A mobile dual-air-path testing and metering device

Abstract

This invention provides a mobile dual-gas-path testing and metering device, including a testing and metering system mounted on a fixed frame for supporting and moving the system. The testing and metering system includes an oil-gas mixture input pipeline, a gas-liquid separation pipeline, a dual-gas-path metering pipeline, a liquid phase metering pipeline, and a gas-liquid mixture discharge pipeline. The output end of the oil-gas mixture input pipeline is connected to the gas-liquid separation pipeline, and the oil-gas mixture is supplied to the gas-liquid separation pipeline through the input pipeline. This invention, by designing a dual-gas-path metering pipeline, allows for manual switching based on the flow rate of the oil-gas mixture, thus solving the problem of large accuracy deviations in current single-path metering and widening the measurement range. Connecting an inlet / outlet pipe between the oil-gas mixture input pipeline and the gas-liquid mixture discharge pipeline allows for maintenance of the testing and metering system without shutting down the oil well.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas separation metering and testing technology, specifically to a mobile dual-gas-path testing and metering device. Background Technology

[0002] The test metering skid is a metering device designed to address the challenges of removing gas from crude oil and the difficulty, time-consuming, and labor-intensive nature of manual metering. It integrates separation and metering functions, calculates the production volume of an oil well, and measures the gas production of a single well.

[0003] The existing Chinese utility model patent CN 211144468 U discloses a single-well testing and metering skid, comprising a mounting bracket and a single-well testing and metering system. The mounting bracket houses the single-well testing and metering system and serves to support and transfer the system. The single-well testing and metering system includes an oil-gas mixture delivery pipeline, a gas-liquid separator, a gas testing and metering pipeline, and a liquid testing and metering pipeline. The output end of the oil-gas mixture delivery pipeline is connected to the inclined inlet pipe of the gas-liquid separator, the gas outlet pipe of the gas-liquid separator is connected to the inlet end of the gas testing and metering pipeline, and the liquid outlet pipe of the gas-liquid separator is connected to the inlet end of the liquid testing and metering pipeline. The gas and liquid testing and metering pipelines are arranged vertically, with their outlet ends converging. This utility model, using this metering skid, can achieve good separation of the gas and liquid phases in the oil-gas mixture, ensuring testing accuracy. It also features a compact structure, minimal space occupation, and low cost.

[0004] However, the existing testing and metering skids described above only have one gas path for gas phase metering, and the range of the single-path flowmeter is fixed. Because gas phase flow fluctuates, a fixed measurement range can easily lead to poor measurement accuracy. Furthermore, when the current testing and metering skid requires maintenance, since it is connected to the oil well, maintenance of the skid necessitates shutting down the well. This not only causes intermittent well operation but also results in wear and tear on the wellhead equipment due to frequent well shutdowns. Utility Model Content

[0005] In view of this, the problem to be solved by this utility model is to provide a mobile dual-air-path testing and measuring device.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A mobile dual-air-path testing and metering device includes a testing and metering system, which is mounted on a fixed frame, and the fixed frame is used to support and move the testing and metering system.

[0008] The testing and metering system includes an oil-gas mixture input pipeline, a gas-liquid separation pipeline, a dual-gas-path metering pipeline, a liquid-phase metering pipeline, and a gas-liquid mixture discharge pipeline. The output end of the oil-gas mixture input pipeline is connected to the gas-liquid separation pipeline, and the oil-gas mixture is delivered to the gas-liquid separation pipeline through the oil-gas mixture input pipeline.

[0009] The gas-liquid separation pipeline has a gas phase outlet and a liquid phase outlet on its gas-liquid control pipe. The dual gas path metering pipeline includes a large-range gas phase metering pipeline and a small-range gas phase metering pipeline. The gas phase outlet is connected to the input end of the large-range gas phase metering pipeline and the input end of the small-range gas phase metering pipeline, respectively. The output end of the large-range gas phase metering pipeline is connected to the output end of the small-range gas phase metering pipeline and is also connected to the input end of the gas-liquid mixture discharge pipeline.

[0010] The liquid phase outlet is connected to the input end of the liquid phase metering pipeline, and the output end of the liquid phase metering pipeline is connected to the input end of the gas-liquid mixture discharge pipeline. The metered gas phase and liquid phase both enter the gas-liquid mixture discharge pipeline and are mixed and discharged.

[0011] An inlet / outlet connecting pipe is provided between the inlet end of the oil-gas mixture input pipeline and the outlet end of the gas-liquid mixture discharge pipeline.

[0012] Furthermore, the gas-liquid separation pipeline also includes a gas-liquid cyclone tube and a buffer separation tube. Both the gas-liquid cyclone tube and the gas-liquid control tube are vertically arranged. The two ends of the gas-liquid cyclone tube are respectively connected to the two ends of the gas-liquid control tube, and the connection forms a "D" shape. The buffer separation tube is vertically arranged between the gas-liquid cyclone tube and the gas-liquid control tube. The two ends of the buffer separation tube are respectively connected to the gas-liquid cyclone tube and the gas-liquid control tube through a T-junction.

[0013] Furthermore, the gas phase large-range metering pipeline includes a large-range metering pipe, a large-range gas phase mass flow meter, and a second ball valve. Two second ball valves and a large-range flow meter are connected in sequence on the large-range metering pipe, and the large-range gas phase mass flow meter is arranged between the two second ball valves.

[0014] Furthermore, the gas phase small-range metering pipeline includes a small metering tube, a small-range gas phase mass flow meter, and a third ball valve. Two third ball valves and a small-range flow meter are connected sequentially to the small metering tube, and the small-range gas phase mass flow meter is arranged between the two third ball valves. The gas phase outlet on the gas-liquid control pipe is connected to the input end of the large metering tube and the input end of the small metering tube respectively through a three-way pipe. The output end of the large metering tube and the output end of the small metering tube are connected and connected to the input end of the main pipe through a three-way pipe.

[0015] Furthermore, the upper end of the buffer separation tube is provided with an air outlet, and the air outlet of the buffer separation tube is connected to the input end of the large metering tube through a connecting pipe, and a pressure relief ball valve is installed on the connecting pipe.

[0016] Furthermore, the oil-gas mixture input pipeline includes an input pipe, an input inclined pipe, and a first ball valve. The output end of the input pipe is connected to the input inclined pipe, and the output end of the input inclined pipe is connected to the input port of the gas-liquid cyclone pipe. The first ball valve is installed on the input end of the input pipe.

[0017] Furthermore, the liquid phase metering pipeline includes a liquid phase delivery pipe, a fourth ball valve, and a liquid phase mass flow meter. The fourth ball valve and the liquid phase mass flow meter are sequentially installed on the liquid phase delivery pipe, and the fourth ball valve is located at the input end of the liquid phase delivery pipe. The input end of the liquid phase delivery pipe is connected to the liquid phase outlet of the gas-liquid control pipe.

[0018] Furthermore, the output end of the liquid phase delivery pipe is connected to the output end of the main pipe via a tee pipe and to the input end of the mixing pipe, and a mixing ball valve is installed on the input end of the mixing pipe.

[0019] Furthermore, the gas-liquid mixture discharge pipeline includes a discharge pipe and a fifth ball valve. The input end of the discharge pipe is connected to the output end of the mixing pipe. The fifth ball valve is installed on the discharge pipe. An inlet-outlet connecting pipe is arranged between the discharge pipe and the input pipe. The two ends of the inlet-outlet connecting pipe are respectively connected to the discharge pipe and the input pipe through a tee pipe. An inlet-outlet connecting ball valve is provided on the inlet-outlet connecting pipe.

[0020] Furthermore, the lower ends of the gas-liquid cyclone tube, the buffer separation tube, and the gas-liquid control tube are all connected to the drain pipe. The output end of the drain pipe is connected to the input end of the discharge pipe through a three-way pipe, and a drain valve is installed on the drain pipe.

[0021] Furthermore, pressure transmitters are installed on the main pipe and the input pipe.

[0022] Furthermore, the mounting frame is equipped with a power supply box and a PLC control box. The power supply box and the PLC control box are electrically connected to the pressure transmitter, the large-range gas phase mass flow meter, the small-range gas phase mass flow meter, and the liquid phase mass flow meter, respectively. The metering information is transmitted to the PLC control box for display.

[0023] The advantages and positive effects of this utility model are:

[0024] (1) This utility model designs a dual-gas-path metering pipeline, which allows for manual switching based on the flow rate of the oil-gas mixture. When the flow rate is low, a small-range gas mass flow meter on the small-range gas-phase metering pipeline is selected for measurement to avoid the flow rate falling below the lower limit of the large-range flow rate and ensure measurement accuracy. When the flow rate is high, a large-range gas mass flow meter on the large-range gas-phase metering pipeline is selected for measurement to avoid the flow rate exceeding the upper limit of the small-range flow rate and protect the equipment. Alternatively, both paths can be opened for measurement, and the flow meter readings can be added to cover the intermediate range that cannot be adapted by a single path. This solves the problem of large accuracy deviation in single-path metering and widens the range.

[0025] (2) The gas-liquid separation pipeline designed in this utility model transforms the original structure of connecting three separate tanks into a pipeline process consisting of a gas-liquid cyclone pipe, a buffer separation pipe, and a gas-liquid control pipe, which greatly simplifies the overall structure of the measuring device, reduces the number of pipes and ball valves used for pipeline connection, and saves costs.

[0026] (3) This utility model connects the input pipe of the oil-gas mixture input pipeline and the discharge pipe of the gas-liquid mixture discharge pipeline with an inlet-outlet connecting pipe. When the test and metering system needs to be maintained, the first ball valve on the input pipe and the fifth ball valve on the discharge pipe are closed, and the inlet-outlet connecting ball valve on the inlet-outlet connecting pipe is opened. This prevents the oil input from the oil well to the test and metering system from entering the test and metering system, and instead allows the oil to flow from the inlet-outlet connecting pipe to the discharge pipe. This eliminates the need to shut down the oil well when the test and metering system is maintained.

[0027] (4) This utility model provides an air outlet at the upper end of the buffer separation tube, and the air outlet is connected to the large metering tube. When the flow rate is large, the pressure relief ball valve is opened, so that the gas in the buffer separation tube flows into the large metering tube to exhaust the gas from the buffer separation tube and avoid pressure buildup in the buffer separation tube. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is an overall structural diagram of a mobile dual-air-path testing and measuring device according to this utility model;

[0030] Figure 2 This is a partial structural diagram of the oil-gas mixture input pipeline of a mobile dual-gas-path testing and metering device according to this utility model;

[0031] Figure 3 yes Figure 2 A top-down view;

[0032] Figure 4 This is a partial structural diagram of the dual-air-path pipeline of a mobile dual-air-path testing and measuring device according to this utility model;

[0033] Figure 5 This is a structural diagram of the test and measurement system of a mobile dual-air-path test and measurement device according to this utility model;

[0034] In the diagram: 11. Input pipe; 12. Input inclined pipe; 13. First ball valve; 21. Gas-liquid cyclone pipe; 22. Buffer separation pipe; 221. Gas outlet; 222. Pressure relief ball valve; 23. Gas-liquid control pipe; 231. Gas phase outlet; 232. Liquid phase outlet; 311. Large metering pipe; 312. Large-range gas phase mass flow meter; 313. Second ball valve; 321. Small metering pipe; 322. Small-range gas phase mass flow meter 323. Flow meter; 33. Main pipe; 41. Liquid phase delivery pipe; 42. Fourth ball valve; 43. Liquid phase mass flow meter; 51. Discharge pipe; 52. Fifth ball valve; 61. Mixing pipe; 62. Mixing ball valve; 7. Inlet / outlet connecting pipe; 71. Inlet / outlet connecting ball valve; 81. Sewage pipe; 82. Sewage valve; 9. Power supply box; 10. PLC control box; 100. Mounting frame; 101. Pressure transmitter. Detailed Implementation

[0035] 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.

[0036] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] like Figures 1 to 5 As shown, this utility model provides a mobile dual-air-path testing and measuring device, including a testing and measuring system. The testing and measuring system is installed on a fixed frame 100, which is used to support and move the testing and measuring system.

[0039] The testing and metering system includes an oil-gas mixture input pipeline, a gas-liquid separation pipeline, a dual-gas-path metering pipeline, a liquid-phase metering pipeline, and a gas-liquid mixture discharge pipeline. The output end of the oil-gas mixture input pipeline is connected to the gas-liquid separation pipeline, and the oil-gas mixture is delivered into the gas-liquid separation pipeline through the oil-gas mixture input pipeline.

[0040] The gas-liquid control pipe 23 in the gas-liquid separation pipeline is provided with a gas phase outlet 231 and a liquid phase outlet 232. The dual gas path metering pipeline includes a gas phase large-range metering pipeline and a gas phase small-range metering pipeline. The gas phase outlet 231 is connected to the input end of the gas phase large-range metering pipeline and the input end of the gas phase small-range metering pipeline respectively. The output end of the gas phase large-range metering pipeline is connected to the output end of the gas phase small-range metering pipeline and is connected to the input end of the gas-liquid mixture discharge pipeline.

[0041] The liquid phase outlet 232 is connected to the input end of the liquid phase metering pipeline, and the output end of the liquid phase metering pipeline is connected to the input end of the gas-liquid mixture discharge pipeline. The metered gas phase and liquid phase both enter the gas-liquid mixture discharge pipeline and are mixed and discharged.

[0042] An inlet / outlet connecting pipe 7 is provided between the inlet end of the oil-gas mixture input pipeline and the outlet end of the gas-liquid mixture discharge pipeline.

[0043] Specifically, such as Figure 2 and Figure 3 The gas-liquid separation pipeline also includes a gas-liquid cyclone pipe 21 and a buffer separation pipe 22. Both the gas-liquid cyclone pipe 21 and the gas-liquid control pipe 23 are vertically arranged. The two ends of the gas-liquid cyclone pipe 21 are connected to the two ends of the gas-liquid control pipe 23 respectively, and the connection forms a "D" shape. The buffer separation pipe 22 is vertically arranged between the gas-liquid cyclone pipe 21 and the gas-liquid control pipe 23. The two ends of the buffer separation pipe 22 are connected to the gas-liquid cyclone pipe 21 and the gas-liquid control pipe 23 respectively through a three-way pipe. The lower ends of the gas-liquid cyclone pipe 21, the buffer separation pipe 22 and the gas-liquid control pipe 23 are all connected to the drain pipe 81. The output end of the drain pipe 81 is connected to the input end of the discharge pipe 51 through a three-way pipe. The drain pipe 81 is equipped with a drain valve 82, so that the dirt or sediment generated during the gas-liquid separation process flows into the drain pipe 81 and is transported to the discharge pipe 51 for discharge.

[0044] The oil-gas mixture input pipeline includes an input pipe 11, an input inclined pipe 12, and a first ball valve 13. The output end of the input pipe 11 is connected to the input inclined pipe 12, and the output end of the input inclined pipe 12 is connected to the input port of the gas-liquid cyclone pipe 21. The first ball valve 13 is installed on the input end of the input pipe 11. The oil-gas mixture produced by the oil well is transported to the gas-liquid cyclone pipe 21 through the oil-gas mixture input pipeline. The gas-liquid cyclone pipe 21 is also called a cyclone separator. It uses the centrifugal force generated by the fluid rotation to efficiently separate the gas phase (gas) and the liquid phase (crude oil) with significant density differences. The gas-liquid cyclone pipe 21 works in conjunction with the buffer separation pipe 22 and the gas-liquid control pipe 23 to help ensure the stable cyclone state of the oil-gas mixture in the gas-liquid cyclone pipe 21. Due to the density difference between gas and liquid, the separated gas phase is at the upper end of the tube, while the liquid phase is at the lower end of the tube. They are output from the gas phase outlet 231 and the liquid phase outlet 232 of the gas-liquid control tube 23 to the flow meter for measurement.

[0045] It should be noted that this application designs the gas-liquid cyclone tube, buffer separation tube, and gas-liquid control tube used in gas-liquid separation as interconnected pipelines, which greatly simplifies the overall structure and reduces the number of pipes and ball valves used for pipeline connection when the original separate tank design was used, thereby saving costs. However, the working principle of the gas-liquid cyclone tube 21, buffer separation tube 22, and gas-liquid control tube 23 still adopts the existing technology, so their internal structure will not be described in detail.

[0046] like Figure 3 A fifth ball valve 52 is installed on the discharge pipe 51 in the gas-liquid mixture discharge pipeline. An inlet-outlet connecting pipe 7 is arranged between the discharge pipe 51 and the input pipe 11. The two ends of the inlet-outlet connecting pipe 7 are connected to the discharge pipe 51 and the input pipe 11 respectively through a tee pipe. An inlet-outlet connecting ball valve 71 is provided on the inlet-outlet connecting pipe 7. When the test and metering system needs maintenance, the first ball valve 13 on the input pipe 11 and the fifth ball valve 52 on the discharge pipe 51 are closed, and the inlet-outlet connecting ball valve 71 on the inlet-outlet connecting pipe 7 is opened. This prevents the oil input from the oil well to the test and metering system from entering the test and metering system. Instead, the oil flows from the inlet-outlet connecting pipe 7 to the discharge pipe 51, thus eliminating the need to shut down the oil well when the test and metering system is maintained.

[0047] Specifically, such as Figure 4 As shown, the large-range gas phase metering pipeline includes a large metering pipe 311, a large-range gas phase mass flow meter 312, and a second ball valve 313. Two second ball valves 313 and a large-range gas phase mass flow meter 312 are connected in sequence on the large metering pipe 311. The large-range gas phase mass flow meter 312 is arranged between the two second ball valves 313.

[0048] The gas phase small-range metering pipeline includes a small metering tube 321, a small-range gas phase mass flow meter 322, and a third ball valve 323. Two third ball valves 323 and the small-range gas phase mass flow meter 322 are connected in sequence on the small metering tube 321. The small-range gas phase mass flow meter 322 is arranged between the two third ball valves 323.

[0049] The gas phase outlet 231 on the gas-liquid control pipe 23 is connected to the input end of the large metering pipe 311 and the input end of the small metering pipe 321 respectively through a three-way pipe. By manually opening the second ball valve 313 on the large gas phase metering pipeline or the third ball valve 323 on the small gas phase metering pipeline, or by opening both pipelines at the same time, the measurement route can be switched at different flow rates, the measurement range can be widened, and the measurement accuracy can be ensured.

[0050] The output end of the large metering tube 311 and the output end of the small metering tube 321 are connected and connected to the input end of the main tube 33 through a three-way pipe. After the measured gas enters the main tube 33, it is transported to the mixing tube 61 and mixed with the measured liquid before being discharged.

[0051] An outlet 221 is provided at the upper end of the buffer separation pipe 22. The outlet 221 of the buffer separation pipe 22 is connected to the input end of the large metering pipe 311 through a connecting pipe. A pressure relief ball valve 222 is installed on the connecting pipe. When the flow rate is large, the pressure relief ball valve 222 is opened to allow the gas in the buffer separation pipe 22 to be discharged into the large metering pipe 311, thereby venting the buffer separation pipe 22 and preventing pressure buildup in the buffer separation pipe 22.

[0052] The liquid phase metering pipeline includes a liquid phase delivery pipe 41, a fourth ball valve 42, and a liquid phase mass flow meter 43. The fourth ball valve 42 and the liquid phase mass flow meter 43 are installed sequentially on the liquid phase delivery pipe 41, and the fourth ball valve 42 is located at the input end of the liquid phase delivery pipe 41. The input end of the liquid phase delivery pipe 41 is connected to the liquid phase outlet 232 of the gas-liquid control pipe 23. The output end of the liquid phase delivery pipe 41 is connected to the output end of the main pipe 33 through a three-way pipe and to the input end of the mixing pipe 6. A mixing ball valve 61 is installed on the input end of the mixing pipe 6. When the testing and metering device is working, the mixing ball valve 62 and the fifth ball valve 52 are opened, so that the gas in the main pipe 33 and the measured liquid in the liquid phase delivery pipe 41 are mixed in the mixing pipe 6 and transported to the discharge pipe 51 for discharge.

[0053] like Figure 5 Pressure transmitters 101 are installed on the main pipe 33 and the input pipe 11, and as follows: Figure 1The mounting bracket 100 houses a power supply box 9 and a PLC control box 10. These two boxes are electrically connected to a pressure transmitter 101, a large-range gas mass flow meter 312, a small-range gas mass flow meter 322, and a liquid mass flow meter 43, respectively. This allows detection and metering data to be transmitted to the PLC control box 10 for display. The pressure transmitter 101 detects pipeline pressure; if an abnormal pressure occurs, the PLC control box will alarm to promptly identify problems, such as pipeline leaks or abnormal downhole pressure. It should be noted that the pressure transmitter 101, the large-range gas mass flow meter 312, the small-range gas mass flow meter 322, and the liquid mass flow meter 43 are all existing commercially available equipment; therefore, their specific structures will not be described in detail.

[0054] The working principle and process of this utility model are as follows:

[0055] The testing and metering system in the mobile dual-gas-path testing and metering device is installed on the fixed frame 100. The fixed frame 100 enables the testing and metering system to be moved. The metering device can be moved or placed at the test wellhead by using lifting lugs set at the four corners of the fixed frame 100 and hoisting equipment.

[0056] When it is necessary to measure the production of fluid from an oil well and the production of gas from a single well, the first ball valve 13 is opened, allowing the oil-gas mixture to pass through the oil-gas mixture input pipeline and be transported into the gas-liquid cyclone pipe 21 for gas-liquid separation.

[0057] The separated gas is output from the gas phase outlet 231 of the gas-liquid control pipe 23 and enters the dual gas path metering pipeline for gas metering. Operators measure the gas by judging the flow rate of the oil-gas mixture in the following three ways:

[0058] When the flow rate is low, open the third ball valve 323 on the small-range gas phase metering pipeline and close the second ball valve 313. Measure the flow rate through the small-range gas phase mass flow meter 322 to avoid the flow rate being lower than the lower limit of the large range and to ensure measurement accuracy.

[0059] When the flow rate is large, open the second ball valve 313 on the large range gas phase metering pipeline and close the third ball valve 323. The large range gas phase mass flow meter 312 is used for measurement to prevent the flow rate from exceeding the upper limit of the small range when it is large, thus protecting the equipment.

[0060] When the flow rate is moderate, the second ball valve 313 and the third ball valve 323 are opened simultaneously, and both channels are opened for measurement. The flow meter readings are added together to cover the intermediate range that cannot be adapted by a single channel, thus solving the problem of large accuracy deviation when using single-channel measurement and achieving a wider measurement range.

[0061] During measurement, the fourth ball valve 42, the mixing ball valve 62, and the fifth ball valve 52 are all in the open state. The separated liquid is output from the liquid phase outlet 232 of the gas-liquid control pipe 23 and enters the liquid phase mass flow meter 43 for measurement. The measured liquid and gas both enter the mixing pipe 61 and are discharged through the discharge pipe 51.

[0062] After the measurement is completed, close the first ball valve 13, the second ball valve 313, the third ball valve 323, the fourth ball valve 42, and the mixing ball valve 62 on the dual gas metering pipeline, and open the drain valve 82. The dirt and sediment generated by oil-gas separation in the gas-liquid cyclone pipe 21, the buffer separation pipe 22, and the gas-liquid control pipe 23 will flow from the drain pipe 81 into the discharge pipe 51 and be discharged.

[0063] When the testing and metering system needs maintenance, the first ball valve 13 on the input pipe 11 and the fifth ball valve 52 on the discharge pipe 51 are both closed. At this time, the inlet and outlet connecting ball valve 71 on the inlet and outlet connecting pipe 7 is opened, so that the oil and gas mixture does not enter the testing and metering system, but flows directly to the discharge pipe 51 through the inlet and outlet connecting pipe 7 for discharge, so that the oil well does not need to be shut down when the testing and metering system is maintained.

[0064] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A mobile dual-air-path testing and measuring device, characterized in that, Includes a testing and measurement system, which is mounted on a fixed frame (100) for supporting and moving the testing and measurement system; The testing and metering system includes an oil-gas mixture input pipeline, a gas-liquid separation pipeline, a dual-gas-path metering pipeline, a liquid-phase metering pipeline, and a gas-liquid mixture discharge pipeline. The output end of the oil-gas mixture input pipeline is connected to the gas-liquid separation pipeline, and the oil-gas mixture is delivered to the gas-liquid separation pipeline through the oil-gas mixture input pipeline. The gas-liquid control pipe (23) in the gas-liquid separation pipeline is provided with a gas phase outlet (231) and a liquid phase outlet (232). The dual gas path metering pipeline includes a gas phase large-range metering pipeline and a gas phase small-range metering pipeline. The gas phase outlet (231) is connected to the input end of the gas phase large-range metering pipeline and the input end of the gas phase small-range metering pipeline, respectively. The output end of the gas phase large-range metering pipeline is connected to the output end of the gas phase small-range metering pipeline and is connected to the input end of the gas-liquid mixture discharge pipeline. The liquid phase outlet (232) is connected to the input end of the liquid phase metering pipeline, and the output end of the liquid phase metering pipeline is connected to the input end of the gas-liquid mixture discharge pipeline. The metered gas phase and liquid phase both enter the gas-liquid mixture discharge pipeline and are mixed and discharged. An inlet / outlet connecting pipe (7) is provided between the inlet end of the oil-gas mixture input pipeline and the outlet end of the gas-liquid mixture discharge pipeline.

2. The mobile dual-air-path testing and measuring device according to claim 1, characterized in that, The gas-liquid separation pipeline also includes a gas-liquid cyclone pipe (21) and a buffer separation pipe (22). The gas-liquid cyclone pipe (21) and the gas-liquid control pipe (23) are both arranged vertically. The two ends of the gas-liquid cyclone pipe (21) are respectively connected to the two ends of the gas-liquid control pipe (23) and the connection forms a "D" shaped structure. The buffer separation pipe (22) is arranged vertically between the gas-liquid cyclone pipe (21) and the gas-liquid control pipe (23). The two ends of the buffer separation pipe (22) are respectively connected to the gas-liquid cyclone pipe (21) and the gas-liquid control pipe (23) through a three-way pipe.

3. The mobile dual-air-path testing and measuring device according to claim 2, characterized in that, The gas phase large-range metering pipeline includes a large metering pipe (311), a large-range gas phase mass flow meter (312), and a second ball valve (313). Two second ball valves (313) and the large-range gas phase mass flow meter (312) are connected in sequence on the large metering pipe (311). The large-range gas phase mass flow meter (312) is arranged between the two second ball valves (313). The gas phase small-range metering pipeline includes a small metering tube (321), a small-range gas phase mass flow meter (322), and a third ball valve (323). Two third ball valves (323) and the small-range gas phase mass flow meter (322) are connected in sequence on the small metering tube (321). The small-range gas phase mass flow meter (322) is arranged between the two third ball valves (323). The gas phase outlet (231) on the gas-liquid control pipe (23) is connected to the input end of the large metering pipe (311) and the input end of the small metering pipe (321) respectively through a three-way pipe. The output end of the large metering pipe (311) and the output end of the small metering pipe (321) are connected and connected to the input end of the main pipe (33) through a three-way pipe.

4. The mobile dual-air-path testing and measuring device according to claim 3, characterized in that, The buffer separation pipe (22) is provided with an air outlet (221) at the upper end. The air outlet (221) of the buffer separation pipe (22) is connected to the input end of the large metering pipe (311) through a connecting pipe, and a pressure relief ball valve (222) is installed on the connecting pipe.

5. A mobile dual-air-path testing and measuring device according to claim 2, characterized in that, The oil-gas mixture input pipeline includes an input pipe (11), an input inclined pipe (12), and a first ball valve (13). The output end of the input pipe (11) is connected to the input inclined pipe (12), and the output end of the input inclined pipe (12) is connected to the input port of the gas-liquid cyclone pipe (21). The first ball valve (13) is installed on the input end of the input pipe (11).

6. A mobile dual-air-path testing and measuring device according to claim 3, characterized in that, The liquid phase metering pipeline includes a liquid phase delivery pipe (41), a fourth ball valve (42), and a liquid phase mass flow meter (43). The fourth ball valve (42) and the liquid phase mass flow meter (43) are installed sequentially on the liquid phase delivery pipe (41), and the fourth ball valve (42) is located at the input end of the liquid phase delivery pipe (41). The input end of the liquid phase delivery pipe (41) is connected to the liquid phase outlet (232) of the gas-liquid control pipe (23).

7. A mobile dual-air-path testing and measuring device according to claim 6, characterized in that, The output end of the liquid phase delivery pipe (41) and the output end of the main pipe (33) are connected to the input end of the mixing pipe (61) through a three-way pipe. A mixing ball valve (62) is installed on the input end of the mixing pipe (61).

8. A mobile dual-air-path testing and measuring device according to claim 7, characterized in that, The gas-liquid mixture discharge pipeline includes a discharge pipe (51) and a fifth ball valve (52). The input end of the discharge pipe (51) is connected to the output end of the mixing pipe (61). The fifth ball valve (52) is installed on the discharge pipe (51). An inlet-outlet connecting pipe (7) is arranged between the discharge pipe (51) and the input pipe (11). The two ends of the inlet-outlet connecting pipe (7) are connected to the discharge pipe (51) and the input pipe (11) respectively through a three-way pipe. An inlet-outlet connecting ball valve (71) is provided on the inlet-outlet connecting pipe (7).

9. A mobile dual-air-path testing and measuring device according to claim 8, characterized in that, The lower ends of the gas-liquid cyclone pipe (21), the buffer separation pipe (22), and the gas-liquid control pipe (23) are all connected to the drain pipe (81). The output end of the drain pipe (81) is connected to the input end of the discharge pipe (51) through a three-way pipe. The drain pipe (81) is equipped with a drain valve (82).

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