A multi-well metering device

Abstract

The present invention relates to the technical field of metering devices, and proposes a multi-well metering device, comprising a well selection switching mechanism, a metering mechanism, a liquid discharge pipe, 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 connected to wells, a distribution cylinder connected to the plurality of single-well oil pipes, and 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. A well selection pipe connected to the interior of the flow port is rotatably connected inside the distribution cylinder, and the side surface of the well selection pipe conflicts with the side surface of the valve seat. A rotating motor is connected to one side of the well selection pipe, 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. Through the above technical scheme, the problem that the metering device in the related technology can only measure a single well and the problem that the staff needs to run to multiple directions for sampling when detecting the water content are solved.

Description

Technical Field

[0001] This invention relates to the field of metering device technology, specifically to a multi-well metering device. Background Technology

[0002] Intelligent metering devices play a crucial role in oilfield development and management, primarily used for the precise measurement and intelligent control of parameters such as oil well production and water cut. By combining advanced automation, computer, and sensor technologies, they improve metering accuracy, automation levels, and data processing capabilities, effectively reducing manual labor intensity and error rates.

[0003] Existing metering devices typically only measure production from a single oil well. If multiple wells need to be monitored, multiple metering devices must be installed, resulting in larger, more complex equipment that increases maintenance and installation difficulty. Furthermore, when workers need to measure the water content of crude oil from multiple wells, traditional methods require manual sampling from the pipeline at each well. If the wells and pipelines are widely distributed, personnel must travel to multiple locations to collect samples, significantly reducing efficiency and increasing labor intensity. Summary of the Invention

[0004] This invention proposes a multi-well metering device, which solves the problem that metering devices in related technologies can only measure a single well, and the problem that when detecting water content, workers need to run in multiple directions to collect samples.

[0005] The technical solution of the present invention is as follows: A multi-well metering device includes a well selection switching mechanism, a metering mechanism, a drain pipe, and a microwave detection mechanism for detecting the water content of crude oil. The well selection switching mechanism includes several single-well tubings connected to wells, a distribution cylinder connected to several single-well tubings, and a valve seat disposed inside the distribution cylinder and fixedly connected to the distribution cylinder. The valve seat is provided with several circumferentially arranged flow ports, and the interior of each single-well tubing is respectively connected to the interior of the corresponding flow port. A well selection pipe connected to the interior of the distribution cylinder and communicating with the interior of the flow port is rotatably connected inside the distribution cylinder, and the side of the well selection pipe abuts against the side of the valve seat. A rotary motor is connected to one side of the well selection pipe and the rotary motor is fixed to the side of the distribution cylinder. An oil pipeline is connected to the other side of the well selection pipe, and one side of the oil pipeline passes through the valve seat, the side of the distribution cylinder, and communicates with the interior of the metering mechanism. The metering mechanism is connected to the drain pipe through an outlet pipe, and the microwave detection mechanism is disposed on the outlet pipe.

[0006] The microwave detection mechanism includes a sampling tube, second shut-off valves on both sides of the sampling tube, a detection box, a microwave water analyzer, and a sampling pump. One end of the sampling tube is connected to the outlet pipe, and the other end of the sampling tube is also connected to the inside of the outlet pipe. The detection box is set on the sampling tube and located between the two second shut-off valves, and the sampling tube is connected to the inside of the detection box. The microwave water analyzer is set on the side of the detection box, and the sampling pump is connected to the sampling tube.

[0007] The testing chamber is equipped with a cleaning mechanism, which includes a cleaning piston, several cleaning nozzles mounted on the cleaning piston, a gas distributor for connecting each cleaning nozzle, and a gas supply source. The cleaning piston is located inside the testing chamber and is slidably connected to the inner wall of the testing chamber. The gas distributor is located on the side of the cleaning piston away from the cleaning nozzles, and the gas distributor is connected to the gas supply source through a gas supply hose.

[0008] The cleaning piston is provided with several jet grooves on the side away from the gas distributor, and each jet groove is arranged circumferentially with the center of the cleaning piston as the center. Each cleaning nozzle is arranged inside the jet groove. Each jet groove is provided with a sliding groove on one side, and the sliding groove is connected to the inside of the jet groove. A baffle for blocking the jet groove is slidably connected inside the sliding groove. The cleaning piston is provided with a receiving space, and a linkage mechanism for disengaging each baffle from the jet groove is provided inside the receiving space.

[0009] The linkage mechanism includes a rotating shaft rotatably connected to the interior of the accommodating space, several first connecting rods fixedly connected to the rotating shaft, second connecting rods rotatably connected to the first connecting rods, a gear, a rack, a second elastic element, and a pushing piston. The ends of each second connecting rod away from the first connecting rod are rotatably connected to a baffle. The moving piston has a rotating groove inside. One end of the rotating shaft extends into the rotating groove. The gear is located on one side of the rotating shaft inside the rotating groove. A pushing groove is located at the top of the rotating groove. The rack is located inside the pushing groove and meshes with the gear. One end of the second elastic element abuts against the rack, and the other end abuts against the side of the pushing groove. The pushing piston is located on the side of the rack away from the second elastic element and is slidably connected to the inner wall of the pushing groove. An air injection port is located on the side of the moving piston, between the pushing piston and the side of the pushing groove. The air injection port is connected to an air supply source via an air injection hose.

[0010] Furthermore, the metering mechanism includes a cyclone separator connected to the well selection pipe via an oil pipeline, a metering tank connected to the cyclone separator, a gas flow meter, and a liquid flow meter. The liquid outlet pipe is located 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 drain pipe. The liquid flow meter is located on the liquid outlet pipe. A gas phase pipe is connected to the top of the metering tank and is connected to the inside of the drain pipe. The gas flow meter is located on the gas phase pipe.

[0011] Furthermore, a drain chamber is provided on the side of the distribution cylinder away from the rotating motor, and a first drain pipe is provided on one side of each of the single well oil pipes. The side of the first drain pipe away from the single well oil pipe is connected to the inside of the drain chamber. A second drain pipe is provided at the bottom of the drain chamber, and a manifold is connected to the bottom of the second drain pipe. A first shut-off valve is provided on each of the single well oil pipes, the first drain pipe, and the second drain pipe.

[0012] Furthermore, the valve seat is provided with several annular sealing grooves on the side near the well pipe, and each annular sealing groove is respectively located on one side of the flow port. A first elastic element is provided inside the annular sealing groove. One end of the first elastic element abuts against the side of the annular sealing groove, and the other end of the first elastic element is connected to an annular sealing block. The annular sealing block has a first annular inclined surface on one side of its outer surface outside the annular sealing groove. The well pipe is provided with an annular groove on the side near the flow port, and the annular sealing block is engaged with the annular groove. A second annular inclined surface is provided on one side of the annular groove and is slidably connected to the first annular inclined surface. The side of the well pipe has an arc-shaped structure.

[0013] Furthermore, a third drain pipe is provided on the side of the detection box away from the cleaning piston.

[0014] Furthermore, a movable piston is connected to the side of the cleaning piston away from the cleaning nozzle via several connecting columns, and a telescopic drive mechanism is fixedly connected to the side of the detection box, with the telescopic rod of the telescopic drive mechanism connected to the movable piston.

[0015] Furthermore, the gas injection hose is equipped with an overflow valve, and one end of the gas supply hose is connected to the overflow port of the overflow valve.

[0016] The working principle and beneficial effects of this invention are as follows:

[0017] During operation, operators can connect the oil delivery pipes of multiple individual wells to the individual well tubing. When metering a specific well is required, the operator starts a rotary motor, which rotates the well selection pipe and connects it to the corresponding flow port. Crude oil from the individual well tubing then enters the well selection pipe through the flow port, and subsequently flows through the oil delivery pipe into the metering mechanism for measurement. After measurement, the crude oil flows through the outlet pipe into the discharge pipe. To meter another well, the operator similarly starts the rotary motor and connects the well selection pipe to the corresponding flow port, thus solving the problem that traditional metering devices can only measure a single well. Furthermore, this device uses only one metering mechanism to meter multiple wells, has a small footprint, and is easy to install and maintain.

[0018] Secondly, when operators need to test the water content of crude oil in a single well, they can start the rotary motor to move the well selection pipe to the corresponding flow port. At this time, the crude oil will flow sequentially through the well selection pipe, the oil delivery pipeline, and the metering mechanism to the outlet pipe, allowing operators to test the water content of the crude oil using the microwave detection mechanism. When testing another well, the operator similarly starts the rotary motor to connect the well selection pipe to the corresponding flow port. Because the testing location remains constant, operators do not need to travel between multiple testing points, thus reducing workload and improving efficiency.

[0019] Furthermore, microwave testing facilities can typically complete measurements in a very short time. Compared to traditional manual sampling and chemical analysis methods, microwave testing eliminates the need to wait for laboratory results or manual processing, providing real-time water content data and further improving work efficiency. Microwave technology can also enable continuous online monitoring, reflecting the water content of crude oil in oil wells or pipelines in real time. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a connection diagram for Embodiment 1;

[0022] Figure 2 This is a schematic diagram of the distribution tube and single-well tubing structure in Example 1;

[0023] Figure 3 for Figure 2 Schematic diagram of a partial cross-section of the structure;

[0024] Figure 4 This is an exploded view of the selected well casing, the first elastic element, and the annular sealing block in Example 2;

[0025] Figure 5 A partial cross-sectional view of the distribution cylinder in Example 2;

[0026] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0027] Figure 7 This is a schematic diagram of the cleaning structure in Example 3;

[0028] Figure 8 This is a partial cross-sectional view of the detection box in Example 3;

[0029] Figure 9 This is a partial cross-sectional view of the cleaning piston in Example 3;

[0030] Figure 10 This is a cross-sectional view of the cleaning piston in Example 3;

[0031] Figure 11 This is a schematic diagram of the structure of the air supply source, air supply hose, moving piston, and cleaning piston in Example 3;

[0032] Figure 12 for Figure 11 Enlarged view of point B in the middle;

[0033] Figure 13 This is a schematic diagram showing the connection of the gas supply source, gas supply hose, moving piston, cleaning piston, overflow valve, gas distributor, and gas supply hose in Embodiment 3 or Embodiment 4.

[0034] In the diagram: 1. Single-well tubing; 101. Distribution cylinder; 102. Valve seat; 103. Flow port; 104. Well selection pipe; 105. Rotary motor; 106. Oil delivery 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 shut-off valve; 4. Annular sealing groove; 401. First elastic element; 402. Annular sealing block; 403. First annular inclined surface; 404. Second annular inclined surface; 405. Sealing gasket; 406. Annular groove; 5. Sampling pipe; 501. Second shut-off valve. 502. Valve; 503. Detection box; 504. Microwave water analyzer; 505. Sampling pump; 6. Cleaning piston; 601. Cleaning nozzle; 602. Gas distributor; 603. Gas supply source; 604. Gas supply hose; 605. Third drain pipe; 606. Moving piston; 607. Connecting column; 608. Telescopic drive mechanism; 7. Air jet channel; 701. Slide groove; 702. Baffle; 703. Accommodation space; 704. Rotating shaft; 705. First connecting rod; 706. Second connecting rod; 707. Gear; 708. Rack; 709. Second elastic element; 710. Push piston; 711. Rotating groove; 712. Air injection port; 713. Air injection hose; 714. Push groove; 715. Limiting rod; 716. Overflow valve. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] refer to Figure 1-3A multi-well metering device includes a well selection switching mechanism, a metering mechanism, a drain pipe 108, and a microwave detection mechanism for detecting the water content of crude oil. The well selection switching mechanism includes several single-well tubing 1 connected to wells, a distribution cylinder 101 connecting the several single-well tubing 1, and a valve seat 102 disposed inside the distribution cylinder 101 and fixedly connected to the distribution cylinder 101. The valve seat 102 is provided with several circumferentially arranged flow ports 103, and the interior of each single-well tubing 1 is respectively connected to the interior of the corresponding flow port 103. The distribution cylinder 101 is rotatably connected to the interior of the flow port 103. The well selection pipe 104 is connected to the valve seat 102, and the side of the well selection pipe 104 abuts against the side of the valve seat 102. A rotary motor 105 is connected to one side of the well selection pipe 104, and the rotary motor 105 is fixed to the side of the distribution cylinder 101. The output end of the rotary motor 105 is connected to the well selection pipe 104. An oil delivery pipe 106 is connected to the other side of the well selection pipe 104, and one side of the oil delivery pipe 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 discharge pipe 108 through the outlet pipe 107. A microwave detection mechanism is set on the outlet pipe 107.

[0038] Specifically, the metering mechanism includes a cyclone separator 2 connected to the 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 located 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 the drain pipe 108. The liquid flow meter 203 is located on the liquid outlet pipe 107. A gas phase pipe 204 is connected to the top of the metering tank 201 and is connected to the inside of the drain pipe 108. The gas flow meter 202 is located on the gas phase pipe 204.

[0039] First, crude oil undergoes gas-liquid separation in a cyclone separator 2. The multiphase flows of different flow regimes are brought together to form laminar flow for thorough separation. Due to the swirling effect, a swirling field is formed inside the cyclone separator 2 under the combined action of centrifugal force, gravity, and buoyancy. The denser liquid phase flows along the pipe wall to the bottom of the separation unit, while the less dense gas phase rises along the center of the swirling field to the top of the cyclone separator 2, achieving gas-liquid two-phase separation. The separated gas and liquid phases are then discharged through the gas phase pipe 204 and the liquid outlet pipe 107, respectively, and measured separately by the gas flow meter 202 and the liquid flow meter 203, thus obtaining various data for the crude oil in a single well. The flow characteristics and physical properties of the gas and liquid phases differ significantly, and mixing them may cause measurement errors in flow meters or other measuring instruments. Separate measurement reduces measurement errors caused by bubbles or gas, improving the accuracy of the equipment.

[0040] In addition, a fourth drain pipe can be installed 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 when switching to the next oil well after the crude oil testing of one oil well is completed, the residual fluid in the cyclone separator 2 and the metering tank 201 can be completely discharged, thereby reducing the impact of residual fluid on the testing accuracy of the next oil well.

[0041] Because oil wells may accumulate impurities such as sand, minerals, wastewater, and sludge during the long-term settling process, a portion of the crude oil is usually discharged during measurement to ensure more accurate and representative measurement or testing results.

[0042] To achieve the above objectives, in this embodiment, a drain chamber 3 is provided on the side of the distribution cylinder 101 away from the rotary motor 105. A first drain pipe 301 is provided on one side of each single well oil pipe 1. The side of the first drain pipe 301 away from the single well oil pipe 1 is connected to the inside of the drain chamber 3. A second drain pipe 302 is provided at the bottom of the drain chamber 3. A manifold 303 is connected to the bottom of the second drain pipe 302. A first shut-off valve 304 is provided on the single well oil pipe 1, the first drain pipe 301, and the second drain pipe 302.

[0043] When single-well crude oil needs to be metered, the operator first opens the shut-off valve on the first drain pipe 301, allowing some crude oil to enter the drain chamber 3 through the first drain pipe 301, and then drain into the manifold 303 through the second drain pipe 302 at the bottom of the drain chamber 3. This draining process improves the metering accuracy of the crude oil measurement device. After a period of drainage, the operator closes the shut-off valve on the first drain pipe 301 and opens the shut-off valve on the single-well tubing 1 to begin crude oil metering. (It is worth noting that the shut-off valves on single-well tubing 1, the first drain pipe 301, and the second drain pipe 302 can all be replaced with electric valves.)

[0044] Furthermore, the microwave detection mechanism includes a sampling tube 5, second shut-off valves 501 disposed on both sides of the sampling tube 5, a detection box 502, a microwave water content analyzer 503, and a sampling pump 504. One end of the sampling tube 5 is connected to the outlet pipe 107, and the other end of the sampling tube 5 is also connected to the interior of the outlet pipe 107. The detection box 502 is disposed on the sampling tube 5 and located between the two second shut-off valves 501, and the sampling tube 5 is connected to the interior of the detection box 502. The microwave water content analyzer 503 is disposed on the side of the detection box 502 and fixedly connected to the detection box. The sampling pump 504 is connected to the sampling tube 5. In this embodiment, the microwave water content analyzer 503 detects water content by utilizing the propagation characteristics of microwave signals in crude oil samples. When microwave signals pass through crude oil, water molecules and oil molecules have different absorption and scattering characteristics of microwaves, with water molecules absorbing microwave signals more strongly. Therefore, the instrument determines the proportion of water in the 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 terminal, which can transmit the data measured by the microwave water meter 503 to the control terminal in real time, so that the staff can view it.

[0045] Since gases or bubbles in crude oil can affect the propagation speed and reflection signal of microwaves, leading to deviations in measurement results, this embodiment sets the microwave detection mechanism on the outlet pipe 107 of the cyclone separator 2. This allows the cyclone separator 2 to effectively separate gas components in crude oil, reduce the interference of bubbles on microwave measurement, and thus improve the accuracy of water content measurement.

[0046] When the operator needs to perform testing, they can open the second shut-off valve 501 (which can also be an electric valve) near the metering tank 201, and then start the sampling pump 504 to draw the crude oil from the outlet pipe 107 into the testing chamber 502. Next, the second shut-off valve 501 is closed, and the microwave water content analyzer 503 is started. The microwave water content analyzer 503 will detect the water content of the stationary crude oil in the testing chamber 502. The test results can be transmitted in real time to the operator's control terminal or displayed on the screen of the microwave water content analyzer 503 for easy viewing.

[0047] After the test is completed, the operator can open the second shut-off valve 501 again and start the sampling pump 504 to return the crude oil in the test box 502 to the outlet pipe 107, reducing crude oil waste.

[0048] Furthermore, the microwave detection mechanism in this embodiment replaces the traditional manual sampling process, significantly reducing the workload and labor intensity of staff. Simultaneously, operators can adjust the detection frequency according to actual needs, further improving the representativeness of the detection results.

[0049] Working principle:

[0050] During operation, operators can connect the oil pipelines of multiple single wells to the single-well tubing 1, and simultaneously close the first shut-off valve 304 on each single-well tubing 1. When metering a specific single well is required, the rotary motor 105 is first started, which drives the well selection pipe 104 to rotate and connects it to the corresponding flow port 103. Then, the first shut-off valve 304 on the corresponding single-well tubing 1 is opened. At this time, the crude oil in the single-well tubing 1 enters the well selection pipe 104 through the flow port 103. The crude oil then enters the cyclone separator 2 through the oil pipeline 106. Under the action of the cyclone separator 2, the crude oil is separated into gas and liquid. The separated gas and liquid phases are then 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, thereby obtaining various data of the crude oil in the single well.

[0051] After metering is completed, the crude oil enters the discharge pipe 108 through the outlet pipe 107. Similarly, when metering another single well is required, the operator starts the rotary motor 105 and connects the well selection pipe 104 to the corresponding flow port 103, thus solving the problem that traditional metering devices can only measure a single well. Furthermore, this device can meter multiple wells using only one metering mechanism, has a small footprint, and is easy to install and maintain.

[0052] Furthermore, when operators need to test the water content of crude oil in a single well, they can activate the rotary motor 105 to move the well selection pipe 104 to the corresponding flow port 103. At this time, the crude oil will flow sequentially through the well selection pipe 104, the oil pipeline 106, the hydrocyclone separator 2, and the metering tank 201 to the outlet pipe 107, allowing operators to test the water content of the crude oil using a microwave detection mechanism. When testing another well, the operator similarly activates the rotary motor 105 to connect the well selection pipe 104 to the corresponding flow port 103. Because the testing location remains constant, operators do not need to travel between multiple testing points, thus reducing workload and improving efficiency.

[0053] During testing, the second shut-off valve 501 near the metering tank 201 is opened, and then the sampling pump 504 is started to draw crude oil from the outlet pipe 107 into the testing chamber 502. Next, the second shut-off valve 501 is closed, and the microwave water content analyzer 503 is started. The microwave water content analyzer 503 will detect the water content of the stationary crude oil in the testing chamber 502. The test results can be transmitted in real time to the operator's control terminal or displayed on the screen of the microwave water content analyzer 503 for easy viewing.

[0054] Example 2:

[0055] Based on Example 1, and referring to Figure 4-6In this embodiment, to improve the sealing performance between the well selection tube 104 and the valve seat 102, several annular sealing grooves 4 are provided on the side of the valve seat 102 near the well tube, and each annular sealing groove 4 is respectively provided on one side of the flow port 103. A first elastic element 401 is provided inside the annular sealing groove 4. One end of the first elastic element 401 abuts against the side of the annular sealing groove 4, and the other end of the first elastic element 401 is connected to an annular sealing block 402. The annular sealing block 402 has a first annular inclined surface 403 on one side of the outer surface of the annular sealing groove 4. An annular groove 406 is provided on the side of the well selection tube 104 near the flow port 103, and the annular sealing block 402 is engaged with the annular groove 406. A sealing gasket 405 is provided at the bottom of the annular groove 406. A second annular inclined surface 404 is provided on one side of the annular groove 406 and is slidably connected to the first annular inclined surface 403. The side of the well selection tube 104 has an arc-shaped structure.

[0056] When the well casing 104 rotates under the drive of the rotary motor 105, one side of the well casing 104 has an arc-shaped structure, which compresses the annular sealing block 402. Due to the first annular inclined surface 403, the well casing 104 gradually presses the annular sealing block 402 into the sealing groove and compresses the first elastic element 401. When the well casing 104 is fully aligned with the flow port 103, the first elastic element 401 returns to its original shape, pushing the annular sealing block 402 into the annular groove 406 and into contact with the sealing gasket 405. Under the action of the first elastic element 401, the sealing block always maintains contact with the sealing gasket 405, thereby improving the sealing performance between the well casing 104 and the valve seat 102 surface, reducing the possibility of crude oil leakage through the gap between the well casing 104 and the valve seat 102 surface, and ensuring the accuracy of metering.

[0057] When a single well needs to be replaced, first close the first shut-off valve 304 on the corresponding single well tubing 1, then start the rotary motor 105 to rotate the well selection tubing 104. Under the action of the second annular inclined surface 404 on the well selection tubing 104, the annular locking block will gradually disengage from the annular locking groove 406. The switching can be completed simply by the rotary motor 105 overcoming the elastic force of the first elastic element 401.

[0058] Example 3:

[0059] Based on this first embodiment, with reference to Figure 7-13In this embodiment, to improve the detection accuracy of crude oil water content, a cleaning mechanism is provided inside the detection chamber 502. The cleaning mechanism includes a cleaning piston 6, several cleaning nozzles 601 disposed on the cleaning piston 6, a gas distributor 602 for connecting each cleaning nozzle 601, and a gas supply source 603. The cleaning piston 6 is disposed inside the detection chamber 502 and is slidably connected to the inner wall of the detection chamber 502. The gas distributor 602 is disposed on the side of the cleaning piston 6 away from the cleaning nozzles 601, and the gas distributor 602 is connected to the gas supply source 603 through a gas supply hose 604. A third drain pipe 605 is provided on the side of the detection chamber 502 away from the cleaning piston 6. The third drain pipe 605 communicates with the inside of the detection chamber 502, and an electric valve is also provided on the third drain pipe 605 to control the opening and closing of the third drain pipe 605.

[0060] After the microwave testing mechanism completes a single-well test, before proceeding to the next single-well test, the operator can supply air to the cleaning nozzle 601. The high-pressure airflow from the cleaning nozzle 601 will remove any residual crude oil and discharge it into the testing chamber 502 through the third drain pipe 605 (it should be noted that when using the cleaning mechanism, the second shut-off valves 501 at both ends of the sampling pipe 5 are in the closed state). This ensures more accurate detection of the crude oil water content in the next single well and improves the reliability of the data.

[0061] Furthermore, the high-pressure cleaning nozzle 601 can efficiently remove large amounts of viscous crude oil in a short time, thereby improving testing efficiency. Compared with traditional mechanical cleaning methods (such as scrapers, brushes, etc.), the high-pressure nozzle cleans by the impact force of airflow, avoiding friction on the inside of the testing chamber 502, reducing the risk of surface damage and corrosion, and thus extending the service life of the testing chamber 502.

[0062] Furthermore, a movable piston 606 is connected to the side of the cleaning piston 6 away from the cleaning nozzle 601 via several connecting posts 607. A telescopic drive mechanism 608 is fixedly connected to the side of the detection box 502, and the telescopic rod of the telescopic drive mechanism 608 is connected to the movable piston 606. The telescopic drive mechanism 608 can be a cylinder or a hydraulic cylinder, and this embodiment does not impose any restrictions on it.

[0063] By setting up a telescopic drive mechanism 608, the moving piston 606 can drive the cleaning nozzle 601 to move inside the cleaning tank, thereby expanding the cleaning range and ensuring that the crude oil in the tank can be completely discharged.

[0064] Because crude oil may contain solid impurities, these impurities may accumulate in the nozzles or other small channels of the cleaning nozzle 601 when they enter the detection chamber 502, causing nozzle blockage. Blockage can reduce the nozzle's spray flow, affecting cleaning effectiveness and the normal operation of the equipment. Furthermore, solid impurities may cause friction and wear on the nozzle surface during crude oil flow, especially hard impurities (such as sand and mineral particles), which, over time, will accelerate wear and reduce service life.

[0065] To reduce the occurrence of this situation, a number of jet grooves 7 are provided on the side of the cleaning piston 6 away from the gas distributor 602, and each jet groove 7 is arranged circumferentially with the center of the cleaning piston 6 as the center. Each cleaning nozzle 601 is arranged inside the jet groove 7. Each side of the jet groove 7 is provided with a sliding groove 701, and the sliding 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 sliding groove 701. The cleaning piston 6 is provided with a receiving space 703. The receiving space 703 is provided with a linkage mechanism that disengages each baffle 702 from the jet groove 7.

[0066] By using the jet groove 7 and baffle 702, a physical barrier can be formed on the surface of the cleaning nozzle 601 to prevent hard impurities in the crude oil from wearing down the cleaning nozzle 601, thereby improving the service life of the cleaning nozzle 601 and ensuring the reliability and stability of the cleaning mechanism under long-term use.

[0067] Specifically, the linkage mechanism includes a rotating shaft 704 rotatably connected to the interior of the accommodating space 703, several first connecting rods 705 fixedly connected to the rotating shaft 704, second connecting rods 706 rotatably connected to the first connecting rods 705, a gear 707, a rack 708, a second elastic element 709, and a pushing piston 710. The end of each second connecting rod 706 away from the first connecting rod 705 is rotatably connected to a baffle 702. The moving piston 606 has a rotating groove 711 inside, and one end of the rotating shaft 704 extends into the rotating groove 711. The gear 707 is located on one side of the rotating shaft 704 inside the rotating groove 711. The top of the moving groove 711 is provided with a pushing groove 714. The rack 708 is disposed 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 disposed 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. The moving piston 606 is provided with an air injection port 712 on its side, and the air injection port 712 is disposed between the pushing piston 710 and the side of the pushing groove 714. The air injection port 712 is connected to the air supply source 603 through an air injection hose 713.

[0068] When the cleaning nozzle 601 is needed, the operator can inject gas into the air inlet 712 through the air injection hose 713. After the gas enters the push groove 714, it will gradually push the push piston 710 to move due to the continuous supply of gas from the air supply source 603. After pushing the piston 710, the rack 708 will move along the direction of compressing the second elastic element 709. The rack 708 drives the gear 707 to rotate, and the gear 707 will then drive the rotating shaft 704 to rotate clockwise, which in turn drives each of the first connecting rods 705 to rotate clockwise. Since the slide 701 restricts the degree of 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 air jet groove 7 (it should be noted that the rack 708 does not need to drive the gear 707 to rotate many times, only a quarter turn is needed. At the same time, the air supply hose 604 and the air 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).

[0069] In addition, to prevent the second elastic element 709 from being over-compressed, a limiting rod 715 can be provided on the side of the rack 708 near the second elastic element 709. The specific length of the limiting rod 715 can be adjusted according to actual needs.

[0070] When it is necessary to close the jet chute 7, the operator stops injecting air into the air injection hose 713. The second elastic element 709 will return to its original shape, pushing the rack 708 to drive the gear 707 to rotate counterclockwise, which in turn drives the rotating shaft 704 to rotate counterclockwise. The rotating shaft 704, through the action of the first connecting rod 705 and the second connecting rod 706, drives the baffle 702 back to its original position, thereby closing the jet chute 7.

[0071] In addition, if necessary, a vent pipe can be installed at the external connection between the gas injection hose 713 and the test box 502, and a shut-off valve can be installed above it. When it is necessary to close the baffle 702, the operator can open the shut-off valve to release the gas in the gas injection hose 713, thereby helping the second elastic element 709 to restore its deformation.

[0072] Example 4:

[0073] Based on Example 3, and referring to Figure 13 In this embodiment, an overflow valve 716 is provided on the air injection hose 713, and one end of the air supply hose 604 is connected to the overflow port of the overflow valve 716. When the push piston 710 inside the push groove 714 can no longer move under the action of the limit rod 715, the air pressure inside the push groove 714 will gradually increase because the air supply source 603 continues to supply air to the push groove 714. When the air pressure reaches the set value, the overflow port of the overflow valve 716 will automatically open, and the gas will enter the air supply hose 604 through the overflow port, and then be guided to each cleaning nozzle 601 by the gas distributor 602.

[0074] By setting the overflow valve 716, the order in which the jet slot 7 opens and the high-pressure airflow is ejected from the cleaning nozzle 601 can be controlled, thereby simplifying the system design, reducing the overall complexity, and improving practicality.

[0075] The above are merely 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 within 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 conflict 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), 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 the liquid outlet pipe (107), and the microwave detection mechanism is arranged on the liquid outlet pipe (107); 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 the liquid outlet tube (107); 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); 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); 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); A plurality of jet grooves (7) are provided on a side of the cleaning piston (6) 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, 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 shielding 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 for separating each baffle (702) from the jet groove (7) is provided inside the accommodating space (703); 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 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 at the top of (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 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).

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 1, characterized in that: A third sewage discharge pipe (605) is provided on a side of the detection box (502) away from the cleaning piston (6).

6. A multi-well metering device according to claim 1, 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 driving mechanism (608) is fixedly connected to the side of the detection box (502); and a telescopic rod of the telescopic driving mechanism (608) is connected to the movable piston (606).

7. A multi-well metering device according to claim 1, 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).

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