Cyclone separation type multiphase flow metering device

Abstract

The utility model relates to a cyclone separation type multiphase flow metering device, which belongs to the technical field of gas-liquid separators and comprises a cyclone separator, and a detection device for metering and detecting multiphase flow is arranged on the outer side of the cyclone separator. The detection device comprises a linkage valve controller fixedly connected to the upper side of the cyclone separator, a double-flange differential pressure liquid level meter fixedly connected to the side face of the cyclone separator and a gas differential pressure transmitter fixedly connected to the right end of the upper side of the cyclone separator. According to the cyclone separation type multiphase flow metering device, the gas-liquid outlet valve position is controlled through the linkage valve, then the liquid level of the cyclone separator is controlled, the cyclone separator is in a relatively stable state, the optimal separation effect is achieved, then the liquid flow is metered through the combination of the floating target flowmeter and the double-flange differential pressure transmitter, and the metering efficiency is improved. The gas flow is metered through the gas differential pressure transmitter and the temperature and pressure transmitter.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separators, and particularly relates to a cyclone separation type multiphase flow metering device. Background Technique

[0002] During the liquid production process of oil wells, it is necessary to carry out oil-gas gathering and transportation treatment, separation type multiphase metering on crude oil, and separate the gas-liquid mixture during the oil and gas production process. And the accurate metering of the oil well produced fluid is an important basis for the dynamic analysis of oilfield development. Through real-time metering data, it can provide reference for production management and formulate reasonable development plans. At the same time, it is also an important basis for scientifically and reasonably assessing the completion of production tasks of each level of units and timely and comprehensively grasping the production capacity dynamics of blocks.

[0003] The existing cyclone separation type multiphase flow metering device uses a parallel connection method of multiple tube cyclone separators. A communicating vessel structure is formed between multiple tubular separators. However, when the gas-liquid volume is large, the gas-liquid flow rate in the tube is too fast. Before the gas-liquid in the 4 separators reaches the liquid level balance, it will flow out of the separator. And only one of the 4 separators is equipped with a liquid level transmitter. It is very easy to have the situation of gas path liquid leakage or liquid path gas leakage in the left 3 separators. The liquid volume is measured by a mass flowmeter, and the mass flowmeter requires that the liquid does not contain gas. However, due to the volume limitation of the tubular cyclone separator, the gas-liquid separation time is short. In many oil wells with low water cut, the gas-liquid cannot be quickly separated in a short time. The separated liquid actually exists in the form of bubble flow, that is, small bubbles are wrapped in the liquid. This kind of liquid mass flowmeter cannot be used. The liquid level data is measured by a magnetic flap liquid level gauge. A major drawback of the magnetic flap liquid level gauge is that it is easily blocked by viscous oil and is not convenient to maintain. A regulating valve is installed on the gas path and the liquid path respectively to adjust the gas-liquid outflow speed and thus control the liquid level. However, when the two regulating valves are simultaneously closed due to system failure or valve itself failure, the system will be blocked, and the incoming liquid pressure cannot be released, and serious accidents may occur. Therefore, a cyclone separation type multiphase flow metering device is proposed to solve the problems raised above. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a cyclone separation type multiphase flow metering device, which has the advantages of wide adaptability, high precision, and can measure the three phases of oil, gas, and water in the oil well output. It solves the problem that the cyclone separation type multiphase flow metering device uses a parallel connection method of multiple tube cyclone separators, and a communicating vessel structure is formed between multiple tubular separators. However, when the gas-liquid volume is large, the gas-liquid flow rate in the tube is too fast. Before the gas-liquid in the 4 separators reaches the liquid level balance, it will flow out of the separator. And there is only one liquid level transmitter installed in the 4 separators. It is easy to occur the situation of gas channel liquid leakage or liquid channel gas leakage in the left 3 separators. The liquid volume is measured by a mass flowmeter, and the mass flowmeter requires that the liquid does not contain gas. However, due to the volume limitation of the tubular cyclone separator, the gas-liquid separation time is short. In many oil wells with low water cut, the gas-liquid cannot be quickly separated in a short time. The separated liquid actually exists in the form of bubble flow, that is, small bubbles are wrapped in the liquid. This kind of liquid mass flowmeter cannot be used. The liquid level data is measured by a magnetic flap liquid level gauge. One major drawback of the magnetic flap liquid level gauge is that it is easy to be blocked by viscous oil and is not convenient for maintenance. A regulating valve is installed in the gas path and the liquid path respectively to regulate the gas-liquid outflow speed, thereby controlling the liquid level. However, when the two regulating valves are simultaneously closed due to system failure or valve itself failure, the system will be blocked, and the incoming liquid pressure cannot be released, which may cause serious accidents.

[0005] To achieve the above object, the utility model provides the following technical solution: A cyclone separation type multiphase flow metering device, including a cyclone separator, characterized in that: a detection device for multiphase flow metering detection is arranged outside the cyclone separator;

[0006] The detection device includes a linkage valve controller fixedly connected to the upper side of the cyclone separator, a double flange differential pressure liquid level gauge fixedly connected to the side of the cyclone separator, a gas differential pressure transmitter fixedly connected to the upper right end of the cyclone separator, a temperature transmitter fixedly connected to the right side of the gas differential pressure transmitter, a pressure transmitter fixedly connected to the right side of the temperature transmitter, a water cut analyzer fixedly connected to the lower right end of the cyclone separator, a floating target flowmeter fixedly connected to the upper right side of the water cut analyzer, a double flange differential pressure transmitter fixedly connected between the water cut analyzer and the floating target flowmeter, and a control device for liquid level control arranged inside the linkage valve controller;

[0007] The control device includes a controller fixedly connected inside the linkage valve controller, a motor fixedly connected to the lower side of the controller, a gas path valve fixedly connected to the output end of the motor, a gas path outlet communicated to the right side of the gas path valve, a connecting rod fixedly connected to the lower side of the gas path valve, a liquid path valve fixedly connected to the lower side of the connecting rod, and a liquid path outlet communicated to the right side of the liquid path valve.

[0008] Furthermore, an explosion-proof control box is installed on the outer bracket of the cyclone separator, and the explosion-proof control box is independent of the outer brackets of the cyclone separator and the pipeline.

[0009] Furthermore, the output end of the explosion-proof control box is electrically connected to the output end of the linkage valve.

[0010] Furthermore, the output end of the linkage valve is electrically connected to the output end of the double-flange differential pressure level gauge.

[0011] Furthermore, the output ends of the temperature transmitter, the linkage valve controller, the pressure transmitter, the gas differential pressure transmitter, the float target flowmeter, the double-flange differential pressure transmitter and the water cut analyzer are all electrically connected to the output end of the explosion-proof control box.

[0012] Furthermore, the output shaft of the motor penetrates through the upper side of the cyclone separator and extends into the interior.

[0013] Furthermore, the gas differential pressure transmitter, the temperature transmitter and the pressure transmitter are fixedly installed in a horizontal arrangement.

[0014] Compared with the prior art, the present utility model provides a cyclone separation type multiphase flow metering device, which has the following beneficial effects:

[0015] 1. For the cyclone separation type multiphase flow metering device, the liquid-gas outlet valve position is controlled by the linkage valve, and then the liquid level of the cyclone separator is controlled to be in a relatively stable state to achieve the best separation effect. Then, the liquid flow is measured by the float target flowmeter in combination with the double-flange differential pressure transmitter, and the gas flow is measured by the gas differential pressure transmitter and the temperature and pressure transmitters.

[0016] 2. This cyclone separation type multiphase flow metering device separates through a single cyclone separator instead of the method of parallel connection of multiple cyclone separators. The double flange differential pressure transmitter can reflect the true liquid level of the cyclone separator in real time, avoiding the situation of gas-liquid intermixing caused by the imbalance of liquid levels between different cyclone separators in a short time. The liquid volume is measured by a floating target flowmeter, which can effectively avoid the problem that when the separation time is short and the gas-liquid separation is incomplete, the liquid contains gas and the mass flowmeter cannot be used. The gas differential pressure transmitter measures the gas flow rate and is not affected by gas humidity. The gas-liquid outlet adopts a linkage valve design, effectively avoiding pressure buildup, and has high safety and reliability. It solves the problem that the cyclone separation type multiphase flow metering device uses a parallel connection method of multiple tube cyclone separators, forming a communicating vessel structure between multiple tubular separators. However, when the gas-liquid volume is large, the gas-liquid flow rate in the tube is too fast. Before the gas-liquid entering the 4 separators reaches the liquid level balance, it will flow out of the separators. And there is only one liquid level transmitter installed in the 4 separators. It is very easy to have the situation of gas path liquid intermixing or liquid path gas intermixing in the 3 separators on the left. The liquid volume is measured by a mass flowmeter, and the mass flowmeter requires that the liquid does not contain gas. However, due to volume limitations of the tubular cyclone separator, the gas-liquid separation time is short. In many oil wells with low water cut, the gas-liquid cannot be quickly separated in a short time. The separated liquid actually exists in the form of bubble flow, that is, small bubbles are wrapped in the liquid. This kind of liquid cannot be measured by a mass flowmeter. The liquid level data is measured by a magnetic flap liquid level gauge. One major drawback of the magnetic flap liquid level gauge is that it is easily blocked by viscous oil and is not convenient for maintenance. A regulating valve is installed on the gas path and the liquid path respectively to adjust the gas-liquid outflow speed and thus control the liquid level. However, when the two regulating valves are simultaneously closed due to system failure or valve itself failure, the system will be blocked, and the incoming liquid pressure cannot be released, which may lead to serious accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is an internal structural schematic diagram of the linkage valve controller of the present utility model;

[0019] Figure 3 is a top view of the gas-liquid outlet pipeline of the separator of the present utility model;

[0020] Figure 4 is a schematic diagram of the liquid level control logic of the present utility model;

[0021] Figure 5 is a flow chart of the separator liquid level control of the present utility model;

[0022] Figure 6 is a three-dimensional structure diagram of the connecting rod of the present utility model.

[0023] In the figure: 1 is a cyclone separator, 2 is a water content analyzer, 3 is a floating target flowmeter, 4 is a gas differential pressure transmitter, 5 is a temperature transmitter, 6 is a pressure transmitter, 7 is a double flange differential pressure liquid level gauge, 8 is a double flange differential pressure transmitter, 9 is a linkage valve controller, 10 is an explosion-proof control box, 11 is a linkage valve, 12 is a controller, 13 is a motor, 14 is a liquid path outlet, 15 is a gas path valve, 16 is a liquid path valve, 17 is a connecting rod, 18 is a gas path outlet. Specific implementation mode

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1-6 , a cyclone separation type multiphase flow metering device in this embodiment, includes a cyclone separator 1, and is characterized in that: a detection device for metering and detecting multiphase flow is arranged outside the cyclone separator 1. The detection device includes a linkage valve controller 9 fixedly connected to the upper side of the cyclone separator 1, a double flange differential pressure liquid level gauge 7 fixedly connected to the side of the cyclone separator 1, a gas differential pressure transmitter 4 fixedly connected to the upper right end of the cyclone separator 1, a temperature transmitter 5 fixedly connected to the right side of the gas differential pressure transmitter 4, a pressure transmitter 6 fixedly connected to the right side of the temperature transmitter 5, a water content analyzer 2 fixedly connected to the lower right end of the cyclone separator 1, a floating target flowmeter 3 fixedly connected to the upper right side of the water content analyzer 2, a double flange differential pressure transmitter 8 fixedly connected between the water content analyzer 2 and the floating target flowmeter 3, and a control device for liquid level control arranged inside the linkage valve controller 9. The control device includes a controller 12 fixedly connected inside the linkage valve controller 9, a motor 13 fixedly connected to the lower side of the controller 12, a gas path valve 15 fixedly connected to the output end of the motor 13, a gas path outlet 18 communicated with the right side of the gas path valve 15, a connecting rod 17 fixedly connected to the lower side of the gas path valve 15, a liquid path valve 16 fixedly connected to the lower side of the connecting rod 17, and a liquid path outlet 14 communicated with the right side of the liquid path valve 16.

[0026] Among them, an explosion-proof control box 10 is installed on the outer bracket of the cyclone separator 1. The explosion-proof control box 10 is independent of the outer brackets of the cyclone separator 1 and the pipeline. The output end of the explosion-proof control box 10 is electrically connected to the output end of the linkage valve 11. The output end of the linkage valve 11 is electrically connected to the output end of the double flange differential pressure liquid level gauge 7. The output ends of the temperature transmitter 5, the linkage valve controller 9, the pressure transmitter 6, the gas differential pressure transmitter 4, the floating target flowmeter 3, the double flange differential pressure transmitter 8, and the water content analyzer 2 are all electrically connected to the output end of the explosion-proof control box 10. The output shaft of the motor 13 penetrates through the upper side of the cyclone separator 1 and extends into the interior. The gas differential pressure transmitter 4, the temperature transmitter 5, and the pressure transmitter 6 are horizontally arranged and fixedly installed.

[0027] It should be noted that the cyclone separator 1 is not a simple pipeline structure. It integrates a set of linkage valves 11 inside, and the controller 12 of the linkage valve 11 is at the top. The cyclone separator 1 and the linkage valve 11 inside it are designed together. The explosion-proof control box 10 is the control center of the whole set of equipment. The explosion-proof control box 10 integrates various electrical components required for the operation of the whole system, such as transformers, switching power supplies, data acquisition modules, touch screens, and communication modules. Each instrument or device used in the system, such as the temperature transmitter 5, the linkage valve controller 9, and the water content analyzer 2, is connected to the explosion-proof control box 10 through cables. The explosion-proof control box 10 supplies power to each device on the one hand, and on the other hand, collects data from each instrument or controls each device. The single-tube cyclone separation method is used to separate gas and liquid from the mixed-phase medium. When measuring the liquid level, the floating target flowmeter 3 combined with the double flange differential pressure transmitter 8 can be used to measure the liquid flow. The floating target flowmeter 3 uses the volumetric measurement method. Even if there is a small amount of gas in the liquid, it can still accurately measure. Combining with the double flange differential pressure transmitter 8 to measure the liquid density, the mass flow rate of the liquid can be accurately measured. When measuring the gas volume, the gas differential pressure transmitter 4 can be used, combined with the pressure and temperature transmitters 5 to measure the gas flow.

[0028] The working principle of the above embodiment is as follows:

[0029] The linkage valve 11 simultaneously controls the outlet valve positions of the gas circuit and the liquid circuit. When the outlet of the gas circuit decreases, the outlet of the liquid circuit increases, and vice versa. The system judges the liquid level inside the cyclone separator 1 through the value of the double-flange differential pressure liquid level gauge 7, and simultaneously controls the linkage valve 11 in the cyclone separator 1, that is, controls the gas-liquid outlet valve positions of the cyclone separator 1, and further controls the liquid level inside the cyclone separator 1. Since the gas-liquid outlet valve of the cyclone separator 1 is the linkage valve 11, when the liquid circuit is increased, the gas circuit is decreased at the same time. Similarly, when the gas circuit is increased, the liquid circuit is decreased at the same time. Each time the liquid circuit or the gas circuit is increased, the linkage valve 11 rotates in a certain direction. For example, when the valve rotates clockwise, the liquid circuit increases and the gas circuit decreases. Then, when the valve rotates counterclockwise, the liquid circuit decreases and the gas circuit increases. When the liquid circuit increases, the liquid level of the cyclone separator 1 will drop. When the gas circuit increases, the liquid level of the cyclone separator 1 will rise.

[0030] The electrical components mentioned in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer for control, and the existing publicly disclosed electrical connection technologies are not described in detail in the text.

[0031] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cyclone separation type multiphase flow metering device, comprising a cyclone separator (1), characterized in that: A detection device for metering and detecting multiphase flow is arranged outside the cyclone separator (1). The detection device includes a linkage valve controller (9) fixedly connected to the upper side of the cyclone separator (1), a double-flange differential pressure liquid level gauge (7) fixedly connected to the side of the cyclone separator (1), a gas differential pressure transmitter (4) fixedly connected to the right end of the upper side of the cyclone separator (1), a temperature transmitter (5) fixedly connected to the right side of the gas differential pressure transmitter (4), a pressure transmitter (6) fixedly connected to the right side of the temperature transmitter (5), a water cut analyzer (2) fixedly connected to the right end of the lower side of the cyclone separator (1), a floating target flowmeter (3) fixedly connected to the upper right side of the water cut analyzer (2), a double-flange differential pressure transmitter (8) fixedly connected between the water cut analyzer (2) and the floating target flowmeter (3), and a control device for liquid level control arranged inside the linkage valve controller (9). The control device includes a controller (12) fixedly connected inside the linkage valve controller (9), a motor (13) fixedly connected to the lower side of the controller (12), a gas path valve (15) fixedly connected to the output end of the motor (13), a gas path outlet (18) communicated with the right side of the gas path valve (15), a connecting rod (17) fixedly connected to the lower side of the gas path valve (15), a liquid path valve (16) fixedly connected to the lower side of the connecting rod (17), and a liquid path outlet (14) communicated with the right side of the liquid path valve (16).

2. The swirl separation type multiphase flow metering device according to claim 1, wherein: An explosion-proof control box (10) is installed on the outer bracket of the cyclone separator (1), and the explosion-proof control box (10) is independent of the outer bracket of the cyclone separator (1) and the pipeline.

3. The swirl separation type multiphase flow metering device according to claim 2, characterized in that: The output end of the explosion-proof control box (10) is electrically connected to the output end of the linkage valve (11).

4. The swirl separation type multiphase flow metering device according to claim 3, characterized in that: The output end of the linkage valve (11) is electrically connected to the output end of the double-flange differential pressure liquid level gauge (7).

5. The swirl separation type multiphase flow metering device according to claim 1, characterized in that: The output ends of the temperature transmitter (5), the linkage valve controller (9), the pressure transmitter (6), the gas differential pressure transmitter (4), the floating target flowmeter (3), the double-flange differential pressure transmitter (8), and the water cut analyzer (2) are all electrically connected to the output end of the explosion-proof control box (10).

6. The swirl separation type multiphase flow metering device according to claim 1, wherein: The output shaft of the motor (13) penetrates through the upper side of the cyclone separator (1) and extends to the inside.

7. The swirl separation type multiphase flow metering device according to claim 1, wherein: The gas differential pressure transmitter (4), the temperature transmitter (5), and the pressure transmitter (6) are fixedly installed in a horizontal arrangement.

Images