Rapid metering and sampling device

Abstract

The utility model belongs to the field of metering equipment for natural gas production, and particularly relates to a rapid metering and sampling device. According to the technology, a prying frame, a gas-liquid two-phase flowmeter and a sampler are included, the gas-liquid two-phase flowmeter and the sampler are both fixed to the prying frame, the outlet end of the gas-liquid two-phase flowmeter is communicated with the inlet end of the sampler through a pipeline, and the inlet end of the gas-liquid two-phase flowmeter and the outlet end of the sampler are connected to a natural gas production process pipeline through flanges. Real-time metering of the gas production rate and the liquid production rate of the natural gas production well under the gas-liquid two-phase mixing condition of natural gas is achieved, and the metering precision is not affected by liquid; meanwhile, an integrated skid-mounted design is adopted, so that transportation, installation and use are convenient, the field operation period is shortened, and the test requirements of field modular application can be met; in addition, parameters of the gas-liquid two-phase flow meter can be corrected, the liquid metering precision is improved, and then the metering precision of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the field of metering equipment for natural gas production, and particularly relates to a rapid metering and sampling device. Background Art

[0002] In the process of gas field exploitation and gathering and transportation production management, in order to monitor the dynamic changes of the production flow rate of gas wells, it is necessary to install an on-line flowmeter on the production pipeline to understand the change characteristics of the gas production volume and liquid production volume of production wells at any time, explore the variation laws of the water production volume, gas production volume and pressure of gas wells under different production conditions, accurately measure the water production volume and gas production volume of a single well (well group), and compare the measurement errors between the wellhead flowmeter metering, the throttler production allocation output and the true metering output.

[0003] At present, the metering methods for natural gas production volume and liquid production volume are mainly divided into three types: (1) calculating the flow rates of gas and liquid two media through the total volume flow rate of gas-liquid two-phase flow measured by a Venturi flowmeter and the gas volume fraction measured by a single-energy gamma sensor (weak source americium-241). This device is easy to install and has high metering accuracy, but has problems such as high device cost and weak radioactivity; (2) using a vertical gas-liquid cyclone separator with an internal spiral rectifying device to separate gas and liquid, measuring the gas phase flow rate after separation with a swirl flowmeter, and measuring the liquid phase flow rate after separation with a mass flowmeter. This device has a compact structure, but has large metering errors and high metering costs; (3) separating gas and liquid from the fluid through a rectifier, measuring the gas through a swirl flowmeter, and the liquid enters a volume tube through a four-way valve to push the piston to move in a cycle to measure the liquid flow rate, which has problems such as large device vibration, large metering errors and high metering costs.

[0004] Through the above analysis, the overall problems and defects of the existing technology are: there are problems such as high metering cost and low metering accuracy, and it cannot meet the test requirements of on-site large-scale application. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a rapid metering and sampling device, which can accurately detect the gas production volume and liquid production volume of production wells by measuring the flow rates of gas and liquid in real time, and solve the problems of high metering cost and low metering accuracy existing in the existing technology.

[0006] The rapid metering and sampling device includes a skid frame, a gas-liquid two-phase flowmeter and a sampler. The gas-liquid two-phase flowmeter and the sampler are both fixed on the skid frame. The outlet end of the gas-liquid two-phase flowmeter and the inlet end of the sampler are connected through a pipeline, and the inlet end of the gas-liquid two-phase flowmeter and the outlet end of the sampler are connected to the process pipeline of natural gas production through flanges.

[0007] When in use, it is installed on the production pipeline of a natural gas well. Through the gas-liquid two-phase flowmeter, the real-time measurement of the gas production volume and liquid production volume of a natural gas production well under the condition of gas-liquid two-phase mixing of natural gas can be realized. The measurement accuracy is not affected by the liquid. It adopts an integrated skid-mounted design, which is not only convenient for transportation, installation and use, shortens the on-site operation cycle, and can meet the test requirements of on-site modular applications; at the same time, it is also integrated with a sampler. The sampler collects the liquid sample of the gas well online, which can not only be used for gas reservoir analysis, but also analyze the components and density of the sampled liquid sample, so as to correct the parameters of the gas-liquid two-phase flowmeter, improve the liquid volume measurement accuracy, and further improve the measurement accuracy of this device.

[0008] Further, the gas-liquid two-phase flowmeter includes a first delivery pipe, a first differential pressure transmitter, a meter head, and a gas-liquid ratio sensor. The two ends of the first delivery pipe are respectively connected to the outlet section of the upstream process pipeline and the inlet end of the sampler. A first differential pressure transmitter and a gas-liquid ratio sensor are arranged on the first delivery pipe, and the first differential pressure transmitter and the gas-liquid ratio sensor are respectively connected to the meter head through pipelines.

[0009] The inlet end of the first delivery pipe is connected to the process pipeline and is used to introduce the gas-liquid two-phase mixed fluid to be measured; the first differential pressure transmitter is used to detect the upstream and downstream pressure difference generated when the gas-liquid two-phase mixed fluid in the first delivery pipe passes through the orifice plate, and obtain the total flow rate of the gas-liquid two-phase mixed fluid in the first delivery pipe; the gas-liquid ratio sensor is used to detect the ratio of the gas-phase fluid and the liquid-phase fluid in the first delivery pipe. The data analysis module set in the meter head calculates the working condition flow rates of each phase of gas and water according to the total flow rate of the measured gas-liquid two-phase liquid and the gas-liquid ratio measured by the gas-liquid ratio sensor, and finally converts the working condition flow rate into the standard condition flow rate by PVT parameters, so as to realize the real-time measurement of the gas production volume and liquid production volume of the natural gas production well. It can be seen that the above-mentioned gas-liquid two-phase flowmeter can realize the real-time measurement of the gas production volume and liquid production volume of a natural gas production well under the condition of gas-liquid two-phase mixing of natural gas, and its measurement accuracy is not affected by the liquid.

[0010] Further, the gas-liquid two-phase flowmeter further includes a temperature and pressure transmitter, which is arranged on the first delivery pipe and is also connected to the meter head through a pipeline.

[0011] The temperature and pressure transmitter is used to detect the temperature and pressure of the fluid in the first delivery pipe and upload them to the meter head; the meter head is used to display the temperature and pressure detected by the temperature and pressure transmitter.

[0012] Further, the sampler includes a second delivery pipe, a sampling pipe, a gas-liquid separation tank, a differential pressure detection pipe, a liquid outlet pipe, and a reflux pipe. The two ends of the second delivery pipe are respectively connected to the outlet end of the gas-liquid two-phase flowmeter and the inlet end of the downstream process pipeline. The inlet end of the sampling pipe is communicated with the bottom of the second delivery pipe, and the outlet end of the sampling pipe is connected to the inlet end at the top of the gas-liquid separation tank. The liquid outlet end at the lower part of the gas-liquid separation tank is connected to the liquid outlet pipe, and the gas outlet at the bottom of the gas-liquid separation tank is communicated with the second delivery pipe through the reflux pipe. The upper and lower ends of the gas-liquid separation tank are also communicated through the differential pressure detection pipe, and a second differential pressure transmitter is arranged on the differential pressure detection pipe.

[0013] The above sampler samples the fluid in the second delivery pipe, and the sampled sample is input into the gas-liquid separation tank for gas-liquid separation. The separated gas is input into the second delivery pipe through the reflux pipe, and the liquid is output through the liquid outlet pipe. By analyzing the components and density of the liquid sample, the parameters of the gas-liquid two-phase flowmeter can be corrected, improving the liquid volume measurement accuracy and further enhancing the measurement accuracy of this device. In addition, the second differential pressure transmitter can detect the pressure difference before and after gas-liquid separation, enabling gas reservoir analysis and calculating the gas-liquid ratio of the natural gas produced by the gas production well to correct the parameters of the gas-liquid ratio sensor in the gas-liquid two-phase flowmeter, thereby further improving the measurement accuracy.

[0014] Further, a first high-pressure needle valve is arranged on the sampling pipe, a second high-pressure needle valve is arranged between the gas-liquid separation tank and the pressure gauge, a third high-pressure needle valve is arranged on the liquid outlet pipe, and a fourth high-pressure needle valve is arranged on the second delivery pipe.

[0015] Through the settings of the first high-pressure needle valve, the second high-pressure needle valve, the third high-pressure needle valve, and the fourth high-pressure needle valve, the on-off control of the corresponding pipelines can be carried out as needed, thus realizing the solid-liquid separation of the fluid in the second delivery pipe and liquid sampling.

[0016] Further, the skid frame includes a base, support columns, and mounting plates. Two support columns are fixedly connected to the middle of the base, and mounting plates are respectively and fixedly installed on the two support columns. The gas-liquid two-phase flowmeter and the sampler are respectively fixed on the two mounting plates.

[0017] With the skid frame of the above structure, the integrated skid-mounted design of this device is realized, making this device not only convenient for transportation, installation, and use, shortening the on-site operation cycle, but also meeting the test requirements of on-site modular applications.

[0018] Further, the base is in a U-shaped frame structure, and the support columns are arranged on the middle cross beam of the base.

[0019] Adopting the frame structure can reduce the self-weight of the skid frame, making this device easy to transport and install.

[0020] Furthermore, the skid also includes a protection frame which is disposed outside the gas-liquid two-phase flowmeter and the sampler, and the lower end of the protection frame is connected to the base.

[0021] Based on the cooperation between the protection frame and the base, protection can be provided for the gas-liquid two-phase flowmeter and the sampler, preventing the functional failure of the device caused by bumps during transportation or installation.

[0022] Compared with the prior art, the present utility model has the following beneficial effects:

[0023] 1. When in use, the present utility model is installed on the production pipeline of a natural gas well. Through the cooperation of the temperature and pressure transmitter and the gas-liquid ratio sensor of the gas-liquid two-phase flowmeter, real-time measurement of the gas production and liquid production of the natural gas production well under the condition of gas-liquid two-phase mixing of natural gas can be achieved. The measurement accuracy is not affected by the liquid. With an integrated skid-mounted design, it is not only convenient for transportation, installation and use, shortening the on-site operation cycle, but also can meet the test requirements of on-site modular applications.

[0024] 2. The present utility model is also integrated with a sampler. By online collecting the liquid samples of the gas well, it can not only be used for gas reservoir analysis, but also analyze the components and density of the sampled liquid samples, thereby correcting the parameters of the gas-liquid two-phase flowmeter and improving the liquid volume measurement accuracy, and further improving the measurement accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2 is a left view of the present utility model;

[0027] Figure 3 is a top view of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the gas-liquid two-phase flowmeter;

[0029] Figure 5 is a right view of the gas-liquid two-phase flowmeter;

[0030] Figure 6 is a top view of the gas-liquid two-phase flowmeter;

[0031] Figure 7 is a schematic structural diagram of the sampler;

[0032] Figure 8 is a left view of the sampler.

[0033] Names of each component in the figure: 1. Skid frame; 1.1 Base; 1.2 Support column; 1.3 Mounting plate; 1.4 Protection frame; 2. Gas-liquid two-phase flowmeter; 2.1 First conveying pipe; 2.2 Temperature and pressure transmitter; 2.3 First differential pressure transmitter; 2.4 Meter head; 2.5 Gas-liquid ratio sensor; 3. Sampler; 3.1 Second conveying pipe; 3.2 Sampling pipe; 3.3 First high-pressure needle valve; 3.4 Gas-liquid separation tank; 3.5 Second high-pressure needle valve; 3.6 Pressure gauge; 3.7 Differential pressure detection pipe; 3.8 Second differential pressure transmitter; 3.9 Liquid outlet pipe; 3.10 Third high-pressure needle valve; 3.11 Return pipe; 3.12 Fourth high-pressure needle valve. Detailed implementation mode

[0034] The present utility model will be further described below in conjunction with the accompanying drawings through specific embodiments, but it is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present invention.

[0035] As Figures 1 - 3 shown, this embodiment provides a rapid metering and sampling device, including a skid frame 1, a gas-liquid two-phase flowmeter 2, and a sampler 3. The gas-liquid two-phase flowmeter 2 and the sampler 3 are both fixed on the skid frame 1. The outlet end of the gas-liquid two-phase flowmeter 2 and the inlet end of the sampler 3 are connected through a pipeline, and the inlet end of the gas-liquid two-phase flowmeter 2 and the outlet end of the sampler 3 are connected to the process pipeline of natural gas production through flanges. The gas-liquid two-phase flowmeter 2 is used for real-time metering of the gas production volume and liquid production volume of a natural gas production well under the condition of gas-liquid two-phase mixing of natural gas. The sampler 3 is used for online collection of gas well liquid samples for gas reservoir analysis and for analyzing the components and density of the sampled liquid samples to correct the parameters of the gas-liquid two-phase flowmeter and improve the liquid volume metering accuracy.

[0036] It can also be seen from Figures 1 - 3 that the skid frame 1 includes a base 1.1, support columns 1.2, a mounting plate 1.3, and a protection frame 1.4. Two support columns 1.2 are fixedly connected to the middle of the base 1.1, and mounting plates 1.3 are respectively fixedly installed on the two support columns 1.2. The gas-liquid two-phase flowmeter 2 and the sampler 3 are respectively fixed on the two mounting plates 1.3. The protection frame 1.4 is disposed outside the gas-liquid two-phase flowmeter 2 and the sampler 3, and the lower end of the protection frame 1.4 is connected to the base 1.1.

[0037] With the pry frame 1 of the above structure, the integrated skid-mounted design of the device is realized, making the device not only convenient for transportation, installation and use, shortening the on-site operation cycle, and meeting the test requirements of on-site modular application. At the same time, based on the cooperation of the protection frame 1.4 and the base 1.1, the gas-liquid two-phase flowmeter 2 and the sampler 3 can be protected, preventing the device from malfunctioning due to bumps during transportation or installation.

[0038] In some preferred embodiments, the base 1.1 is in a U-shaped frame structure, and the support column 1.2 is arranged on the middle cross beam of the base 1.1. The base 1.1 with a frame structure can reduce the self-weight of the pry frame 1, making the device convenient for transportation and installation.

[0039] As Figures 4 - 6 shown, the gas-liquid two-phase flowmeter 2 includes a first delivery pipe 2.1, a temperature and pressure transmitter 2.2, a first differential pressure transmitter 2.3, a meter head 2.4, and a gas-liquid ratio sensor 2.5. The two ends of the first delivery pipe 2.1 are respectively connected to the outlet section of the upstream process pipeline and the inlet end of the sampler 3. The temperature and pressure transmitter 2.2, the first differential pressure transmitter 2.3, and the gas-liquid ratio sensor 2.5 are arranged on the first delivery pipe 2.1, and the temperature and pressure transmitter 2.2, the first differential pressure transmitter 2.3, and the gas-liquid ratio sensor 2.5 are respectively connected to the meter head 2.4 through pipelines.

[0040] The inlet end of the first delivery pipe 2.1 is connected to the outlet end of the upstream process pipeline for introducing the gas-liquid two-phase mixed fluid to be measured; the temperature and pressure transmitter 2.2 is a temperature transmitter and a pressure transmitter for detecting the temperature and pressure of the fluid in the first delivery pipe 2.1 and uploading them to the meter head 2.4; the first differential pressure transmitter 2.3 is used for detecting the upstream and downstream pressure differences generated when the gas-liquid two-phase mixed fluid in the first delivery pipe 2.1 passes through the orifice plate to obtain the total flow rate of the gas-liquid two-phase mixed fluid in the first delivery pipe 2.1; the gas-liquid ratio sensor 2.5 is used for detecting the ratio of the gas-phase fluid and the liquid-phase fluid in the first delivery pipe 2.1. The data analysis module arranged in the meter head 2.4 calculates the working condition flow rates of each phase of gas and water according to the total flow rate of the measured gas-liquid two-phase liquid and the gas-liquid ratio measured by the gas-liquid ratio sensor 2.5, and finally converts the working condition flow rates into standard condition flow rates by PVT parameters, so as to realize the real-time measurement of the gas production volume and liquid production volume of the natural gas production well; the meter head 2.4 is also used for displaying the temperature and pressure detected by the temperature and pressure transmitter 2.2.

[0041] It can be seen that the gas-liquid two-phase flowmeter 2 described in this example is mainly divided into three parts: a fluid introduction part, a data acquisition part, and a data processing part. Specifically, the fluid introduction part is the first delivery pipe 2.1, the data acquisition part is the temperature and pressure transmitter 2.2, the first differential pressure transmitter 2.3, and the gas-liquid ratio sensor 2.5. Among them, the first differential pressure transmitter 2.3 is an orifice flowmeter, which is used to measure the flow rate of the gas-liquid mixed condition flowing through the pipeline in real time; the gas-liquid ratio sensor 2.5 is used to measure the volume ratio of gas and liquid respectively in the gas-liquid mixed fluid flowing through the pipeline in real time; the data processing part is the data analysis module in the meter head 2.4, which is used to collect and process all sensor signals, calculate the corresponding flow rate data, and save the measurement results.

[0042] Based on the above content, the principle of the gas-liquid two-phase flowmeter 2 for real-time measurement of gas production and liquid production is as follows: obtain the total flow rate of the working medium measured by the orifice plate; obtain the gas-liquid ratio of the working medium detected by the gas-liquid ratio sensor 2.5, calculate the working medium flow rates of gas and water phases according to the total flow rate and the gas-liquid ratio, and finally convert the working medium flow rate into the standard condition flow rate by PVT parameters. Therefore, the above gas-liquid two-phase flowmeter 2 can realize the real-time measurement of gas production and liquid production of natural gas production wells under the condition of natural gas gas-liquid two-phase mixing, and its measurement accuracy is not affected by liquids.

[0043] See the appendix Figure 7 And the appendix Figure 8 As shown, the sampler 3 includes a second delivery pipe 3.1, a sampling pipe 3.2, a gas-liquid separation tank 3.4, a differential pressure detection pipe 3.7, a liquid outlet pipe 3.9, and a return pipe 3.11. The two ends of the second delivery pipe 3.1 are respectively connected to the outlet end of the gas-liquid two-phase flowmeter 2 and the inlet end of the downstream process pipeline. The inlet end of the sampling pipe 3.2 is connected to the bottom of the second delivery pipe 3.1, the outlet end of the sampling pipe 3.2 is connected to the inlet end at the top of the gas-liquid separation tank 3.4, the liquid outlet end at the lower part of the gas-liquid separation tank 3.4 is connected to the liquid outlet pipe 3.9, the gas outlet at the bottom of the gas-liquid separation tank 3.4 is connected to the second delivery pipe 3.1 through the return pipe 3.11, and the upper and lower ends of the gas-liquid separation tank 3.4 are also connected through the differential pressure detection pipe 3.7. A second differential pressure transmitter 3.8 is arranged on the differential pressure detection pipe 3.7.

[0044] The sampler 3 is mainly used to extract the water sample in the natural gas. The second delivery pipe 3.1 of the sampler 3 is installed on the process pipeline. The internal geometric shape of the second delivery pipe 3.1 is designed as a Venturi tube section. When the fluid flows through the sampler 3, a pressure difference will be generated between the inlet and outlet of the sampling port, so that the medium enters the gas-liquid separation tank 3.4 through the sampling pipe 3.2. A swirl will be generated in the upper part of the gas-liquid separation tank 3.4. Due to the different densities of the gas and the liquid, under the action of the centrifugal force, the liquid with a larger density will rotate downward along the tank wall of the gas-liquid separation tank 3.4, and the gas with a smaller density will rotate near the center and collide with the central sieve holes and baffles. After being blocked, the liquid droplets will flow down along the baffle and the wall of the central conduit into the bottom of the tank body and be retained in the liquid accumulation area at the lower part of the gas-liquid separation tank 3.4. The liquid sample is taken out through the liquid outlet pipe 3.9 on the side of the bottom of the gas-liquid separation tank 3.4. The separated gas passes through the conduit in the center of the gas-liquid separation tank 3.4 and flows back to the downstream process pipeline through the outlet at the bottom of the tank body of the gas-liquid separation tank 3.4 via the return pipe 3.11 to ensure that the on-line sampling will not affect the production.

[0045] That is to say, the above-mentioned sampler 3 samples the fluid in the second delivery pipe 3.1, and the sampled sample is input into the gas-liquid separation tank 3.4 for gas-liquid separation. The separated gas is input into the second delivery pipe 3.1 through the return pipe 3.11, and the liquid is output through the liquid outlet pipe 3.9. By analyzing the components and density of the liquid sample, the parameters of the gas-liquid two-phase flowmeter 2 can be corrected, the liquid volume measurement accuracy can be improved, and further the measurement accuracy of this device can be improved. In addition, the second differential pressure transmitter 3.8 can detect the pressure difference before and after gas-liquid separation, so that gas reservoir analysis can be carried out, and the gas-liquid ratio of the natural gas produced by the gas production well can be calculated to correct the parameters of the gas-liquid ratio sensor 2.5 in the gas-liquid two-phase flowmeter 2, thereby further improving the measurement accuracy.

[0046] Furthermore, a first high-pressure needle valve 3.3 is arranged on the sampling pipe 3.2, a second high-pressure needle valve 3.5 is arranged between the gas-liquid separation tank 3.4 and the pressure gauge 3.6, a third high-pressure needle valve 3.10 is arranged on the liquid outlet pipe 3.9, and a fourth high-pressure needle valve 3.12 is arranged on the second delivery pipe 3.1. Through the settings of the first high-pressure needle valve 3.3, the second high-pressure needle valve 3.5, the third high-pressure needle valve 3.10, and the fourth high-pressure needle valve 3.12, the on-off control of the corresponding pipeline can be carried out as needed, so as to realize the solid-liquid separation of the fluid in the second delivery pipe 3.1 and liquid sampling.

[0047] In summary, the device described in this embodiment is installed on the production pipeline of a natural gas well during use. Through the gas-liquid two-phase flowmeter 2, the real-time measurement of the gas production volume and liquid production volume of a natural gas production well under the condition of gas-liquid two-phase mixing of natural gas can be achieved. The measurement accuracy is not affected by the liquid. With an integrated skid-mounted design, it is not only convenient for transportation, installation and use, shortening the on-site operation cycle, but also can meet the test requirements of on-site modular application. At the same time, through the integrated sampler 3, the liquid sample of the gas well can be collected online. It can not only be used for gas reservoir analysis, but also analyze the components and density of the sampled liquid sample, so as to correct the parameters of the gas-liquid two-phase flowmeter 2, improve the liquid volume measurement accuracy, and further improve the measurement accuracy of this device.

Claims

1. A rapid metering and sampling device, characterized in that: The invention comprises a skid frame (1), a gas-liquid two-phase flow meter (2), and a sampler (3), wherein the gas-liquid two-phase flow meter (2) and the sampler (3) are both fixed on the skid frame (1), the outlet end of the gas-liquid two-phase flow meter (2) and the inlet end of the sampler (3) are connected through a pipeline, and the inlet end of the gas-liquid two-phase flow meter (2) and the outlet end of the sampler (3) are connected to a process pipeline for natural gas production through a flange.

2. The quick metering and sampling device according to claim 1, characterized in that: The gas-liquid two-phase flowmeter (2) comprises a first delivery pipe (2.1), a first differential pressure transmitter (2.3), a meter head (2.4), and a gas-liquid ratio sensor (2.5); the two ends of the first delivery pipe (2.1) are respectively connected to the outlet section of an upstream process pipeline and the inlet end of a sampler (3); the first differential pressure transmitter (2.3) and the gas-liquid ratio sensor (2.5) are arranged on the first delivery pipe (2.1); the first differential pressure transmitter (2.3) and the gas-liquid ratio sensor (2.5) are respectively connected to the meter head (2.4) via pipelines.

3. The quick metering and sampling device according to claim 2, characterized in that: The gas-liquid two-phase flow meter (2) further comprises a temperature and pressure transmitter (2.2), which is arranged on the first delivery pipe (2.1) and is connected to the meter head (2.4) via a pipeline.

4. The quick metering and sampling device according to claim 1, characterized in that: The sampler (3) comprises a second delivery pipe (3.1), a sampling pipe (3.2), a gas-liquid separation tank (3.4), a differential pressure detection pipe (3.7), a liquid outlet pipe (3.9) and a reflux pipe (3.11); the two ends of the second delivery pipe (3.1) are respectively connected to the outlet end of the gas-liquid two-phase flow meter (2) and the inlet end of the downstream process pipeline; the inlet end of the sampling pipe (3.2) is connected to the bottom of the second delivery pipe (3.1); the sampling pipe (3.2) is connected to the bottom of the second delivery pipe (3.1); the sampling pipe (3.7 ... The outlet end of the gas-liquid separation tank (3.2) is connected to the inlet end at the top of the gas-liquid separation tank (3.4), the liquid outlet end at the bottom of the gas-liquid separation tank (3.4) is connected to the liquid outlet pipe (3.9), the gas outlet at the bottom of the gas-liquid separation tank (3.4) is connected to the second delivery pipe (3.1) through the reflux pipe (3.11), and the upper and lower ends of the gas-liquid separation tank (3.4) are also connected through a differential pressure detection pipe (3.7), and a second differential pressure transmitter (3.8) is arranged on the differential pressure detection pipe (3.7).

5. The quick metering and sampling device according to claim 4, characterized in that: A first high-pressure needle valve (3.3) is arranged on the sampling tube (3.2), a second high-pressure needle valve (3.5) is arranged between the gas-liquid separation tank (3.4) and the pressure gauge (3.6), a third high-pressure needle valve (3.10) is arranged on the liquid outlet pipe (3.9), and a fourth high-pressure needle valve (3.12) is arranged on the second delivery pipe (3.1).

6. The quick metering and sampling device according to any one of claims 1-5, characterized in that: The skid frame (1) comprises a base (1.1), a support column (1.2), and a mounting plate (1.3); two support columns (1.2) are fixedly connected to the middle of the base (1.1); mounting plates (1.3) are fixedly mounted on the two support columns (1.2), respectively; and the gas-liquid two-phase flow meter (2) and the sampler (3) are respectively fixed on the two mounting plates (1.3).

7. The quick metering and sampling device according to claim 6, characterized in that: The base (1.1) is in the form of a "Y"-shaped frame structure, and the support column (1.2) is arranged on the middle crossbeam of the base (1.1).

8. The quick metering and sampling device according to claim 6, characterized in that: The pry frame (1) further includes a protection frame (1.4), the protection frame (1.4) irradiates on the outer sides of the gas-liquid two-phase flowmeter (2) and the sampler (3), and the lower end of the protection frame (1.4) is connected to the base (1.1).

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