Oil field gas flow measuring device

Abstract

The invention provides an oil field gas flow measuring device which comprises a first connector and a second connector, a first connecting pipe, a second connecting pipe and a third connecting pipe are arranged between the first connector and the second connector, a first valve element is arranged in the first connector, a second valve element is arranged in the second connector, and a third valve element is arranged in the third connecting pipe. The first connecting pipe, the second connecting pipe and the third connecting pipe correspond to the first valve element and the second valve element. According to the oil field gas flow measuring device, normal operation of transportation work can be guaranteed, the working efficiency is improved, and when one connecting pipe works, the air pressure in the other two connecting pipes is in a constant state, so that the flow of oil field gas is conveniently measured, and the measuring efficiency is improved; different flow measurement methods can be selected according to requirements to measure the flow of oil field gas, so that the application range of the device is expanded, measurement can be carried out through other structures when the measurement structure in one connecting pipe is damaged, and normal operation of work is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of gas flow measurement, in particular to an oilfield gas flow measurement device. Background Art

[0002] When an oil field is being mined, there will be some gas in the oil field. These gases can be used after being processed. The existing methods for measuring the gas flow in the oil field mostly use turbine flowmeters or thermal flowmeters. For example, the patent with announcement number CN205154138U discloses a device for measuring the gas flow in an oil field gas storage reservoir, including an inner wall of a gas test channel, a heating unit, a temperature sensor array and a shell. The key points of the structure are that the heating unit is arranged on the outer side of the inner wall of the gas test channel, the temperature sensor array is arranged on the outer side of the heating unit, the outer side of the temperature sensor array is the shell, the outer side of the inner wall of the gas test channel is connected to the heating unit, and the outer side of the inner wall of the gas test channel is connected to the heating unit. A first insulating layer is provided between the heating unit, between the outside of the heating unit and the temperature sensor array, and between the temperature sensor array and the outer shell. The device measures the flow of oilfield gas by heating the oilfield gas and monitoring the temperature changes of the oilfield gas at different parts. However, when the oilfield gas is heated, the thermal expansion of the oilfield gas will affect the flow, resulting in a large error in the measurement of the oilfield gas flow. In addition, the component content of the oilfield gas at different locations may be different. When the oilfield gas is heated, for gases with different component contents, errors will be caused in the calculation, affecting the accuracy of the measurement results.

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

[0004] In view of the deficiencies in the prior art, the present invention aims to provide an oilfield gas flow measurement device to solve the problems raised in the above-mentioned background technology. The present invention can ensure the normal progress of transportation work and improve work efficiency. When one of the connecting pipes is working, the air pressure in the other two connecting pipes is in a constant state, thereby facilitating the measurement of the flow of oilfield gas and improving measurement efficiency. Different flow measurement methods can be selected to measure the flow of oilfield gas according to needs, thereby expanding the scope of application of the device. When the measuring structure in one of the connecting pipes is damaged, measurement can be carried out through other structures to ensure normal operation of the work. The air pressure of the intake pipe can be measured, so that the appropriate flow meter can be selected according to the size of the air pressure. flow measurement structure; sampling can be performed through the sampling structure, so that the specific components in the oilfield gas can be detected, so that the heating temperature of the thermal flow measurement structure can be manually controlled according to the detection results, thereby reducing the measurement error of the thermal flow measurement structure, and the flow can be measured by an orifice flowmeter composed of a turbine flow measurement structure and an orifice plate, and multiple measurement results can be compared with each other to ensure the accuracy of the measurement results; the turbine flow measurement structure can be cooled to prevent the turbine flow measurement structure from generating friction with the oilfield gas and causing heat, thereby ensuring the lubrication effect of the turbine flow measurement structure, reducing friction, and preventing the blow-out temperature from being too high, reducing the impact of the increase in oilfield gas temperature on subsequent use.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: an oilfield gas flow measuring device, including a first connecting head and a second connecting head, a first connecting pipe, a second connecting pipe and a third connecting pipe are installed between the first connecting head and the second connecting head, a first valve core is installed in the first connecting head, a second valve core is installed in the second connecting head, 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 in 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 connecting head is rotatably connected to the first valve core, an air intake pipe is fixed on the first connecting head, a first motor is fixed on the first connecting head, an output end of the first motor is fixedly connected to the first valve core, a connecting port is opened in the first valve core, a plurality of first connecting ports are opened on the peripheral side of the first valve core, the first connecting port is connected to the connecting port, and the plurality of first connecting ports are respectively connected to the air intake pipe, the first connecting pipe, the second connecting pipe and the third connecting pipe.

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

[0008] Furthermore, the pressure detection structure includes multiple first air pressure sensors, multiple grooves are opened on the circumferential side of the second valve core, the first air pressure sensors are fixed in the grooves, the first air pressure sensors correspond to the first connecting tube, the second connecting tube and the third connecting tube, and the first connecting tube, the second connecting tube and the third connecting tube are all fixedly connected to the first connecting head and the second connecting head.

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

[0010] Furthermore, the thermal flow measurement structure includes an electric heating tube fixed in a second connecting tube, a first temperature sensor and a second temperature sensor are fixed on the second connecting tube, the first temperature sensor is located on a side of the second connecting tube close to the electric heating tube, the second temperature sensor is located on a side of the second connecting tube away from the electric heating tube, and a second air pressure sensor is fixed at one end of the second connecting tube away from the electric heating tube.

[0011] Furthermore, the turbine flow measurement structure includes a fixed tube installed in the third connecting tube, a rotating tube installed in the fixed tube, a plurality of turbine blades fixed in the rotating tube, the fixed tube is fixedly connected to the third connecting tube, and the rotating tube is rotatably connected to the fixed tube.

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

[0013] Furthermore, the cooling structure includes a coolant tank fixed on the third connecting pipe, a liquid pump is fixed in the coolant tank, coolant is installed in the coolant tank, a refrigerator is fixed in the coolant tank, a cooling structure is installed in the third connecting pipe, and the cooling structure corresponds to the fixed pipe and the liquid pump.

[0014] Furthermore, a first cooling pipe is fixed in the third connecting pipe, the first cooling pipe has an S-shaped structure, the first cooling pipe is located on the peripheral side of the fixed pipe, the first cooling pipe is connected to the output end of the liquid pump, and a second cooling pipe is installed at one end of the second connecting pipe close to 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, and a fifth connecting pipe is installed between the second cooling pipe and the coolant tank.

[0015] Beneficial effects of the present invention:

[0016] 1. A first connecting pipe, a second connecting pipe and a third connecting pipe are installed between the first connecting head and the second connecting head. Oilfield gas can be transported through the first connecting pipe, the second connecting pipe and the third connecting pipe, and the first connecting pipe, the second connecting pipe and the third connecting pipe are convenient to repair. When one of them is repaired, oilfield gas can be transported through the other two, so there is no need to shut down, ensuring the normal progress of transportation work and improving work efficiency. When one of the connecting pipes is working, the air pressure in the other two connecting pipes is in a constant state, which facilitates the measurement of the flow rate of oilfield gas and improves measurement efficiency.

[0017] 2. A first valve core is rotatably installed in the first connecting head, and a second valve core is rotatably installed in the second connecting head. The circulation among the first connecting pipe, the second connecting pipe and the third connecting pipe can be controlled by rotating the first valve core and the second valve core, so that the first connecting pipe, the second connecting pipe or the third connecting pipe can be shut down. Different flow measurement methods can be selected according to needs to measure the flow of oilfield gas, thereby expanding the scope of application of the device. When the measuring structure in one of the connecting pipes is damaged, measurement can be performed through other structures to ensure normal operation.

[0018] 3. A pressure detection structure is installed on the second valve core. The air pressure in the connecting pipe where no gas is flowing can be monitored through the pressure detection structure, so that the air pressure in the air inlet pipe can be measured, and the appropriate flow measurement structure can be selected according to the size of 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, a turbine flow measurement structure is installed in the third connecting pipe, and an orifice plate is installed on one side of the turbine flow measurement structure. Sampling can be performed through the sampling structure, so that the specific components in the oilfield gas can be detected. The heating temperature of the thermal flow measurement structure can be manually controlled according to the detection results, thereby reducing the measurement error of the thermal flow measurement structure, and the flow can be measured by the orifice flowmeter composed of the turbine flow measurement structure and the orifice plate. Multiple measurement results can be compared with each other 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 to prevent the turbine flow measurement structure from generating heat due to friction with the oilfield gas, thereby ensuring the lubrication effect of the turbine flow measurement structure and reducing friction. In addition, the second connecting pipe can be cooled to achieve cooling of the oilfield gas heated by the thermal flow measurement structure, thereby preventing the blow-out temperature from being too high and reducing the impact of the increased oilfield gas temperature on subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 This is a schematic diagram of the assembly cross-sectional structure of a first connector, a second connector, and a 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 of the present invention;

[0024] Figure 4 This is a schematic diagram of the assembly cross-sectional structure of a first connecting pipe, a second connecting pipe, and a 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 of the present invention;

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

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

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

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

[0030] Figure 10 This is a schematic cross-sectional structural diagram of a 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 a second valve core in an oilfield gas flow measurement device of the present invention;

[0032] In the figure: 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 pipe; 12 , sealing plate; 13, blocking block; 14, fixing plate; 15, spring; 16, connecting rod; 17, electric heating tube; 18, first temperature sensor; 19, second temperature sensor; 20, second air pressure sensor; 21, first cooling tube; 22, second cooling tube; 23, fourth connecting tube; 24, coolant tank; 25, liquid pump; 26, refrigerator; 27, orifice plate; 28, fixing tube; 29, rotating tube; 30, turbine blade; 31, third air pressure sensor; 32, fifth connecting tube. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0034] See also Figures 1 to 11 The present invention provides a technical solution: an oilfield gas flow measuring device, comprising a first connecting head 1 and a second connecting head 2, wherein a first connecting pipe 5, a second connecting pipe 6 and a third connecting pipe 7 are installed between the first connecting head 1 and the second connecting head 2, a first valve core 101 is installed in the first connecting head 1, a second valve core 201 is installed in the second connecting head 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 in the third connecting pipe 7, a cooling structure is installed on the third connecting pipe 7, the cooling structure corresponds 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 connecting head 1 is rotatably connected to the first valve core 101, an intake pipe 3 is fixed on the first connecting head 1, a first motor 102 is fixed on the first connecting head 1, an output end of the first motor 102 is fixedly connected to the first valve core 101, a connecting port 103 is opened in the first valve core 101, a plurality of first connecting ports 104 are opened on the peripheral side of the first valve core 101, the first connecting port 104 is connected to the connecting port 103, and the plurality of first connecting ports 104 are respectively connected to the intake 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 can drive the first valve core 101 to rotate, thereby causing the first connecting port 104 to rotate. One of the first connecting ports 104 and the air intake pipe 3 is in a normally open state. Even if the first valve core 101 rotates, the first connecting port 104 always remains connected to the air intake pipe 3, thereby ensuring air intake. The other first connecting ports 104 are respectively connected to the first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7. When the first valve core 101 rotates, there is a first connecting port 104 that is not connected to the outside. For example, starting the first motor 102 drives the first valve core 101 to rotate. At this time, the first connecting port 104 is misaligned with the first connecting pipe 5, so that the gas in the air intake pipe 3 can pass through the first connecting port 104 into the second connecting pipe 6 and the third connecting pipe 7, so that the first connecting pipe 5 no longer takes in air, so that the oil field gas in the first connecting pipe 5 can be discharged, which is convenient for sampling the oil field gas.

[0037] The second connecting head 2 is rotatably connected to the second valve core 201, an air outlet pipe 4 is fixed on the second connecting head 2, a second motor 202 is fixed on the second connecting head 2, the output end of the second motor 202 is fixedly connected to the second valve core 201, a second connecting port 203 is opened in the second valve core 201, the second connecting port 203 is an L-shaped structure, the second connecting port 203 is communicated with the air outlet pipe 4, the second connecting port 203 corresponds to the first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7.

[0038] Specifically, the second connecting port 203 is always in a connected state with the air outlet pipe 4. By starting the second motor 202, the second valve core 201 can be driven to rotate by the second motor 202, thereby driving the second connecting port 203 to be connected with the first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7. When the second connecting port 203 is connected with one of the connecting pipes, the air pressure in the other two connecting pipes is in a constant state and is the same as the air pressure in the air inlet pipe 3, so it is more convenient to test the air pressure. The amount of flow can be simply judged by the size of the air pressure, and the appropriate measurement method can be selected according to the amount of flow.

[0039] The pressure detection structure includes multiple first air pressure sensors 205, and multiple grooves 204 are opened on the circumferential side of the second valve core 201. The first air pressure sensor 205 is fixed in the groove 204. The first air pressure sensor 205 corresponds to the first connecting tube 5, the second connecting tube 6 and the third connecting tube 7. The first connecting tube 5, the second connecting tube 6 and the third connecting tube 7 are all fixedly connected to the first connecting head 1 and the second connecting head 2.

[0040] Specifically, the air pressure inside the non-ventilated first connecting pipe 5, the second connecting pipe 6 or the third connecting pipe 7 can be measured by the first air pressure sensor 205, so that the air pressure of the intake pipe 3 can be measured, and as the second valve core 201 rotates, the first air pressure sensor 205 will also rotate together, so that the measuring connecting pipe can be adjusted more flexibly to ensure the accuracy of the measurement results.

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

[0042] Specifically, when measuring the flow of oilfield gas through the first connecting pipe 5, the gas is completely discharged through the sampling port 10 for sampling, so that workers can detect the composition and content of the oilfield gas, thereby detecting the density of the oilfield gas and ensuring the accuracy of the flow 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 in the first connecting pipe 5 is discharged. At this time, the air pressure in the first connecting pipe 5 is the same as the atmospheric pressure. Then, the first valve core 101 is rotated to allow the oilfield gas to enter the first connecting pipe 5. The first air pressure sensor 205 can be used to judge the air pressure change in the first connecting pipe 5 per unit time, and the flow rate of the oilfield gas can be calculated, thereby realizing the flow measurement of the oilfield gas. The staff can take samples to detect the composition content of the oilfield gas and ensure the accuracy of the measurement results.

[0043] The thermal flow measurement structure includes an electric heating tube 17 fixed in the second connecting tube 6, and 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 on the side of the second connecting tube 6 close to the electric heating tube 17, and the second temperature sensor 19 is located on the side of the second connecting tube 6 away from the electric heating tube 17. A second air 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 air inlet pipe 3 and the air outlet pipe 4, that is, the oilfield gas is transported through the second connecting pipe 6, and can be heated by the electric heating pipe 17. The temperature changes at two different positions are judged by the first temperature sensor 18 and the second temperature sensor 19, so that the flow rate of the oilfield gas is measured by temperature, and the air pressure in the second connecting pipe 6 can be detected by the second air pressure sensor 20 and compared with the air pressure detected by the first air pressure sensor 205, so as to determine whether the heating of the electric heating pipe 17 has a significant impact on the air pressure of the oilfield gas, thereby ensuring the accuracy of the measurement results.

[0045] The turbine flow measurement structure includes a fixed tube 28 installed in the third connecting tube 7, a rotating tube 29 is installed in the fixed tube 28, a plurality of turbine blades 30 are fixed in the rotating tube 29, the fixed tube 28 is fixedly connected to the third connecting tube 7, the rotating tube 29 is rotatably connected to the fixed tube 28, the orifice plate 27 is fixedly connected to the fixed tube 28, the orifice plate 27 is located at one end of the fixed tube 28 close to the first connector 1, an air hole is opened in the orifice plate 27, a third air pressure sensor 31 is fixed in the fixed tube 28, the third air pressure sensor 31 is located on one side of the orifice plate 27, and the third air pressure sensor 31 is in contact with the orifice plate 27, a speed sensor is installed in the fixed tube 28, and the speed sensor is used to monitor the speed of the rotating tube 29.

[0046] Specifically, the oilfield gas is transported through the third connecting pipe 7, that is, the third connecting pipe 7 is connected to the air inlet pipe 3 and the air 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, so that the orifice plate 27 forms an orifice flowmeter. The pressure difference can be obtained by comparing the detection results of the third air pressure sensor 31 and the first air pressure sensor 205, so as to calculate the flow rate of the oilfield gas. When the oilfield gas blows through the turbine blades 30, the turbine blades 30 can be driven to rotate by the gas, thereby driving the rotating tube 29 to rotate. The rotation speed of the rotating tube 29 is detected by the speed sensor, and the flow rate is calculated according to the speed, which is compared with the flow rate obtained by the orifice flowmeter to prevent large errors.

[0047] The cooling structure includes a coolant tank 24 fixed on the third connecting pipe 7, a liquid pump 25 is fixed in the coolant tank 24, coolant is installed in the coolant tank 24, a refrigerator 26 is fixed in the coolant tank 24, a cooling structure is installed in the third connecting pipe 7, the cooling structure corresponds to the fixed pipe 28 and the liquid pump 25, a first cooling pipe 21 is fixed in the third connecting pipe 7, the first cooling pipe 21 is an S-shaped structure, the first cooling pipe 21 is located on the peripheral side of the fixed pipe 28, the first cooling pipe 21 is connected to the output end of the liquid pump 25, the second connecting pipe 6 is provided with a second cooling pipe 22 at one end close to the second connector 2, the second cooling pipe 22 is an S-shaped structure, a fourth connecting pipe 23 is fixed between the first cooling pipe 21 and the second cooling pipe 22, and a fifth connecting pipe 32 is installed between the second cooling pipe 22 and the coolant tank 24.

[0048] Specifically, by starting the liquid pump 25, the coolant in the coolant tank 24 can be sent into the first cooling pipe 21 and the second cooling pipe 22 through the liquid pump 25, thereby cooling the turbine blades 30, the rotating pipe 29 and the oilfield gas inside the third connecting pipe 7, thereby preventing the turbine blades 30 and the rotating pipe 29 from heating up due to friction with the gas, preventing the lubricating liquid on the side of the rotating pipe 29 from losing its lubrication effect due to heating, ensuring the rotation effect of the rotating pipe 29, reducing the 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, thereby ensuring that the temperature of the output oilfield gas is not too high, and preventing the excessively high temperature of the oilfield gas from affecting subsequent work.

[0049] Working process: When the sampling box 8 is used to sample and measure the flow rate of oilfield gas, the first motor 102 is started, and the first motor 102 drives the first valve core 101 to rotate. At this time, the first connecting port 104 is misaligned with the first connecting pipe 5, so that the gas in the intake pipe 3 can pass through the first connecting port 104 into the second connecting pipe 6 and the third connecting pipe 7, so that no more air is taken into the first connecting pipe 5. Then the second motor 202 is started, and the second valve core 201 can be driven to rotate by the second motor 202, thereby driving the second connecting port 203 to be connected with the second connecting pipe 6 or the third connecting pipe 7. At this time, the first connecting pipe 5 is in a state of neither taking in nor out of air. The staff can manually push the sampling tube 11 upwards, so that the sampling tube 11 pushes the blocking block 13 upwards through the connecting rod 16, and the spring 15 When stretched, the blocking block 13 is not 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. When the sampling is completed, the air pressure in the first connecting pipe 5 drops, and the air pressure is monitored by the first air pressure sensor 205. Then the sampling pipe 11 is released, and the spring 15 rebounds to drive the sampling pipe 11 to reset. The blocking block 13 is in contact with the sealing plate 12, thereby ensuring the 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 connecting 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 air pressure sensor 205 changes, so that the flow rate of the oilfield gas can be obtained according to the pressure change per unit time.

[0050] When the flow of oilfield gas is transported through the second connecting pipe 6, the first motor 102 and the second motor 202 are started, so that the second connecting pipe 6 is connected to the air inlet pipe 3 and the air outlet pipe 4, and then heated by the electric heating pipe 17. The temperature changes at two different positions are judged by the first temperature sensor 18 and the second temperature sensor 19, so that the flow of oilfield gas is measured by temperature, and the air pressure in the second connecting pipe 6 can be detected by the second air pressure sensor 20 and compared with the air pressure detected by the first air pressure sensor 205, so as to determine whether the heating of the electric heating pipe 17 has a greater impact on the air pressure of the oilfield gas. The liquid pump 25 is started, and the coolant in the coolant tank 24 can be sent into the first cooling pipe 21 and the second cooling pipe 22 through the liquid pump 25, so that the oilfield gas in the third connecting pipe 7 that has risen in temperature due to heating can be cooled, thereby ensuring that the output oilfield gas temperature is not too high, and preventing the impact of excessive oilfield gas temperature on subsequent work.

[0051] When oilfield gas is transported through the third connecting pipe 7, the first motor 102 and the second motor 202 are started, so that the third connecting pipe 7 is connected to the air inlet pipe 3 and the air outlet pipe 4. The oilfield gas blows through the orifice plate 27, thereby generating a pressure difference on both sides of the orifice plate 27, so that the orifice plate 27 forms an orifice plate flowmeter. The pressure difference can be obtained by comparing the detection results of the third air pressure sensor 31 and the first air pressure sensor 205, thereby calculating the flow rate of the oilfield gas. When the oilfield gas blows through the turbine blades 30, the turbine blades 30 can be driven by the gas to rotate, thereby driving the rotating pipe 29 to rotate. The rotation speed of the rotating tube 29 is detected by a speed sensor, the flow rate is calculated according to the rotation speed, and the liquid pump 25 is started. The coolant in the coolant tank 24 can be sent to the first cooling tube 21 and the second cooling tube 22 through the liquid pump 25, thereby cooling the oil field gas inside the turbine blades 30, the rotating tube 29 and the third connecting tube 7, thereby preventing the turbine blades 30 and the rotating tube 29 from heating up due to friction with the gas, and preventing the lubricating liquid on the side of the rotating tube 29 from losing its lubrication effect due to heating, thereby ensuring the rotation effect of the rotating tube 29 and reducing the friction generated by the rotation of the rotating tube 29.

[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 air inlet pipe 3 but not to the air outlet pipe 4. Therefore, the air pressure in the second connecting pipe 6 and the third connecting pipe 7 is the same as that in the air inlet pipe 3, which can be used as a reference standard for air pressure.

[0053] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An oilfield gas flow measurement device, comprising a first connector (1) and a second connector (2), characterized in that: A first connecting pipe (5), a second connecting pipe (6) and a third connecting pipe (7) are installed between the first connecting head (1) and the second connecting head (2); a first valve core (101) is installed in the first connecting head (1); a second valve core (201) is installed in the second connecting head (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 in the third connecting pipe (7); a cooling structure is installed on the third connecting pipe (7); the cooling structure corresponds 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.

2. The oilfield gas flow measurement device according to claim 1, characterized in that: The first connector (1) is rotatably connected to the first valve core (101); an air intake pipe (3) is fixed to the first connector (1); a first motor (102) is fixed to the first connector (1); an output end of the first motor (102) is fixedly connected to the first valve core (101); a connecting port (103) is provided in the first valve core (101); a plurality of first connecting ports (104) are provided on the circumference of the first valve core (101); the first connecting port (104) is connected to the connecting port (103); and the plurality of first connecting ports (104) are respectively connected to the air intake pipe (3), the first connecting pipe (5), the second connecting pipe (6) and the third connecting pipe (7).

3. The oilfield gas flow measurement device according to claim 1, characterized in that: The second connector (2) is rotatably connected to the second valve core (201); an air outlet pipe (4) is fixed to the second connector (2); a second motor (202) is fixed to the second connector (2); an output end of the second motor (202) is fixedly connected to the second valve core (201); a second connecting port (203) is provided in the second valve core (201); the second connecting port (203) is an L-shaped structure; the second connecting port (203) is connected to the air outlet pipe (4); and the second connecting port (203) corresponds to the first connecting pipe (5), the second connecting pipe (6) and the third connecting pipe (7).

4. The oilfield gas flow measurement device according to claim 1, characterized in that: The pressure detection structure comprises a plurality of first air pressure sensors (205); a plurality of grooves (204) are provided on the circumference of the second valve core (201); the first air pressure sensors (205) are fixed in the grooves (204); the first air pressure sensors (205) correspond to the first connecting tube (5), the second connecting tube (6) and the third connecting tube (7); the first connecting tube (5), the second connecting tube (6) and the third connecting tube (7) are all fixedly connected to the first connecting head (1) and the second connecting head (2).

5. The oilfield gas flow measurement device according to claim 1, characterized in that: The sampling structure comprises a sampling box (8) fixed on a first connecting tube (5), the sampling box (8) being located in the middle of the first connecting tube (5), a connecting tube (9) being provided in the sampling box (8), the connecting tube (9) being connected to the first connecting tube (5), a sampling port (10) being provided at the bottom of the sampling box (8), a sampling tube (11) being slidably fitted in the sampling port (10), a blocking block (13) being elastically fitted in the sampling port (10), a sealing plate (12) and a fixing plate (14) being fixed in the sampling port (10), a spring (15) being fixed between the fixing plate (14) and the blocking block (13), a connecting rod (16) being fixed between the blocking block (13) and the sampling tube (11), and the connecting rod (16) being a T-shaped structure.

6. The oilfield gas flow measurement device according to claim 1, characterized in that: The thermal flow measurement structure comprises an electric heating tube (17) fixed in 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 on a side of the second connecting tube (6) close to the electric heating tube (17); the second temperature sensor (19) is located on a side of the second connecting tube (6) away from the electric heating tube (17); and a second air pressure sensor (20) is fixed at one end of the second connecting tube (6) away from the electric heating tube (17).

7. The oilfield gas flow measurement device according to claim 1, characterized in that: The turbine flow measurement structure comprises a fixed tube (28) installed in a third connecting tube (7), a rotating tube (29) installed in the fixed tube (28), a plurality of turbine blades (30) fixed in the rotating tube (29), the fixed tube (28) being fixedly connected to the third connecting tube (7), and the rotating tube (29) being rotatably connected to the fixed tube (28).

8. The oilfield gas flow measurement device according to claim 7, characterized in that: The orifice plate (27) is fixedly connected to the fixed tube (28). The orifice plate (27) is located at one end of the fixed tube (28) close to the first connector (1). An air hole is provided in the orifice plate (27). A third air pressure sensor (31) is fixed in the fixed tube (28). The third air pressure sensor (31) is located on one side of the orifice plate (27), and the third air pressure sensor (31) is in contact with the orifice plate (27).

9. The oilfield gas flow measurement device according to claim 7, characterized in that: The cooling structure comprises a cooling liquid tank (24) fixed on the third connecting pipe (7), a liquid pump (25) fixed in the cooling liquid tank (24), cooling liquid installed in the cooling liquid tank (24), a refrigerator (26) fixed in the cooling liquid tank (24), a cooling structure installed in the third connecting pipe (7), and the cooling structure corresponding to the fixed pipe (28) and the liquid pump (25).

10. The oilfield gas flow measurement device according to claim 9, characterized in that: A first cooling pipe (21) is fixed in the third connecting pipe (7), the first cooling pipe (21) is an S-shaped structure, the first cooling pipe (21) is located on the peripheral side of the fixed pipe (28), the first cooling pipe (21) is connected to the output end of the liquid pump (25), a second cooling pipe (22) is installed at one end of the second connecting pipe (6) close to the second connector (2), the second cooling pipe (22) is an S-shaped structure, a fourth connecting pipe (23) is fixed between the first cooling pipe (21) and the second cooling pipe (22), and a fifth connecting pipe (32) is installed between the second cooling pipe (22) and the coolant tank (24).

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