An oilfield production wellhead production flow metering device

Abstract

The application discloses an oilfield production wellhead liquid production metering device, and belongs to the oilfield production field. The device comprises a filter kettle, a filter box is fixedly connected below the filter kettle, a conveying pipe is fixedly connected to the right side of the filter kettle, a tank body is fixedly connected to the outer surface of the conveying pipe, a rotating shaft is penetrated through the conveying pipe and is in sliding connection with the conveying pipe, the rotating shaft is penetrated through the upper side of the tank body and is in rotary connection with the tank body, a driving piece is arranged at the lower end of the rotating shaft, a support frame is fixedly connected to the left side of the tank body, and a rotating rod is penetrated through the upper side of the support frame and is in rotary connection with the support frame. The metering piece is arranged in the tank body to measure the liquid production. If the oil viscosity is low when the oil is conveyed from the conveying pipe to the tank body, the driving piece is rapidly rotated by the impact, the centrifugal piece is driven to pull the hydraulic piece, the buffer sheet is moved to the lower end of the conveying pipe, and the buffering effect is achieved to reduce the error caused by the liquid level meter floating due to the waves.

Description

Technical Field

[0001] This application relates to the field of oilfield production, and more specifically, to a metering device for the production volume of oilfield wellheads. Background Technology

[0002] Currently, the main methods used in domestic oilfields for single-well production measurement include dynamometer charting, tipping bucket metering, mass flow meters, and skid-mounted metering vehicles. The dual-volume separator single-well metering process involves collecting and transporting the oil-gas mixture produced from the well to a transfer station. After gas-liquid separation in the upper chamber of the dual-volume separator, the liquid enters the lower chamber. When the liquid level in the lower chamber reaches a certain height, a level relay activates, signaling the solenoid valve and gear pump. The metered oil is then discharged into the pipeline, and a counter counts once. This process is repeated to calculate the single-well production measurement data. Dynamometer charting is... Starting with the dynamometer card, which accurately reflects the operating conditions of the rod pump in the oil pumping system, this study treats the directional well rod pump oil pumping system as a complex three-dimensional vibration system. The mechanical and mathematical models and algorithms of this system are established, and the pump dynamometer card response under different wellhead dynamometer card excitations is calculated. The vector feature method is used to analyze the pump dynamometer card and identify faults, determining the effective stroke of the pump and deriving the effective displacement at the oil well surface. Dual-volume separator metering is a common, mature, and reliable technology for measuring the production of single-well oil. Its advantages include simple operation, accurate measurement, and convenient maintenance.

[0003] Patent document CN113323652B discloses an oilfield wellhead production fluid metering device. This invention discloses an oilfield wellhead production fluid metering device, which relates to the technical field of oilfield production-specific metering devices. It includes a filter kettle for filtering oil, a storage tank for storing oil, a separation tank for oil-gas separation, and a metering tank for measuring oil. The right side of the filter kettle is connected to the left side of the storage tank through a filter pipe.

[0004] The aforementioned application document describes a smooth rise in the liquid level using an arc-shaped elastic pad during metering. However, the viscosity of the extracted oil varies. When the oil viscosity is high, the arc-shaped elastic pad will act as a barrier, reducing the oil extraction rate and making it difficult to buffer the flow based on the oil viscosity. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an oilfield wellhead production fluid metering device, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this application provides an oilfield wellhead production fluid metering device, comprising a filter vessel, a filter box fixedly connected below the filter vessel, a delivery pipe fixedly connected to the right side of the filter vessel, a tank fixedly connected to the outer surface of the delivery pipe, a rotating shaft passing through and slidably connected above the delivery pipe, the rotating shaft passing through and rotatably connected to the upper part of the tank, a driving component provided at the lower end of the rotating shaft, a support frame fixedly connected to the left side of the tank, a rotating rod passing through and rotatably connected above the support frame, a transmission component drivingly connecting the rotating rod and the rotating shaft, a receiving seat fixedly connected to the lower end of the rotating rod, a centrifugal component provided on the outer surface of the receiving seat, a buffer plate provided on the inner surface of the tank, a hydraulic component provided between the buffer plate and the centrifugal component, a baffle plate fixedly connected to the outer surface of the delivery pipe, an adjusting component for accelerating the driving speed mounted above the driving component, a recovery component for secondary filtration and recycling of the filtered material mounted below the filter vessel, and a metering component mounted on the inner surface of the tank.

[0007] Preferably, the transmission component includes a first sprocket and a second sprocket, the first sprocket being fixedly connected to the outer surface of the rotating shaft, the second sprocket being fixedly connected to the outer surface of the rotating rod, and a chain being driven between the first sprocket and the second sprocket.

[0008] Preferably, the driving component includes a central shaft, which is fixedly connected to the lower end of a rotating shaft. A fan blade is rotatably connected to the outer surface of the central shaft, and a sliding block is fixedly connected to the front end of the fan blade. A sliding ring is slidably connected to the outer surface of the sliding block.

[0009] Preferably, the hydraulic component includes a hydraulic pipe, which is fixedly connected to the left side of the tank. A first piston rod and a second piston rod are slidably connected to the inner surface of the hydraulic pipe. A rotating block is rotatably connected to the upper end of the first piston rod. The second piston rod is fixedly connected to the left side of the buffer plate. An elastic telescopic rod is fixedly connected between the buffer plate and the right side of the inner surface of the tank.

[0010] Preferably, the centrifugal component includes a rotating sleeve, which is fixedly connected to the lower part of the receiving seat and is rotatably connected to the lower part of the support frame. A receiving tube is fixedly connected to the outer surface of the receiving seat, and a metal ball is provided on the inner surface of the receiving tube. A steel wire rope connects the metal ball and the rotating block.

[0011] Preferably, the metering component includes a level gauge, which is fixedly connected to the top of the inner surface of the tank, and a liquid flow meter is fixedly installed on the right side of the tank.

[0012] Preferably, the adjusting component includes a support base, which is fixedly connected to the top of the tank. A second hydraulic chamber is fixedly connected to the left side of the support base. A second hydraulic rod is slidably connected to the inner surface of the second hydraulic chamber. A lifting ring is fixedly connected to the lower end of the second hydraulic rod. A pushing rod is fixedly connected below the lifting ring. The pushing rod passes through and is slidably connected to the top of the tank. The pushing rod also passes through and is slidably connected to the top of the conveying pipe. The pushing rod is fixedly connected to the top of the sliding ring.

[0013] Preferably, the adjusting component further includes a first hydraulic chamber, which is fixedly connected to the lower part of the support frame. The first hydraulic chamber is connected to a second hydraulic chamber by a pipeline. A first hydraulic rod is slidably connected to the inner surface of the first hydraulic chamber, and the first hydraulic rod is fixedly connected to the right side of the first piston rod.

[0014] Preferably, the recyclable component includes a guide frame, which is fixedly connected to the inner surface of the filter box. A filter screen is fixedly connected to the inner surface of the guide frame. A pump is fixedly installed at the bottom of the inner surface of the filter box. A pipeline connects the pump to the delivery pipe. The pipeline passes through and is fixedly connected to the top of the filter box and the guide frame.

[0015] Preferably, the recycling component further includes a connecting frame, which is fixedly connected between the filter box and the tank. A scraper is slidably connected above the filter screen, and a connecting rod is fixedly connected to the right side of the scraper. The connecting rod passes through and is slidably connected to the right side of the filter box, passes through and is slidably connected to the left side of the tank, and is fixedly connected to the front of the second piston rod.

[0016] The advantages of this application are:

[0017] (1) This application measures the amount of liquid produced by setting a metering element in the tank. When the oil is transported from the conveying pipe to the tank, if the oil viscosity is low, it will impact the drive component to rotate faster, thereby driving the centrifugal component to pull the hydraulic component to move the buffer plate to the lower end of the conveying pipe, thereby playing a buffering role to reduce the wave generated, which will cause the level gauge to float and produce errors.

[0018] (2) This application uses the centrifugal component to pull the hydraulic component and also drives the adjusting component to adjust the tilt angle of the fan blade of the drive component, so that the fan blade can rotate faster and has the function of facilitating the speed of the buffer plate movement.

[0019] (3) This application uses a recovery unit to perform secondary filtration and recovery of oil residue filtered from the filter vessel. The movement of the buffer plate can clean the filter screen in the recovery unit, which helps to prevent the filter screen from clogging. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a rear view of the overall structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0024] Figure 4 This is a rear sectional view of the overall structure of the present invention;

[0025] Figure 5 This is a partial structural schematic diagram of the present invention;

[0026] Figure 6 This is the invention Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0027] Figure 7 This is the invention Figure 3 Enlarged schematic diagram of the structure at point B;

[0028] Figure 8 This is the invention Figure 4 Enlarged schematic diagram of the structure at point C.

[0029] In the above diagram, 1. Filter vessel; 2. Filter box; 3. Conveying pipe; 4. Tank body; 401. Rotating shaft; 402. Support frame; 403. Rotating rod; 404. Receiving seat; 405. Buffer plate; 406. Baffle plate; 5. Driving component; 501. Central shaft; 502. Fan blade; 503. Sliding block; 504. Sliding ring; 6. Centrifugal component; 601. Rotating sleeve; 602. Receiving pipe; 603. Metal ball; 604. Steel wire rope; 7. Hydraulic component; 701. Hydraulic pipe; 702. First piston rod; 703. Second piston rod; 704. Rotating block; 705. 8. Elastic telescopic rod; 8. Adjusting component; 801. Support base; 802. Second hydraulic chamber; 803. Second hydraulic rod; 804. Lifting ring; 805. Push rod; 806. First hydraulic chamber; 807. First hydraulic rod; 9. Recovering component; 901. Guide frame; 902. Filter screen; 903. Pump; 904. Pipeline; 905. Connecting frame; 906. Scraper; 907. Connecting rod; 10. Transmission component; 101. First sprocket; 102. Second sprocket; 103. Chain; 11. Measuring component; 111. Level gauge; 112. Liquid flow meter. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0034] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Example 1, see Figures 1-8This embodiment provides an oilfield wellhead production fluid metering device, including a filter vessel 1. The filter vessel 1 is used for preliminary filtration of the oil fluid, which is existing technology. A filter box 2 is fixedly connected to the bottom of the filter vessel 1. A delivery pipe 3 is fixedly connected to the right side of the filter vessel 1. The delivery pipe 3 is L-shaped. A tank body 4 is fixedly connected to the outer surface of the delivery pipe 3. A rotating shaft 401 is slidably connected through the top of the delivery pipe 3. A shaft seal is provided between the rotating shaft 401 and the delivery pipe 3. The rotating shaft 401 is rotatably connected through the top of the tank body 4. A bearing is provided between the rotating shaft 401 and the tank body 4. A driving component 5 is provided at the lower end of the rotating shaft 401. The driving component 5 includes a central shaft 501, which is fixedly connected to the lower end of the rotating shaft 401. The outer surface of the central shaft 501 rotates. Eight fan blades 502 are connected to the front end of each fan blade 502. A cylindrical sliding block 503 is fixedly connected to the front end of each fan blade 502. A ring 504, also ring-shaped, is slidably connected to the outer surface of the sliding block 503. The inner ring of the ring 504 has an annular groove, and the sliding block 503 is positioned within this groove. A C-shaped support frame 402 is fixedly connected to the left side of the tank body 4. A rotating rod 403 is rotatably connected through the top of the support frame 402. The rotating rod 403 is rotatably connected to the upper part of the support frame 402. A bearing is provided between the rotating rod 403 and the support frame 402. A transmission component 10 is connected between the rotating rod 403 and the rotating shaft 401. The transmission component 10 includes a first sprocket 101 and a second... Two sprockets 102, a first sprocket 101 fixedly connected to the outer surface of a rotating shaft 401, and a second sprocket 102 fixedly connected to the outer surface of a rotating rod 403. Rotation of the rotating shaft 401 drives rotation of the rotating rod 403. A chain 103 drives the first sprocket 101 and the second sprocket 102. A receiving seat 404 is fixedly connected to the lower end of the rotating rod 403. The receiving seat 404 is hollow, and a centrifugal element 6 is provided on its outer surface. The centrifugal element 6 includes a rotating sleeve 601, which is fixedly connected to the lower part of the receiving seat 404 and communicates with it. The rotating sleeve 601 passes through and is rotatably connected to the lower part of a support frame 402. A bearing is provided between the rotating sleeve 601 and the support frame 402. A receiving tube 602 is fixedly connected to the outer surface of tank 404. The receiving tube 602 is slightly inclined upwards, and there are five receiving tubes 602. The receiving tubes 602 are connected to the receiving seat 404. The connection between the receiving tubes 602 and the receiving seat 404 is not large enough for a metal ball 603 to pass through. A metal ball 603 is provided on the inner surface of the receiving tube 602. A steel wire rope 604 connects the metal ball 603 to the rotating block 704. A buffer plate 405 is provided on the inner surface of tank 4. The buffer plate 405 is arc-shaped and made of rubber, with a certain degree of elasticity. A hydraulic component 7 is provided between the buffer plate 405 and the centrifugal component 6. The hydraulic component 7 includes a hydraulic pipe 701. Liquid is contained in the hydraulic pipe 701, and the hydraulic pipe 701 is fixedly connected to the left side of tank 4.A first piston rod 702 and a second piston rod 703 are slidably connected to the inner surface of the hydraulic pipe 701. The first piston rod 702 is located at the upper opening of the hydraulic pipe 701, and the second piston rod 703 is located at the right opening of the hydraulic pipe 701. A rotating block 704 is rotatably connected to the upper end of the first piston rod 702. The second piston rod 703 is fixedly connected to the left side of the buffer plate 405. An elastic telescopic rod 705 is fixedly connected between the buffer plate 405 and the right side of the inner surface of the tank 4. The elastic telescopic rod 705 specifically includes a sleeve rod and a movable rod, with a spring in the middle. The telescopic rod 705 automatically resets after being extended and released. A baffle 406 is fixedly connected to the outer surface of the conveying pipe 3. An adjusting component 8 for accelerating the driving speed is mounted above the driving component 5. A recovery component 9 for secondary filtration and recycling of the filtered material is mounted below the filter vessel 1. A metering component 11, including a level gauge 111, is mounted on the inner surface of the tank 4. The level gauge 111 measures the amount of oil in the tank 4 and is existing technology. The level gauge 111 is fixedly connected to the top of the inner surface of the tank 4. A liquid flow meter 112 is fixedly installed on the right side of the tank 4.

[0037] In practical use, the above-mentioned equipment first delivers the oil into the filter vessel 1, where it is filtered. Then, it is transported to the tank 4 via the delivery pipe 3. During this process, the oil level in the tank 4 rises until it reaches the level gauge 111. Once the level gauge 111 reaches its maximum level, it is counted as one tank. The oil is then delivered to the liquid flow meter 112 for measurement. When the viscosity of the delivered oil is low, the flow of the oil through the delivery pipe 3 will impact the fan blades. 502, the fan blade 502 drives the central shaft 501, causing the rotating shaft 401 to rotate. The rotation of the rotating shaft 401 drives the first sprocket 101 to rotate, which in turn drives the chain 103, causing the second sprocket 102 to rotate. The rotation of the second sprocket 102 drives the rotating rod 403 to rotate, which in turn drives the receiving seat 404 to rotate. The rotation of the receiving seat 404 causes the receiving tube 602 to rotate around the rotating rod 403. At this time, the receiving seat 402... The centrifugal force generated by the rotation of the 04 will cause the metal ball 603 to move away from the rotating rod 403 in the receiving tube 602. At this time, the metal ball 603 will pull the steel wire rope 604 to make the rotating block 704 rise. The rotating block 704 will pull the first piston rod 702 to rise. After the first piston rod 702 rises, it will draw the liquid in the hydraulic pipe 701, thereby causing the second piston rod 703 to retract into the hydraulic pipe 701. At this time, the second piston rod 703 will move to the left. The second piston rod 703 will pull the buffer plate 405 to move to the lower end of the delivery pipe 3. At this time, the buffer plate 405 will buffer the oil coming out of the lower end of the delivery pipe 3, thereby reducing the impact of water wave floating on the level gauge 111. If the oil delivered from the delivery pipe 3 has high viscosity and low flow rate, the rotation of the rotating shaft 401 is not enough to generate sufficient centrifugal force, and the buffer plate 405 will not move to the lower end of the delivery pipe 3, thereby preventing the buffer plate 405 from blocking the delivery speed of the high viscosity oil.

[0038] Example 2, see Figures 2-8The adjusting component 8 includes a support base 801, which is fixedly connected to the top of the tank body 4. A second hydraulic chamber 802 is fixedly connected to the left side of the support base 801. A second hydraulic rod 803 is slidably connected to the inner surface of the second hydraulic chamber 802. The second hydraulic rod 803 and the second hydraulic chamber 802 are slidably connected by a piston. A lifting ring 804 is fixedly connected to the lower end of the second hydraulic rod 803. The lifting ring 804 is located around the rotating shaft 401. A push rod 805 is fixedly connected below the lifting ring 804. There are two push rods 805. The push rods 805 pass through and are slidably connected to the top of the tank body 4. The push rods 805 also pass through and are slidably connected to the top of the conveying pipe 3. A rubber sealing gasket is provided between 3. The push rod 805 is fixedly connected to the upper part of the sliding ring 504. The adjusting component 8 also includes a first hydraulic chamber 806, which is filled with liquid. The first hydraulic chamber 806 is fixedly connected to the lower part of the support frame 402. The first hydraulic chamber 806 and the second hydraulic chamber 802 are connected by pipelines. The first hydraulic chamber 806 and the second hydraulic chamber 802 are connected and communicated by hoses. A first hydraulic rod 807 is slidably connected to the inner surface of the first hydraulic chamber 806. The first hydraulic rod 807 and the first hydraulic chamber 806 are slidably connected by a piston. The first hydraulic rod 807 is fixedly connected to the right side of the first piston rod 702. The first hydraulic rod 807 is L-shaped.

[0039] In practical use, when the metal ball 603 pulls the steel wire rope 604 under centrifugal force, causing the rotating block 704 to drive the first piston rod 702 upward, the upward movement of the first piston rod 702 will also drive the first hydraulic rod 807 upward. The upward movement of the first hydraulic rod 807 will push the liquid in the first hydraulic chamber 806 to be injected into the second hydraulic chamber 802 through the hose, thereby pushing the second hydraulic rod 803 to extend from the second hydraulic chamber 802. At this time, the second hydraulic rod 803 will descend, and the second hydraulic... The descent of rod 803 will cause lifting ring 804 to descend, which in turn will cause push rod 805 to descend. The descent of push rod 805 will cause sliding ring 504 to descend, which in turn will cause sliding block 503 to descend. The descent of sliding block 503 will cause fan blade 502 to rotate slightly, increasing the tilt angle of fan blade 502. At this time, the delivery of oil in delivery pipe 3 will drive the fan blade 502 to rotate faster, thereby increasing the centrifugal force, so as to accelerate the pulling of buffer plate 405 to the bottom of delivery pipe 3.

[0040] Example 3, see Figures 1-3The recycling component 9 includes a guide frame 901 with an opening in the middle and a concave slope on its upper surface. The guide frame 901 is fixedly connected to the inner surface of the filter box 2, and a filter screen 902 is fixedly connected to the inner surface of the guide frame 901. A pumping pump 903 is fixedly installed at the bottom of the inner surface of the filter box 2. The pumping pump 903 is used to extract the mixed oil in the filter box 2. A pipe 904 connects the pumping pump 903 to the delivery pipe 3. The pipe 904 has three bends and passes through and is fixedly connected to the top of the filter box 2 and the guide frame 901. The recycling component 9 also includes a connecting frame. 905, the connecting frame 905 is U-shaped and is fixedly connected between the filter box 2 and the tank 4. A scraper 906 is slidably connected above the filter screen 902. The scraper 906 is used to scrape the residue above the filter screen 902. A connecting rod 907 is fixedly connected to the right side of the scraper 906. The connecting rod 907 has two bends. The connecting rod 907 passes through and is slidably connected to the right side of the filter box 2. An annular rubber sealing gasket is provided between the connecting rod 907 and the filter box 2. The connecting rod 907 passes through and is slidably connected to the left side of the tank 4. The connecting rod 907 is fixedly connected to the front of the second piston rod 703.

[0041] In practical use, after the oil is filtered in the filter tank 1, the residue is transported to the filter box 2. At this time, the filter screen 902 in the filter box 2 will perform secondary filtration on the residue, blocking the waste residue above the filter screen 902. The remaining oil falls to the bottom of the filter box 2. Then, the pump 903 draws the oil from the filter box 2 and transports it through the pipeline 904 to the delivery pipe 3, and finally it falls into the tank 4. When the second piston rod 703 pulls the buffer plate 405 to the lower end of the delivery pipe 3, the second piston rod 703 will also drive the connecting rod 907 to move to the left. The leftward movement of the connecting rod 907 will drive the scraper 906 to slide above the filter screen 902. The scraper 906 will push the waste residue above the filter screen 902 to prevent it from accumulating, thereby ensuring the unobstructed flow of the filter screen 902.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A metering device for the production volume of oilfield wellheads, comprising a filter vessel (1), a filter box (2) fixedly connected below the filter vessel (1), a delivery pipe (3) fixedly connected to the right side of the filter vessel (1), and a tank body (4) fixedly connected to the outer surface of the delivery pipe (3), characterized in that, A rotating shaft (401) is slidably connected through the top of the conveying pipe (3). The rotating shaft (401) is rotatably connected through the top of the tank body (4). A driving component (5) is provided at the lower end of the rotating shaft (401). A support frame (402) is fixedly connected to the left side of the tank body (4). A rotating rod (403) is rotatably connected through the top of the support frame (402). A transmission component (10) is connected between the rotating rod (403) and the rotating shaft (401). A receiving seat (404) is fixedly connected to the lower end of the rotating rod (403). The outer surface of the receiving seat (404) is provided with a centrifugal element (6), the inner surface of the tank (4) is provided with a buffer plate (405), a hydraulic element (7) is provided between the buffer plate (405) and the centrifugal element (6), a baffle (406) is fixedly connected to the outer surface of the conveying pipe (3), an adjustment element (8) for accelerating the driving speed is installed above the driving element (5), a recovery element (9) for secondary filtration and recycling of the filter material is installed below the filter vessel (1), and a metering element (11) is installed on the inner surface of the tank (4). The driving component (5) includes a central shaft (501), which is fixedly connected to the lower end of a rotating shaft (401). A fan blade (502) is rotatably connected to the outer surface of the central shaft (501), and a sliding block (503) is fixedly connected to the front end of the fan blade (502). A sliding ring (504) is slidably connected to the outer surface of the sliding block (503). The centrifugal component (6) includes a rotating sleeve (601), which is fixedly connected to the lower part of the receiving seat (404). The rotating sleeve (601) is rotatably connected to the lower part of the support frame (402). A receiving tube (602) is fixedly connected to the outer surface of the receiving seat (404). A metal ball (603) is provided on the inner surface of the receiving tube (602). A steel wire rope (604) is connected between the metal ball (603) and the rotating block (704). The adjusting component (8) includes a support base (801), which is fixedly connected to the top of the tank body (4). A second hydraulic chamber (802) is fixedly connected to the left side of the support base (801). A second hydraulic rod (803) is slidably connected to the inner surface of the second hydraulic chamber (802). A lifting ring (804) is fixedly connected to the lower end of the second hydraulic rod (803). A push rod (805) is fixedly connected below the lifting ring (804). The push rod (805) passes through and is slidably connected to the top of the tank body (4). The push rod (805) passes through and is slidably connected to the top of the conveying pipe (3). The push rod (805) is fixedly connected to the top of the sliding ring (504).

2. The oilfield wellhead fluid production metering device according to claim 1, characterized in that, The transmission component (10) includes a first sprocket (101) and a second sprocket (102). The first sprocket (101) is fixedly connected to the outer surface of the rotating shaft (401), and the second sprocket (102) is fixedly connected to the outer surface of the rotating rod (403). A chain (103) is connected between the first sprocket (101) and the second sprocket (102).

3. The oilfield wellhead fluid production metering device according to claim 1, characterized in that, The hydraulic component (7) includes a hydraulic pipe (701), which is fixedly connected to the left side of the tank (4). A first piston rod (702) and a second piston rod (703) are slidably connected to the inner surface of the hydraulic pipe (701). A rotating block (704) is rotatably connected to the upper end of the first piston rod (702). The second piston rod (703) is fixedly connected to the left side of the buffer plate (405). An elastic telescopic rod (705) is fixedly connected between the buffer plate (405) and the right side of the inner surface of the tank (4).

4. The oilfield wellhead fluid production metering device according to claim 1, characterized in that, The metering component (11) includes a level gauge (111), which is fixedly connected to the top of the inner surface of the tank (4), and a liquid flow meter (112) is fixedly installed on the right side of the tank (4).

5. The oilfield wellhead fluid production metering device according to claim 4, characterized in that, The adjusting component (8) further includes a first hydraulic chamber (806), which is fixedly connected to the bottom of the support frame (402). The first hydraulic chamber (806) and the second hydraulic chamber (802) are connected by pipelines. A first hydraulic rod (807) is slidably connected to the inner surface of the first hydraulic chamber (806), and the first hydraulic rod (807) is fixedly connected to the right side of the first piston rod (702).

6. The oilfield wellhead fluid production metering device according to claim 1, characterized in that, The recycling component (9) includes a guide frame (901), which is fixedly connected to the inner surface of the filter box (2). A filter screen (902) is fixedly connected to the inner surface of the guide frame (901). A pump (903) is fixedly installed at the bottom of the inner surface of the filter box (2). A pipe (904) is connected between the pump (903) and the delivery pipe (3). The pipe (904) passes through and is fixedly connected to the top of the filter box (2) and the guide frame (901).

7. The oilfield wellhead fluid production metering device according to claim 6, characterized in that, The recycling component (9) also includes a connecting frame (905), which is fixedly connected between the filter box (2) and the tank (4). A scraper (906) is slidably connected above the filter screen (902). A connecting rod (907) is fixedly connected to the right side of the scraper (906). The connecting rod (907) passes through and is slidably connected to the right side of the filter box (2). The connecting rod (907) passes through and is slidably connected to the left side of the tank (4). The connecting rod (907) is fixedly connected to the front of the second piston rod (703).

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