Oilfield produced liquid oil-gas-water single-well sled-mounted three-phase metering device

Abstract

The utility model discloses an oilfield production liquid oil gas water single well pry installation formula three -phase measuring device, be equipped with two measuring tanks in the box, and the bottom of two measuring tanks is supported on pry installation base respectively, and the top of two measuring tanks is connected through liquid inlet communication pipe and gas phase communication pipe, and the middle part entrance of liquid inlet communication pipe is connected with the liquid inlet of the extension box body, and the middle part export of gas phase communication pipe is connected with the exhaust manifold of the extension box body, and the exhaust manifold is installed with gas flowmeter, and the bottom of two measuring tanks is connected through liquid outlet communication pipe and balance communication pipe, and the middle part export of liquid outlet communication pipe is connected with the liquid outlet of the extension box body, and the top of two measuring tank is equipped with the measuring tank hoist and pull mechanism that can hoist the measuring tank upwards respectively, and the middle part of pry installation base is fixed with the weighing support, and the top of weighing support is installed with the lifting weighing mechanism that can hoist and weigh two measuring tanks synchronously. The device can carry out three -phase continuous measurement to single well production liquid, and can recycle.

Description

Technical Field

[0001] This utility model relates to an oil well metering device, a skid-mounted three-phase metering device for oil, gas and water produced in an oilfield, belonging to the technical field of oilfield metering equipment, and is used for single-well three-phase metering of oilfield produced fluids. Background Technology

[0002] The raw fluid produced from oil wells during oilfield production is a mixture of crude oil, water, and associated gas, often simply referred to as well-produced fluid. Currently, during production, well-produced fluid is transported via gathering pipelines to the oilfield joint station or a dedicated metering facility for centralized processing and metering. However, as oilfields gradually enter the later stages of development, to accurately grasp the production status of each well, it is necessary to individually meter each well according to its three-phase components (oil, water, and gas), a process known as single-well metering. This is particularly important for metering the oil production of each well, allowing for timely monitoring of the well's operating conditions and enabling rational production scheduling. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or prior art, this utility model is proposed.

[0005] The purpose of this invention is to overcome the problems existing in the prior art and provide a skid-mounted three-phase metering device for oil, gas and water produced in oilfields. This device can continuously meter the three phases of produced fluids from a single well and is designed to be skid-mounted. It can also be recycled by being transported by a vehicle.

[0006] To solve the above technical problems, this utility model provides a skid-mounted three-phase metering device for single-well oil, gas and water production in oilfields, including a housing. Two metering tanks are housed within the housing, their bottoms supported by legs on a skid-mounted base. The tops of the two metering tanks are connected by a liquid inlet pipe and a gas inlet pipe. The liquid inlet pipe has a T-junction inlet connected to a liquid inlet extending outside the housing. The gas inlet pipe has a T-junction outlet connected to an exhaust manifold extending outside the housing, and a gas flow meter is installed on the exhaust manifold.

[0007] The bottoms of the two metering tanks are connected by an outlet connecting pipe and a balance connecting pipe, and the outlet connecting pipe has a three-way outlet in the middle that extends out of the tank body.

[0008] Above each of the two metering tanks is a metering tank lifting mechanism that can lift the metering tanks upwards. A weighing bracket is fixed in the middle of the skid-mounted base, and a lifting and weighing mechanism that can lift and weigh the two metering tanks simultaneously is installed on the top of the weighing bracket.

[0009] As an improvement to this utility model, the upper circumference of the two metering tanks is welded with metering tank flanges respectively, and the metering tank lifting mechanism includes a cross-shaped hanger that intersects in a cross shape. The four ends of the cross-shaped hanger are connected to the corresponding metering tank flanges by slings or lifting rods respectively.

[0010] As a further improvement of this utility model, upright columns are fixed to the middle of both sides of the skid-mounted base along its length, and the tops of the two columns are connected by a transverse load-bearing beam 8, which is located below the top wall of the box.

[0011] As a further improvement of this utility model, a straightening and limiting mechanism is provided above the two metering tanks respectively. The straightening and limiting mechanism includes a lifting lug, a lifting lug base plate and a lifting rod. The upper end of the lifting lug is welded to the lower part of the transverse load-bearing beam 8, and the lifting lug base plate is welded to the lower end of the lifting lug. The lifting rod is connected to the center of the corresponding cross-shaped hanger and extends upward. The upper end of the two lifting rods passes through the central hole of the lifting lug base plate and is provided with a mushroom head at the upper end.

[0012] As a further improvement of this utility model, the cross-shaped hanger includes a horizontal hanger and a vertical hanger that are stacked and fixed together, or are located in the same plane and welded together in a cross shape.

[0013] As a further improvement of this utility model, the lifting and weighing mechanism includes a lifting motor, a lifting reducer, a lifting beam, and weighing sensors. The bottoms of the two weighing sensors are symmetrically fixed to both ends of the lifting beam, and the tops of the two weighing sensors are symmetrically supported below the center of the corresponding cross-shaped hangers. The lifting reducer is fixed to the top of the weighing bracket. The input shaft of the lifting reducer is driven by the lifting motor, and the upper end of the output shaft of the lifting reducer abuts against the bottom of the lifting beam.

[0014] As a further improvement of this utility model, the weighing support includes four weighing support legs arranged in a rectangle. The top of the weighing support legs on the same side are fixedly connected to the weighing support longitudinal beam. The two weighing support longitudinal beams are connected as a whole by a transverse connecting rod. The bottom of the lifting reducer is fixed to the top center of the corresponding weighing support longitudinal beam.

[0015] As a further improvement of this utility model, the top of the outer end of the weighing sensor is connected to the lower center of the corresponding cross-shaped hanger via a universal bullseye bearing; the inner end of the weighing sensor is fixed to the top of the end of the lifting beam.

[0016] As a further improvement of this utility model, electric valves are provided at both ends of the liquid outlet connecting pipe and the balance connecting pipe.

[0017] As a further improvement of this utility model, the two ends of the liquid inlet connecting pipe are respectively inserted downward into the inner cavity of the metering tank, and a gas-liquid separation umbrella in the shape of a perfect circular cone is provided below the two ports.

[0018] As a further improvement of this utility model, the liquid inlet connecting pipe, the gas connecting pipe, the liquid outlet connecting pipe, and the balance connecting pipe are all connected to the metering tank by flexible connections; the lifting reducer is a worm gear reducer.

[0019] As a further improvement of this utility model, the inner or outer wall of the box is covered with a heat insulation layer, and an air conditioner for temperature control is installed in the inner cavity.

[0020] As a further improvement of this utility model, the two metering tanks are respectively equipped with liquid level sensors. The signal lines of the liquid level sensors, weighing sensors, gas flow meters and each electric valve are respectively connected to the corresponding ports of the PLC controller. The output port of the PLC controller is connected to the recorder, touch screen, wireless transmission module or wired transmission module.

[0021] Compared with existing technologies, this invention has achieved the following beneficial effects: The development of this device can solve the problem of continuous three-phase metering of oil well produced fluid, and can accurately measure the content of oil, gas and water in the oil well produced fluid, providing accurate field data for accurately grasping the production status of each oil well. At the same time, the skid-mounted design of this device allows for switching between multiple oil wells for measurement by being carried by a vehicle, realizing the reusability and recycling of this device, greatly saving costs; and it also greatly improves the labor efficiency of oil workers and reduces their labor intensity. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein:

[0023] Figure 1 This is the front view of the skid-mounted three-phase metering device for single-well oil, gas and water produced in oilfields according to this utility model.

[0024] Figure 2 for Figure 1 The right view;

[0025] Figure 3 for Figure 1 3D Figure 1 ;

[0026] Figure 4 for Figure 1 3D Figure 2 ;

[0027] Figure 5 This is an enlarged view of the connection between the liquid inlet pipe and the gas-liquid separation umbrella in this utility model;

[0028] In the diagram: 1. Metering tank; 1a. Metering tank flange;

[0029] 2. Metering tank lifting mechanism; 2a. Cross-shaped hanger; 2b. Lifting rod;

[0030] 3. Alignment and limiting mechanism; 3a. Lifting lug; 3b. Lifting lug base plate; 3c. Lifting rod;

[0031] 4. Weighing support; 4a. Weighing support legs; 4b. Weighing support longitudinal beam; 4c. Transverse connecting rod;

[0032] 5. Lifting and weighing mechanism; 5a. Lifting motor; 5b. Lifting reducer; 5c. Lifting beam; 5d. Weighing sensor;

[0033] 6. Skid-mounted base; 7. Column; 8. Horizontal load-bearing beam; 9. Liquid inlet; 10. Liquid inlet connecting pipe; 11. Gas connecting pipe; 12. Exhaust manifold; 13. Gas flow meter; 14. Liquid outlet connecting pipe; 15. Liquid outlet; 16. Balance connecting pipe; 17. Electric valve; 18. Gas-liquid separator. Detailed Implementation

[0034] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0035] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] like Figures 1 to 4 As shown, the oilfield produced fluid single-well skid-mounted three-phase metering device of this utility model includes a box, a metering tank 1, a metering tank lifting mechanism 2, a straightening and limiting mechanism 3, a weighing bracket 4, and a lifting and weighing mechanism 5. For clarity, the box is omitted in the figure.

[0038] The box contains two metering tanks 1, and the bottoms of the two metering tanks 1 are supported on the skid base 6 by support legs. The top front sides of the two metering tanks 1 are connected by a liquid inlet connecting pipe 10. The two ends of the liquid inlet connecting pipe 10 are bent downward and inserted into the tank. The middle three-way inlet of the liquid inlet connecting pipe 10 is connected to a liquid inlet 9 that extends forward from the upper part of the front side wall of the box, which facilitates connection with the production pipeline of the oil well.

[0039] like Figure 5 As shown, the two ends of the liquid inlet connecting pipe 10 are inserted downward into the inner cavity of the metering tank 1, and a gas-liquid separation umbrella 18 in the shape of a perfect circular cone is provided below the two ends. The oilfield produced liquid falls at the cone top of the gas-liquid separation umbrella 18 and flows downward along the cone surface of the gas-liquid separation umbrella 18, increasing the specific surface area and facilitating the overflow of the gas phase.

[0040] The top rear sides of the two metering tanks 1 are connected by a gas connection pipe 11. The middle tee outlet of the gas connection pipe 11 is connected to an exhaust manifold 12 that extends out of the box body. The outlet of the exhaust manifold 12 extends out of the rear side wall of the box body. A gas flow meter 13 is installed on the exhaust manifold 12 for measuring the gas phase.

[0041] The bottoms of the two metering tanks 1 are connected by an outlet connecting pipe 14 and a balance connecting pipe 16. The outlet of the outlet connecting pipe 14 is connected to an outlet 15 extending from the lower part of the front side wall of the tank, so that the oil-water mixture can flow out from the lower front side of the tank.

[0042] Electric valves 17 are installed at both ends of the liquid outlet connecting pipe 14 and the balance connecting pipe 16 respectively; the liquid inlet connecting pipe 10, the gas connecting pipe 11, the liquid outlet connecting pipe 14 and the balance connecting pipe 16 are all connected to the metering tank 1 with flexible connections to ensure a certain displacement margin.

[0043] Above the two metering tanks 1, there are metering tank lifting mechanisms 2 that can lift the metering tanks 1 upwards. A weighing bracket 4 is fixed in the middle of the skid base 6. A lifting and weighing mechanism 5 that can lift and weigh the two metering tanks 1 simultaneously is installed on the top of the weighing bracket 4.

[0044] The upper end caps of the two metering tanks 1 are connected to the metering tank body through metering tank flange 1a and bolts. Metering tank flange 1a facilitates both lifting of metering tank 1 and cleaning of the inner cavity of metering tank after disassembly.

[0045] The metering tank lifting mechanism 2 includes a cross-shaped hanger 2a, with each of the four ends of the cross-shaped hanger 2a connected to the corresponding metering tank flange 1a via slings or lifting rods 2b. When the cross-shaped hanger 2a is lifted upwards, the metering tank is lifted as a whole and detached from the skid-mounted base 6 via the four lifting rods 2b, facilitating the weighing of the metering tank.

[0046] The cross-shaped hanger 2a includes a horizontal hanger and a vertical hanger that are stacked on top of each other and fixed together, with the horizontal hanger located above the vertical hanger.

[0047] The cross-shaped hanger 2a can also take other forms, such as having four arms located in the same plane and welded together in a cross shape.

[0048] The two sides of the skid-mounted base 6 are respectively fixed with upright columns 7 in the middle of their length direction. The tops of the two columns 7 are connected by a transverse load-bearing beam 8, which is located below the top wall of the box, forming a gantry structure inside the box.

[0049] Above each of the two measuring tanks 1, a centering and limiting mechanism 3 is provided. The centering and limiting mechanism 3 includes a lifting lug 3a, a lifting lug base plate 3b, and a lifting rod 3c. The upper ends of the lifting lugs 3a are welded to the lower part of the transverse load-bearing beam 8, and the lifting lug base plate 3b is welded to the lower end of the lifting lugs 3a. The lifting rods 3c are connected to the center of the corresponding cross-shaped hangers 2a and extend upwards. The upper ends of the two lifting rods 3c pass through the central hole of the lifting lug base plate 3b, and each has a mushroom-shaped lifting rod head at its upper end. When the cross-shaped hangers 2a are lifted upwards, the upper lifting rods 3c are restricted to floating up and down within the central hole of the lifting lug base plate 3b, preventing tilting during weighing.

[0050] The lifting and weighing mechanism 5 includes a lifting motor 5a, a lifting reducer 5b, a lifting beam 5c, and load cells 5d. The bottoms of the two load cells 5d are symmetrically fixed to both ends of the lifting beam 5c, and the tops of the two load cells 5d are symmetrically supported below the center of the corresponding cross-shaped hangers 2a. The lifting reducer 5b is fixed to the top of the weighing bracket 4 and is a worm gear reducer. The input shaft of the lifting reducer 5b is driven by the lifting motor 5a, and the upper ends of the output shafts of the lifting reducer 5b abut against the bottom of the lifting beam 5c.

[0051] The weighing support 4 includes four weighing support legs 4a arranged in a rectangle. The top of the weighing support legs 4a on the same side is fixedly connected to the weighing support longitudinal beam 4b. The two weighing support longitudinal beams 4b are connected as a whole by a transverse connecting rod 4c. The bottom of the lifting reducer 5b is fixed to the top center of the corresponding weighing support longitudinal beam 4b.

[0052] The top of the outer end of the load cell 5d is connected to the center of the corresponding cross-shaped hanger 2a via a universal bullseye bearing; the inner end of the load cell 5d is fixed to the top of the end of the lifting beam 5c.

[0053] Two lifting motors 5a synchronously drive the corresponding lifting reducers 5b to operate. The output ends of the two lifting reducers 5b synchronously drive the lifting beam 5c to rise smoothly until the weighing sensors 5d at both ends of the lifting beam 5c fully bear the weight of the corresponding cross-shaped hanger 2a and the metering tank 1.

[0054] The metering process of this device is as follows: During operation, the inlet 9 is connected to the production pipeline of the oil well, the electric valve 17 on the outlet connecting pipe 14 is closed, and the electric valve 17 on the balance connecting pipe 16 is opened. The oil well produced fluid enters the two metering tanks 1 through the inlet 9 and the inlet connecting pipe 10. Gas-liquid separation is achieved through the gas-liquid separation umbrella 18. After gas-liquid separation, the produced gas will accumulate at the top of the metering tank 1 due to its low density. It will be discharged through the gas connecting pipe 11. After the gas flow rate is accurately measured, it will be discharged through the exhaust manifold 12.

[0055] The level gauge installed in the metering tank 1 can accurately measure the volume of the liquid inside the tank. The metering tank 1 can be weighed by the load sensor, the metering tank lifting mechanism 2, and the lifting and weighing mechanism 5, so as to obtain the mass of the liquid inside the tank. After the volume and mass of the mixed liquid inside the tank are measured, the electric valve 17 on the liquid outlet connecting pipe 14 is opened, while the electric valve 17 on the balance connecting pipe 16 remains open. The mixed liquid flows out from the liquid outlet connecting pipe 14 and the liquid outlet 15, completing the entire measurement.

[0056] Technical principle: Because the physical properties of crude oil are specific to a particular block within an oilfield, meaning the density of crude oil in each well is constant, the water content can be determined from the mass and volume of the mixture. For example, for an oil well with a crude oil density of 0.87 kg / L and a volume of 1 m³... 3 The mass, volume, and water content of the mixture are shown in the table below:

[0057] Moisture content Oil content percentage Oil weight (kg) Water weight (kg) Total weight (kg) 0 100 870 0 870 1 99 861.3 10 871.3 2 98 852.6 20 872.6 3 97 843.9 30 873.9 4 96 835.2 40 875.2 5 95 826.5 50 876.5 6 94 817.8 60 877.8 7 93 809.1 70 879.1 8 92 800.4 80 880.4 9 91 791.7 90 881.7 10 90 783 100 883 11 89 774.3 110 884.3 12 88 765.6 120 885.6 13 87 756.9 130 886.9 14 86 748.2 140 888.2 15 85 739.5 150 889.5

[0058] Therefore, by continuously measuring the mass increment and volume increment of the mixture within a certain time range, the water content of the mixture can be calculated. In this way, the three-phase metering of the oil well produced fluid can be achieved through this device. After the metering is completed, the mixture is connected to the gear pump through the outlet 15, and the mixture inside the metering tank 1 is transported to the gathering pipeline or collected in a ton container by the gear pump.

[0059] Two metering tanks 1 are each equipped with a level sensor. The signal lines of the level sensors, load cells 5d, gas flow meters 13, and each electric valve 17 are connected to the corresponding ports of the PLC controller. The output ports of the PLC controller are connected to a recorder, a touch screen, a wireless transmission module, or a wired transmission module. Simultaneously, this device is equipped with a data recording device. By connecting the signals from the load cells 5d, level sensors, gas flow meters 13, and the four electric valves 17 to the PLC controller, the PLC controller sends the relevant information to the recorder, enabling real-time recording of the weight, level, gas volume, and valve open / close status of the metering tanks 1, achieving continuous metering data recording and remote transmission.

[0060] This device uses a metering tank separation principle to separate oil, gas, and water in the produced liquid. Based on the density differences between oil, gas, and water, it determines the oil, gas, and water content in the produced liquid through weighing and other methods. A worm gear lifting mechanism, along with universal bullseye bearings and a lateral limiting device, ensures the radial freedom of the lifted tank while restricting the lateral freedom of the device. Finally, the weighing of metering tank 1 is achieved through a 5d load cell. The skid-mounted equipment is also equipped with an external insulation layer.

[0061] The inner or outer wall of the tank is covered with an insulation layer, and an air conditioner is installed in the inner cavity to control the temperature of the inner cavity. This prevents the crude oil from solidifying and becoming unmeasurable due to low temperatures in winter. At the same time, the upper part of the metering tank is connected by a flange, which allows for disassembly and regular cleaning of the metering tank to ensure the accuracy of the measurement.

[0062] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A skid-mounted three-phase metering device for single-well oil, gas, and water produced in an oilfield, comprising a housing, characterized in that, The housing contains two metering tanks, each supported at the bottom by a leg on a skid-mounted base. The tops of the two metering tanks are connected by a liquid inlet pipe and a gas inlet pipe. The liquid inlet pipe has a T-junction inlet at the middle, which extends out of the housing. The gas inlet pipe has a T-junction outlet at the middle, which extends out of the housing, and a gas flow meter is installed on the gas inlet pipe. The bottoms of the two metering tanks are connected by an outlet connecting pipe and a balance connecting pipe, and the outlet connecting pipe has a three-way outlet in the middle that extends out of the tank body. Above each of the two metering tanks is a metering tank lifting mechanism that can lift the metering tanks upwards. A weighing bracket is fixed in the middle of the skid-mounted base, and a lifting and weighing mechanism that can lift and weigh the two metering tanks simultaneously is installed on the top of the weighing bracket.

2. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 1, characterized in that: The upper circumference of the two metering tanks is welded with metering tank flanges respectively. The metering tank lifting mechanism includes a cross-shaped hanger that intersects in a cross shape. The four ends of the cross-shaped hanger are connected to the corresponding metering tank flanges by slings or lifting rods respectively.

3. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 2, characterized in that: The skid-mounted base has upright columns fixed to the middle of both sides along its length. The tops of the two columns are connected by a transverse load-bearing beam located below the top wall of the box.

4. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 3, characterized in that: Above the two metering tanks, there are also uprighting and limiting mechanisms. Each uprighting and limiting mechanism includes a lifting lug, a lifting lug base plate, and a lifting rod. The upper end of the lifting lug is welded to the lower part of the transverse load-bearing beam, and the lifting lug base plate is welded to the lower end of the lifting lug. The lifting rod is connected to the center of the corresponding cross-shaped hanger and extends upward. The upper end of the two lifting rods passes through the central hole of the lifting lug base plate and is provided with a mushroom head at the upper end.

5. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 2, characterized in that: The cross-shaped hanger includes horizontal hangers and vertical hangers that are stacked and fixed together, or they are located in the same plane and welded together in a cross shape.

6. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 2, characterized in that: The lifting and weighing mechanism includes a lifting motor, a lifting reducer, a lifting beam, and load cells. The bottoms of the two load cells are symmetrically fixed to both ends of the lifting beam, and the tops of the two load cells are symmetrically supported below the center of the corresponding cross-shaped hangers. The lifting reducer is fixed to the top of the weighing bracket. The input shaft of the lifting reducer is driven by the lifting motor, and the upper end of the output shaft of the lifting reducer abuts against the bottom of the lifting beam.

7. The skid-mounted three-phase metering device for single-well oil, gas, and water production fluids according to claim 6, characterized in that: The weighing support includes four weighing support legs arranged in a rectangle. The top of the weighing support legs on the same side are fixedly connected to the weighing support longitudinal beam. The two weighing support longitudinal beams are connected as a whole by a transverse connecting rod. The bottom of the lifting reducer is fixed to the top center of the corresponding weighing support longitudinal beam.

8. The skid-mounted three-phase metering device for single-well oil, gas, and water production fluids in oilfields according to claim 7, characterized in that: The top of the outer end of the load cell is connected to the center of the corresponding cross-shaped hanger via a universal bullseye bearing; the inner end of the load cell is fixed to the top of the end of the lifting beam.

9. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 6, characterized in that: Electric valves are installed at both ends of the liquid outlet connecting pipe and the balance connecting pipe.

10. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 1, characterized in that: The two ends of the liquid inlet connecting pipe are respectively inserted downward into the inner cavity of the metering tank, and a gas-liquid separation umbrella in the shape of a perfect circular cone is provided below the two ports.

11. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 6, characterized in that: The inlet pipe, gas pipe, outlet pipe, and balance pipe are all connected to the metering tank via flexible connections; the lifting reducer is a worm gear reducer.

12. The skid-mounted three-phase metering device for single-well oil, gas, and water production fluids according to claim 1, characterized in that: The inner or outer wall of the enclosure is covered with an insulation layer, and an air conditioner for temperature control is installed in the inner cavity.

13. The skid-mounted three-phase metering device for single-well oil, gas, and water production in oilfields according to claim 9, characterized in that: Two metering tanks are each equipped with a liquid level sensor. The signal lines of the liquid level sensor, weighing sensor, gas flow meter and each electric valve are respectively connected to the corresponding ports of the PLC controller. The output port of the PLC controller is connected to the recorder, touch screen, wireless transmission module or wired transmission module.

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