device 2, a layered distributed oil-water detection device 3, a vacuum compression device 4, a layered control ultra-high frequency electric dehydration device 5, a control center module 6, a monitoring system platform 7 and a pressure transmitter 8.
[0023] like Figure 1-3As shown, the oil-gas-water-sand settling separation chamber body 1 includes an oil chamber 9, a water outlet anti-disturbance baffle 10, a conical sediment collector 20, and a separated natural gas outlet 16. A gas-liquid collector 24 is provided on the top of the oil-gas-water-sand settling separation chamber body 1. An oil outlet regulating valve 12 and an oil outlet 17 are connected to the bottom of the oil chamber 9. A water outlet regulating valve 13 and a water outlet 18 are connected to the bottom side of the oil-gas-water-sand settling separation chamber body 1. A sediment outlet electric valve 14 and a sediment outlet 19 are connected to the bottom of the oil-gas-water-sand settling separation chamber body 1. Multi-layer electrode plates 11 are installed in the middle and upper parts of the oil-gas-water-sand settling separation chamber body 1.
[0024] like Figure 1-3 As shown, the cyclone separator 2 includes a liquid inlet 15, a cyclone gas outlet 25, a cyclone oil outlet 27, a cyclone cone structure 29, and a cyclone rotating component 26. The liquid inlet 15 extends through the outer wall of the oil-gas-water-sand settling separation chamber body 1 into the interior of the cyclone separator 2. The cyclone gas outlet 25 is located at the top of the cyclone separator 2, the cyclone oil outlet 27 is located on one side of the cyclone gas outlet 25, the cyclone rotating component 26 is located inside the cyclone separator 2, and the cyclone 29 is located on the outer side of the bottom of the cyclone separator 2.
[0025] like Figure 1-3 As shown, the layered distributed oil-water detection device 3 includes multiple oil-water detection sensors 30 and temperature detection sensors 31. The oil-water detection sensors 30 are arranged continuously from the top to the bottom of the oil-gas-water-sand settling separation chamber body 1, and the temperature detection sensors 31 are arranged at intervals from the top to the bottom of the oil-gas-water-sand settling separation chamber body 1.
[0026] In further detail, the electrode plate 11 is connected to the layered control ultra-high frequency electro-dehydration device 5 via a power cable. The layered control ultra-high frequency electro-dehydration device 5 is connected to the control center module 6 via a signal cable. The control center module 6 is connected to the monitoring system platform 7 via a communication cable. The pressure transmitter 8 is connected to the control center module 6 via a signal cable. The layered distributed oil-water detection device 3 is connected to the control center module 6 via a signal cable. The oil outlet regulating valve 12, the water outlet regulating valve 13, and the sediment outlet electric valve 14 are connected to the control center module 6 via control cables.
[0027] As can be seen from the above, the process of entering the crude oil tank area through the oil outlet 17 can effectively prevent the oil-water separation disturbance caused by the oil outlet disturbance and improve the separation efficiency. The water separated from the water layer 23 enters the sewage tank area through the water outlet 18 from the bottom of the water outlet anti-disturbance baffle 10. This process can effectively avoid the oil-water separation disturbance caused by the sewage outlet disturbance and improve the separation efficiency.
[0028] This utility model is further described in detail as follows: the water outlet anti-disturbance baffle 10 and the conical sediment accumulator 20 are both located at the bottom of the oil-gas-water-sand settling separation chamber body 1. The top of the oil-gas-water-sand settling separation chamber body 1 is provided with a natural gas separation outlet 16, which is connected to the vacuum compression device 4. The vacuum compression device 3 adjusts the compression frequency in real time through the pressure transmitter 8 to ensure that the top of the oil-gas-water-sand settling separation chamber body 1 is under a slight negative pressure, which accelerates the rapid separation of gas, reduces the wellhead back pressure, and increases the oil well production. The layered distributed oil-water detection device 3 is installed on the top of the oil-gas-water-sand settling separation chamber body 1, the pressure transmitter 8 is installed on the top of the oil-gas-water-sand settling separation chamber body 1, and the cyclone separator 2 is installed inside the oil-gas-water-sand settling separation chamber body 1.
[0029] It should be noted that the distance between the multiple oil and water detection sensors 30 is 2.5cm, and the distance between the multiple temperature detection sensors 31 is 20cm.
[0030] As can be seen from the above, the oil-water detection sensor 30 and the temperature detection sensor 31 can detect parameters such as oil-water content, temperature, liquid level, oil-water interface, sediment thickness, emulsion layer thickness, emulsion layer position, and real-time changes in water content in real time, and transmit the data to the control center module 6. The control center module 6 controls the ultra-high frequency electro-dehydration device 5 to activate the electrode plates in the corresponding areas and emit ultra-high frequency signals based on the emulsion layer thickness and emulsion layer position transmitted by the layered distributed oil-water detection device 3.
[0031] The electric field improves the efficiency of emulsified oil separation, prevents short-circuit breakdown of electrode plate 11, and precisely controls energy consumption. The control center module 6, based on the silt thickness signal from the silt accumulator 3 transmitted by the layered distributed oil-water detection device 3, notifies the silt cleaning management personnel and controls the silt outlet electric valve 14 to open the silt discharge function. This ensures timely silt removal, preventing silt caking and difficulty in cleaning due to excessive silt thickness, and also preventing substandard wastewater discharge caused by excessive silt thickness. This reduces silt accumulation in subsequent processes. The control center module 6, based on the liquid level and oil temperature signals transmitted by the layered distributed oil-water detection device 3... The real-time adjustment of the water interface data by the oil outlet regulating valve 12 and water outlet regulating valve 13 stabilizes the oil and water output rates, preventing disturbances at the oil-water interface and improving oil-water separation efficiency. This prevents the liquid level in oil chamber 9 from becoming too low, prevents the liquid level inside the oil-gas-water-sand settling separation chamber 1 from continuously rising and overflowing from the natural gas outlet 16, and prevents a full-water short circuit between the two electrode plates 11. The control center module 6 adjusts the power and frequency applied to the electrode plates 11 by the layered control ultra-high frequency electro-dehydration device 5 in real-time based on the real-time changes in water content transmitted by the layered distributed oil-water detection device 3, reducing... Low energy consumption and improved separation efficiency: The control center module 6 collects data from the pressure transmitter 8 and adjusts the compression speed of the vacuum compression device 4 based on the data. This ensures that the gas area at the top of the oil-gas-water-sand settling separation chamber 1 is under a slight negative pressure, allowing dissolved gas in the incoming liquid to overflow quickly and reducing its impact on oil-water separation. Simultaneously, it reduces wellhead back pressure and increases oil well production. The gas-liquid separator 24 at the top of the oil-gas-water-sand settling separation chamber 1 effectively blocks liquids carried by natural gas. Simulating the impact of liquids on the vacuum compression device 3, the cyclone separator 2 is equipped with a cyclone separator. Component 26 and the vortex cone structure 29 cause the liquid entering the device to undergo vortexing. Heavy water and sand flow out from the vortex water outlet 28, while light gas and oil overflow from the vortex gas outlet 25 and the vortex oil outlet 27. The water and sand flowing out from the vortex water outlet 28 enter the water layer zone 23, and the sediment settles in the sediment collector 20. The gas overflowing from the vortex gas outlet 25 enters the gas phase space at the top of the oil-gas-water-sand settling separation chamber 1, and enters the vacuum compression device from the separated natural gas outlet 16 through the gas-liquid condenser 24. The oil overflowing from the vortex oil outlet 27 enters the emulsified oil layer zone 21 and the crude oil layer zone 22.
[0032] In summary, the various devices work together to improve the separation efficiency of oil, gas, water, and sand. The vacuum compression device 4 reduces wellhead back pressure, increasing oil well production. The layered distributed oil-water detection device 3 can monitor the interface position and oil-water content changes of oil, gas, water, and sand within the equipment in real time. These changes and interface positions allow for precise control of the layered control ultra-high frequency electro-dehydration device 5, improving its dehydration efficiency and preventing short circuits and breakdowns of the electro-dehydration plates. Simultaneously, valves can be adjusted in real time to control water level, liquid level, and sand layer thickness, ensuring stable operation of the separation equipment.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A novel and efficient oil-gas-water-sand four-phase medium intelligent separation equipment, characterized in that, It comprises oil gas water sand static separation chamber body (1), cyclone separation device (2), layered distributed oil water detection device (3), vacuum compression device (4), layered control ultrahigh frequency electric dehydration device (5), control center module (6), monitoring system platform (7) and pressure transmitter (8); The oil gas water sand static separation chamber body (1) comprises oil chamber (9), water outlet anti disturbance baffle (10), conical sand accumulator (20) and separated natural gas outlet (16), the top of the oil gas water sand static separation chamber body (1) is provided with gas volume liquid device (24), the bottom of the oil chamber (9) is connected with oil outlet regulating valve (12) and oil outlet (17), the bottom side of the oil gas water sand static separation chamber body (1) is connected with water outlet regulating valve (13) and water outlet (18), the bottom of the oil gas water sand static separation chamber body (1) is connected with sand outlet electric valve (14) and sand outlet (19), the middle and upper part of the oil gas water sand static separation chamber body (1) is installed with multilayer electrode plate (11); The cyclone separation device (2) comprises liquid inlet (15), spin-off gas outlet (25), spin-off oil outlet (27), spin-off cone angle structure (29) and spin-off rotating part (26), the liquid inlet (15) extends through the outer wall of the oil gas water sand static separation chamber body (1) to the inside of the cyclone separation device (2), the spin-off gas outlet (25) is arranged at the top of the cyclone separation device (2), the spin-off oil outlet (27) is arranged on one side of the spin-off gas outlet (25), the spin-off rotating part (26) is located in the inside of the cyclone separation device (2), and the (29) is located at the bottom outside of the cyclone separation device (2); The layered distributed oil water detection device (3) comprises a plurality of oil water detection sensors (30) and temperature detection sensors (31), the oil water detection sensors (30) are arranged continuously from the top to the bottom of the oil gas water sand static separation chamber body (1), and the temperature detection sensors (31) are arranged at intervals from the top to the bottom of the oil gas water sand static separation chamber body (1).
2. The novel and efficient oil-gas-water-sand four-phase medium intelligent separation equipment according to claim 1, characterized in that: The electrode plate (11) is connected with the layered control ultrahigh frequency electric dehydration device (5) through power cable, the layered control ultrahigh frequency electric dehydration device (5) is connected with the control center module (6) through signal cable, the control center module (6) is connected with the monitoring system platform (7) through communication cable, the pressure transmitter (8) is connected with the control center module (6) through signal cable, the layered distributed oil water detection device (3) is connected with the control center module (6) through signal cable, and the oil outlet regulating valve (12), the water outlet regulating valve (13) and the sand outlet electric valve (14) are connected with the control center module (6) through control cable.
3. The novel and efficient oil-gas-water-sand four-phase medium intelligent separation equipment according to claim 1, characterized in that: The water outlet anti disturbance baffle (10) and the conical sand accumulator (20) are arranged at the bottom of the oil gas water sand static separation chamber body (1).
4. The novel and efficient oil-gas-water-sand four-phase medium intelligent separation equipment according to claim 1, characterized in that: The oil-gas-water-sand static separation chamber body (1) is provided with a separation natural gas outlet (16) at the top, which is connected with the vacuum compression device (4).
5. The novel and efficient oil-gas-water-sand four-phase medium intelligent separation equipment according to claim 1, characterized in that: The vacuum compression device (4) adjusts the compression frequency in real time through the pressure transmitter (8).
6. The novel and efficient oil-gas-water-sand four-phase medium intelligent separation equipment according to claim 1, characterized in that: The layered distributed oil-water detection device (3) is installed at the top of the oil-gas-water-sand static separation chamber body (1), the pressure transmitter (8) is installed at the top of the oil-gas-water-sand static separation chamber body (1), and the cyclone separation device (2) is installed inside the oil-gas-water-sand static separation chamber body (1).