Single-well multiphase metering device

Abstract

The invention belongs to the technical field of single-well multiphase metering, and particularly relates to a single-well multiphase metering device which comprises a centrifugal box, a gas-liquid separation box is connected to the upper end of the centrifugal box, a feeding pipe is arranged on one side of the upper end of the gas-liquid separation box, a gas outlet nozzle is arranged on the other side of the upper end of the gas-liquid separation box, and a fixing column is fixedly installed in the gas-liquid separation box. A spiral plate fixedly sleeves the fixed column, one end of the gas-liquid separation box is connected with an oil-liquid separation box, a second partition plate and a third partition plate are fixedly mounted in the oil-liquid separation box, and after petroleum sequentially passes through the gas-liquid separation box, the centrifugal box and the oil-liquid separation box, the petroleum is separated into gas, oil and water; the gas flow meter and the liquid flow meter are used for measuring gas, oil and water generated by separation in a plurality of time periods, so that a plurality of petroleum phase fractions can be conveniently obtained, the petroleum metering efficiency is improved, the separated gas and oil can be directly subjected to the next procedure, and the subsequent treatment efficiency of a petroleum sample is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of single-well multiphase metering, in particular to a single-well multiphase metering device. Background Art

[0002] During oilfield development and production, it is necessary to measure the oil, gas and water in the produced fluid of the oil well. Accurately measuring the ratio of crude oil, natural gas and water produced by the oil well will help oil companies adjust their mining strategies in real time, optimize the oil-water ratio and improve recovery efficiency.

[0003] The patent with publication number CN218211459U discloses a multiphase flow metering device, including a shell, a piston plate is arranged inside the shell, a hydraulic cylinder is arranged on the upper side of the shell, the lower end of the hydraulic cylinder is connected to a telescopic rod, the piston plate is fixedly connected to the lower end of the telescopic rod, a measuring block is embedded and installed on the outer wall of the shell, a base is provided on the lower side of the shell, a motor is provided in the base, and an eccentric wheel is provided on the left side of the motor. The air pressure sensor of this scheme can detect the air pressure change in the detection chamber, and the gas content in the oil sample can be calculated by the difference in the air pressure change; at the same time, due to the different densities of oil and water, the oil and water will be stratified in the measuring chamber, and the stratified oil and water are measured by the measuring block to obtain the volume of water and oil, thereby measuring the respective proportions of water and oil.

[0004] In order to ensure the accuracy of the measurement of the produced oil, multiple samples are often extracted from the oil well, and the multiple samples are measured separately. The measured data are compared to obtain accurate data. However, the above scheme can only measure one group of samples at a time, and the measurement efficiency is slow. Secondly, after the sample is measured, the oil is released from the detection chamber, and the crude oil, natural gas and water in the oil are still mixed together. The sample needs to be post-processed before it can be used, which reduces the subsequent processing efficiency of the oil sample. To this end, the present invention provides a single-well multi-phase metering device. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a single-well multiphase metering device described in the present invention includes a centrifugal box, the upper end of the centrifugal box is connected to a gas-liquid separation box, one side of the upper end of the gas-liquid separation box is provided with a feed pipe, the other side of the upper end of the gas-liquid separation box is provided with an air outlet nozzle, a fixed column is fixedly installed in the gas-liquid separation box, a spiral plate is fixedly sleeved on the fixed column, one end of the gas-liquid separation box is connected to an oil-liquid separation box, a second partition and a third partition are fixedly installed in the oil-liquid separation box, an oil outlet pipe is opened at one end of the oil-liquid separation box, and two sets of perforated plates are fixedly installed on one side of the oil-liquid separation box. A light transmittance sensor probe is provided in the centrifugal box. The main partition is provided in the centrifugal box, which divides the interior of the centrifugal box into a buffer chamber and a centrifugal chamber. A centrifugal disk is rotatably installed in the centrifugal chamber. An outlet is opened at one end of the centrifugal box. The second partition and the third partition divide the interior of the oil-liquid separation box into a first separation chamber, a second separation chamber, and an oil storage chamber. Two groups of light transmittance sensor probes are respectively facing the first separation chamber and the second separation chamber. Electric valves are provided at the bottom of the first separation chamber and the second separation chamber. Both groups of electric valves are connected to the liquid outlet pipe, the oil outlet pipe is connected to the oil storage chamber, and the outlet is used to connect the first separation chamber and the centrifugal chamber. After passing through the gas-liquid separation box, centrifugal box, and oil-liquid separation box in sequence, the oil will be separated into gas, oil, and water. The gas, oil, and water produced by the separation are measured by gas flow meters and liquid flow meters in multiple time periods, so that multiple oil phase fractions can be easily obtained, which improves the measurement efficiency of the oil. Secondly, the separated gas and oil can be directly used for the next step, which improves the efficiency of subsequent processing of the oil sample.

[0007] Preferably, the second partition includes a first partition shell, the first partition shell is fixedly installed in the oil-liquid separation box, a first inner plate slidably connected to the inner cavity of the first partition shell, the end of the electric push rod passes through the first partition shell and the outer ring of the oil-liquid separation box and is fixedly connected to one end of the first inner plate, the electric push rod is fixedly installed on the support seat, and the support seat is fixedly connected to the outside of the oil-liquid separation box, two groups of rectangular grooves are evenly spaced on both sides of the first partition shell, and a liquid-through groove is opened on the first inner plate, and the liquid-through groove is used to connect the rectangular grooves on both sides of the first partition shell; The oil in the first separation chamber and the second separation chamber will flow directly into the oil storage chamber and be discharged through the oil outlet pipe. Since the intersection of water and oil coincides with the bottom surface of the inner bottom of the rectangular groove at this time, the oil layer above the water can pass through the third partition plate, avoiding the large-scale mixing and discharge of water and oil, thereby improving the quality of the discharged oil.

[0008] Preferably, the third partition includes a second partition housing, the second partition housing is fixedly installed in the oil separation box, and is slidably connected to a second inner plate of the inner cavity of the second partition housing. A plurality of groups of segmented grooves are equidistantly provided on the second inner plate, and the volumes of the plurality of groups of segmented grooves decrease sequentially from top to bottom. The oil is discharged in sections through several groups of segmented grooves, and the diameter of the segmented grooves becomes smaller as it goes down, so that the flow rate and flow rate of oil discharge are continuously reduced, thereby greatly reducing the water in the lower layer from being discharged with the oil, and further improving the quality of the oil.

[0009] Preferably, the third partition further includes a plurality of groups of movable plates, which are slidably connected to the plurality of group of segmented grooves, one end of the plurality of groups of movable plates is respectively connected to a plurality of groups of movable rods, which are fixedly connected to the active rod on the lower side of one end of the second inner plate, the lower end of the rocker arm is hinged to the active rod, the lower end of the hydraulic cylinder is hinged to the active rod, and the upper end of the hydraulic cylinder is hinged to the rocker arm, one end of the plurality of group of segmented grooves is provided with a first through hole, one end of the movable rod passes through the first through hole and is connected to the movable plate, a plurality of groups of second through holes are evenly spaced apart on one side of the oil separation box and the second partition shell, the other end of the movable rod passes through the second through hole, a guide hole is further provided on one side of the oil separation box and the second partition shell, the active rod passes through the guide hole, the plurality of groups of active rods are shortened in sequence from top to bottom, a pin is provided at one end of the active rod, a receiving groove is provided on the rocker arm, and the pin is located in the receiving groove; The pin shaft, together with the movable rod and the movable plate, moves toward the direction of another set of electric push rods, and the moving movable plate pushes off the oil on the inner wall of the segmented groove. The pushed-off oil is discharged through the rectangular groove until the movable plate is tightly attached to the other end of the segmented groove, thereby realizing the cleaning of the oil on the inner wall of the segmented groove. The operation is simple and convenient, which makes it easy for the staff to clean the oil on the inner wall of the segmented groove.

[0010] The beneficial effects of the present invention are as follows: 1. After passing through the gas-liquid separation box, centrifugal box, and oil-liquid separation box in sequence, the oil will be separated into gas, oil, and water. The gas, oil, and water produced by the separation are measured by gas flow meters and liquid flow meters in multiple time periods, so that multiple oil phase fractions can be obtained conveniently, which improves the measurement efficiency of the oil. Secondly, the separated gas and oil can be directly used for the next process, which improves the efficiency of subsequent processing of the oil sample.

[0011] 2. Start the electric push rod on the second partition, which pushes the first inner plate to slide along the inner cavity of the first partition shell, so that the liquid groove on the first inner plate is aligned with the rectangular grooves on both sides of the first partition shell. At this time, the first separation chamber and the second separation chamber will be connected, and the liquids in the first separation chamber and the second separation chamber will be mixed together. After the liquids in the first separation chamber and the second separation chamber are separated again, start the transmittance sensor probe to drain the water in the first separation chamber and the second separation chamber until the transmittance sensor probe detects the intersection of water and oil. Another set of electric push rods pushes the second inner plate, which will slide along the inner cavity of the second partition shell. Among the several groups of segmented grooves distributed on the second inner plate, the segmented groove at the top will first face the corresponding rectangular groove, and pause the push of another set of electric push rods to allow the oil to be discharged through the uppermost segmented groove. Then, the electric push rods will continue to be started to allow the oil to be discharged in sections through several groups of segmented grooves. The further down, the smaller the diameter of the segmented groove, so that the flow rate and flow rate of oil discharge continue to decrease, thereby greatly reducing the discharge of water in the lower layer along with the oil, further improving the quality of the oil.

[0012] 3. After several groups of segmented grooves are facing several groups of rectangular grooves, the oil in the first separation chamber and the second separation chamber will be drained. At this time, the remaining water in the first separation chamber and the second separation chamber will be drained. In the initial state, the movable plate is close to one end of the segmented groove, and then the hydraulic cylinder is started. The hydraulic cylinder pushes the rocker arm to rotate toward the second partition shell. At the same time, the rocker arm drives the inner wall of the receiving groove to squeeze the pin shaft at one end of several groups of active rods, so that the pin shaft slides along the receiving groove. At the same time, the pin shaft together with the movable rod and the movable plate moves toward the direction of another group of electric push rods, and the moving movable plate pushes off the oil on the inner wall of the segmented groove. The pushed oil is discharged through the rectangular groove until the movable plate is close to the other end of the segmented groove, thereby realizing the cleaning of the oil on the inner wall of the segmented groove. The operation is simple and convenient, which is convenient for the staff to clean the oil on the inner wall of the segmented groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the oil-liquid separation box, the second partition plate, and the third partition plate assembly in cross-section.

[0017] Figure 4 This is a schematic cross-sectional view of the third partition of the present invention.

[0018] Figure 5 It is a cross-sectional schematic diagram of the oil separation box and the third partition plate combination of the present invention.

[0019] Figure 6 It is a cross-sectional schematic diagram of the oil-liquid separation box, the second partition body, the second inner portion, the segmented groove, the movable rod, and the active rod assembly of the present invention.

[0020] Figure 7 It is a schematic diagram of the combination of the movable rod, active rod, rocker arm and hydraulic cylinder of the present invention.

[0021] In the figure: 1, centrifugal box; 21, buffer chamber; 22, centrifugal chamber; 23, outlet; 2, gas-liquid separation box; 3, feed pipe; 4, air outlet nozzle; 5, fixed column; 6, spiral plate; 7, main partition; 8, centrifugal disc; 9, oil-liquid separation box; 901, first separation chamber; 902, second separation chamber; 903, oil storage chamber; 91, second through hole; 92, guide hole; 10, second partition; 11, third partition; 12, oil outlet pipe; 13, electric valve; 14, outlet Liquid pipe; 15, transmittance sensor probe; 101, first partition shell; 1011, rectangular groove; 102, first inner plate; 1021, liquid channel; 103, electric push rod; 104, support seat; 111, second partition shell; 112, second inner plate; 113, segmented groove; 31, first through hole; 114, movable plate; 115, movable rod; 51, pin shaft; 116, active rod; 117, rocker arm; 71, receiving groove; 118, hydraulic cylinder. DETAILED DESCRIPTION

[0022] 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.

[0023] Example 1: Figure 1 and Figure 2As shown, a single-well multiphase metering device according to an embodiment of the present invention includes a centrifugal box 1, the upper end of the centrifugal box 1 is connected to a gas-liquid separation box 2, a feed pipe 3 is provided on one side of the upper end of the gas-liquid separation box 2, and an air outlet nozzle 4 is provided on the other side of the upper end of the gas-liquid separation box 2. A fixed column 5 is fixedly installed in the gas-liquid separation box 2, and a spiral plate 6 is fixedly sleeved on the fixed column 5. One end of the gas-liquid separation box 2 is connected to an oil-liquid separation box 9, a second partition 10 and a third partition 11 are fixedly installed in the oil-liquid separation box 9, an oil outlet pipe 12 is opened at one end of the oil-liquid separation box 9, two groups of transmittance sensor probes 15 are fixedly installed on one side of the oil-liquid separation box 9, a main partition 7 is provided in the centrifugal box 1, and the main partition 7 The interior of the centrifugal box 1 is divided into a buffer chamber 21 and a centrifugal chamber 22. A centrifugal disk 8 is rotatably installed in the centrifugal chamber 22. An outlet 23 is opened at one end of the centrifugal box 1. The second partition 10 and the third partition 11 divide the interior of the oil-liquid separation box 9 into a first separation chamber 901, a second separation chamber 902, and an oil storage chamber 903. Two groups of transmittance sensor probes 15 are respectively facing the first separation chamber 901 and the second separation chamber 902. Electric valves 13 are provided at the bottom of the first separation chamber 901 and the second separation chamber 902. The two groups of electric valves 13 are both connected to the liquid outlet pipe 14. The oil outlet pipe 12 is connected to the oil storage chamber 903. The outlet 23 is used to connect the first separation chamber 901 and the centrifugal chamber 22.

[0024] Specifically, a manual valve is provided on the feed pipe 3, a gas flow meter is connected to the end of the air outlet nozzle 4, and a liquid flow meter is connected to the ends of the oil outlet pipe 12 and the liquid outlet pipe 14. When it is necessary to perform multi-phase metering of the oil in the oil well, the manual valve on the feed pipe 3 is opened, and the oil extracted from the oil well flows into the gas-liquid separation box 2 through the feed pipe 3. In the process of the oil falling on the spiral plate 6, the difference in gas and liquid density is utilized to cause the gas to rise, thereby achieving preliminary separation of gas and liquid. Secondly, the oil will flow downward along the spiral plate 6 in the gas-liquid separation box 2, and the centrifugal force generated by the rotation will quickly separate the gas and liquid in the oil. The separated gas flows upward and is discharged through the air outlet nozzle 4, while the separated liquid falls into the centrifugal box 1, and then the liquid flows from the buffer chamber 21 into the centrifugal chamber 22. At this time, the centrifugal disc 8 is driven by the motor to rotate rapidly. The rotating centrifugal disc 8 causes the liquid in the centrifugal chamber 22 to rotate. The centrifugal force generated by the rotation separates the oil and the water with high density from each other until the liquid in the centrifugal chamber 22 overflows the outlet 23, and the liquid falls into the first separation chamber 901 in the oil-liquid separation box 9 through the outlet 23. During the accumulation of the liquid in the first separation chamber 901, the oil in the first separation chamber 901 begins to be stratified, with the upper layer being oil and the lower layer being water, until the upper layer of oil overflows the second partition plate 10, causing the oil to flow into the second separation chamber 902, and the oil is separated from the water again in the second separation chamber 902 until the oil in the first separation chamber 901 is separated from the water again. The oil in the upper layer of the second separation chamber 902 overflows the third partition plate 11, causing the oil to flow into the oil storage chamber 903, and then the oil in the oil storage chamber 903 is discharged through the oil outlet pipe 12. As the water in the first separation chamber 901 and the second separation chamber 902 continues to accumulate, the oil-water boundary line between the first separation chamber 901 and the second separation chamber 902 will submerge the transmittance sensor probe 15. Since the oil transmittance is lower than the water transmittance, when the transmittance sensor probe 15 is facing the water, it is detected that the liquid transmittance will become smaller. At this time, the transmittance sensor probe 15 controls the electric valve 13 at the bottom of the first separation chamber 901 and the second separation chamber 902 to open through the rear-end control module, and the water in the first separation chamber 901 and the second separation chamber 902 is discharged through the liquid outlet pipe 12. The oil is discharged from the pipe 14. Within a certain time period, the discharged gas is measured by the gas flowmeter at the end of the gas outlet nozzle 4, and the oil and water are measured respectively by the liquid flowmeter connected to the oil outlet pipe 12 and the liquid outlet pipe 14. The phase fraction of the oil is obtained by the measured data. Compared with the existing technology, the oil will be separated into gas, oil and water after passing through the gas-liquid separation box 2, the centrifugal box 1 and the oil-liquid separation box 9 in sequence. The gas, oil and water produced by the separation are measured by the gas flowmeter and the liquid flowmeter in multiple time periods, so that multiple oil phase fractions can be obtained conveniently, which improves the metering efficiency of the oil. Secondly, the separated gas and oil can be directly used for the next step, which improves the efficiency of subsequent processing of the oil sample.

[0025] like Figure 3As shown, the second partition 10 includes a first partition shell 101, the first partition shell 101 is fixedly installed in the oil-liquid separation box 9, and a first inner plate 102 is slidably connected to the inner cavity of the first partition shell 101. The end of the electric push rod 103 passes through the first partition shell 101 and the outer ring of the oil-liquid separation box 9 and is fixedly connected to one end of the first inner plate 102. The electric push rod 103 is fixedly installed on the support seat 104, and the support seat 104 is fixedly connected to the outside of the oil-liquid separation box 9. Two groups of rectangular grooves 1011 are evenly spaced on both sides of the first partition shell 101, and a liquid groove 1021 is opened on the first inner plate 102. The liquid groove 1021 is used to connect the rectangular grooves 1011 on both sides of the first partition shell 101.

[0026] Specifically, the second partition 10 and the third partition 11 have the same structure and size. After the oil is measured, the water and oil in the first separation chamber 901 and the second separation chamber 902 need to be cleaned out. When cleaning the oil, the transmittance sensor probe 15 needs to be closed, and then the electric valve 13 is opened. First, the lower layer of water in the first separation chamber 901 and the second separation chamber 902 is drained out, and then the electric valve 13 is closed, and the liquid outlet pipe 14 is connected to the oil tank, and then the electric valve 13 is opened to drain the oil in the first separation chamber 901 and the second separation chamber 902 into the oil tank. In this process, during the drainage process, it is necessary to work The operator judges whether the water in the first separation chamber 901 and the second separation chamber 902 is completely drained by observation. This may easily lead to the water not being completely drained, resulting in the discharged oil being mixed with water. Secondly, when the liquid outlet pipe 14 is draining the oil, water remains on the inner wall of the liquid outlet pipe 14. The residual water will mix with the oil, reducing the quality of the oil. In the initial state, the liquid groove 1021 is staggered with the plurality of groups of rectangular grooves 1011. Among the plurality of groups of rectangular grooves 1011, the inner bottom surface of the rectangular groove 1011 located at the bottom coincides with the detection surface of the transmittance sensor probe 15. Therefore, when the water and oil in the first separation chamber 901 and the second separation chamber 902 are separated, the liquid outlet pipe 14 may be used as the drain. When cleaning, first start the electric push rod 103 on the second partition 10, and the electric push rod 103 pushes the first inner plate 102 to slide along the inner cavity of the first partition shell 101, so that the liquid groove 1021 on the first inner plate 102 is aligned with the rectangular grooves 1011 on both sides of the first partition shell 101. At this time, the first separation chamber 901 and the second separation chamber 902 will be connected, and the liquids in the first separation chamber 901 and the second separation chamber 902 will be mixed together. After the liquids in the first separation chamber 901 and the second separation chamber 902 are separated again, start the transmittance sensor probe 15 so that the first separation chamber 90 1 and the water in the second separation chamber 902 are discharged until the transmittance sensor probe 15 detects the intersection of water and oil. At this time, the third partition plate 11 is opened according to the same operation method as above, so that the second separation chamber 902 is connected to the oil storage chamber 903. The oil in the first separation chamber 901 and the second separation chamber 902 will flow directly into the oil storage chamber 903 and be discharged through the oil outlet pipe 12. Since the intersection of water and oil coincides with the bottom surface of the lowermost rectangular groove 1011 at this time, the oil layer above the water can pass through the third partition plate 11, avoiding the large-scale mixing of water and oil during discharge, thereby improving the quality of the discharged oil.

[0027] Example 2: Figure 4 As shown, compared with Example 1, another embodiment of the present invention is: the third partition 11 includes a second partition shell 111, the second partition shell 111 is fixedly installed in the oil-liquid separation box 9, and a second inner plate 112 is slidably connected to the inner cavity of the second partition shell 111, and several groups of segmented grooves 113 are equidistantly arranged on the second inner plate 112, and the volumes of the several groups of segmented grooves 113 decrease successively from top to bottom.

[0028] Specifically, the above-mentioned direct liquid-passing groove 1021 and rectangular groove 1011 are opposite to each other, which will cause the oil to flow into the oil storage chamber 903 with a large and fast flow rate. The flowing oil can easily drive the water in the lower layer to overflow the lowest rectangular groove 1011, so that a small amount of water is mixed with the oil and discharged. Therefore, when discharging the oil, the second inner plate 112 is pushed by another set of electric push rods 103, and the second inner plate 112 will slide along the inner cavity of the second partition shell 111. Among the several groups of segmented grooves 113 distributed on the second inner plate 112, the segmented groove 113 located at the top will first face the corresponding rectangular groove 1011, and the push of the other set of electric push rods 103 will be paused to allow the oil to be discharged through the uppermost segmented groove 113. Then the electric push rods 103 will be started again to allow the oil to be discharged in sections through several groups of segmented grooves 113. The lower it goes, the smaller the diameter of the segmented groove 113 is, so that the flow rate and flow rate of the oil discharge are continuously reduced, thereby greatly reducing the discharge of water in the lower layer along with the oil, and further improving the quality of the oil.

[0029] like Figures 5 to 7 As shown, the third partition 11 also includes a plurality of groups of movable plates 114, which are respectively slidably connected to the plurality of group segmented grooves 113, and one end of the plurality of groups of movable plates 114 is respectively connected to the plurality of groups of movable rods 115, which are fixedly connected to the active rod 116 on the lower side of one end of the second inner plate 112, the lower end of the swing rod 117 is hinged to the active rod 116, the lower end of the hydraulic cylinder 118 is hinged to the active rod 116, the upper end of the hydraulic cylinder 118 is hinged to the swing rod 117, and one end of the plurality of group segmented grooves 113 is provided with a first through hole 31, and the movable rod 115 is fixedly connected to the active rod 116 on the lower side of one end of the second inner plate 112. The end passes through the first through hole 31 and is connected to the movable plate 114. Several groups of second through holes 91 are opened at equal distances on one side of the oil separation box 9 and the second partition shell 111. The other end of the movable rod 115 passes through the second through hole 91. A guide hole 92 is also opened on one side of the oil separation box 9 and the second partition shell 111. The active rod 116 passes through the guide hole 92. Several groups of active rods 116 are shortened from top to bottom. A pin shaft 51 is provided at one end of the active rod 116. A receiving groove 71 is opened on the rocker arm 117, and the pin shaft 51 is located in the receiving groove 71.

[0030] Specifically, the movable plate 114 is coated with a rubber layer. When the oil passes through the segmented groove 113, the oil will adhere to the inner wall of the segmented groove 113. Since the second inner plate 112 is located in the second partition plate shell 111, it is more troublesome to clean the oil adhered to the inner wall of the segmented groove 113. Therefore, in the above, after several groups of segmented grooves 113 are directly opposite to several groups of rectangular grooves 1011, the oil in the first separation chamber 901 and the second separation chamber 902 will be drained. At this time, the remaining water in the first separation chamber 901 and the second separation chamber 902 will be drained. In the initial state, the movable plate 114 is close to one end of the segmented groove 113, and then the hydraulic cylinder 118 is started, and the hydraulic cylinder 118 pushes the swing The rod 117 rotates toward the second partition shell 111, and at the same time, the rocker arm 117 drives the inner wall of the receiving groove 71 to squeeze the pin shaft 51 at one end of several groups of active rods 116, so that the pin shaft 51 slides along the receiving groove 71, and at the same time, the pin shaft 51 together with the movable rod 115 and the movable plate 114 move toward the other group of electric push rods 103, and the moving movable plate 114 pushes the oil on the inner wall of the segmented groove 113 away, and the pushed away oil is discharged through the rectangular groove 1011 until the movable plate 114 is in close contact with the other end of the segmented groove 113, thereby realizing the cleaning of the oil on the inner wall of the segmented groove 113. The operation is simple and convenient, which is convenient for the staff to clean the oil on the inner wall of the segmented groove 113.

[0031] Working principle: Open the manual valve on the feed pipe 3, and the oil extracted from the oil well flows into the gas-liquid separation box 2 through the feed pipe 3. When the oil falls on the spiral plate 6, the difference in gas and liquid density is used to make the gas rise, thus achieving preliminary separation of gas and liquid. Then the oil will rotate downward along the spiral plate 6 in the gas-liquid separation box 2. The centrifugal force generated by the rotation quickly separates the gas and liquid in the oil. The separated gas flows upward and is discharged through the gas outlet 4. At the same time, the separated liquid falls into the buffer chamber 21 in the centrifugal box 1. Then the liquid is discharged by The buffer chamber 21 flows into the centrifugal chamber 22. At this time, the centrifugal disc 8 is driven by the motor to rotate rapidly. The rotating centrifugal disc 8 causes the liquid in the centrifugal chamber 22 to rotate. The centrifugal force generated by the rotation separates the oil and the water with high density from each other until the liquid in the centrifugal chamber 22 overflows the outlet 23 and the liquid falls into the first separation chamber 901 in the oil-liquid separation box 9 through the outlet 23. During the accumulation of the liquid in the first separation chamber 901, the oil in the first separation chamber 901 begins to stratify, with the upper layer being oil and the lower layer being water, until the upper layer of oil overflows the second partition 10. The oil flows into the second separation chamber 902, and the oil is separated from the water again in the second separation chamber 902 until the oil in the upper layer of the second separation chamber 902 overflows the third partition plate 11, causing the oil to flow into the oil storage chamber 903. Then, the oil in the oil storage chamber 903 is discharged through the oil outlet pipe 12. As the water in the first separation chamber 901 and the second separation chamber 902 continues to accumulate, the oil-water boundary between the first separation chamber 901 and the second separation chamber 902 will submerge the transmittance sensor probe 15. Since the transmittance of oil is lower than that of water, the transmittance sensor probe 1 When facing water, the transmittance of the liquid is detected to decrease. At this time, the transmittance sensor probe 15 controls the electric valves 13 at the bottom of the first separation chamber 901 and the second separation chamber 902 to open through the rear-end control module. The water in the first separation chamber 901 and the second separation chamber 902 is discharged through the liquid outlet pipe 14. Within a certain period of time, the discharged gas is measured by the gas flow meter at the end of the gas outlet nozzle 4, and the oil and water are measured respectively by the liquid flow meter connected to the oil outlet pipe 12 and the liquid outlet pipe 14. The measured data are used to obtain the phase fraction of the oil. When cleaning the water and oil in the first separation chamber 901 and the second separation chamber 902, first start the electric push rod 103 on the second partition 10, and the electric push rod 103 pushes the first inner plate 102 to slide along the inner cavity of the first partition shell 101, so that the liquid groove 1021 on the first inner plate 102 is opposite to the rectangular grooves 1011 on both sides of the first partition shell 101. At this time, the first separation chamber 901 and the second separation chamber 902 will be connected, and the liquids in the first separation chamber 901 and the second separation chamber 902 will be mixed together. After the liquids in the first separation chamber 901 and the second separation chamber 902 are separated again, start the transmittance sensor probe 15 to separate the first separation chamber 901 and the second separation chamber 902. The water in the cavity 902 is discharged until the transmittance sensor probe 15 detects the intersection of water and oil. Then, another set of electric push rods 103 pushes the second inner plate 112, and the second inner plate 112 slides along the inner cavity of the second partition shell 111. Among the several sets of segmented grooves 113 distributed on the second inner plate 112, the segmented groove 113 located at the top will first face the corresponding rectangular groove 1011. The push of the other set of electric push rods 103 is paused to allow the oil to be discharged through the uppermost segmented groove 113. Then, the electric push rods 103 are started again to allow the oil to be discharged in sections through several sets of segmented grooves 113. The further down, the smaller the diameter of the segmented groove 113, so that the flow rate and flow rate of the oil discharge are continuously reduced. After several groups of segmented grooves 113 are facing several groups of rectangular grooves 1011, the oil in the first separation chamber 901 and the second separation chamber 902 will be drained. At this time, the remaining water in the first separation chamber 901 and the second separation chamber 902 will be drained. In the initial state, the movable plate 114 is close to one end of the segmented groove 113, and then the hydraulic cylinder 118 is started. The hydraulic cylinder 118 pushes the rocker rod 117 to rotate toward the second partition shell 111. At the same time, the rocker rod 117 drives the inner wall of the receiving groove 71 to squeeze the pin shaft 51 at one end of several groups of active rods 116, so that the pin shaft 51 slides along the receiving groove 71. At the same time, the pin shaft 51, together with the movable rod 115 and the movable plate 114, moves toward another group of electric push rods 103, and the moving movable plate 114 pushes away the oil on the inner wall of the segmented groove 113. The pushed away oil is discharged through the rectangular groove 1011 until the movable plate 114 is close to the other end of the segmented groove 113.

[0032] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-well multiphase metering device, comprising a centrifuge box (1), characterized in that: The upper end of the centrifugal box (1) is connected to a gas-liquid separation box (2), a feed pipe (3) is provided on one side of the upper end of the gas-liquid separation box (2), an air outlet nozzle (4) is provided on the other side of the upper end of the gas-liquid separation box (2), a fixed column (5) is fixedly installed in the gas-liquid separation box (2), a spiral plate (6) is fixedly sleeved on the fixed column (5), one end of the gas-liquid separation box (2) is connected to an oil-liquid separation box (9), a second partition (10) and a third partition (11) are fixedly installed in the oil-liquid separation box (9), an oil outlet pipe (12) is opened at one end of the oil-liquid separation box (9), and two sets of transmittance sensor probes (15) are fixedly installed on one side of the oil-liquid separation box (9); A main partition (7) is provided in the centrifugal box (1), and the main partition (7) divides the interior of the centrifugal box (1) into a buffer chamber (21) and a centrifugal chamber (22). A centrifugal disc (8) is rotatably installed in the centrifugal chamber (22). An outlet (23) is provided at one end of the centrifugal box (1). The second partition (10) and the third partition (11) divide the interior of the oil-liquid separation box (9) into a first separation chamber (901), a second separation chamber (902), and an oil storage chamber (903). The two groups of transmittance sensor probes (15) face the first separation chamber (901) and the second separation chamber (902), respectively. Electric valves (13) are provided at the bottom of the first separation chamber (901) and the second separation chamber (902). The two groups of electric valves (13) are both connected to a liquid outlet pipe (14). The oil outlet pipe (12) is connected to the oil storage chamber (903). The outlet (23) is used to connect the first separation chamber (901) and the centrifugal chamber (22).

2. A single-well multiphase metering device according to claim 1, characterized in that: The second separator (10) comprises: A first baffle shell (101), the first baffle shell (101) being fixedly mounted in the oil-liquid separation box (9); A first inner plate (102) slidably connected to the inner cavity of the first partition shell (101); An electric push rod (103), the end of which passes through the first partition housing (101) and the outer ring of the oil-liquid separation box (9) and is fixedly connected to one end of the first inner plate (102); The electric push rod (103) is fixedly mounted on a support base (104), and the support base (104) is fixedly connected to the outside of the oil-liquid separation box (9).

3. The single-well multiphase metering device according to claim 2, characterized in that: Two or more groups of rectangular grooves (1011) are provided at equal distances on both sides of the first partition shell (101), and a liquid passage groove (1021) is provided on the first inner plate (102).

4. The single-well multiphase metering device according to claim 3, characterized in that: The liquid-passing groove (1021) is used to connect the rectangular grooves (1011) on both sides of the first partition shell (101).

5. The single-well multiphase metering device according to claim 4, characterized in that: The third separator (11) comprises: a second partition shell (111), the second partition shell (111) being fixedly mounted in the oil-liquid separation box (9); A second inner plate (112) slidably connected to the inner cavity of the second partition shell (111); A plurality of groups of segmented grooves (113) are provided on the second inner plate (112) at equal intervals.

6. The single-well multiphase metering device according to claim 5, characterized in that: The volumes of the plurality of groups of segmented grooves (113) decrease sequentially from top to bottom.

7. The single-well multiphase metering device according to claim 6, characterized in that: The third partition (11) further comprises: A plurality of groups of movable plates (114), wherein the plurality of groups of movable plates (114) are respectively slidably connected to the plurality of groups of segmented grooves (113); One end of a plurality of groups of movable plates (114) is respectively connected to a plurality of groups of movable rods (115); An active rod (116) fixedly connected to the lower side of one end of the second inner plate (112); A swing rod (117), the lower end of which is hingedly connected to the active rod (116); A hydraulic cylinder (118), wherein the lower end of the hydraulic cylinder (118) is hinged to the active rod (116), and the upper end of the hydraulic cylinder (118) is hinged to the swing rod (117).

8. The single-well multiphase metering device according to claim 7, characterized in that: A first through hole (31) is formed at one end of each of the plurality of groups of segmented grooves (113), and one end of the movable rod (115) passes through the first through hole (31) and is connected to the movable plate (114).

9. The single-well multiphase metering device according to claim 8, characterized in that: A plurality of groups of second through holes (91) are formed at equal distances on one side of the oil-liquid separation box (9) and the second partition shell (111), and the other end of the movable rod (115) passes through the second through hole (91). A guide hole (92) is also formed on one side of the oil-liquid separation box (9) and the second partition shell (111), and the active rod (116) passes through the guide hole (92).

10. The single-well multiphase metering device according to claim 9, characterized in that: The active rods (116) of the plurality of groups are shortened from top to bottom. A pin shaft (51) is provided at one end of the active rod (116). A receiving groove (71) is provided on the rocker rod (117), and the pin shaft (51) is located in the receiving groove (71).

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