Novel oil-water-gas three-phase metering device

Abstract

The invention discloses a novel oil-water-gas three-phase metering device, and relates to the technical field of flowmeters. The device comprises an inlet flange, a separator, a liquid collecting pipe, a liquid inlet pipeline, an oil combing exhauster, a liquid flowmeter, a water content measuring instrument, a liquid outlet pipeline, a gas-liquid mixer, an outlet flange, a gas collecting pipe, a gas inlet pipeline, a gas flowmeter, a valve, a gas outlet pipeline, a signal connecting pipe and a tunnel effect anti-blocking device. The inlet flange is mounted on the side of the separator; the lower part of the separator is connected with a liquid collecting pipe; the liquid collecting pipe is connected with a liquid inlet pipeline; a tunnel effect anti-blocking device is mounted in the liquid inlet pipeline; the liquid inlet pipeline is connected with the oil combing exhauster; an upper pipeline of the oil combing exhauster is connected with a gas inlet pipeline; the rear part of the oil combing exhauster is connected with a liquid flowmeter; the rear part of the fluid flowmeter is connected with a water content measuring instrument; the rear part of the water content measuring instrument is connected with a liquid outlet pipeline; the liquid outlet pipeline is connected with the gas-liquid mixer; and the gas-liquid mixer is connected with an outlet flange.

Description

Technical Field

[0001] The invention relates to the technical field of flow meters, in particular to a novel oil-water-gas three-phase metering device. Background Art

[0002] At present, crude oil measurement has always been difficult because it contains a large amount of gas, liquid, water, impurities, and associated substances. With the refined management of the petroleum industry, the requirements for oil well production metering systems are getting higher and higher. It is urgent to solve the problem of accurate measurement of crude oil flow. Although the separator can separate a part of the liquid associated gas, the vortex and residual gas at the separator outlet affect the measurement of the liquid flow meter, resulting in a large measurement error of the liquid flow meter (the error can be as high as 10% or more in serious cases), which in turn leads to a large measurement error of the water content meter (the error can be as high as 30% or more in serious cases), resulting in a large measurement error of the traditional multiphase flow meter, which cannot meet the requirements of accurate crude oil measurement at all. At the same time, for heavy oil, due to its high viscosity, high viscosity, and low low-temperature fluidity, it has always been a difficult point in crude oil measurement. With the refined management of the petroleum industry, the requirements for oil well production metering systems are getting higher and higher. It is urgent to solve the problem of heavy oil flow measurement. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a novel oil-water-gas three-phase metering device, comprising an inlet flange, a separator, a liquid manifold, a liquid inlet pipeline, an oil combing exhauster, a liquid flow meter, a water content measuring instrument, a liquid outlet pipeline, a gas-liquid mixer, an outlet flange, a gas manifold, a gas inlet pipeline, a gas flow meter, a valve, a gas outlet pipeline, a signal connecting pipe and a tunnel effect anti-blocking device; the inlet flange is installed on the side of the separator; the lower part of the separator is connected to the liquid manifold; the liquid manifold is connected to the liquid inlet pipeline, and a tunnel effect anti-blocking device is installed inside the liquid inlet pipeline; the liquid inlet pipeline is connected to the oil combing exhauster; the upper pipeline of the oil combing exhauster is connected to the gas inlet pipeline; the rear of the oil combing exhauster is connected to the liquid flow meter; the rear of the liquid flow meter is connected to the water content measuring instrument; the rear of the water content measuring instrument is connected to the liquid outlet pipeline; the liquid outlet pipeline is connected to the gas-liquid mixer; and the gas-liquid mixer is connected to the outlet flange.

[0004] Preferably, the upper part of the separator is connected to a gas manifold, the gas manifold is connected to a gas inlet pipeline; the gas inlet pipeline is connected to a gas flow meter; the rear part of the gas flow meter is connected to a valve; the valve is connected to a gas outlet pipeline; the gas outlet pipeline is connected to a gas-liquid mixer; a signal connecting pipe is connected to a gas flow meter; a signal connecting pipe is connected to a liquid flow meter; and a signal connecting pipe is connected to a water content measuring instrument.

[0005] Preferably, the tunnel effect anti-blocking device includes a cone, which is installed at the center position inside the liquid inlet pipe; the cone is connected to the inner wall of the liquid inlet pipe through a support frame; the tunnel effect anti-blocking device is a cone and a support frame that work together to divide the liquid inlet pipe into a tunnel space, and the liquid is forced to move along the cone after passing through the cone. Due to the reduction in cross-sectional area, the flow velocity of the fluid in the tunnel space increases rapidly, forming a self-flushing effect, which prevents the medium from depositing inside the liquid inlet pipe.

[0006] Preferably, an oil combing pipe is arranged inside the shell of the oil combing exhauster; an oil and gas nozzle is arranged on the upper part of the oil combing pipe; an oil blocking net is arranged inside the upper space of the shell; the upper part of the oil blocking net is an air collecting chamber; the upper part of the air collecting chamber is connected to the gas collecting pipe; the oil combing exhauster is a shell and an oil combing pipe that work together to divide the pipeline into a balanced fluid pipeline space, the liquid is rectified through the balanced fluid pipeline space, the vortex is eliminated, and the stable liquid enters the liquid flow meter; at the same time, the contained gas is further released, the light gas is released through the oil and gas nozzle, the oil blocking net intercepts a small amount of oil and water in the gas, the gas enters the gas collecting chamber through the oil blocking net, the gas inside the gas collecting chamber is connected to the gas inlet pipeline through the gas collecting pipe, and the gas enters the gas inlet pipeline.

[0007] Preferably, the connecting flanges of the liquid flow meter are installed on both sides of the tube shell; the cone block of the liquid flow meter is installed in the center inside the tube shell; the cone block is connected to the connecting rod; the connecting rod and the torque sensor are fixed by screws; the torque sensor signal is transmitted to the signal processing board; the cone block of the liquid flow meter has anti-blocking characteristics.

[0008] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention adopts an integrated structural design, which can measure the heavy oil flow, gas flow meter and oil-water ratio, so that the entire metering system has a sophisticated structure and high measurement efficiency; (2) The present invention arranges a tunnel effect anti-blocking device inside the liquid inlet pipeline, and the liquid flow measurement component is anti-blocking and wear-resistant, and can measure media that are difficult to measure with traditional flow meters. It has a long service life and is maintenance-free, which reduces the on-site labor intensity of staff and improves the safety of production operations; (3) The present invention adopts an oil combing exhauster to stabilize the liquid flow field and further reduce the gas content. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0010] Figure 2 The structure of the oil combing exhauster of the present invention is shown in FIG. Figure Ⅰ .

[0011] Figure 3 The structure of the oil combing exhauster of the present invention is shown in FIG. Figure II .

[0012] Figure 4 It is a schematic diagram of the structure of the liquid flow meter of the present invention.

[0013] Figure 5 It is a cross-sectional view of the tunnel effect anti-blocking device structure of the present invention.

[0014] Figure 6 It is a cross-sectional view of the tunnel effect anti-blocking device structure of the present invention.

[0015] In the figure: 1-inlet flange; 2-separator; 3-liquid manifold; 4-liquid inlet pipeline; 5-comb oil exhauster; 501-shell; 502-comb oil pipe; 503-oil and gas nozzle; 504-oil blocking net; 505-gas collecting chamber; 506-gas manifold; 6-liquid flow meter; 601-cone block; 602-connecting rod; 603-torque sensor; 604-screw; 605-signal processing board; 606-tube shell; 607-connecting flange; 7-water content measuring instrument; 8-liquid outlet pipeline; 9-gas-liquid mixer; 10-outlet flange; 11-gas manifold; 12-gas inlet pipeline; 13-gas flow meter; 14-valve; 15-gas outlet pipeline; 16-signal connecting pipe; 17-tunnel effect anti-blocking device; 171-cone; 172-support frame. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-6 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0017] The present invention provides a novel oil-water-gas three-phase metering device, comprising an inlet flange 1, a separator 2, a liquid manifold 3, a liquid inlet pipeline 4, an oil combing exhauster 5, a liquid flow meter 6, a water content measuring instrument 7, a liquid outlet pipeline 8, a gas-liquid mixer 9, an outlet flange 10, a gas manifold 11, a gas inlet pipeline 12, a gas flow meter 13, a valve 14, a gas outlet pipeline 15, a signal connecting pipe 16 and a tunnel effect anti-blocking device 17; the inlet flange 1 is installed on the side of the separator 2; the separator 2 The lower part is connected to the liquid manifold 3; the liquid manifold 3 is connected to the liquid inlet pipeline 4, and a tunnel effect anti-blocking device 17 is installed inside the liquid inlet pipeline 4; the liquid inlet pipeline 4 is connected to the combing oil exhauster 5; the upper pipeline of the combing oil exhauster 5 is connected to the gas inlet pipeline 12; the rear of the combing oil exhauster 5 is connected to the liquid flow meter 6; the rear of the liquid flow meter 6 is connected to the water content measuring instrument 7; the rear of the water content measuring instrument 7 is connected to the liquid outlet pipeline 8; the liquid outlet pipeline 8 is connected to the gas-liquid mixer 9; the gas-liquid mixer 9 is connected to the outlet flange 10. The upper part of the separator 2 is connected to the gas manifold 11, and the gas manifold 11 is connected to the gas inlet pipeline 12; the gas inlet pipeline 12 is connected to the gas flow meter 13; the rear of the gas flow meter 13 is connected to the valve 14; the valve 14 is connected to the gas outlet pipeline 15; the gas outlet pipeline 15 is connected to the gas-liquid mixer 9; the signal connecting pipe 16 is connected to the gas flow meter 13; the signal connecting pipe 16 is connected to the liquid flow meter 6; the signal connecting pipe 16 is connected to the water content measuring instrument 7.

[0018] The tunnel effect anti-blocking device 17 includes a cone 171, which is installed at the center position inside the liquid inlet pipe 4; the cone 171 is connected to the inner wall of the liquid inlet pipe 4 through a support frame 172; the tunnel effect anti-blocking device 17 is the cone 171 and the support frame 172 working together to divide the liquid inlet pipe 4 into a tunnel space. The liquid is forced to move along the cone 171 after passing through the cone 171. Due to the reduction in cross-sectional area, the flow velocity of the fluid in the tunnel space increases rapidly, forming a self-flushing effect, which prevents the medium from being deposited inside the liquid inlet pipe 4.

[0019] An oil combing pipe 502 is arranged inside the shell 501 of the oil combing exhauster 5; an oil and gas nozzle 503 is arranged on the upper part of the oil combing pipe 502; an oil blocking net 504 is arranged inside the upper space of the shell 501; the upper part of the oil blocking net 504 is an air collecting chamber 505; the upper part of the air collecting chamber 505 is connected to the gas collecting pipe 506; the oil combing exhauster 5 is a shell 501 and an oil combing pipe 502 that work together to divide the pipeline into a balanced fluid pipeline space, and the liquid is rectified through the balanced fluid pipeline space to eliminate eddy currents, and stable liquid enters the liquid flowmeter 6; at the same time, the contained gas is further released, and the light gas is released through the oil and gas nozzle 503, and the oil blocking net 504 intercepts a small amount of oil and water in the gas, and the gas passes through the oil blocking net 504 into the gas collecting chamber 505, and the gas inside the gas collecting chamber 505 is connected to the gas inlet pipeline 12 through the gas collecting pipe 506, allowing the gas to enter the gas inlet pipeline 12.

[0020] The connecting flange 607 of the liquid flow meter 6 is installed on both sides of the tube shell 606; the cone block 601 of the liquid flow meter 6 is installed in the center inside the tube shell 606; the cone block 601 is connected to the connecting rod 602; the connecting rod 602 and the torque sensor 603 are fixed by screws 604; the signal of the torque sensor 603 is transmitted to the signal processing board 605; the cone block 601 of the liquid flow meter 6 has an anti-blocking characteristic.

[0021] The water content meter 7 uses microwave measurement, and the wave impedances of the two media, crude oil and water, are significantly different, and the wave impedance of crude oil is much greater than that of water. When microwaves propagating in crude oil encounter water droplets, strong reflections will be generated. The higher the water content in the crude oil, the stronger the reflection of microwaves. Under the condition that the intensity of the incident wave remains unchanged, the water content in the crude oil can be determined by measuring the strength of the microwaves reflected in the crude oil. The overall material is corrosion-resistant stainless steel or sulfur-resistant steel specially used for oil fields. The signal connection tube 16 uses an explosion-proof tube to meet the explosion-proof requirements of crude oil measuring equipment and further improve the safety of the flowmeter. It solves the problems of heavy oil deposition blockage and heavy oil flow measurement, and solves the gap in oil field metering equipment; the use of a tunnel effect blocker 17 effectively solves the problem of heavy oil pipeline deposition.

[0022] Liquid flow meter 6 using the torque measurement principle of conical cone block 601. It has the advantages of good high-viscosity medium measurement and good anti-blocking ability. The cone block 601 structure greatly reduces material sticking and has high measurement accuracy. It uses a water content meter 7. The measurement results of the water content meter 7 compensate for the measurement data of the liquid flow meter 6, improve the accuracy of the measurement system data, provide multi-parameter measurement results, and expand the measurement flow meter function. The built-in pressure measurement system monitors the working pressure of the oil field and oil wells in real time, greatly improving the safety of the system. The gas flow meter 13 is configured, and the gas flow meter 13 has its own temperature and pressure compensation, which greatly improves the accuracy of the gas flow. The valve 14 is configured to adjust the working system pressure, which can effectively ensure the working stability of the flow meter. The use of the combing oil exhauster 5 effectively solves the problem of the liquid vortex in the separator 2 affecting the metering of the liquid flow meter 6, and at the same time solves the problem of the gas content in the crude oil affecting the measurement accuracy of the liquid flow meter 6.

Claims

1. A novel oil-water-gas three-phase metering device, characterized in that: It comprises an inlet flange (1), a separator (2), a liquid manifold (3), a liquid inlet pipeline (4), an oil combing exhauster (5), a liquid flow meter (6), a water content measuring instrument (7), a liquid outlet pipeline (8), a gas-liquid mixer (9), an outlet flange (10), a gas manifold (11), a gas inlet pipeline (12), a gas flow meter (13), a valve (14), a gas outlet pipeline (15), a signal connecting pipe (16) and a tunnel effect anti-blocking device (17); The inlet flange (1) is installed on the side of the separator (2); the lower part of the separator (2) is connected to the liquid manifold (3); the liquid manifold (3) is connected to the liquid inlet pipeline (4), and a tunnel effect anti-blocking device (17) is installed inside the liquid inlet pipeline (4); the liquid inlet pipeline (4) is connected to the combing oil exhauster (5); the upper pipeline of the combing oil exhauster (5) is connected to the gas inlet pipeline (12); the rear part of the combing oil exhauster (5) is connected to the liquid flow meter (6); the rear part of the liquid flow meter (6) is connected to the water content measuring instrument (7); the rear part of the water content measuring instrument (7) is connected to the liquid outlet pipeline (8); the liquid outlet pipeline (8) is connected to the gas-liquid mixer (9); the gas-liquid mixer (9) is connected to the outlet flange (10).

2. A novel oil-water-gas three-phase metering device according to claim 1, characterized in that: The upper part of the separator (2) is connected to a gas manifold (11), the gas manifold (11) is connected to a gas inlet pipeline (12); the gas inlet pipeline (12) is connected to a gas flow meter (13); the rear part of the gas flow meter (13) is connected to a valve (14); the valve (14) is connected to a gas outlet pipeline (15); and the gas outlet pipeline (15) is connected to a gas-liquid mixer (9).

3. A novel oil-water-gas three-phase metering device according to claim 2, characterized in that: The signal connecting tube (16) is connected to the gas flow meter (13); the signal connecting tube (16) is connected to the liquid flow meter (6); and the signal connecting tube (16) is connected to the water content measuring instrument (7).

4. A novel oil-water-gas three-phase metering device according to claim 3, characterized in that: The tunnel effect anti-blocking device (17) comprises a cone (171), which is installed at the center position inside the liquid inlet pipe (4); the cone (171) is connected to the inner wall of the liquid inlet pipe (4) via a support frame (172).

5. A novel oil-water-gas three-phase metering device according to claim 4, characterized in that: The tunnel effect anti-blocking device (17) is a cone (171) and a support frame (172) that work together to divide the liquid inlet pipe (4) into a tunnel space. The liquid passes through the cone (171) and is forced to move along the cone (171). Due to the reduction in cross-sectional area, the flow velocity of the fluid in the tunnel space increases rapidly, forming a self-flushing effect, so that the medium cannot be deposited inside the liquid inlet pipe (4).

6. A novel oil-water-gas three-phase metering device according to claim 5, characterized in that: An oil combing pipe (502) is arranged inside the shell (501) of the oil combing exhauster (5); an oil and gas nozzle (503) is arranged on the upper part of the oil combing pipe (502); an oil blocking net (504) is arranged inside the upper space of the shell (501); an air collecting chamber (505) is located above the oil blocking net (504); and an air collecting pipe (506) is connected to the upper part of the air collecting chamber (505).

7. A novel oil-water-gas three-phase metering device according to claim 6, characterized in that: The combing oil exhauster (5) is a shell (501) and an oil combing pipe (502) that work together to divide the pipe into a balanced fluid pipe space. The liquid is rectified through the balanced fluid pipe space to eliminate vortices, and the stable liquid enters the liquid flow meter (6); at the same time, the contained gas is further released. The light gas is released through the oil and gas nozzle (503). The oil blocking net (504) intercepts a small amount of oil and water in the gas. The gas passes through the oil blocking net (504) and enters the gas collecting chamber (505). The gas inside the gas collecting chamber (505) is connected to the gas inlet pipe (12) through the gas collecting pipe (506), allowing the gas to enter the gas inlet pipe (12).

8. A novel oil-water-gas three-phase metering device according to claim 7, characterized in that: The connecting flange (607) of the liquid flow meter (6) is installed on both sides of the tube shell (606); the cone block (601) of the liquid flow meter (6) is installed in the center of the tube shell (606); the cone block (601) is connected to the connecting rod (602); the connecting rod (602) and the torque sensor (603) are fixed by screws (604); the signal of the torque sensor (603) is transmitted to the signal processing board (605).

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