A large flow metering device for oil wells

Abstract

This application relates to a high-flow-rate metering device for oil wells, comprising: an inlet bend, a gas-liquid separator, a gas float flowmeter, a liquid float flowmeter, a water cut monitor, a gas pipeline, and an outlet bend. The inlet bend, gas-liquid separator, and gas pipeline are connected side-by-side. The liquid float flowmeter is positioned in the central space between the water cut monitor and the gas-liquid separator. The inlet bend is connected to the inlet of the gas-liquid separator, and the gas outlet of the gas-liquid separator is connected to the gas pipeline. A forward-extending straight outlet pipe is provided at the outlet of the gas-liquid separator. The water cut monitor is installed at the flange port of the straight outlet pipe, and an outlet is provided on the upper side of the straight outlet pipe. The liquid float flowmeter is positioned above the straight outlet pipe, and its outlet is connected to the inlet at the bottom of the liquid float flowmeter. The high-flow-rate metering device for oil wells proposed in this application has a simple overall structure and is easy to install and maintain.

Description

Technical Field

[0001] This application relates to the field of oil well metering, and in particular to a high-flow-rate metering device for oil wells. Background Technology

[0002] In the field of petroleum metering, oil production and flow rates typically vary over a wide range. For example, in oil production, flow rates can range from a few liters to thousands of liters per minute, from wells to storage tanks to transportation pipelines. Therefore, flow meters capable of accommodating different flow ranges are needed to ensure accurate measurement and monitoring. However, existing metering devices with large measurement ranges tend to have complex structures and high installation and maintenance costs. Utility Model Content

[0003] In view of the technical problems existing in the prior art, this application proposes a high-flow-rate metering device for oil wells. This high-flow-rate metering device for oil wells not only has a large metering range, but also has a simple structure and is easy to install and maintain.

[0004] This application provides a high-flow-rate metering device for oil wells, comprising: an inlet bend, a gas-liquid separator, a gas float flowmeter, a liquid float flowmeter, a water cut monitor, a gas pipeline, and an outlet bend. The inlet bend, the gas-liquid separator, and the gas pipeline are connected side-by-side. The liquid float flowmeter is positioned in the middle space between the water cut monitor and the gas-liquid separator. The inlet bend is connected to the inlet of the gas-liquid separator, and the gas outlet of the gas-liquid separator is connected to the gas pipeline. A forward-extending straight outlet pipe is provided at the outlet of the gas-liquid separator. A moisture content monitor is installed at the flange port of the pipe. An outlet is provided on the upper side of the straight outlet pipe. The liquid float flow meter is located above the straight outlet pipe. The outlet is connected to the inlet at the bottom of the liquid float flow meter. The outlet bend includes a first bend and a second bend that are connected. The first bend and the second bend have a non-circular structure. The first bend is connected to the outlet located on the side of the liquid float flow meter. The second bend is arranged side by side with the gas-liquid separator. The gas pipeline is connected to the second bend. The gas float flow meter is installed on the gas pipeline.

[0005] Optionally, the liquid inlet of the gas-liquid separator is located on the left side of the gas-liquid separator, the liquid outlet of the gas-liquid separator is located on the front side of the gas-liquid separator, and the gas outlet is located at the top of the gas-liquid separator.

[0006] Optionally, the liquid inlet of the liquid inlet bend faces the left front of the gas-liquid separator, and the liquid outlet of the liquid outlet bend faces the right front of the gas-liquid separator.

[0007] Optionally, the float in the liquid float flowmeter has a conical structure, and the preset diameter of the float is greater than 45mm.

[0008] Optionally, the diameter of the liquid inlet bend is greater than 100 mm.

[0009] Optionally, the gas-liquid separator is a cyclone gas-liquid separator, which includes a cyclone separator cylinder, a first flange, a second flange, and a collector connected in sequence. The first flange, the second flange, and the collector form a movable chamber. The lower port of the cyclone separator cylinder is a sealed port, and the liquid outlet of the gas-liquid separator is located on the side near the lower port. The upper port of the cyclone separator cylinder is connected to the first flange, and the gas outlet is located at the top of the collector. A float connecting rod is inserted in the movable chamber, and a float and a plug are respectively provided at both ends of the float connecting rod. When the liquid in the gas-liquid separator flows towards the first flange, the float will cause the plug to move towards the gas outlet under the action of the liquid, and the plug will block the gas outlet.

[0010] Optionally, the collector has a U-shaped structure, and its port is connected to the second flange. The collector also has a fixing plate with a conical concave head fixed on it. The conical concave head has a through hole along its center line. The gas outlet is located at the center of the arc-shaped end of the collector. The gas outlet and the through hole are connected through the cavity of the collector. The through hole is connected to the movable chamber. The plug is a conical convex head. When the float rises, the convex head on the float connecting rod enters the through hole of the concave head, thus blocking the through hole.

[0011] Optionally, the gas-liquid separator further includes a screen and a centralizing sleeve. The screen has an annular structure and multiple ventilation holes. The screen is embedded and fixed in the hollow structure of the first flange. The centralizing sleeve has a cylindrical structure and is sleeved on the outside of the float connecting rod.

[0012] Optionally, the float includes a float cavity and a float cover. The float cavity is a cylindrical structure closed at one end. The float cover is disposed on the open end of the float cavity. The float cover is detachably connected to the float cavity. The float cover is connected to the end of the float connecting rod.

[0013] Optionally, it also includes an explosion-proof box, in which a controller and a display are installed. The controller is electrically connected to the moisture content detector, and the display is connected to the controller. The display is used to display the measured value of the moisture content detector.

[0014] The oil well high-flow metering device proposed in this application uses a float flow meter to measure crude oil flow. By adjusting the size of the float flow meter, the requirement for a large measurement range can be met. Furthermore, the oil well high-flow metering device proposed in this application has a simple overall structure, making it easy to install and maintain. Attached Figure Description

[0015] The preferred embodiments of this application will now be described in further detail with reference to the accompanying drawings, wherein:

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a high-flow-rate metering device for oil wells according to an embodiment of this application;

[0017] Figure 2 yes Figure 1 The structure shown is viewed from direction C.

[0018] Figure 3 This is a three-dimensional structural schematic diagram of another oil well high-flow metering device according to an embodiment of this application;

[0019] Figure 4 yes Figure 3 View of the structure shown from direction B;

[0020] Figure 5 This is a schematic diagram of the gas outlet component structure of a gas-liquid separator according to an embodiment of this application;

[0021] Figure 6 yes Figure 5 The structure shown is a cross-sectional view along AA.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100. High-flow-rate metering device for oil wells; 101. Inlet bend; 102. Gas-liquid separator; 103. Gas float flowmeter; 104. Liquid float flowmeter; 105. Moisture cut monitor; 106. Gas pipeline; 107. Outlet bend; 1021. Gas outlet; 108. Outlet straight pipe; 1081. Outlet; 1041. Inlet; 1071. First bend; 1072. Second bend; 1042. Outlet; 1011. Mixed liquid inlet; 1073. Mixed liquid outlet; 201. Skid-mounted housing ; 213, Support frame; 202, Extended inlet of mixed liquid; 203, Extended outlet of mixed liquid; 1020, Cyclone separator; 1022, First flange; 1023, Second flange; 1024, Collector; 1025, Movable chamber; 1026, Float connecting rod; 1027, Float; 1028, Plug; 209, Fixing plate; 204, Through hole; 206, Conical concave head; 207, Cavity; 210, Screen; 211, Centralizing sleeve; 2101, Vent hole; 1031, Float cavity; 1032, Float top cover. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In the following detailed description, reference can be made to the accompanying drawings, which form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to implement the technical solutions of the present application. It should be understood that other embodiments may also be utilized, or structural, logical, or electrical changes may be made to the embodiments of the present application.

[0026] This application provides a high-flow-rate metering device for oil wells, comprising: an inlet bend, a gas-liquid separator, a gas float flowmeter, a liquid float flowmeter, a water cut monitor, a gas pipeline, and an outlet bend. The inlet bend, the gas-liquid separator, and the gas pipeline are connected side-by-side. The liquid float flowmeter is positioned in the middle space between the water cut monitor and the gas-liquid separator. The inlet bend is connected to the inlet of the gas-liquid separator, and the gas outlet of the gas-liquid separator is connected to the gas pipeline. A forward-extending straight outlet pipe is provided at the outlet of the gas-liquid separator. A moisture content monitor is installed at the flange port of the pipe. An outlet is provided on the upper side of the straight outlet pipe. The liquid float flow meter is located above the straight outlet pipe. The outlet is connected to the inlet at the bottom of the liquid float flow meter. The outlet bend includes a first bend and a second bend that are connected. The first bend and the second bend have a non-circular structure. The first bend is connected to the outlet located on the side of the liquid float flow meter. The second bend is arranged side by side with the gas-liquid separator. The gas pipeline is connected to the second bend. The gas float flow meter is installed on the gas pipeline.

[0027] The oil well high-flow-rate metering device proposed in this application has a simple and compact overall structure. By arranging the inlet bend, gas-liquid separator, and gas pipeline side by side, and by placing the water cut monitor and liquid float flowmeter in front of the gas-liquid separator, the size of the oil well high-flow-rate metering device can be reduced, facilitating transportation and improving the efficiency of flow rate measurement for different oil wells. Furthermore, the structure used to measure crude oil flow rate in the oil well high-flow-rate metering device is a float flowmeter. By adjusting the dimensions of the float flowmeter, the requirements for a large measurement range can be met. Moreover, the oil well high-flow-rate metering device proposed in this application has a simple overall structure, making it easy to install and maintain.

[0028] In some embodiments of this application, optionally, the liquid inlet of the gas-liquid separator is located on the left side of the gas-liquid separator, the liquid outlet of the gas-liquid separator is located on the front side of the gas-liquid separator, and the gas outlet is located at the top of the gas-liquid separator.

[0029] Placing the outlet of the gas-liquid separator on the front side of the gas-liquid separator facilitates the installation of the water content monitor and the liquid float flow meter in the oil well high-flow metering device. This not only reduces the overall size of the oil well high-flow metering device but also makes it easier for staff to read the measurement results of the liquid float flow meter.

[0030] In some embodiments of this application, optionally, the liquid inlet of the liquid inlet bend faces the left front of the gas-liquid separator, and the liquid outlet of the liquid outlet bend faces the right front of the gas-liquid separator.

[0031] In this way, the high-flow-rate metering device for oil wells can be directly connected in series in the oil pipeline during measurement, without affecting the original transport direction of the oil pipeline, making it more convenient to use.

[0032] In some embodiments of this application, optionally, the float in the liquid float flowmeter has a conical structure, and the preset diameter of the float is greater than 45mm.

[0033] In this application, the liquid float flowmeter can be made of carbon steel Q235, stainless steel 304 / 316, or plastic PE / nylon. The angle of the tapered tube in the liquid float flowmeter is uniformly 70 degrees. Given a fixed pipe diameter, taper, and material, the measurement range can be changed by adjusting the float diameter. For example, with a pipe diameter of DN50, a taper of 70 degrees, and carbon steel Q235, when the float diameter is 48mm, the measurement range is 1-160m³. 3 / d, when the float diameter is 64mm, its measuring volume range is 40-500m. 3 / d. In this embodiment, the liquid float flowmeter is conical in shape, with a preset diameter that is the maximum diameter along the generatrix of the cone. The maximum diameter of the float is greater than 45mm, which gives the liquid float flowmeter a large measurement range.

[0034] In some embodiments of this application, optionally, the diameter of the inlet bend is greater than 100 mm. The high-flow-rate metering device for oil wells proposed in this application can achieve improved metering range and accuracy by improving the size and structure of the pipes, floats, and components.

[0035] In some embodiments of this application, optionally, the gas-liquid separator is a cyclone gas-liquid separator, which includes a cyclone separator cylinder, a first flange, a second flange, and a collector connected in sequence. The first flange, the second flange, and the collector form a movable chamber. The lower port of the cyclone separator cylinder is a sealed port, and the liquid outlet of the gas-liquid separator is located on the side near the lower port. The upper port of the cyclone separator cylinder is connected to the first flange, and the gas outlet is located at the top of the collector. A float connecting rod is inserted in the movable chamber, and a float and a plug are respectively provided at both ends of the float connecting rod. When the liquid in the gas-liquid separator flows towards the first flange, the float will cause the plug to move towards the gas outlet under the action of the liquid, and the plug will block the gas outlet.

[0036] In the embodiments of this application, the gas-liquid separator is a cyclone separator. A float is provided in the cyclone separator. If liquid flows upward and is about to flow out from the upper gas outlet, the float will float upward under the action of the liquid, thus blocking the gas outlet. At this time, neither gas nor liquid can flow out from the gas outlet, thereby achieving the effect of restricting the liquid from flowing out from the gas outlet.

[0037] In some embodiments of this application, optionally, the collector has a U-shaped structure, the port of the collector is connected to the second flange, the collector is also provided with a fixing plate, a conical concave head is fixed on the fixing plate, the conical concave head has a through hole along its center line, the gas outlet is located at the center of the arc-shaped end of the collector, the gas outlet and the through hole are connected through the cavity of the collector, and the through hole is connected to the movable chamber; the plug is a conical convex head, when the float floats, the convex head on the float connecting rod enters the through hole of the concave head, causing the through hole to be blocked.

[0038] In the cyclone separator proposed in this application embodiment, a conical concave head is provided in the collector via a fixing plate. The conical concave head has a certain length along the direction of float movement. The conical concave head and the fixing plate reduce the possibility of liquid flowing out of the gas outlet while ensuring that gas can flow out of the cyclone separator. A conical convex head is provided at the end of the float connecting rod. When the float moves upward, the convex head inserts into the through hole of the concave head, thereby closing the through hole in the gas outlet and preventing liquid from flowing out of the gas outlet. The entire structure is simple and compact, and easy to assemble.

[0039] In some embodiments of this application, the gas-liquid separator may optionally include a screen and a centralizing sleeve. The screen has an annular structure and multiple ventilation holes. The screen is embedded and fixed in the cavity of the first flange. The centralizing sleeve has a cylindrical structure and is sleeved on the outside of the float connecting rod.

[0040] The centering sleeve can restrict the movement direction of the float connecting rod, allowing the float connecting rod to move up and down along the axis of the centering sleeve. The screen can connect the first flange and the centering sleeve. In addition, since the screen has multiple vent holes, the gas escaping from the mixture can pass through the screen and flow into the gas pipe from the vent.

[0041] In some embodiments of this application, optionally, the float includes a float cavity and a float cover. The float cavity is a cylindrical structure closed at one end. The float cover is disposed on the open end of the float cavity. The float cover is detachably connected to the float cavity. The float cover is connected to the end of the float connecting rod.

[0042] In the cyclone separator of this application, the float has a cylindrical structure. If liquid flows upward, the hollow structure of the float is sensitive to the liquid. A small amount of liquid can lift the float, and the lifted float drives the convex head at the end to block the conical concave head, which can prevent the liquid from flowing out of the outlet.

[0043] In the high-flow-rate metering device for oil wells proposed in this application embodiment, the liquid mixture entering the liquid float flowmeter is an oil-water mixture. Let the flow rate of the oil-water mixture be Q, and the water content in the oil-water mixture measured by the water content detector be W. Thus, the flow rate of crude oil Q... 油 =Q*(1-W).

[0044] The implementation method and technical advantages of the high-flow-rate metering device for oil wells of this application have been described above through multiple embodiments. The structure and usage process of the high-flow-rate metering device for oil wells are described below with specific examples.

[0045] Figure 1 This is a three-dimensional structural schematic diagram of a high-flow-rate metering device for oil wells according to an embodiment of this application. Figure 2 yes Figure 1 The structure shown is viewed from direction C. Combined with... Figure 1 and Figure 2 As shown, the high-flow-rate metering device 100 for oil wells includes: an inlet bend 101, a gas-liquid separator 102, a gas float flowmeter 103, a liquid float flowmeter 104, a water cut monitor 105, a gas pipeline 106, and an outlet bend 107. The inlet bend 101, gas-liquid separator 102, and gas pipeline 106 are connected in parallel. In some embodiments of this application, optionally, the diameter of the inlet bend 101 is greater than 100 mm, allowing a large flow rate of the mixture to be measured to pass through. Further, the liquid float flowmeter 104 is disposed in the middle space between the water cut monitor 105 and the gas-liquid separator 102. The inlet bend 101 is connected to the inlet of the gas-liquid separator 102, and the gas outlet 1021 of the gas-liquid separator 102 is connected to the gas pipeline 106.

[0046] See also Figure 1 As shown, a forward-extending straight outlet pipe 108 is provided at the outlet of the gas-liquid separator 102. A moisture content monitor 105 is provided at the flange port of the straight outlet pipe 108. An outlet 1081 is provided on the upper side of the straight outlet pipe 108. A liquid float flowmeter 104 is located above the straight outlet pipe 108, and the outlet 1081 is connected to the inlet 1041 at the bottom of the liquid float flowmeter 104. In some embodiments of this application, optionally, the float in the liquid float flowmeter 104 has a conical structure, and the preset diameter of the float is greater than 45mm. The preset diameter of the float is the maximum diameter of the float along the generatrix direction. This allows the liquid float flowmeter 104 to have a large measurement range, meeting the measurement requirements of a wide range of flow rates. The liquid outlet bend 107 includes a first bend 1071 and a second bend 1072 that are connected. The first bend 1071 and the second bend 1072 have an eccentric structure. The first bend 1071 is connected to the liquid outlet 1042 located on the side of the liquid float flowmeter 104. In some embodiments, the second bend 1072 and the gas-liquid separator 102 are optionally arranged side by side, the gas pipeline 106 is connected to the second bend 1072, and the gas float flowmeter 103 is arranged on the gas pipeline 106.

[0047] See Figure 2 As shown, the liquid inlet of the gas-liquid separator 102 is located on the left side of the gas-liquid separator 102, the liquid outlet (not shown in the figure) is located on the front side of the gas-liquid separator 102, and the gas outlet 1021 is located at the top of the gas-liquid separator 102. In addition, the liquid inlet 1011 of the liquid inlet bend 101 faces the front left side of the gas-liquid separator 102, and the liquid outlet 1073 of the liquid outlet bend 107 faces the front right side of the gas-liquid separator 102.

[0048] Figure 3This is a three-dimensional structural schematic diagram of another oil well high-flow metering device according to an embodiment of this application. Figure 4 yes Figure 3 View of the structure shown from direction B. (Combined with...) Figure 1 , Figure 3 and Figure 4 As shown, the high-flow-rate metering device 100 for oil wells also includes a skid-mounted housing 201. The structure of the skid-mounted housing 201 is similar to a box structure, housing various pipelines and measuring instruments within its internal space. The skid-mounted housing 201 also includes a double door (not shown in the figure), located in front of the water cut monitor 105. Opening the double door allows observation of the measurement results from each measuring instrument within the metering device. The skid-mounted housing 201 provides protection and facilitates the transportation of the metering device. In some embodiments of this application, optionally, the high-flow-rate metering device 100 for oil wells also includes a support frame 213, a mixed liquid extended inlet 202, and a mixed liquid extended outlet 203, wherein the support frame 213 is used to fix the inlet bend 101 to the skid-mounted housing 201. One end of the extended inlet 202 of the mixed liquid is located inside the skid housing 201 and is fixedly connected to the inlet 1011 of the mixed liquid. The port of the extended inlet 202 of the mixed liquid outside the skid housing 201 is used to connect to the external pipeline to be measured. In addition, one end of the extended outlet 203 of the mixed liquid is located inside the skid housing 201 and is fixedly connected to the outlet 1073 of the mixed liquid. The port of the extended outlet 203 of the mixed liquid outside the skid housing 201 is also used to connect to the external pipeline to be measured. That is, the second oil well high flow metering device can be connected in series in the external pipeline to be measured.

[0049] Figure 5 This is a schematic diagram of the gas outlet component structure of a gas-liquid separator according to an embodiment of this application. Figure 6 yes Figure 5 The structure shown is a cross-sectional view along AA. (Combined with...) Figure 2 , Figure 5 and Figure 6As shown, the gas-liquid separator 102 is a cyclone gas-liquid separator, which includes a cyclone separator cylinder 1020, a first flange 1022, a second flange 1023, and a collector 1024 connected in sequence. The first flange 1022, the second flange 1023, and the collector 1024 form a movable chamber 1025, and the gas outlet 1021 is located at the top of the collector 1024. The lower port of the cyclone separator cylinder 1020 is a sealed port, and the upper port of the cyclone separator cylinder 1020 is connected to the first flange 1022. A float rod 1026 is inserted into the movable chamber 1025. A float 1027 and a plug 1028 are respectively provided at both ends of the float rod 1026. If the liquid in the gas-liquid separator 102 flows towards the first flange 1022, the float 1027 will cause the plug 1028 to move towards the gas outlet 1021 under the action of the liquid, and the plug 1028 will block the gas outlet 1021.

[0050] See also Figure 6 As shown, the collector 1024 has a U-shaped structure. The port of the collector 1024 is connected to the second flange 1023. The collector 1024 also has a fixing plate 209, on which a conical concave head 206 is fixed. The conical concave head 206 has a through hole 204 along its center line. A gas outlet 1021 is located at the center of the arc-shaped end of the collector 1024. The gas outlet 1021 and the through hole 204 communicate through the cavity 207 of the collector 1024. The through hole 204 is connected to the movable chamber 1025. The plug 1028 is a conical protrusion. When the float 1027 floats, the plug 1028 on the float connecting rod 1026 enters the through hole 204 of the conical concave head 206, thus blocking the through hole 204.

[0051] Furthermore, the gas-liquid separator 102 also includes a screen 210 and a centralizing sleeve 211. The screen 210 has an annular structure and multiple ventilation holes 2101 are provided on the screen 210. The screen 210 is embedded and fixed in the hollow structure of the first flange 1022. The centralizing sleeve 211 has a cylindrical structure and is sleeved on the outside of the float connecting rod 1026.

[0052] In some embodiments of this application, optionally, the float 1027 includes a float cavity 1031 and a float cover 1032. The float cavity 1031 is a cylindrical structure closed at one end, and the float cover 1032 is disposed at the lower end of the float connecting rod 1026. The float cover 1032 is detachably connected to the float cavity 1031.

[0053] The above embodiments are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art can make various changes and modifications without departing from the scope of this application. Therefore, all equivalent technical solutions should also fall within the scope of this application.

Claims

1. A high-flow-rate metering device for oil wells, characterized in that, include: The system includes an inlet bend, a gas-liquid separator, a gas float flowmeter, a liquid float flowmeter, a moisture content monitor, a gas pipeline, and an outlet bend. The inlet bend, the gas-liquid separator, and the gas pipeline are connected side-by-side. The liquid float flowmeter is positioned in the central space between the moisture content monitor and the gas-liquid separator. The liquid inlet bend is connected to the liquid inlet of the gas-liquid separator, and the gas outlet of the gas-liquid separator is connected to the gas pipeline; A straight outlet pipe extending forward is provided at the outlet of the gas-liquid separator. A moisture content monitor is provided at the flange port of the straight outlet pipe. An outlet is provided on the upper side of the straight outlet pipe. A liquid float flow meter is located above the straight outlet pipe. The outlet is connected to the liquid inlet at the bottom of the liquid float flow meter. The liquid outlet bend includes a first bend and a second bend that are connected. The first bend and the second bend have an eccentric structure. The first bend is connected to the liquid outlet located on the side of the liquid float flowmeter. The second bend is arranged side by side with the gas-liquid separator. The gas pipeline is connected to the second bend. The gas float flowmeter is installed on the gas pipeline. The liquid inlet of the gas-liquid separator is located on the left side of the gas-liquid separator, the liquid outlet of the gas-liquid separator is located on the front side of the gas-liquid separator, and the gas outlet is located at the top of the gas-liquid separator; The liquid inlet of the liquid inlet bend faces the left front of the gas-liquid separator, and the liquid outlet of the liquid outlet bend faces the right front of the gas-liquid separator. During measurement, the oil well high-flow metering device is directly connected in series with the oil pipeline through the inlet bend and the outlet bend.

2. The high-flow-rate metering device for oil wells according to claim 1, characterized in that, The float in the liquid float flowmeter has a conical structure, and the preset diameter of the float is greater than 45mm.

3. The high-flow-rate metering device for oil wells according to claim 1, characterized in that, The diameter of the liquid inlet bend is greater than 100 mm.

4. The high-flow-rate metering device for oil wells according to claim 1, characterized in that, The gas-liquid separator is a cyclone gas-liquid separator, which includes a cyclone separation cylinder, a first flange, a second flange, and a collector connected in sequence. The first flange, the second flange, and the collector form a movable chamber inside. The lower port of the cyclone separator is a sealed port, the liquid outlet of the gas-liquid separator is located on the side near the lower port, the upper port of the cyclone separator is connected to the first flange, and the gas outlet is located at the top of the collector. A float connecting rod is inserted into the movable chamber. A float and a plug are respectively provided at both ends of the float. When the liquid in the gas-liquid separator flows towards the first flange, the float will cause the plug to move towards the gas outlet under the action of the liquid, and the plug will block the gas outlet.

5. The high-flow-rate metering device for oil wells according to claim 4, characterized in that, The collector has a U-shaped structure. The port of the collector is connected to the second flange. The collector is also provided with a fixing plate. A conical concave head is fixed on the fixing plate. A through hole is opened along the center line of the concave head. The gas outlet is located at the center of the arc-shaped end of the collector. The gas outlet and the through hole are connected through the cavity of the collector. The through hole is connected to the movable chamber. The plug is a conical protrusion. When the float rises, the protrusion on the float connecting rod enters the through hole of the concave head, thus blocking the through hole.

6. The high-flow-rate metering device for oil wells according to claim 4, characterized in that, The gas-liquid separator also includes a screen and a centralizing sleeve. The screen has a ring structure and multiple ventilation holes. The screen is embedded and fixed in the hollow structure of the first flange. The centralizing sleeve has a cylindrical structure and is sleeved on the outside of the float connecting rod.

7. The high-flow-rate metering device for oil wells according to claim 3, characterized in that, The float includes a float cavity and a float cover. The float cavity is a cylindrical structure closed at one end. The float cover is placed over the open end of the float cavity. The float cover is detachably connected to the float cavity. The float cover is connected to the end of the float connecting rod.

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