An oilfield gas flow measurement device

Abstract

The present application provides a kind of oil field gas flow measuring device, including first connector and second connector, first connector and second connector between installation are equipped with first connecting pipe, second connecting pipe and third connecting pipe, first valve core is installed in first connector, second valve core is installed in second connector, first connecting pipe, second connecting pipe and third connecting pipe correspond with first valve core and second valve core.The present application can guarantee the normal progress of transport work, improve work efficiency, and when one of connecting pipe works, the gas pressure in the other two connecting pipes is in a constant state, so as to facilitate the measurement of oil field gas flow, improve measurement efficiency;Different flow measurement methods can be selected according to demand to measure the flow of oil field gas, thereby expanding the application range of the device, and the measurement structure in one of the connecting pipes can be measured through other structures when it is damaged, to ensure normal operation.

Description

Technical Field

[0001] This invention relates to the field of gas flow measurement technology, specifically to an oilfield gas flow measurement device. Background Technology

[0002] During oilfield extraction, some gases are present within the oilfield. These gases can be processed and utilized. Currently, most oilfield gas flow rate measurements use turbine flow meters or thermal flow meters. For example, patent CN205154138U discloses a device for measuring gas flow rate in oilfield gas storage tanks. This device includes an inner wall of a gas testing channel, a heating unit, a temperature sensor array, and a housing. Its key structural features include the heating unit positioned on the outer side of the inner wall of the gas testing channel, the temperature sensor array positioned on the outer side of the heating unit, and the housing surrounding the temperature sensor array. The outer side of the inner wall of the gas testing channel is connected to the heating unit. A first insulating layer is provided between the heating unit and the temperature sensor array, and between the temperature sensor array and the outer shell. This device measures the flow rate of oilfield gas by heating the oilfield gas and monitoring the temperature changes of the oilfield gas at different locations. However, when the oilfield gas is heated, the thermal expansion of the oilfield gas will affect the flow rate, resulting in a large error in the measurement of the oilfield gas flow rate. In addition, the composition of oilfield gas at different locations may vary. When heating the oilfield gas, it will cause calculation errors for gases with different composition contents, affecting the accuracy of the measurement results.

[0003] Therefore, the present invention provides an oilfield gas flow measurement device. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an oilfield gas flow measurement device to solve the problems mentioned in the background section. This invention ensures the normal operation of transportation work, improves work efficiency, and maintains a constant gas pressure in the other two connecting pipes while one pipe is operational, facilitating the measurement of oilfield gas flow and improving measurement efficiency. Different flow measurement methods can be selected according to requirements, expanding the device's applicability. Furthermore, even if the measurement structure in one connecting pipe is damaged, measurement can be performed using other structures, ensuring normal operation. The device can also measure the gas pressure in the inlet pipe, allowing for the selection of appropriate methods based on the pressure reading. The flow measurement structure can sample oilfield gas to detect its specific components. The heating temperature of the thermal flow measurement structure can be manually controlled based on the detection results, reducing measurement errors. Furthermore, flow can be measured using an orifice plate flow meter composed of a turbine flow measurement structure and an orifice plate. Multiple measurement results can be compared to ensure accuracy. The turbine flow measurement structure can be cooled to prevent friction and heat generation between it and the oilfield gas, ensuring lubrication and reducing friction. This also prevents excessively high blowout temperatures, minimizing the impact of elevated oilfield gas temperatures on subsequent use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an oilfield gas flow measurement device, comprising a first connector and a second connector, wherein a first connecting pipe, a second connecting pipe, and a third connecting pipe are installed between the first connector and the second connector; a first valve core is installed inside the first connector; a second valve core is installed inside the second connector; the first connecting pipe, the second connecting pipe, and the third connecting pipe correspond to the first valve core and the second valve core; a pressure detection structure is installed on the second valve core; a sampling structure is installed on the first connecting pipe; a thermal flow measurement structure is installed on the second connecting pipe; a turbine flow measurement structure is installed inside the third connecting pipe; a cooling structure is installed on the third connecting pipe; the cooling structure corresponds to the turbine flow measurement structure and the second connecting pipe; and an orifice plate is installed on one side of the turbine flow measurement structure.

[0006] Furthermore, the first connector is rotatably connected to the first valve core, an air inlet pipe is fixed on the first connector, a first motor is fixed on the first connector, the output end of the first motor is fixedly connected to the first valve core, a communication port is opened inside the first valve core, and multiple first connection ports are opened on the periphery of the first valve core. The first connection ports are connected to the communication port, and the multiple first connection ports are respectively connected to the air inlet pipe, the first connection pipe, the second connection pipe and the third connection pipe.

[0007] Furthermore, the second connector is rotatably connected to the second valve core, an air outlet pipe is fixed on the second connector, a second motor is fixed on the second connector, the output end of the second motor is fixedly connected to the second valve core, a second connection port is opened inside the second valve core, the second connection port has an L-shaped structure, the second connection port is connected to the air outlet pipe, and the second connection port corresponds to the first connection pipe, the second connection pipe and the third connection pipe.

[0008] Furthermore, the pressure detection structure includes multiple first pressure sensors, and multiple grooves are formed on the periphery of the second valve core. The first pressure sensors are fixed in the grooves. The first pressure sensors correspond to the first connecting pipe, the second connecting pipe and the third connecting pipe. The first connecting pipe, the second connecting pipe and the third connecting pipe are all fixedly connected to the first connector and the second connector.

[0009] Furthermore, the sampling structure includes a sampling box fixed to the first connecting pipe, the sampling box being located in the middle of the first connecting pipe, a connecting pipe being provided inside the sampling box and connected to the first connecting pipe, a sampling port being provided at the bottom of the sampling box, a sampling tube being slidably fitted inside the sampling port, a blocking block being elastically fitted inside the sampling port, a sealing plate and a fixing plate being fixed inside the sampling port, a spring being fixed between the fixing plate and the blocking block, and a connecting rod being fixed between the blocking block and the sampling tube, the connecting rod being a T-shaped structure.

[0010] Furthermore, the thermal flow measurement structure includes an electric heating tube fixed inside the second connecting tube, a first temperature sensor and a second temperature sensor fixed on the second connecting tube, the first temperature sensor being located inside the second connecting tube on the side closer to the electric heating tube, the second temperature sensor being located inside the second connecting tube on the side farther from the electric heating tube, and a second pressure sensor being fixed at the end of the second connecting tube away from the electric heating tube.

[0011] Furthermore, the turbine flow measurement structure includes a fixed tube installed inside the third connecting pipe, a rotating tube installed inside the fixed tube, and multiple turbine blades fixed inside the rotating tube. The fixed tube is fixedly connected to the third connecting pipe, and the rotating tube is rotatably connected to the fixed tube.

[0012] Furthermore, the perforated plate is fixedly connected to the fixed tube, and the perforated plate is located at one end of the fixed tube near the first connector. An air hole is opened in the perforated plate, and a third air pressure sensor is fixed in the fixed tube. The third air pressure sensor is located on one side of the perforated plate and is in contact with the perforated plate.

[0013] Furthermore, the cooling structure includes a coolant tank fixed to the third connecting pipe, a liquid pump fixed inside the coolant tank, coolant inside the coolant tank, a cooler fixed inside the coolant tank, and a cooling structure installed inside the third connecting pipe, the cooling structure corresponding to the fixed pipe and the liquid pump.

[0014] Furthermore, a first cooling pipe is fixed inside the third connecting pipe. The first cooling pipe has an S-shaped structure and is located around the fixed pipe. The first cooling pipe is connected to the output end of the liquid pump. A second cooling pipe is installed at the end of the second connecting pipe near the second connector. The second cooling pipe has an S-shaped structure. A fourth connecting pipe is fixed between the first cooling pipe and the second cooling pipe. A fifth connecting pipe is installed between the second cooling pipe and the coolant tank.

[0015] The beneficial effects of this invention are:

[0016] 1. Installing a first connecting pipe, a second connecting pipe, and a third connecting pipe between the first and second connectors allows for the transport of oilfield gas through these pipes. This facilitates maintenance of the first, second, and third connecting pipes. When one pipe is under maintenance, the other two can continue transporting oilfield gas without shutting it down, ensuring normal operation and improving efficiency. Furthermore, when one connecting pipe is in operation, the gas pressure in the other two pipes remains constant, facilitating the measurement of oilfield gas flow rate and improving measurement efficiency.

[0017] 2. A first valve core is rotatably installed inside the first connector, and a second valve core is rotatably installed inside the second connector. The flow between the first, second, and third connecting pipes can be controlled by rotating the first and second valve cores, thereby allowing the first, second, or third connecting pipes to be shut off. Different flow measurement methods can be selected as needed to measure the flow rate of oilfield gas, thus expanding the applicability of the device. Furthermore, if the measuring structure in one of the connecting pipes is damaged, measurements can be taken using other structures, ensuring normal operation.

[0018] 3. Install a pressure detection structure on the second valve core. The pressure detection structure can monitor the air pressure in the connecting pipe where there is no gas flow, thereby measuring the air pressure in the inlet pipe and selecting an appropriate flow measurement structure based on the air pressure.

[0019] 4. A sampling structure is installed on the first connecting pipe, a thermal flow measurement structure is installed on the second connecting pipe, and a turbine flow measurement structure is installed inside the third connecting pipe. An orifice plate is installed on one side of the turbine flow measurement structure. Sampling can be performed through the sampling structure to detect the specific components in the oilfield gas. The heating temperature of the thermal flow measurement structure can be manually controlled based on the detection results to reduce the measurement error of the thermal flow measurement structure. The flow rate can be measured by the orifice plate flow meter composed of the turbine flow measurement structure and the orifice plate. Multiple measurement results can be compared to ensure the accuracy of the measurement results.

[0020] 5. Installing a cooling structure on the third connecting pipe can cool the turbine flow measurement structure, preventing friction between the turbine flow measurement structure and the oilfield gas that could cause heat generation. This ensures the lubrication effect of the turbine flow measurement structure, reduces friction, and also cools the second connecting pipe. This cools the oilfield gas heated by the thermal flow measurement structure, preventing excessively high blowout temperatures and reducing the impact of elevated oilfield gas temperatures on subsequent use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of an oilfield gas flow measurement device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the assembly cross-sectional structure of the first connector, the second connector, and the second connecting pipe in an oilfield gas flow measurement device of the present invention.

[0023] Figure 3 This is a schematic diagram of the overall assembly cross-sectional structure of an oilfield gas flow measurement device according to the present invention;

[0024] Figure 4 This is a schematic diagram of the assembly cross-sectional structure of the first connecting pipe, the second connecting pipe, and the third connecting pipe in an oilfield gas flow measurement device of the present invention.

[0025] Figure 5 This is a schematic diagram of the assembly structure of the first connecting pipe, the second connecting pipe, and the third connecting pipe in an oilfield gas flow measurement device according to the present invention.

[0026] Figure 6 This is a schematic diagram of the assembly cross-sectional structure of the sampling box in an oilfield gas flow measurement device according to the present invention;

[0027] Figure 7 for Figure 6 A schematic diagram at point A in the middle;

[0028] Figure 8 This is a schematic diagram of the assembly cross-sectional structure of the third connecting pipe in an oilfield gas flow measurement device according to the present invention.

[0029] Figure 9 This is a schematic diagram of the assembly cross-sectional structure of the second connecting pipe in an oilfield gas flow measurement device according to the present invention.

[0030] Figure 10 This is a schematic cross-sectional view of the first valve core in an oilfield gas flow measurement device according to the present invention.

[0031] Figure 11 This is a schematic diagram of the assembly cross-sectional structure of the second valve core in an oilfield gas flow measurement device according to the present invention.

[0032] In the diagram: 1. First connector; 101. First valve core; 102. First motor; 103. Connecting port; 104. First connecting port; 2. Second connector; 201. Second valve core; 202. Second motor; 203. Second connecting port; 204. Groove; 205. First air pressure sensor; 3. Inlet pipe; 4. Outlet pipe; 5. First connecting pipe; 6. Second connecting pipe; 7. Third connecting pipe; 8. Sampling box; 9. Connecting pipe; 10. Sampling port; 11. Sampling tube; 12. 13. Sealing plate; 14. Block; 15. Fixing plate; 16. Spring; 17. Connecting rod; 18. Heating element; 19. First temperature sensor; 20. Second temperature sensor; 21. Second air pressure sensor; 22. First cooling pipe; 23. Second cooling pipe; 24. Fourth connecting pipe; 25. Coolant tank; 26. Liquid pump; 27. Refrigerator; 28. Orifice plate; 29. ​​Fixing pipe; 30. Rotating pipe; 31. Turbine blade; 32. Third air pressure sensor; 33. Fifth connecting pipe. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] Please see Figures 1 to 11 The present invention provides a technical solution: an oilfield gas flow measurement device, comprising a first connector 1 and a second connector 2, wherein a first connecting pipe 5, a second connecting pipe 6 and a third connecting pipe 7 are installed between the first connector 1 and the second connector 2, a first valve core 101 is installed inside the first connector 1, and a second valve core 201 is installed inside the second connector 2, the first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7 correspond to the first valve core 101 and the second valve core 201, a pressure detection structure is installed on the second valve core 201, a sampling structure is installed on the first connecting pipe 5, a thermal flow measurement structure is installed on the second connecting pipe 6, a turbine flow measurement structure is installed inside the third connecting pipe 7, and a cooling structure is installed on the third connecting pipe 7, the cooling structure corresponding to the turbine flow measurement structure and the second connecting pipe 6, and an orifice plate 27 is installed on one side of the turbine flow measurement structure.

[0035] In this embodiment, the first connector 1 is rotatably connected to the first valve core 101. An air inlet pipe 3 is fixed on the first connector 1. A first motor 102 is fixed on the first connector 1. The output end of the first motor 102 is fixedly connected to the first valve core 101. A communication port 103 is opened inside the first valve core 101. Multiple first connection ports 104 are opened on the periphery of the first valve core 101. The first connection ports 104 are connected to the communication port 103. The multiple first connection ports 104 are respectively connected to the air inlet pipe 3, the first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7.

[0036] Specifically, starting the first motor 102 drives the first valve core 101 to rotate, thereby causing the first connection port 104 to rotate. One of the first connection ports 104 is in a normally open state with the air inlet pipe 3. Even when the first valve core 101 rotates, the first connection port 104 remains connected to the air inlet pipe 3, thus ensuring air intake. The other first connection ports 104 are connected to the first connecting pipe 5, the second connecting pipe 6, and the third connecting pipe 7, respectively. When the first valve core 101 rotates, one of the first connection ports 104 is not connected to the outside. For example, when the first motor 102 is started, the first motor 102 drives the first valve core 101 to rotate. At this time, the first connection port 104 is misaligned with the first connecting pipe 5. Thus, the gas in the air inlet pipe 3 can pass through the first connection port 104 into the second connecting pipe 6 and the third connecting pipe 7, thereby preventing air from entering the first connecting pipe 5 and allowing the oilfield gas in the first connecting pipe 5 to be discharged, facilitating the sampling of the oilfield gas.

[0037] The second connector 2 is rotatably connected to the second valve core 201. An air outlet pipe 4 is fixed on the second connector 2. A second motor 202 is fixed on the second connector 2. The output end of the second motor 202 is fixedly connected to the second valve core 201. A second connection port 203 is opened inside the second valve core 201. The second connection port 203 has an L-shaped structure and is connected to the air outlet pipe 4. The second connection port 203 corresponds to the first connection pipe 5, the second connection pipe 6 and the third connection pipe 7.

[0038] Specifically, the second connection port 203 is always connected to the air outlet pipe 4. When the second motor 202 is started, the second valve core 201 is rotated by the second motor 202, thereby connecting the second connection port 203 to the first connection pipe 5, the second connection pipe 6 and the third connection pipe 7. When the second connection port 203 is connected to one of the connection pipes, the air pressure in the other two connection pipes is constant and the same as the air pressure in the air inlet pipe 3. Therefore, it is more convenient to test the air pressure. The flow rate can be easily judged by the air pressure, so the appropriate measurement method can be selected according to the flow rate.

[0039] The pressure detection structure includes multiple first pressure sensors 205. Multiple grooves 204 are provided on the periphery of the second valve core 201. The first pressure sensors 205 are fixed in the grooves 204. The first pressure sensors 205 correspond to the first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7. The first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7 are all fixedly connected to the first connector 1 and the second connector 2.

[0040] Specifically, the first air pressure sensor 205 can measure the air pressure inside the first connecting pipe 5, the second connecting pipe 6, or the third connecting pipe 7 that is not open to air, thereby measuring the air pressure in the air inlet pipe 3. As the second valve core 201 rotates, the first air pressure sensor 205 will also rotate, thus allowing for more flexible adjustment of the measuring connecting pipe and ensuring the accuracy of the measurement results.

[0041] The sampling structure includes a sampling box 8 fixed to the first connecting pipe 5. The sampling box 8 is located in the middle of the first connecting pipe 5. A connecting pipe 9 is opened inside the sampling box 8 and is connected to the first connecting pipe 5. A sampling port 10 is opened at the bottom of the sampling box 8. A sampling pipe 11 is slidably fitted inside the sampling port 10. A blocking block 13 is elastically fitted inside the sampling port 10. A sealing plate 12 and a fixing plate 14 are fixed inside the sampling port 10. A spring 15 is fixed between the fixing plate 14 and the blocking block 13. A connecting rod 16 is fixed between the blocking block 13 and the sampling pipe 11. The connecting rod 16 has a T-shaped structure.

[0042] Specifically, when measuring the flow rate of oilfield gas through the first connecting pipe 5, the gas is completely discharged through the sampling port 10 for sampling. This allows workers to detect the composition and content of the oilfield gas, thereby determining its density and ensuring the accuracy of the flow rate measurement. The first connecting pipe 5 is completely separated by the first valve core 101 and the second valve core 201, and then the gas inside the first connecting pipe 5 is discharged. At this time, the gas pressure inside the first connecting pipe 5 is the same as atmospheric pressure. Then, the first valve core 101 is rotated to allow the oilfield gas to enter the first connecting pipe 5. The first pressure sensor 205 can then determine the pressure change inside the first connecting pipe 5 per unit time, and the flow rate of the oilfield gas can be calculated. This enables the measurement of the oilfield gas flow rate, and workers can sample the gas to detect its composition and content, ensuring the accuracy of the measurement results.

[0043] The thermal flow measurement structure includes an electric heating tube 17 fixed inside a second connecting tube 6. A first temperature sensor 18 and a second temperature sensor 19 are fixed on the second connecting tube 6. The first temperature sensor 18 is located inside the second connecting tube 6 on the side closer to the electric heating tube 17, and the second temperature sensor 19 is located inside the second connecting tube 6 on the side away from the electric heating tube 17. A second pressure sensor 20 is fixed at the end of the second connecting tube 6 away from the electric heating tube 17.

[0044] Specifically, at this time, the second connecting pipe 6 is connected to the inlet pipe 3 and the outlet pipe 4, that is, the oilfield gas is transported through the second connecting pipe 6. It can be heated by the electric heating tube 17. The temperature change at two different locations is judged by the first temperature sensor 18 and the second temperature sensor 19, so the flow rate of the oilfield gas can be measured by temperature. Furthermore, the gas pressure in the second connecting pipe 6 can be detected by the second pressure sensor 20 and compared with the gas pressure detected by the first pressure sensor 205, so as to determine whether the heating of the electric heating tube 17 has a significant impact on the gas pressure of the oilfield gas, thus ensuring the accuracy of the measurement results.

[0045] The turbine flow measurement structure includes a fixed pipe 28 installed inside the third connecting pipe 7, a rotating pipe 29 installed inside the fixed pipe 28, and multiple turbine blades 30 fixed inside the rotating pipe 29. The fixed pipe 28 is fixedly connected to the third connecting pipe 7, and the rotating pipe 29 is rotatably connected to the fixed pipe 28. An orifice plate 27 is fixedly connected to the fixed pipe 28 and is located at one end of the fixed pipe 28 near the first connecting head 1. An air hole is opened in the orifice plate 27. A third air pressure sensor 31 is fixed inside the fixed pipe 28 and is located on one side of the orifice plate 27 and is in contact with the orifice plate 27. A speed sensor is installed inside the fixed pipe 28 to monitor the speed of the rotating pipe 29.

[0046] Specifically, oilfield gas is transported through the third connecting pipe 7, which is connected to the inlet pipe 3 and the outlet pipe 4. At this time, the oilfield gas blows through the orifice plate 27, thereby generating a pressure difference on both sides of the orifice plate 27, making the orifice plate 27 an orifice plate flow meter. The pressure difference can be obtained by comparing the detection results of the third pressure sensor 31 and the first pressure sensor 205, and then used to calculate the flow rate of the oilfield gas. When the oilfield gas blows through the turbine blade 30, the gas can drive the turbine blade 30 to rotate, thereby driving the rotating pipe 29 to rotate. The rotation speed of the rotating pipe 29 is detected by the speed sensor, and the flow rate is calculated based on the speed. This is compared with the flow rate obtained by the orifice plate flow meter to prevent large errors.

[0047] The cooling structure includes a coolant tank 24 fixed to the third connecting pipe 7, a liquid pump 25 fixed inside the coolant tank 24, coolant inside the coolant tank 24, a cooler 26 fixed inside the coolant tank 24, a cooling structure inside the third connecting pipe 7, the cooling structure corresponding to the fixed pipe 28 and the liquid pump 25, a first cooling pipe 21 fixed inside the third connecting pipe 7, the first cooling pipe 21 having an S-shaped structure, the first cooling pipe 21 being located on the periphery of the fixed pipe 28, the first cooling pipe 21 being connected to the output end of the liquid pump 25, a second cooling pipe 22 being installed at the end of the second connecting pipe 6 near the second connector 2, the second cooling pipe 22 having an S-shaped structure, a fourth connecting pipe 23 fixed between the first cooling pipe 21 and the second cooling pipe 22, and a fifth connecting pipe 32 installed between the second cooling pipe 22 and the coolant tank 24.

[0048] Specifically, starting the liquid pump 25 allows the coolant in the coolant tank 24 to be pumped into the first cooling pipe 21 and the second cooling pipe 22. This cools the oilfield gas inside the turbine blade 30, the rotating pipe 29, and the third connecting pipe 7, preventing the turbine blade 30 and the rotating pipe 29 from heating up due to friction with the gas. It also prevents the lubricant around the rotating pipe 29 from becoming less effective due to increased temperature, ensuring the rotation of the rotating pipe 29, reducing friction generated by the rotation of the rotating pipe 29, and cooling the oilfield gas in the third connecting pipe 7 that has heated up due to heating. This ensures that the output oilfield gas temperature is not too high, preventing the oilfield gas temperature from affecting subsequent operations.

[0049] Workflow: When sampling the flow rate of oilfield gas using sampling box 8, the first motor 102 is started. The first motor 102 drives the first valve core 101 to rotate. At this time, the first connection port 104 is misaligned with the first connecting pipe 5, so that the gas in the inlet pipe 3 can pass through the first connection port 104 into the second connecting pipe 6 and the third connecting pipe 7, thus preventing gas from entering the first connecting pipe 5. Then, the second motor 202 is started, which drives the second valve core 201 to rotate, thereby connecting the second connection port 203 to the second connecting pipe 6 or the third connecting pipe 7. At this time, the first connecting pipe 5 is in a state of no gas intake or output. The operator can manually push the sampling tube 11 upward, so that the sampling tube 11 pushes the block 13 and spring 15 upward through the connecting rod 16. When stretched, the plug 13 is no longer in contact with the sealing plate 12. At this time, the oilfield gas in the first connecting pipe 5 can be blown out through the sampling pipe 11, so that the oilfield gas can be collected and sampled. After sampling is completed, the gas pressure in the first connecting pipe 5 drops. The gas pressure is monitored by the first gas pressure sensor 205. Then, the sampling pipe 11 is released, and the spring 15 rebounds to drive the sampling pipe 11 to reset. The plug 13 contacts the sealing plate 12 to ensure a seal. Then, the first motor 102 is started, and the first motor 102 drives the first valve core 101 to rotate, so that the first connection port 104 is connected to the first connecting pipe 5. At this time, the oilfield gas enters the first connecting pipe 5, and the pressure on the first gas pressure sensor 205 changes. The flow rate of the oilfield gas can be obtained according to the change in gas pressure per unit time.

[0050] When the flow rate of oilfield gas is delivered through the second connecting pipe 6, the first motor 102 and the second motor 202 are started, connecting the second connecting pipe 6 to the inlet pipe 3 and the outlet pipe 4. Then, the gas is heated by the electric heating tube 17. The first temperature sensor 18 and the second temperature sensor 19 determine the temperature changes at two different locations, thereby measuring the flow rate of the oilfield gas by temperature. The second pressure sensor 20 detects the gas pressure in the second connecting pipe 6 and compares it with the gas pressure detected by the first pressure sensor 205 to determine whether the heating by the electric heating tube 17 has a significant impact on the gas pressure of the oilfield gas. The liquid pump 25 is then started, which delivers the coolant from the coolant tank 24 into the first cooling pipe 21 and the second cooling pipe 22. This cools the oilfield gas in the third connecting pipe 7 that has been heated, ensuring that the output oilfield gas temperature is not too high and preventing the oilfield gas temperature from affecting subsequent operations.

[0051] When oilfield gas is transported through the third connecting pipe 7, the first motor 102 and the second motor 202 are started, connecting the third connecting pipe 7 to the inlet pipe 3 and the outlet pipe 4. The oilfield gas blows through the orifice plate 27, creating a pressure difference on both sides of the orifice plate 27, thus forming an orifice plate flow meter. The pressure difference can be obtained by comparing the detection results of the third pressure sensor 31 and the first pressure sensor 205, which is then used to calculate the flow rate of the oilfield gas. Furthermore, when the oilfield gas blows through the turbine blades 30, the gas can drive the turbine blades 30 to rotate, thereby driving the rotating pipe 29 to rotate. The rotational speed of the rotating tube 29 is detected by a speed sensor. The flow rate is calculated based on the speed, and the liquid pump 25 is started. The liquid pump 25 then sends the coolant in the coolant tank 24 into the first cooling tube 21 and the second cooling tube 22. This cools the oilfield gas inside the turbine blade 30, the rotating tube 29, and the third connecting pipe 7, preventing the turbine blade 30 and the rotating tube 29 from heating up due to friction with the gas. It also prevents the lubricant around the rotating tube 29 from becoming less effective due to increased temperature, ensuring the rotational performance of the rotating tube 29 and reducing the friction generated by its rotation.

[0052] When the first connecting pipe 5 is transporting oilfield gas, the second connecting pipe 6 and the third connecting pipe 7 are connected to the inlet pipe 3 but not to the outlet pipe 4. Therefore, the gas pressure in the second connecting pipe 6 and the third connecting pipe 7 is the same as that in the inlet pipe 3, and can be used as a reference standard for gas pressure.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An oilfield gas flow measurement device, comprising a first connector and a second connector, characterized in that, A first connecting pipe, a second connecting pipe, and a third connecting pipe are installed between the first connector and the second connector. A first valve core is installed inside the first connector, and a second valve core is installed inside the second connector. The first connecting pipe, the second connecting pipe, and the third connecting pipe correspond to the first valve core and the second valve core. A pressure detection structure is installed on the second valve core. A sampling structure is installed on the first connecting pipe. A thermal flow measurement structure is installed on the second connecting pipe. A turbine flow measurement structure is installed inside the third connecting pipe. A cooling structure is installed on the third connecting pipe. The cooling structure corresponds to the turbine flow measurement structure and the second connecting pipe. An orifice plate is installed on one side of the turbine flow measurement structure. The first connector is rotatably connected to the first valve core. An air inlet pipe and a first motor are fixed on the first connector. The output end of the first motor is fixedly connected to the first valve core. A communication port is opened inside the first valve core. Multiple first connection ports are opened on the periphery of the first valve core. The first connection ports are connected to the communication port. The multiple first connection ports are respectively connected to the air inlet pipe, the first connection pipe, the second connection pipe and the third connection pipe. The second connector is rotatably connected to the second valve core. An air outlet pipe and a second motor are fixed on the second connector. The output end of the second motor is fixedly connected to the second valve core. An L-shaped second connection port is opened inside the second valve core. The second connection port is connected to the air outlet pipe. The second connection port corresponds to the first connection pipe, the second connection pipe and the third connection pipe. The pressure detection structure includes multiple first pressure sensors. Multiple grooves are provided on the periphery of the second valve core. The first pressure sensors are fixed in the grooves. The first pressure sensors correspond to the first connecting pipe, the second connecting pipe and the third connecting pipe. The first connecting pipe, the second connecting pipe and the third connecting pipe are all fixedly connected to the first connector and the second connector. The sampling structure includes a sampling box fixed in the middle of the first connecting pipe, a connecting pipe connected to the first connecting pipe is opened in the sampling box, a sampling port is opened at the bottom of the sampling box, a sampling pipe is slidably fitted in the sampling port, a block is elastically fitted in the sampling port, a sealing plate and a fixing plate are fixed in the sampling port, a spring is fixed between the fixing plate and the block, and a T-shaped connecting rod is fixed between the block and the sampling pipe. The turbine flow measurement structure includes a fixed tube installed inside a third connecting pipe, a rotating tube installed inside the fixed tube, multiple turbine blades fixed inside the rotating tube, the fixed tube being fixedly connected to the third connecting pipe, the rotating tube being rotatably connected to the fixed tube, an orifice plate being fixedly connected to the fixed tube, the orifice plate being located at the end of the fixed tube near the first connector, the orifice plate having air holes, a third air pressure sensor fixed inside the fixed tube located on one side of the orifice plate, and the third air pressure sensor being in contact with the orifice plate, and a cooling structure including a coolant tank fixed on the third connecting pipe, a liquid pump and a cooler fixed inside the coolant tank, the coolant tank containing coolant, a cooling structure installed inside the third connecting pipe, the cooling structure corresponding to the fixed tube and the liquid pump, an S-shaped first cooling tube fixed inside the third connecting pipe, and an S-shaped second cooling tube installed at the end of the second connecting pipe near the second connector.

2. The oilfield gas flow measurement device according to claim 1, characterized in that: The thermal flow measurement structure includes an electric heating tube fixed inside a second connecting pipe. A first temperature sensor and a second temperature sensor are fixed on the second connecting pipe. The first temperature sensor is located inside the second connecting pipe on the side closer to the electric heating tube, and the second temperature sensor is located inside the second connecting pipe on the side farther from the electric heating tube. A second pressure sensor is fixed at the end of the second connecting pipe away from the electric heating tube. A first cooling tube is located around the fixed pipe and is connected to the output end of the liquid pump. A fourth connecting pipe is fixed between the first cooling tube and the second cooling tube. A fifth connecting pipe is installed between the second cooling tube and the coolant tank.

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