Multi-phase flowmeter for virtual metering of oil and gas production

Abstract

The utility model discloses a multi-phase flowmeter for oil gas production virtual metering, which comprises a gas-liquid separation cylinder, a filter box, a gas phase flowmeter and a mass flowmeter, the upper side of the filter box is in sliding connection with a cover plate, the upper side of the cover plate is fixedly connected with a liquid inlet pipe, a filter screen is arranged outside an inclined plate, a driving motor is arranged outside the filter box, and the liquid inlet pipe is fixedly connected with the liquid inlet pipe. A dredging mechanism is installed in the filter box, an oil pump is fixedly connected to the interior of the filter box, an oil pipe is fixedly connected to the exterior of the oil pump, exhaust pipelines are fixedly connected to the two sides of the gas phase flow meter, and liquid drainage pipelines are fixedly connected to the two sides of the mass flow meter. According to the device, pre-filtering preparation work can be conducted before oil-gas separation is conducted on petroleum, it can be guaranteed that the pre-filtering preparation work of the petroleum can be conducted smoothly, gas-liquid separation is conducted through gravity, analysis and calculation are conducted through cooperation of the gas phase flow meter and the mass flow meter, and then the oil content, the water content and the gas content of the petroleum produced by a mine can be analyzed; and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of multiphase flowmeters, in particular to a multiphase flowmeter for virtual metering of oil and gas production. Background Art

[0002] In the oil and gas production industry, accurate measurement and analysis of oil produced from mines is crucial. Traditional oil and gas production metering systems often directly perform gas-liquid separation and flow measurement on untreated oil. This can not only damage pipelines due to the intrusion of ore and gravel, but also affect metering accuracy due to the presence of impurities. Furthermore, long-term operation of the filtration system can easily lead to clogged pores, reducing filtration efficiency and thus affecting the smooth operation of the entire production process.

[0003] In the existing technology, fixed filters are often used for preliminary filtration to treat impurities in petroleum. However, after long-term operation, the accumulation of blockages on the filter will significantly increase maintenance costs and downtime. At the same time, in the gas-liquid separation and flow measurement links, traditional systems often rely on a single flow meter, which makes it difficult to simultaneously achieve accurate measurement and analysis of the three phases of oil, water, and gas. Especially under the dynamic changes of the oil-water ratio in the oil-water mixture, traditional methods often have the problem of insufficient measurement accuracy. Therefore, in response to the above technical problems, a multiphase flowmeter for virtual metering of oil and gas production is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a multiphase flowmeter for virtual metering of oil and gas production, which can perform pre-filtration preparation work before oil and gas separation, and can also ensure that the pre-filtration preparation work of the oil can be carried out smoothly, and perform gas-liquid separation by gravity. Through the analysis and calculation of the gas phase flowmeter and the mass flowmeter, the oil, water and gas content of the oil produced in the mine can be analyzed, which is more convenient.

[0005] The utility model is achieved through the following technical solutions:

[0006] and a tube connecting the dischar e side of the pump with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former

[0007] Preferably, the dredging mechanism includes a rotating plate, a spring, a vibrating rod, a rotating rod and a convex plate. The rotating plate is rotatably connected to the inside of the filter box. The upper side of the rotating plate is fixedly connected to the spring and the vibrating rod. The end of the spring is fixedly connected to the lower side of the inclined plate, and the end of the vibrating rod is close to the lower side of the filter screen.

[0008] Preferably, the rotating rod is rotatably connected to the inside of the filter box, and the rotating rod is fixedly connected to the drive motor. The convex plate is fixedly connected to the outside of the rotating rod, and the convex plate abuts against the rotating plate.

[0009] Preferably, a liquid level sensor is fixedly connected to the interior of the gas-liquid separation cylinder, and the height of the liquid level sensor corresponds to the height of the oil pipe extending into the gas-liquid separation cylinder.

[0010] Preferably, the exhaust pipe is fixedly connected to the upper surface of the gas-liquid separation cylinder, and the mass flow meter is fixedly connected to the lower surface of the gas-liquid separation cylinder.

[0011] Preferably, a valve is fixedly connected to the outside of the discharge pipe, and the valve is located on both sides of the mass flow meter.

[0012] Preferably, an exhaust port and a liquid drain port are fixedly connected to the outside of the transfer box, and the exhaust port is located above the liquid drain port.

[0013] The technical solution of the utility model has at least the following beneficial effects:

[0014] 1. This multiphase flowmeter for virtual metering in oil and gas production uses a filter box with a vibrating filter to pre-filter the oil before it enters the gas-liquid separation cylinder, effectively removing impurities such as ore and gravel from the oil and protecting the safety of subsequent pipelines. At the same time, a vibration mechanism driven by a drive motor is introduced to regularly vibrate and clean the filter to prevent filter pores from clogging, ensuring the stability and sustainability of filtration efficiency.

[0015] 2. This multiphase flowmeter for virtual metering in oil and gas production uses gravity to naturally raise the gas in the oil to the top of the gas-liquid separation cylinder during the gas-liquid separation stage, while the oil-water mixture settles to the bottom. The gas discharged from the top is measured by the gas phase flowmeter, and the mass flowmeter is used to accurately analyze the mass flow rate and oil-water ratio of the discharged oil-water mixture, thus realizing comprehensive monitoring of the three-phase content of oil, water and gas in the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0018] Figure 3 for Figure 2 A side sectional view of

[0019] Figure 4 for Figure 3 A magnified view of middle A;

[0020] Icons: 1. Gas-liquid separation cylinder; 2. Filter box; 3. Cover plate; 4. Liquid inlet pipe; 5. Inclined plate; 6. Filter screen; 7. Rotating plate; 8. Spring; 9. Vibrating rod; 10. Drive motor; 11. Rotating rod; 12. Convex plate; 13. Oil pump; 14. Oil pipe; 15. Liquid level sensor; 16. Gas flowmeter; 17. Exhaust pipe; 18. Mass flowmeter; 19. Drain pipe; 20. Valve; 21. Transfer box; 22. Exhaust port; 23. Drain port. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] See also Figure 1-4The utility model proposes a multiphase flowmeter for virtual metering of oil and gas production, including a gas-liquid separation cylinder 1, a filter box 2, a gas phase flowmeter 16 and a mass flowmeter 18. The gas phase flowmeter 16 is installed on the upper side of the gas-liquid separation cylinder 1, and the mass flowmeter 18 is installed on the lower side of the gas-liquid separation cylinder 1. The upper side of the filter box 2 is slidably connected to a cover plate 3, and the upper side of the cover plate 3 is fixedly connected to a liquid inlet pipe 4. The interior of the filter box 2 is fixedly connected to an inclined plate 5, and a filter screen 6 is provided on the outside of the inclined plate 5. A drive motor 10 is provided on the outside of the filter box 2, and a dredging mechanism is installed inside the filter box 2.

[0024] The dredging mechanism includes a rotating plate 7, a spring 8, a vibrating rod 9, a rotating rod 11 and a convex plate 12. The rotating plate 7 is rotatably connected to the inside of the filter box 2. The upper side of the rotating plate 7 is fixedly connected to the spring 8 and the vibrating rod 9. The end of the spring 8 is fixedly connected to the lower side of the inclined plate 5. The spring 8 is connected to the bottom of the inclined plate to facilitate it to drive the vibrating rod 9 to rebound and reset. The end of the vibrating rod 9 is close to the lower side of the filter screen 6, which makes it easier for the vibrating rod 9 to hit the filter screen and cause it to vibrate.

[0025] The rotating rod 11 is rotatably connected to the inside of the filter box 2, and the rotating rod 11 is fixedly connected to the driving motor 10. The driving motor 10 can drive the rotating rod 11 to rotate. The convex plate 12 is fixedly connected to the outside of the rotating rod 11, and the convex plate 12 is in contact with the rotating plate 7.

[0026] The working principle of an asphalt mixture stirring device based on the first embodiment is that before oil and gas separation, the oil produced by the mine can first be passed into the filter box 2 through the liquid inlet pipe 4, and the ore and gravel in the oil are filtered through the filter screen 6 to prevent it from damaging the pipeline. When the filter screen 6 is used for filtration for a long time, the filter holes of the filter screen 6 are blocked, which will affect the filtration efficiency. At this time, the driving motor 10 can be operated to make the rotating rod 11 drive the convex plate 12 to rotate. Since the convex plate 12 abuts against the rotating plate 7, the rotating plate 7 can be driven to rotate, thereby stretching the spring 8 and driving the vibration rod 9 away from the filter screen 6 until the convex plate 12 is separated from the rotating plate 7. At this time, the spring 8 will be released, thereby driving the vibration rod 9 to reset, causing it to violently hit the filter screen 6. Continuously operating the driving motor 10 can continuously drive the vibration rod 9 to hit the filter screen 6 to vibrate it, thereby clearing the blockage in the filter holes. In this way, on the one hand, pre-filtration preparation work can be carried out before oil and gas separation of the oil, and on the other hand, it can also ensure that the pre-filtration preparation work of the oil can be carried out smoothly.

[0027] Example 2

[0028] See also Figure 1Based on the first embodiment, the inside of the filter box 2 is fixedly connected to the oil pump 13, the outside of the oil pump 13 is fixedly connected to the oil pipe 14, and the end of the oil pipe 14 extends out of the filter box 2 and is fixedly connected to the outside of the gas-liquid separation cylinder 1, the two sides of the gas flowmeter 16 are fixedly connected to the exhaust pipe 17, the two sides of the mass flowmeter 18 are fixedly connected to the drainage pipe 19, the end of the exhaust pipe 17 is fixedly connected to the transfer box 21, and the transfer box 21 and the drainage pipe 19 are also fixedly connected.

[0029] A liquid level sensor 15 is fixedly connected to the interior of the gas-liquid separation cylinder 1, and the height of the liquid level sensor 15 corresponds to the height of the oil pipe 14 extending into the gas-liquid separation cylinder 1. The liquid level sensor 15 can monitor the liquid level of the oil in the gas-liquid separation cylinder 1 to avoid backflow.

[0030] The exhaust pipe 17 is fixedly connected to the upper surface of the gas-liquid separation cylinder 1 , and the mass flow meter 18 is fixedly connected to the lower surface of the gas-liquid separation cylinder 1 . Since the gas in the oil rises, the exhaust pipe is installed on the upper surface of the gas-liquid separation cylinder 1 .

[0031] A valve 20 is fixedly connected to the outside of the discharge pipe 19, and the valve 20 is located on both sides of the mass flow meter 18. The valve can be used to control the delivery of the oil-water mixture, so that the oil-water mixture can be discharged after the gas in the oil is measured and discharged.

[0032] The outside of the transfer box 21 is fixedly connected with an exhaust port 22 and a drain port 23 , and the exhaust port 22 is located above the drain port 23 . Since the gas density is low, it will rise to the top of the transfer box, so the exhaust port 22 is installed above the drain port 23 .

[0033] In this embodiment, when the oil is filtered through the filter screen 6 to the bottom of the filter box 2, it can be input into the gas-liquid separation cylinder 1 through the oil pump 13 through the oil pipe 14. At the same time, the liquid level can be monitored in real time by the liquid level sensor 15 to prevent the liquid level from being too high and causing backflow. After standing, the gas in the oil can rise to the top of the gas-liquid separation cylinder 1, and the oil-water mixture sinks to the bottom of the gas-liquid separation cylinder 1. At this time, the gas can pass through the exhaust pipe 17 and the gas flow meter 16 to measure the gas flow in the oil. After the measurement is completed, it can be input into the transfer box 21 through the exhaust pipe 17 and output from the exhaust port 22. When it is completely discharged, the valve 20 can be opened at this time, and the oil-water mixture in the petroleum can pass through the mass flowmeter 18 through the drainage pipe 19 due to gravity factors. The mass flow measurement is provided by combining the flow rate measurement and the fluid density estimation to provide the mass flow measurement, and the oil-water ratio in the oil-water mixture can be analyzed and calculated. Then it is input into the transfer box 21 through the drainage pipe 19 and output from the drainage port 23. In this way, gas-liquid separation is carried out by gravity, and the oil, water and gas content of the petroleum produced by the mine can be analyzed by means of analysis and calculation through the gas phase flowmeter 16 and the mass flowmeter 18, which is more convenient.

[0034] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multiphase flowmeter for virtual metering of oil and gas production, characterized by: The invention comprises a gas-liquid separation cylinder (1), a filter box (2), a gas phase flow meter (16) and a mass flow meter (18), wherein the gas phase flow meter (16) is installed on the upper side of the gas-liquid separation cylinder (1), and the mass flow meter (18) is installed on the lower side of the gas-liquid separation cylinder (1), the upper side of the filter box (2) is slidably connected to a cover plate (3), the upper side of the cover plate (3) is fixedly connected to a liquid inlet pipe (4), the interior of the filter box (2) is fixedly connected to an inclined plate (5), the outside of the inclined plate (5) is provided with a filter screen (6), the outside of the filter box (2) is provided with a drive motor (10), and the filter A dredging mechanism is installed inside the box (2), an oil pump (13) is fixedly connected to the inside of the filter box (2), an oil pipe (14) is fixedly connected to the outside of the oil pump (13), and the end of the oil pipe (14) extends out of the filter box (2) and is fixedly connected to the outside of the gas-liquid separation cylinder (1), an exhaust pipe (17) is fixedly connected to both sides of the gas phase flow meter (16), a drainage pipe (19) is fixedly connected to both sides of the mass flow meter (18), and a transfer box (21) is fixedly connected to the end of the exhaust pipe (17), and the transfer box (21) and the drainage pipe (19) are also fixedly connected.

2. The multiphase flowmeter for virtual metering of oil and gas production according to claim 1, characterized in that: The dredging mechanism comprises a rotating plate (7), a spring (8), a vibrating rod (9), a rotating rod (11) and a convex plate (12); the rotating plate (7) is rotatably connected to the interior of the filter box (2); the upper side of the rotating plate (7) is fixedly connected to the spring (8) and the vibrating rod (9); the end of the spring (8) is fixedly connected to the lower side of the inclined plate (5); and the end of the vibrating rod (9) is close to the lower side of the filter screen (6).

3. The multiphase flowmeter for virtual metering of oil and gas production according to claim 2, characterized in that: The rotating rod (11) is rotatably connected to the inside of the filter box (2), and the rotating rod (11) and the driving motor (10) are fixedly connected. The convex plate (12) is fixedly connected to the outside of the rotating rod (11), and the convex plate (12) and the rotating plate (7) are in contact with each other.

4. The multiphase flowmeter for virtual metering of oil and gas production according to claim 1, characterized in that: A liquid level sensor (15) is fixedly connected to the interior of the gas-liquid separation cylinder (1), and the height of the liquid level sensor (15) corresponds to the height of the oil pipe (14) extending into the gas-liquid separation cylinder (1).

5. The multiphase flowmeter for virtual metering of oil and gas production according to claim 1, characterized in that: The exhaust pipe (17) is fixedly connected to the upper surface of the gas-liquid separation cylinder (1), and the mass flow meter (18) is fixedly connected to the lower surface of the gas-liquid separation cylinder (1).

6. The multiphase flowmeter for virtual metering of oil and gas production according to claim 1, characterized in that: The outside of the liquid discharge pipe (19) is fixedly connected with a valve (20), and the valve (20) is located on both sides of the mass flow meter (18).

7. The multiphase flowmeter for virtual metering of oil and gas production according to claim 1, characterized in that: An exhaust port (22) and a liquid discharge port (23) are fixedly connected to the outside of the transfer box (21), and the exhaust port (22) is located above the liquid discharge port (23).

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