Multi-well type metering device

Abstract

The invention relates to the technical field of metering devices, and provides a multi-well type metering device which comprises a well selection switching mechanism, a metering mechanism, a liquid discharge pipe and a microwave detection mechanism used for detecting the water content of crude oil. The well selection switching mechanism comprises a plurality of single-well oil pipes connected with wells, a distribution barrel connected with the single-well oil pipes and a valve seat arranged in the distribution barrel and fixedly connected with the distribution barrel, a plurality of circulating openings are formed in the valve seat in a circumferential mode, and the interiors of the single-well oil pipes communicate with the interiors of the corresponding circulating openings correspondingly. A well selection pipe communicating with the interior of the circulation opening is rotationally connected to the interior of the distribution cylinder, the side face of the well selection pipe abuts against the side face of the valve seat, one side of the well selection pipe is connected with a rotating motor, the rotating motor is fixed to the side face of the distribution cylinder, and the other side of the well selection pipe is connected with an oil conveying pipeline. The problem that in the prior art, a metering device can only measure a single well is solved, and the problem that when the water content is detected, workers need to run to multiple directions for sampling is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of metering devices, and in particular to a multi-well metering device. Background Art

[0002] Intelligent metering devices play an important role in oilfield development and management. They are mainly used to accurately measure and intelligently control parameters such as oil well production and water content. They combine advanced automation technology, computer technology and sensor technology to improve metering accuracy, automation and data processing capabilities, and effectively reduce manual labor intensity and error rate.

[0003] Existing metering devices can usually only measure the production of a single oil well. If multiple oil wells need to be inspected, multiple sets of metering devices need to be installed, which may result in a larger overall size and complex structure of the equipment, thereby increasing the difficulty of maintenance and installation. In addition, when staff need to detect the water content of crude oil in multiple oil wells, the traditional detection method requires manual sampling of the oil pipeline of each well. If the oil wells and oil pipelines are more dispersed, inspectors need to go to multiple locations for sampling, which not only greatly reduces work efficiency, but also increases labor intensity. Summary of the invention

[0004] The present invention proposes a multi-well metering device, which solves the problem that the metering device in the related art can only measure a single well, and the problem that when detecting the water content, the staff needs to run to multiple directions for sampling.

[0005] The technical solution of the present invention is as follows: A multi-well metering device, including a well selection switching mechanism, a metering mechanism, a drainage pipe and a microwave detection mechanism for detecting the water content of crude oil, the well selection switching mechanism including a plurality of single-well oil pipes connected to the wells, a distribution cylinder connected to the plurality of single-well oil pipes, a valve seat arranged inside the distribution cylinder and fixedly connected to the distribution cylinder, the valve seat is provided with a plurality of circumferentially arranged flow ports, and the interior of each single-well oil pipe is respectively connected to the interior of the corresponding flow ports, the interior of the distribution cylinder is rotatably connected with a well selection pipe connected to the interior of the flow port, and the side surface of the well selection pipe is in conflict with the side surface of the valve seat, one side of the well selection pipe is connected to a rotating motor, and the rotating motor is fixed to the side surface of the distribution cylinder, the other side of the well selection pipe is connected to an oil pipeline, and one side of the oil pipeline passes through the valve seat, the side surface of the distribution cylinder and is connected to the interior of the metering mechanism, the metering mechanism is connected to the drainage pipe through a liquid outlet pipe, and the microwave detection mechanism is arranged on the liquid outlet pipe.

[0006] Furthermore, the metering mechanism includes a cyclone separator connected to the inside of the well selection pipe through an oil pipeline, a metering tank connected to the cyclone separator, a gas flowmeter and a liquid flowmeter, the liquid outlet pipe is arranged at the bottom of the metering tank and is connected to the inside of the metering tank, and the other end of the liquid outlet pipe is connected to the inside of the discharge pipe, the liquid flowmeter is arranged on the liquid outlet pipe, the top of the metering tank is connected to a gas phase pipe, and the gas phase pipe is connected to the inside of the discharge pipe, and the gas flowmeter is arranged on the gas phase pipe.

[0007] Furthermore, a sewage cavity is provided on the side of the distribution cylinder away from the rotating motor, and a first sewage pipe is provided on one side of each of the single-well oil pipes. The side of the first sewage pipe away from the single-well oil pipe is connected to the inside of the sewage cavity. A second sewage pipe is provided at the bottom of the sewage cavity, and a manifold is connected to the bottom of the second sewage pipe. A first stop valve is provided on the single-well oil pipe, the first sewage pipe and the second sewage pipe.

[0008] Furthermore, a plurality of annular sealing grooves are provided on a side of the valve seat close to the well rotating pipe, and each annular sealing groove is respectively arranged on one side of the circulation port, a first elastic member is provided inside the annular sealing groove, one end of the first elastic member is abutted against the side of the annular sealing groove, the other end of the first elastic member is connected to an annular sealing block, and an outer surface of the annular sealing block on one side outside the annular sealing groove is provided with a first annular inclined surface, an annular clamping groove is provided on a side of the well selection pipe close to the circulation port, and the annular sealing block is clamped with the annular clamping groove, a second annular inclined surface is provided on one side of the annular clamping groove which is slidably connected to the first annular inclined surface, and the side surface of the well selection pipe is in an arc shape.

[0009] Furthermore, the microwave detection mechanism includes a sampling tube, a second stop valve arranged on both sides of the sampling tube, a detection box, a microwave water detector, and a sampling pump. One end of the sampling tube is connected to the liquid outlet pipe, and the other end of the sampling tube is also connected to the inside of the liquid outlet pipe. The detection box is arranged on the sampling tube and is located between the two second stop valves, and the sampling tube is connected to the inside of the detection box. The microwave water detector is arranged on the side of the detection box, and the sampling pump is arranged to be connected to the sampling tube.

[0010] Furthermore, a cleaning mechanism is provided inside the detection box, and the cleaning mechanism includes a cleaning piston, a plurality of cleaning nozzles arranged on the cleaning piston, a gas diverter for connecting each cleaning nozzle, and a gas supply source. The cleaning piston is arranged inside the detection box and is slidingly connected to the inner wall of the detection box. The gas diverter is arranged on the side of the cleaning piston away from the cleaning nozzle, and the gas diverter is connected to the gas supply source through a gas supply hose. A third sewage pipe is provided on the side of the detection box away from the cleaning piston.

[0011] Furthermore, a side of the cleaning piston away from the cleaning nozzle is connected to a movable piston via a plurality of connecting columns, a telescopic driving mechanism is fixedly connected to the side of the detection box, and a telescopic rod of the telescopic driving mechanism is connected to the movable piston, a side of the cleaning piston close to and away from the gas diverter is provided with a plurality of jet grooves, and each jet groove is circumferentially arranged with the center of the circle of the cleaning piston as the center, each of the cleaning nozzles is arranged inside the jet groove, a slide groove is provided on one side of each of the jet grooves, and the slide groove is connected to the inside of the jet groove, a baffle for blocking the jet groove is slidably connected inside the slide groove, an accommodating space is provided inside the cleaning piston, and a connecting rod mechanism for disengaging each baffle from the jet groove is provided inside the accommodating space.

[0012] Furthermore, the connecting rod mechanism includes a rotating shaft rotatably connected to the accommodating space, a plurality of first connecting rods fixedly connected to the rotating shaft, second connecting rods respectively rotating with the first connecting rods, gears, racks, second elastic members, and a pushing piston, wherein one end of each second connecting rod away from the first connecting rod is respectively rotatably connected to the baffle, a rotating groove is provided inside the movable piston, one end of the rotating shaft extends into the rotating groove, the gear is arranged on a side of the rotating shaft inside the rotating groove, a pushing groove is provided on the top of the rotating groove, the rack is arranged inside the pushing groove and meshes with the gear, one end of the second elastic member abuts against the rack, and the other end of the second elastic member abuts against the side of the pushing groove, the pushing piston is arranged on a side of the rack away from the second elastic member, and is slidably connected to the inner wall of the pushing groove, an injection port is provided on the side of the movable piston, and the injection port is arranged between the pushing piston and the side of the pushing groove, and the injection port is connected to the air supply source through an injection hose.

[0013] Furthermore, an overflow valve is provided on the gas injection hose, and one end of the gas supply hose is connected to the overflow port of the overflow valve.

[0014] The working principle and beneficial effects of the present invention are: During use, the staff can connect the oil pipelines of multiple single wells to the single well oil pipeline respectively. When a single well needs to be measured, the operator starts the rotating motor, which will drive the well selection pipe to rotate and connect it to the corresponding flow port. At this time, the crude oil in the single well oil pipe enters the well selection pipe through the flow port, and then the crude oil will enter the metering mechanism through the oil pipeline for metering. When the metering is completed, the crude oil enters the discharge pipe through the liquid outlet pipe. When another single well needs to be measured, the operator also starts the rotating motor and connects the well selection pipe to the corresponding flow port, thereby solving the problem that the metering device in traditional technology can only measure a single well. At the same time, the device can achieve metering of multiple wells with only one metering mechanism, occupies a small area, and is easy to install and maintain.

[0015] Secondly, when the operator needs to detect the water content in the crude oil of a single well, he can start the rotating motor and move the well selection pipe to the corresponding flow port. At this time, the crude oil will flow to the liquid outlet pipe through the well selection pipe, the oil pipeline and the metering mechanism in turn, and the operator can detect the water content of the crude oil through the microwave detection mechanism. When it is necessary to detect another oil well, the operator also starts the rotating motor and connects the well selection pipe to the corresponding flow port. Since the detection position remains unchanged, the operator does not need to run around multiple detection points, thereby reducing the work intensity and improving work efficiency.

[0016] In addition, microwave detection agencies can usually complete measurements in a very short time. Compared with traditional manual sampling and chemical analysis methods, microwave detection does not require waiting for laboratory results or manual processing, and can provide water content data in real time, further improving work efficiency. Microwave technology can also achieve continuous online monitoring, reflecting the water content of crude oil in oil wells or oil pipelines in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a connection diagram of the first embodiment of the present invention; Figure 2 This is a schematic diagram of the distribution tube and single well oil pipe structure in Example 1; Figure 3 for Figure 2 Schematic diagram of partial structure section; Figure 4 This is an exploded schematic diagram of the well pipe, the first elastic member, and the annular sealing block in the second embodiment; Figure 5 A schematic cross-sectional view of the local structure of the distribution tube in the second embodiment; Figure 6 for Figure 5 The enlarged schematic diagram at A in the middle; Figure 7 This is a schematic diagram of the cleaning structure in Example 3; Figure 8 It is a schematic cross-sectional view of the local structure of the detection box in the third embodiment; Fig. 9 It is a schematic cross-sectional view of the local structure of the cleaning piston in the third embodiment; Fig.10 This is a cross-sectional view of the cleaning piston in Example 3; Fig.11 This is a schematic diagram of the structure of the air supply source, air supply hose, movable piston, and cleaning piston in Example 3; Fig.12 for Fig.11 The enlarged schematic diagram of point B in the middle; Fig.13This is a schematic diagram of the connection of the gas supply source, gas supply hose, movable piston, cleaning piston, overflow valve, gas diverter, and gas supply hose in Example 3 or Example 4.

[0019] In the figure: 1, single well oil pipe; 101, distribution cylinder; 102, valve seat; 103, flow port; 104, well selection pipe; 105, rotating motor; 106, oil pipeline; 107, liquid outlet pipe; 108, liquid discharge pipe; 2, cyclone separator; 201, metering tank; 202, gas flow meter; 203, liquid flow meter; 204, gas phase pipe; 3, sewage chamber; 301, first sewage pipe; 302, second sewage pipe; 303, manifold; 304, first stop valve; 4, annular sealing groove; 401, first elastic member; 402, annular sealing block; 403, first annular slope; 404, second annular slope; 405, sealing pad; 406, annular groove; 5, sampling tube; 501, second stop valve; 502, detection box; 503, microwave water meter; 504, sampling pump; 6, cleaning piston; 601, cleaning nozzle; 602, gas diverter; 603, gas supply source; 604, gas supply hose; 605, third sewage pipe; 606, moving piston; 607, connecting column; 608, telescopic drive mechanism; 7, jet slot; 701, slide slot; 702, baffle; 703, accommodating space; 704, rotating shaft; 705, first connecting rod; 706, second connecting rod; 707, gear; 708, rack; 709, second elastic member; 710, pushing piston; 711, rotating slot; 712, gas injection port; 713, gas injection hose; 714, pushing slot; 715, limit rod; 716, overflow valve. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1:

[0022] refer to Figure 1-3A multi-well metering device includes a well selection switching mechanism, a metering mechanism, a liquid discharge pipe 108, and a microwave detection mechanism for detecting the water content of crude oil. The well selection switching mechanism includes a plurality of single-well oil pipes 1 connected to wells, a distribution cylinder 101 connected to the plurality of single-well oil pipes 1, a valve seat 102 arranged inside the distribution cylinder 101 and fixedly connected to the distribution cylinder 101, a plurality of circumferentially arranged flow ports 103 are arranged on the valve seat 102, and the interior of each single-well oil pipe 1 is respectively connected to the interior of the corresponding flow port 103, and the interior of the distribution cylinder 101 is rotatably connected to the interior of the flow port 103. A well selection pipe 104 is connected to the valve seat 102, and the side of the well selection pipe 104 is in conflict with the side of the valve seat 102. A rotating motor 105 is connected to one side of the well selection pipe 104, and the rotating motor 105 is fixed to the side of the distribution cylinder 101. The output end of the rotating motor 105 is connected to the well selection pipe 104. The other side of the well selection pipe 104 is connected to an oil pipeline 106, and one side of the oil pipeline 106 passes through the valve seat 102 and the side of the distribution cylinder 101 and is connected to the inside of the metering mechanism. The metering mechanism is connected to the liquid discharge pipe 108 through a liquid outlet pipe 107, and a microwave detection mechanism is arranged on the liquid outlet pipe 107.

[0023] Specifically, the metering mechanism includes a cyclone separator 2 connected to the inside of the well selection pipe 104 through an oil pipeline 106, a metering tank 201 connected to the cyclone separator 2, a gas flowmeter 202 and a liquid flowmeter 203, a liquid outlet pipe 107 is arranged at the bottom of the metering tank 201 and is connected to the inside of the metering tank 201, and the other end of the liquid outlet pipe 107 is connected to the inside of the drain pipe 108, the liquid flowmeter 203 is arranged on the liquid outlet pipe 107, the top of the metering tank 201 is connected to a gas phase pipe 204, and the gas phase pipe 204 is connected to the inside of the drain pipe 108, and the gas flowmeter 202 is arranged on the gas phase pipe 204.

[0024] First, the crude oil will be separated into gas and liquid through the cyclone separator 2. The multiphase flow of different flow states will be completely separated after forming laminar flow to the maximum extent. Due to the cyclone effect, a cyclone field is formed inside the cyclone separator 2 under the combined action of centrifugal force, gravity and buoyancy. The liquid phase with high density flows along the tube wall to the bottom of the separation unit, and the gas phase with low density rises to the top of the cyclone separator 2 along the center of the cyclone field, realizing the separation of gas and liquid phases. Then, the separated gas phase and liquid phase fluids are discharged through the gas phase pipe 204 and the liquid outlet pipe 107 respectively, and are measured separately by the gas flow meter 202 and the liquid flow meter 203 respectively, so as to obtain various data of crude oil in a single well. The flow characteristics and physical properties of the gas phase and the liquid phase are quite different. When mixed together, it may cause measurement errors in the flow meter or other measuring instruments. By measuring separately, the measurement errors caused by bubbles or gas can be reduced, and the accuracy of equipment measurement can be improved.

[0025] In addition, a fourth drain pipe can be provided at the bottom of the cyclone separator 2 and the metering tank 201, and an electric valve can be installed on the drain pipe. The first drain pipe 301 can be connected to the drain pipe 108, so that after completing the crude oil detection of an oil well, when switching to the next oil well, the residual fluid in the cyclone separator 2 and the metering tank 201 can be discharged cleanly, thereby reducing the influence of the residual fluid on the detection accuracy of the next oil well.

[0026] During the long sedimentation process of oil wells, impurities such as sand, minerals, wastewater, and oil sludge may be mixed in. Therefore, when crude oil is extracted for measurement, it is usually necessary to discharge a portion of the crude oil to ensure that the measurement or test results are more accurate and representative.

[0027] In order to achieve the above-mentioned purpose, the present embodiment sets a sewage chamber 3 on the side of the distribution cylinder 101 away from the rotating motor 105, and each single-well oil pipe 1 is provided with a first sewage pipe 301 on one side, and the side of the first sewage pipe 301 away from the single-well oil pipe 1 is connected to the inside of the sewage chamber 3, and a second sewage pipe 302 is provided at the bottom of the sewage chamber 3, and a manifold 303 is connected to the bottom of the second sewage pipe 302, and a first stop valve 304 is provided on the single-well oil pipe 1, the first sewage pipe 301, and the second sewage pipe 302.

[0028] When it is necessary to measure the crude oil of a single well, the operator first opens the stop valve on the first sewage pipe 301, so that part of the crude oil enters the sewage chamber 3 through the first sewage pipe 301, and then is discharged into the manifold 303 through the second sewage pipe 302 at the bottom of the sewage chamber 3. By discharging sewage, the measurement and detection accuracy of the metering device for crude oil can be improved. After a period of discharge, the operator closes the stop valve on the first sewage pipe 301 and opens the stop valve on the single well oil pipe 1 to measure the crude oil. (It is worth noting that the stop valves on the single well oil pipe 1, the first sewage pipe 301, and the second sewage pipe 302 can all be replaced with electric valves.).

[0029] Further, the microwave detection mechanism includes a sampling tube 5, a second stop valve 501 arranged on both sides of the sampling tube 5, a detection box 502, a microwave water detector 503, and a sampling pump 504. One end of the sampling tube 5 is connected to the liquid outlet pipe 107, and the other end of the sampling tube 5 is also connected to the inside of the liquid outlet pipe 107. The detection box 502 is arranged on the sampling tube 5 and is located between the two second stop valves 501, and the sampling tube 5 is connected to the inside of the detection box 502. The microwave water detector 503 is arranged on the side of the detection box 502 and is fixedly connected to the inspection box. The sampling pump 504 is connected to the sampling tube 5. The microwave water detector 503 in this embodiment detects the water content by utilizing the propagation characteristics of microwave signals in crude oil samples. When the microwave signal passes through crude oil, the absorption and scattering characteristics of water molecules and oil molecules to microwaves are different, and water molecules absorb microwave signals more strongly. Therefore, the instrument determines the proportion of water in crude oil by emitting microwaves and receiving the reflected signals, analyzing the intensity changes of the reflected signals. In addition, the microwave water meter 503 can be electrically connected to the control end, and the data measured by the microwave water meter 503 can be transmitted to the control end in real time for the convenience of staff to view.

[0030] Since the gas or bubbles in the crude oil will affect the propagation speed and reflection signal of the microwave, thereby causing deviation in the measurement result, the microwave detection mechanism is arranged on the liquid outlet pipe 107 of the cyclone separator 2 in this embodiment, so that the cyclone separator 2 can effectively separate the gas component in the crude oil, reduce the interference of bubbles on the microwave measurement, and thus improve the accuracy of the water content measurement.

[0031] When the operator needs to conduct a test, he can open the second stop valve 501 (the second stop valve 501 can also be an electric valve) near the side of the metering tank 201, and then start the sampling pump 504 to pump the crude oil in the liquid outlet pipe 107 into the detection box 502. Then close the second stop valve 501 and start the microwave water detector 503, which will detect the water content of the static crude oil in the detection box 502. The test results can be transmitted to the control terminal of the staff in real time or displayed on the screen of the microwave water detector 503, so that the staff can check them conveniently.

[0032] After the detection is completed, the operator can open the second stop valve 501 again, start the sampling pump 504, and transport the crude oil in the detection box 502 back to the liquid outlet pipe 107 to reduce the waste of crude oil.

[0033] In addition, the microwave detection mechanism in this embodiment replaces the traditional manual sampling operation process, significantly reducing the workload and labor intensity of the staff. At the same time, the operator can adjust the detection frequency according to actual needs to further improve the representativeness of the detection results.

[0034] Working principle: During use, the staff can connect the oil pipelines of multiple single wells to the single well oil pipeline 1 respectively, and close the first stop valve 304 on each single well oil pipeline 1 at the same time. When it is necessary to measure a single well, first start the rotating motor 105, the rotating motor 105 will drive the well selection pipe 104 to rotate, and connect with the corresponding flow port 103. Then, open the first stop valve 304 on the corresponding single well oil pipeline 1. At this time, the crude oil in the single well oil pipeline 1 enters the well selection pipe 104 through the flow port 103, and then the crude oil will enter the cyclone separator 2 through the oil pipeline 106. The crude oil will be separated into gas and liquid under the action of the cyclone separator 2. Then, the separated gas phase and liquid phase fluids are discharged through the gas phase pipe 204 and the liquid outlet pipe 107 respectively, and are separately measured by the gas flow meter 202 and the liquid flow meter 203, so as to obtain various data of the crude oil in the single well.

[0035] After the metering is completed, the crude oil enters the discharge pipe 108 through the liquid outlet pipe 107. When another single well needs to be metered, the operator starts the rotating motor 105 and connects the well selection pipe 104 to the corresponding flow port 103, thereby solving the problem that the metering device in the traditional technology can only measure a single well. At the same time, the device can achieve metering of multiple wells with only one metering mechanism, occupies a small area, and is easy to install and maintain.

[0036] In addition, when the operator needs to detect the water content in the crude oil of a single well, the rotating motor 105 can be started to move the well selection pipe 104 to the corresponding circulation port 103. At this time, the crude oil will flow to the liquid outlet pipe 107 through the well selection pipe 104, the oil pipeline 106, the cyclone separator 2 and the metering tank 201 in sequence, and the operator can detect the water content of the crude oil through the microwave detection mechanism. When it is necessary to detect another oil well, the operator also starts the rotating motor 105 to connect the well selection pipe 104 to the corresponding circulation port 103. Since the detection position remains unchanged, the operator does not need to run around multiple detection points, thereby reducing the work intensity and improving the work efficiency.

[0037] During the test, the second stop valve 501 near the metering tank 201 is opened, and then the sampling pump 504 is started to draw the crude oil in the liquid outlet pipe 107 into the test box 502. Then the second stop valve 501 is closed, and the microwave water detector 503 is started. The microwave water detector 503 will detect the water content of the static crude oil in the test box 502. The test results can be transmitted to the control terminal of the staff in real time or displayed on the screen of the microwave water detector 503, which is convenient for the staff to check.

[0038] Embodiment 2:

[0039] Based on Example 1, refer to Figure 4-6In order to improve the sealing performance between the well selection pipe 104 and the valve seat 102, in this embodiment, a plurality of annular sealing grooves 4 are arranged on the side of the valve seat 102 close to the well rotating pipe, and each annular sealing groove 4 is respectively arranged on one side of the flow port 103, a first elastic member 401 is arranged inside the annular sealing groove 4, one end of the first elastic member 401 is abutted against the side of the annular sealing groove 4, the other end of the first elastic member 401 is connected to an annular sealing block 402, and the annular sealing block 402 is provided with a first annular inclined surface 403 on the outer surface of one side outside the annular sealing groove 4, an annular groove 406 is arranged on the side of the well selection pipe 104 close to the flow port 103, and the annular sealing block 402 is clamped with the annular groove 406, a sealing gasket 405 is arranged at the bottom of the annular groove 406, and a second annular inclined surface 404 slidably connected to the first annular inclined surface 403 is arranged on one side of the annular groove 406, and the side of the well selection pipe 104 is in an arc shape.

[0040] When the well selection pipe 104 rotates under the drive of the rotating motor 105, one side of the well selection pipe 104 is in an arc-shaped structure, which will squeeze the annular sealing block 402. Due to the provision of the first annular inclined surface 403, the well selection pipe 104 will gradually press the annular sealing block 402 into the sealing groove and squeeze the first elastic member 401. When the well selection pipe 104 is completely docked with the flow port 103, the first elastic member 401 will restore its deformation, push the annular sealing block 402 into the annular groove 406, and contact the sealing gasket 405. Under the action of the first elastic member 401, the sealing block always keeps in contact with the sealing gasket 405, thereby improving the sealing between the well selection pipe 104 and the surface of the valve seat 102, reducing the possibility of crude oil leakage through the gap between the well selection pipe 104 and the surface of the valve seat 102, and ensuring the accuracy of measurement.

[0041] When it is necessary to change a single well, first close the first stop valve 304 on the corresponding single well oil pipe 1, and then start the rotating motor 105 to drive the well selection pipe 104 to rotate. Under the action of the second annular inclined surface 404 on the well selection pipe 104, the annular clamping block will gradually disengage from the annular clamping groove 406. The switching can be completed by simply rotating the motor 105 to overcome the elastic force of the first elastic member 401.

[0042] Embodiment three:

[0043] Based on the first embodiment, Figure 7-13In order to improve the detection accuracy of the water content of crude oil, the present embodiment provides a cleaning mechanism inside the detection box 502, the cleaning mechanism comprising a cleaning piston 6, a plurality of cleaning nozzles 601 arranged on the cleaning piston 6, a gas diverter 602 for connecting the cleaning nozzles 601, and a gas supply source 603. The cleaning piston 6 is arranged inside the detection box 502 and is slidably connected to the inner wall of the detection box 502. The gas diverter 602 is arranged on the side of the cleaning piston 6 away from the cleaning nozzle 601, and the gas diverter 602 is connected to the gas supply source 603 through a gas supply hose 604. A third sewage pipe 605 is provided on the side of the detection box 502 away from the cleaning piston 6. The third sewage pipe 605 is connected to the inside of the detection box 502, and an electric valve is also provided on the third sewage pipe 605 for controlling the on and off of the third sewage pipe 605.

[0044] When the microwave detection mechanism completes a single well detection, before the next single well detection, the operator can supply air to the cleaning nozzle 601, and the high-pressure airflow sprayed by the cleaning nozzle 601 will remove the residual crude oil and discharge it from the detection box 502 through the third sewage pipe 605 (it should be noted that when the cleaning mechanism is used, the second stop valves 501 at both ends of the sampling tube 5 are in a closed state). This can ensure that the detection of the water content of the crude oil in the next single well is more accurate and improve the reliability of the data.

[0045] In addition, the use of high-pressure cleaning nozzle 601 can efficiently remove a large amount of viscous crude oil in a short time, thereby improving the detection efficiency. Compared with traditional mechanical cleaning methods (such as scrapers, brushes, etc.), the high-pressure nozzle uses the impact force of the airflow to clean, avoiding friction on the inside of the detection box 502, reducing the risk of surface damage and corrosion, and thus extending the service life of the detection box 502.

[0046] Furthermore, the side of the cleaning piston 6 away from the cleaning nozzle 601 is connected to the mobile piston 606 through a plurality of connecting columns 607, and the side of the detection box 502 is fixedly connected to a telescopic driving mechanism 608, and the telescopic rod of the telescopic driving mechanism 608 is connected to the mobile piston 606. The telescopic driving mechanism 608 can adopt a cylinder or a hydraulic cylinder, and this embodiment does not impose too many restrictions on this.

[0047] By providing the telescopic driving mechanism 608, the movable piston 606 can drive the cleaning nozzle 601 to move in the cleaning box, thereby expanding the cleaning range and ensuring that the crude oil in the box can be completely discharged.

[0048] Since crude oil may contain solid impurities, these impurities may accumulate in the nozzle or other small channels of the cleaning nozzle 601 when entering the detection box 502, causing the nozzle to be blocked. After being blocked, the injection flow of the nozzle may be reduced, thereby affecting the cleaning effect and the normal operation of the equipment. In addition, solid impurities may cause friction and wear on the surface of the nozzle during the flow of crude oil, especially hard impurities (such as sand and mineral particles) acting on the nozzle for a long time, which will accelerate its wear and reduce its service life.

[0049] In order to reduce the occurrence of this situation, a plurality of jet grooves 7 are provided on the side of the cleaning piston 6 close to and away from the gas diverter 602, and each jet groove 7 is circumferentially arranged with the center of the cleaning piston 6 as the center, and each cleaning nozzle 601 is arranged inside the jet groove 7. A slide groove 701 is provided on one side of each jet groove 7, and the slide groove 701 is connected to the inside of the jet groove 7. A baffle 702 for blocking the jet groove 7 is slidably connected inside the slide groove 701. An accommodating space 703 is provided inside the cleaning piston 6, and a connecting rod mechanism is provided inside the accommodating space 703 to enable each baffle 702 to separate from the jet groove 7.

[0050] By setting the jet slot 7 and the baffle 702, a physical barrier can be formed on the surface of the cleaning nozzle 601 to prevent the hard impurities in the crude oil from wearing the cleaning nozzle 601, thereby increasing the service life of the cleaning nozzle 601 and ensuring the reliability and stability of the cleaning mechanism under long-term use.

[0051] Specifically, the connecting rod mechanism includes a rotating shaft 704 rotatably connected to the accommodating space 703, a plurality of first connecting rods 705 fixedly connected to the rotating shaft 704, second connecting rods 706 respectively rotating with the first connecting rods 705, gears 707, racks 708, second elastic members 709, and a pushing piston 710. One end of each second connecting rod 706 away from the first connecting rod 705 is respectively rotatably connected to the baffle 702. A rotating groove 711 is provided inside the mobile piston 606. One end of the rotating shaft 704 extends into the rotating groove 711. The gear 707 is arranged on one side of the rotating shaft 704 inside the rotating groove 711. A pushing groove 714 is provided at the top of the movable groove 711, the rack 708 is arranged inside the pushing groove 714 and meshes with the gear 707, one end of the second elastic member 709 abuts against the rack 708, and the other end of the second elastic member 709 abuts against the side of the pushing groove 714, the pushing piston 710 is arranged on the side of the rack 708 away from the second elastic member 709, and is slidingly connected to the inner wall of the pushing groove 714, and an air injection port 712 is provided on the side of the movable piston 606, and the air injection port 712 is arranged between the pushing piston 710 and the side of the pushing groove 714, and the air injection port 712 is connected to the air supply source 603 through the air injection hose 713.

[0052] When the cleaning nozzle 601 needs to be used, the operator can inject gas into the gas injection port 712 through the gas injection hose 713. After the gas enters the push groove 714, due to the continuous gas supply from the gas supply source 603, the gas will gradually push the piston 710 to move. After pushing the piston 710, the rack 708 will move in the direction of compressing the second elastic member 709, the rack 708 drives the gear 707 to rotate, and the gear 707 drives the rotating shaft 704 to rotate clockwise, thereby driving each first connecting rod 705 to rotate clockwise. Since the slide groove 701 limits the freedom of the baffle 702, the second connecting rod 706 will move downward under the action of the first connecting rod 705, thereby opening the jet slot 7 (it should be noted that the rack 708 does not need to drive the gear 707 to rotate multiple times, only a quarter of a turn is required. At the same time, the gas supply hose 604 and the gas injection hose 713 should be reserved with sufficient length to ensure that the telescopic drive can push the piston 710 to move smoothly inside the detection box 502).

[0053] In addition, in order to prevent the second elastic member 709 from being over-compressed, a limiting rod 715 may be provided on a side of the rack 708 close to the second elastic member 709 , and the specific length of the limiting rod 715 may be adjusted according to actual needs.

[0054] When the jet slot 7 needs to be closed, the operator stops injecting air into the air injection hose 713, and the second elastic member 709 recovers its deformation, pushing the rack 708 to drive the gear 707 to rotate counterclockwise, thereby driving the rotating shaft 704 to rotate counterclockwise. The rotating shaft 704 drives the baffle 702 back to its original position through the first connecting rod 705 and the second connecting rod 706, thereby closing the jet slot 7.

[0055] In addition, if necessary, a vent pipe can be provided at the connection between the gas injection hose 713 and the outside of the detection box 502, and a stop valve can be installed above it. When the baffle 702 needs to be closed, the operator can open the stop valve to discharge the gas in the gas injection hose 713, thereby helping the second elastic member 709 to restore its deformation.

[0056] Embodiment 4:

[0057] Based on Example 3, refer to Fig.13 In this embodiment, an overflow valve 716 is provided on the gas injection hose 713, and one end of the gas supply hose 604 is connected to the overflow port of the overflow valve 716. When the push piston 710 inside the push groove 714 cannot continue to move under the action of the limit rod 715, the gas supply source 603 continues to supply gas to the push groove 714, and the gas pressure inside the push groove 714 will gradually increase. When the gas pressure reaches the set value, the overflow port of the overflow valve 716 will automatically open, and the gas will enter the gas supply hose 604 through the overflow port, and then be guided to each cleaning nozzle 601 by the gas diverter 602.

[0058] By providing the overflow valve 716, the opening of the jet slot 7 and the ejection of the high-pressure airflow from the cleaning nozzle 601 can be achieved in a sequential order, thereby simplifying the system design, reducing the overall complexity and improving practicality.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-well metering device, characterized in that: The invention comprises a well selection switching mechanism, a metering mechanism, a liquid discharge pipe (108), and a microwave detection mechanism for detecting the water content of crude oil. The well selection switching mechanism comprises a plurality of single-well oil pipes (1) connected to wells, a distribution cylinder (101) connected to the plurality of single-well oil pipes (1), and a valve seat (102) arranged inside the distribution cylinder (101) and fixedly connected to the distribution cylinder (101). The valve seat (102) is provided with a plurality of circumferentially arranged flow ports (103), and the interior of each single-well oil pipe (1) is respectively connected to the interior of the corresponding flow port (103). The interior of the distribution cylinder (101) is rotatably connected to the flow port (103). ) is connected to the inside of the metering mechanism, and the side of the well selection pipe (104) is in contact with the side of the valve seat (102); one side of the well selection pipe (104) is connected to a rotating motor (105), and the rotating motor (105) is fixed to the side of the distribution cylinder (101); the other side of the well selection pipe (104) is connected to an oil pipeline (106), and one side of the oil pipeline (106) passes through the valve seat (102) and the side of the distribution cylinder (101) and is connected to the inside of the metering mechanism; the metering mechanism is connected to the liquid discharge pipe (108) via a liquid outlet pipe (107), and the microwave detection mechanism is arranged on the liquid outlet pipe (107).

2. A multi-well metering device according to claim 1, characterized in that: The metering mechanism comprises a cyclone separator (2) connected to the inside of a well selection pipe (104) via an oil pipeline (106), a metering tank (201) connected to the cyclone separator (2), a gas flow meter (202) and a liquid flow meter (203); the liquid outlet pipe (107) is arranged at the bottom of the metering tank (201) and is connected to the inside of the metering tank (201); the other end of the liquid outlet pipe (107) is connected to the inside of a liquid discharge pipe (108); the liquid flow meter (203) is arranged on the liquid outlet pipe (107); the top of the metering tank (201) is connected to a gas phase pipe (204); the gas phase pipe (204) is connected to the inside of the liquid discharge pipe (108); and the gas flow meter (202) is arranged on the gas phase pipe (204).

3. A multi-well metering device according to claim 1, characterized in that: A sewage chamber (3) is provided on a side of the distribution cylinder (101) away from the rotating motor (105); a first sewage pipe (301) is provided on one side of each of the single-well oil pipes (1); a side of the first sewage pipe (301) away from the single-well oil pipe (1) is connected to the inside of the sewage chamber (3); a second sewage pipe (302) is provided at the bottom of the sewage chamber (3); a manifold (303) is connected to the bottom of the second sewage pipe (302); and a first stop valve (304) is provided on the single-well oil pipe (1), the first sewage pipe (301), and the second sewage pipe (302).

4. A multi-well metering device according to claim 1, characterized in that: A plurality of annular sealing grooves (4) are provided on a side of the valve seat (102) close to the well-swinging pipe, and each annular sealing groove (4) is respectively arranged on one side of the circulation port (103); a first elastic member (401) is provided inside the annular sealing groove (4); one end of the first elastic member (401) is in contact with the side of the annular sealing groove (4); the other end of the first elastic member (401) is connected to an annular sealing block (402); and a first annular inclined surface (403) is provided on an outer surface of the annular sealing block (402) outside the annular sealing groove (4); an annular clamping groove (406) is provided on a side of the well-selecting pipe (104) close to the circulation port (103); the annular sealing block (402) is clamped with the annular clamping groove (406); a second annular inclined surface (404) is provided on one side of the annular clamping groove (406) and is slidably connected to the first annular inclined surface (403); and the side surface of the well-selecting pipe (104) is in an arc-shaped structure.

5. A multi-well metering device according to claim 2, characterized in that: The microwave detection mechanism comprises a sampling tube (5), second stop valves (501) arranged on both sides of the sampling tube (5), a detection box (502), a microwave water detector (503), and a sampling pump (504); one end of the sampling tube (5) is in communication with a liquid outlet tube (107), and the other end of the sampling tube (5) is also in communication with the interior of the liquid outlet tube (107); the detection box (502) is arranged on the sampling tube (5) and between the two second stop valves (501), and the sampling tube (5) is in communication with the interior of the detection box (502); the microwave water detector (503) is arranged on the side of the detection box (502), and the sampling pump (504) is arranged to be connected to the sampling tube (5).

6. A multi-well metering device according to claim 5, characterized in that: A cleaning mechanism is provided inside the detection box (502), the cleaning mechanism comprising a cleaning piston (6), a plurality of cleaning nozzles (601) arranged on the cleaning piston (6), a gas diverter (602) for connecting the cleaning nozzles (601), and a gas supply source (603); the cleaning piston (6) is arranged inside the detection box (502) and is slidably connected to the inner wall of the detection box (502); the gas diverter (602) is arranged on a side of the cleaning piston (6) away from the cleaning nozzles (601), and the gas diverter (602) is connected to the gas supply source (603) via a gas supply hose (604); and a third sewage discharge pipe (605) is provided on a side of the detection box (502) away from the cleaning piston (6).

7. A multi-well metering device according to claim 6, characterized in that: The side of the cleaning piston (6) away from the cleaning nozzle (601) is connected to a movable piston (606) via a plurality of connecting columns (607); a telescopic drive mechanism (608) is fixedly connected to the side of the detection box (502); and a telescopic rod of the telescopic drive mechanism (608) is connected to the movable piston (606); and a plurality of jetting grooves (7) are provided on the side of the cleaning piston (6) away from the gas diverter (602); and each jetting groove (7) is circumferentially centered around the center of the cleaning piston (6). The cleaning nozzles (601) are arranged in a direction, each of the cleaning nozzles (601) is arranged inside the jet groove (7), a slide groove (701) is provided on one side of each of the jet grooves (7), and the slide groove (701) is connected to the inside of the jet groove (7), a baffle (702) for shielding the jet groove (7) is slidably connected inside the slide groove (701), a receiving space (703) is provided inside the cleaning piston (6), and a connecting rod mechanism for separating each baffle (702) from the jet groove (7) is provided inside the receiving space (703).

8. A multi-well metering device according to claim 7, characterized in that: The connecting rod mechanism comprises a rotating shaft (704) rotatably connected to the interior of the accommodating space (703), a plurality of first connecting rods (705) fixedly connected to the rotating shaft (704), second connecting rods (706) respectively rotatable with the first connecting rods (705), gears (707), racks (708), second elastic members (709), and a pushing piston (710), wherein one end of each second connecting rod (706) away from the first connecting rod (705) is respectively rotatably connected to the baffle (702), a rotating groove (711) is provided inside the movable piston (606), one end of the rotating shaft (704) extends into the interior of the rotating groove (711), the gear (707) is arranged on one side of the rotating shaft (704) inside the rotating groove (711), and the rotating groove ( A pushing groove (714) is provided on the top of the movable piston (606), the rack (708) is arranged inside the pushing groove (714) and meshes with the gear (707), one end of the second elastic member (709) abuts against the rack (708), and the other end of the second elastic member (709) abuts against the side of the pushing groove (714), the pushing piston (710) is arranged on the side of the rack (708) away from the second elastic member (709), and is slidably connected to the inner wall of the pushing groove (714), and an air injection port (712) is provided on the side of the movable piston (606), and the air injection port (712) is arranged between the pushing piston (710) and the side of the pushing groove (714), and the air injection port (712) is connected to the air supply source (603) through an air injection hose (713).

9. A multi-well metering device according to claim 8, characterized in that: The gas injection hose (713) is provided with an overflow valve (716), and one end of the gas supply hose (604) is connected to the overflow port of the overflow valve (716).

Images