Multi-sensor integrated device for real-time measurement of oil well fluid production

Abstract

The utility model belongs to oilfield measurement technical field, and disclose a kind of multi-sensor integrated device for oil well liquid production rate real-time measurement, including gas-liquid cyclone separator, the inlet end of gas-liquid cyclone separator is connected with prefiltering component, the inlet end of prefiltering component is connected with inlet steady flow buffer component, the inlet end of inlet steady flow buffer component is connected with solenoid valve, the liquid level sensor is arranged above the liquid outlet end of gas-liquid cyclone separator, the gas outlet end of gas-liquid cyclone separator is connected with gas flowmeter, the liquid outlet end of gas-liquid cyclone separator is connected with mass flowmeter, the cylindrical stainless steel woven filter screen of prefiltering component can effectively intercept sand grain, rust and other solid impurities, avoid impurity into gas-liquid cyclone separator, solenoid valve and other core components, both reduce the fault risk of valve core sticking, separator flow passage blockage, also prevent impurity covering sensor detection element and interfere with measurement.

Description

Technical Field

[0001] This utility model belongs to the field of oilfield metering technology, specifically a multi-sensor integrated device for real-time metering of oil well production. Background Technology

[0002] Real-time measurement of oil well production is a core technology for assessing oil well production capacity and dynamically adjusting operating conditions during oilfield development. Its core logic is to continuously acquire data on the total amount of oil well produced and the proportion of each phase (oil, gas, and water) through specialized equipment (especially multi-sensor integrated metering devices), providing timely information for development decisions. Oilfield multiphase flow meters are one of the mainstream devices for achieving this real-time measurement.

[0003] Chinese patent application number 202323204261.9 discloses an oilfield multiphase flow meter, including a gas-liquid cyclone separator, a gas flow meter, a mass flow meter, a solenoid valve, a liquid level sensor, and a controller. The inlet of the gas-liquid cyclone separator is connected to the mixture produced by the oil well, and the outlet of the gas-liquid cyclone separator is connected to the gas flow meter and the mass flow meter, respectively. The solenoid valve is connected to the inlet of the gas-liquid cyclone separator. The controller is electrically connected to the solenoid valve and the liquid level sensor and is installed on the gas-liquid cyclone separator. A pressure gauge is installed at the inlet of the gas-liquid cyclone separator. The liquid level sensor detects the liquid level height, and the pressure gauge monitors the pressure of the mixture produced by the oil well. The controller sends an electrical signal to the solenoid valve, causing the solenoid valve to adjust the valve opening size. This avoids the gas outlet pipe being flooded and regulates the inflow pressure of the mixture produced by the oil well, improving the problem that the gas flow meter cannot detect the separated gas when the input of the oil-gas-water mixture is too large or too small.

[0004] However, the above-mentioned multiphase flow meters in oil fields have the following shortcomings in actual use: 1. Solid impurities such as sand and rust mixed in the oil well products can easily enter the core components such as gas-liquid cyclone separators and solenoid valves, which can easily cause valve core jamming and separator flow channel blockage, greatly shortening the equipment maintenance cycle, and can also cover the sensor detection elements, interfering with the accuracy of the measurement data; 2. The oil-gas-water mixture produced by oil wells is often in a pulsating and turbulent flow state. After entering the separator directly, it will not only reduce the gas-liquid separation efficiency, but also cause the flow and pressure parameters to fluctuate drastically, further amplifying the measurement error.

[0005] Therefore, a multi-sensor integrated device for real-time measurement of oil well production is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a multi-sensor integrated device for real-time measurement of oil well production, which has the advantages of effectively intercepting impurities in oil well products, reducing wear and tear on core components to extend maintenance cycles, and simultaneously streamlining turbulent flow patterns, improving gas-liquid separation efficiency and the accuracy of real-time production measurement.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-sensor integrated device for real-time measurement of oil well production, comprising a gas-liquid cyclone separator, wherein a pre-filter assembly is connected to the inlet end of the gas-liquid cyclone separator, an inlet flow stabilizing buffer assembly is connected to the inlet end of the pre-filter assembly, a solenoid valve is connected to the inlet end of the inlet flow stabilizing buffer assembly, a liquid level sensor is disposed above the liquid outlet end of the gas-liquid cyclone separator, a gas flow meter is connected to the gas outlet end of the gas-liquid cyclone separator, and a mass flow meter is connected to the liquid outlet end of the gas-liquid cyclone separator.

[0008] Preferably, the pre-filter assembly includes a cylindrical outer shell, and a filter structure is disposed inside the cylindrical outer shell.

[0009] Preferably, the cylindrical outer shell includes a front shell and a rear shell. The outer side of the mating surface of the front shell and the rear shell is provided with a positioning protrusion ring. Two symmetrically arranged fastening rings are provided on the outer side of the positioning protrusion ring. The fastening rings are connected by fixing bolts.

[0010] Preferably, the filter structure includes a cylindrical stainless steel woven filter screen located inside the rear housing. A fixing ring is fixedly connected to the open end of the cylindrical stainless steel woven filter screen. A limiting ring is fixed at a position corresponding to the fixing ring on the inner wall of the rear housing. A first magnet block and a second magnet block are respectively embedded on the contact surface between the fixing ring and the limiting ring.

[0011] Preferably, the limiting ring has evenly distributed positioning holes, and the fixing ring has a positioning post fixed at a position corresponding to the positioning hole, the positioning post extending into the positioning hole.

[0012] Preferably, the inlet flow stabilizing buffer assembly includes a flow stabilizing housing, and a plurality of equally spaced annular guide plates are disposed inside the flow stabilizing housing.

[0013] Preferably, a controller is installed on the front outer wall of the gas-liquid cyclone separator, and the controller is electrically connected to the solenoid valve and the liquid level sensor.

[0014] Preferably, a pressure gauge and a temperature gauge are installed at the inlet end of the gas-liquid cyclone separator.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The cylindrical stainless steel woven filter screen of the pre-filter assembly of this utility model can effectively intercept solid impurities such as sand and rust, preventing impurities from entering core components such as gas-liquid cyclone separators and solenoid valves. This reduces the risk of valve core jamming and separator flow channel blockage, and also prevents impurities from covering sensor detection elements and interfering with measurement. At the same time, the split quick-release structure and magnetic positioning design of this assembly allow filter screen replacement without disassembling pipeline flanges, which is suitable for the needs of rapid field operations in oil fields and greatly extends the maintenance cycle of the equipment. 2. The multiple sets of equidistant annular guide plates in the inlet flow stabilization buffer assembly of this utility model can regulate the pulsating and turbulent fluid flow, reduce its impact and stabilize the internal flow field of the gas-liquid cyclone separator, effectively improving the gas-liquid separation efficiency. At the same time, the stable fluid state also reduces the fluctuation of flow and pressure parameters. Combined with the collaborative monitoring of multiple sensors, it significantly improves the accuracy of real-time production measurement, providing more reliable real-time data for oil well condition adjustment and oilfield development decision-making. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the pre-filter assembly of this utility model; Figure 3 This is a schematic diagram of the fixing ring of this utility model from another angle; Figure 4 This utility model Figure 2 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the inlet current stabilization buffer assembly of this utility model.

[0017] In the picture: 1. Gas-liquid cyclone separator; 2. Pre-filter assembly; 21. Cylindrical outer shell; 211. Front housing; 212. Rear housing; 213. Positioning protrusion ring; 214. Fastening clamp; 215. Fixing bolt; 22. Filter structure; 221. Cylindrical stainless steel woven filter screen; 222. Fixing ring; 223. Limiting ring; 224. First magnet block; 225. Second magnet block; 226. Positioning hole; 227. Positioning post; 3. Inlet current stabilization buffer component; 31. Flow-stabilizing casing; 32. Annular guide vane; 4. Solenoid valve; 5. Liquid level sensor; 6. Gas flow meter; 7. Mass flow meter; 8. Controller; 9. Pressure gauge; 10. Temperature gauge. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1 to 5 As shown, this utility model provides a multi-sensor integrated device for real-time measurement of oil well production, including a gas-liquid cyclone separator 1. A pre-filter assembly 2 is connected to the inlet end of the gas-liquid cyclone separator 1 to intercept solid impurities such as sand and rust in the oil well production, protecting subsequent core components. An inlet flow stabilizing buffer assembly 3 is connected to the inlet end of the pre-filter assembly 2 to regulate the fluid flow pattern, reduce pulsation impact, and improve the stability of subsequent separation and measurement. A solenoid valve 4 is connected to the inlet end of the inlet flow stabilizing buffer assembly 3 to adjust the inflow pressure of the mixture and prevent the gas outlet pipe from being submerged. A liquid level sensor 5 is installed above the liquid outlet end of the gas-liquid cyclone separator 1 to detect the liquid level height in the separator in real time, providing a signal basis for solenoid valve adjustment. A gas flow meter 6 is connected to the gas outlet end of the gas-liquid cyclone separator 1 to accurately measure the flow rate of the separated gas. A mass flow meter 7 is connected to the liquid outlet end of the gas-liquid cyclone separator 1 to accurately measure the flow rate of the separated liquid, providing basic data for production calculation.

[0020] Specifically, the pre-filter assembly 2 includes a cylindrical shell 21, which provides installation and protection space for the filter structure. The material is oil-resistant and corrosion-resistant 316L stainless steel, which is suitable for complex working conditions in oil fields. The filter structure 22, the core filtration component, is installed inside the cylindrical shell 21 to separate solid impurities from the fluid.

[0021] Furthermore, the cylindrical outer shell 21 includes a front shell 211 and a rear shell 212. The split design facilitates disassembly and replacement of the filter screen. The outer side of the mating surface of the front shell 211 and the rear shell 212 are provided with positioning protrusions 213 for quick alignment of the front and rear shells to ensure connection sealing. Two symmetrically arranged fastening rings 214 are provided on the outer side of the positioning protrusions 213. The fastening rings 214 are connected by fixing bolts 215 and fixed by clamps. Compared with traditional multi-bolt flanges, they can be quickly disassembled and assembled, shortening maintenance time.

[0022] Furthermore, the filter structure 22 includes a cylindrical stainless steel woven filter screen 221 located inside the rear housing 212. It adopts a three-dimensional woven structure, and its filtration area is 3-5 times that of a planar filter screen of the same diameter. The filter screen pore size is 50-100μm, which takes into account both filtration efficiency and flowability. The open end of the cylindrical stainless steel woven filter screen 221 is fixedly connected to a fixing ring 222 for fixing the filter screen body and improving structural stability. The inner wall of the rear housing 212 is fixed with a limit ring 223 at the position corresponding to the fixing ring 222 to limit the axial movement of the filter screen assembly and prevent displacement due to fluid impact. The contact surfaces of the fixing ring 222 and the limit ring 223 are respectively embedded with a first magnet block 224 and a second magnet block 225, which are fixed by magnetic attraction to enhance the installation firmness of the filter screen and facilitate disassembly.

[0023] It is worth noting that the limiting ring 223 has evenly distributed positioning holes 226, and the fixing ring 222 has a positioning post 227 fixed at the position corresponding to the positioning hole 226. The positioning post 227 extends into the positioning hole 226 to achieve precise positioning of the filter assembly, avoid installation misalignment that could lead to filter failure, and prevent the filter from being installed backwards.

[0024] It is worth noting that the inlet flow stabilization buffer assembly 3 includes a flow stabilization shell 31, which provides an installation carrier for the guide plate. The shell has sufficient buffer volume to reduce fluid pulsation. The flow stabilization shell 31 is provided with multiple equally spaced annular guide plates 32, which divide the turbulent fluid into multiple parallel channels, force the fluid to flow uniformly along the guide, and eliminate eddies and impact flows.

[0025] It is worth mentioning that a controller 8 is installed on the front outer wall of the gas-liquid cyclone separator 1. The core control unit integrates data processing and command output functions. The controller 8 is electrically connected to the solenoid valve 4 and the liquid level sensor 5. It receives the detection signal from the liquid level sensor and adjusts the opening of the solenoid valve in real time to maintain a stable liquid level in the separator.

[0026] It is worth emphasizing that a pressure gauge 9 and a temperature gauge 10 are installed at the inlet end of the gas-liquid cyclone separator 1. The pressure gauge 9 is used to monitor the inflow pressure of the mixture, and the temperature gauge 10 is used to collect fluid temperature data. The two work together to provide parameter correction basis for flow measurement and improve the accuracy of measurement.

[0027] Among them, the gas-liquid cyclone separator 1, solenoid valve 4, liquid level sensor 5, gas flow meter 6, mass flow meter 7, controller 8, pressure gauge 9, and temperature gauge 10 are existing technologies and will not be described in detail; at the same time, this utility model also includes power supply and switch, etc., which are not the main technical points of this patent and will not be described in detail.

[0028] Working principle and process: The oil, gas and water mixture produced by the oil well first enters the inlet flow stabilizing buffer component 3 through the solenoid valve 4. Multiple equidistant annular guide plates 32 inside the flow stabilizing shell 31 organize the pulsating and turbulent fluid into a uniform flow state. After weakening the impact, the fluid flows into the pre-filter component 2. The cylindrical stainless steel woven filter screen 221 inside the cylindrical shell 21 intercepts solid impurities such as sand and rust. It is precisely positioned by the positioning post 227 and positioning hole 226 of the fixing ring 222 and the limiting ring 223, and is magnetically fixed by the first magnet block 224 and the second magnet block 225 to ensure stable filtration. Fluid enters the gas-liquid cyclone separator 1 for gas-liquid separation. Pressure gauge 9 and temperature gauge 10 at the inlet of the gas-liquid cyclone separator 1 collect fluid pressure and temperature data respectively. Liquid level sensor 5 above the liquid outlet detects the liquid level height in the separator in real time. After receiving the signals from liquid level sensor 5 and pressure gauge 9, controller 8 sends a command to solenoid valve 4 to adjust the valve opening to prevent the gas outlet pipe from being submerged. The separated gas is measured by gas flow meter 6 and the liquid is measured by mass flow meter 7. Finally, through the coordination of multi-sensor data, the real-time and accurate measurement of oil well production and the proportion of each phase is achieved.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-sensor integrated device for real-time measurement of oil well production, comprising a gas-liquid cyclone separator (1), characterized in that: The inlet end of the gas-liquid cyclone separator (1) is connected to a pre-filter assembly (2), the inlet end of the pre-filter assembly (2) is connected to an inlet flow stabilizing buffer assembly (3), the inlet end of the inlet flow stabilizing buffer assembly (3) is connected to a solenoid valve (4), a liquid level sensor (5) is installed above the liquid outlet end of the gas-liquid cyclone separator (1), a gas flow meter (6) is connected to the gas outlet end of the gas-liquid cyclone separator (1), and a mass flow meter (7) is connected to the liquid outlet end of the gas-liquid cyclone separator (1).

2. The multi-sensor integrated device for real-time measurement of oil well production as described in claim 1, characterized in that: The pre-filter assembly (2) includes a cylindrical shell (21) and a filter structure (22) is provided inside the cylindrical shell (21).

3. The multi-sensor integrated device for real-time measurement of oil well production as described in claim 2, characterized in that: The cylindrical outer shell (21) includes a front shell (211) and a rear shell (212). The outer side of the mating surface of the front shell (211) and the rear shell (212) are provided with positioning protrusions (213). Two symmetrically arranged fastening rings (214) are provided on the outer side of the positioning protrusions (213). The fastening rings (214) are connected by fixing bolts (215).

4. The multi-sensor integrated device for real-time measurement of oil well production as described in claim 3, characterized in that: The filter structure (22) includes a cylindrical stainless steel woven filter (221) located in the rear housing (212). A fixing ring (222) is fixedly connected to the open end of the cylindrical stainless steel woven filter (221). A limiting ring (223) is fixed at the position corresponding to the fixing ring (222) on the inner wall of the rear housing (212). A first magnet block (224) and a second magnet block (225) are respectively embedded on the contact surface of the fixing ring (222) and the limiting ring (223).

5. The multi-sensor integrated device for real-time measurement of oil well production as described in claim 4, characterized in that: The limiting ring (223) has evenly distributed positioning holes (226), and the fixing ring (222) has a positioning post (227) fixed at the position corresponding to the positioning hole (226), and the positioning post (227) extends into the positioning hole (226).

6. The multi-sensor integrated device for real-time measurement of oil well production as described in claim 1, characterized in that: The inlet flow stabilizing buffer assembly (3) includes a flow stabilizing shell (31), and a plurality of equally spaced annular guide plates (32) are provided inside the flow stabilizing shell (31).

7. The multi-sensor integrated device for real-time measurement of oil well production as described in claim 1, characterized in that: A controller (8) is installed on the front outer wall of the gas-liquid cyclone separator (1), and the controller (8) is electrically connected to the solenoid valve (4) and the liquid level sensor (5).

8. The multi-sensor integrated device for real-time measurement of oil well production as described in claim 1, characterized in that: The inlet end of the gas-liquid cyclone separator (1) is equipped with a pressure gauge (9) and a temperature gauge (10).

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