Skid-mounted oil well intelligent metering system

Abstract

The utility model discloses a skid-mounted oil well intelligent metering system, and relates to the technical field of oil and gas conveying metering, the input end and the output end of a filter are respectively connected with an inductor, the inductors are connected with a PLC control cabinet, the PLC control cabinet compares the values of the inductors at the input end and the output end to judge whether the filter is blocked or not, and if the filter is blocked, the PLC control cabinet is connected with the PLC control cabinet. When the PLC control cabinet detects that input and output flow velocity values or pressure values do not change, it means that the filter is not blocked, and the detection value of the mass flow meter is normal data, and when the input and output values detected by the PLC control cabinet change, the detection value of the mass flow meter is wrong data, and the data is abandoned, the filter needs to be opened, and the filter is not blocked. The solid loading object is taken out, and the mass flow meter is used for re-detection, so that the detection data of the mass flow meter has no error, and the technical problem that the flow meter on the existing oil well metering system is influenced by the solid loading object and the detection numerical value of the flow meter has error is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil and gas conveying measurement, and particularly relates to a skid-mounted oil well intelligent measurement system. BACKGROUND

[0002] Oil well output is generally four-phase medium, namely crude oil, sewage, natural gas and silt. Due to different mining methods, the temperature and pressure of the produced material are different after being discharged from the wellhead, but the produced material exists in the form of a mixture; in order to understand the quantity of the produced material of each oil well, it is necessary to measure the crude oil, sewage and natural gas. However, the produced material does not exist in a separate state, and the phenomena of gas containing liquid, liquid containing gas, water-in-oil and oil-in-water are common, so it is difficult to effectively measure the liquid quantity and gas.

[0003] The oil well contains solid objects such as silt, which seriously affects the flow meter on the oil well measurement system, resulting in errors in the detection value of the flow meter. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the above background art, the utility model provides a skid-mounted oil well intelligent measurement system, which solves the technical problem that the flow meter on the existing oil well measurement system is affected by solid objects and the detection value of the flow meter is incorrect.

[0005] The technical scheme of the utility model is achieved as follows: a skid-mounted oil well intelligent metering system, which comprises a gas conveying pipe connected to a gas outlet of a separator, a liquid conveying pipe connected to a liquid outlet of the separator and a PLC control cabinet, a gas turbine flowmeter is connected to the gas conveying pipe, a filter, a mass flowmeter and a water content analyzer are sequentially connected to the liquid conveying pipe, the filter, the mass flowmeter and the water content analyzer are sequentially arranged along the flowing direction of liquid, an inductor is connected to the input end and the output end of the filter respectively, and the gas turbine flowmeter, the mass flowmeter, the water content analyzer and the inductors are connected to the PLC control cabinet respectively.

[0006] The gas turbine flowmeter measures the flow of gas in the gas conveying pipe, the mass flowmeter measures the flow of liquid in the liquid conveying pipe, and the water content analyzer measures the water content in the liquid, wherein the PLC control cabinet comprises a display part and a control part, the display part is a display screen, and the control part is a controller; the gas turbine flowmeter, the mass flowmeter, the water content analyzer and the inductors are connected to the PLC control cabinet respectively, and the values detected by the gas turbine flowmeter, the mass flowmeter, the water content analyzer and the inductors are displayed on the display screen of the PLC control cabinet.

[0007] Preferably, the input end of the filter is provided with an emergency shut-off valve connected with the PLC control cabinet. When the PLC control cabinet detects changes in the input and output flow rate values or pressure values, it means that the filter is clogged, and the mass flow meter detects false data, which is invalid. At this time, the PLC control cabinet controls the emergency shut-off valve to close, so that the infusion tube stops delivering liquid to the filter. Then the filter can be opened, and the solid objects clogging the filter can be poured out. Then the emergency shut-off valve is opened again by the PLC control cabinet, and the mass flow meter is re-detected to ensure that the mass flow meter detection data is correct.

[0008] Preferably, the filter is a multi-bag filter. Because the multi-bag filter uses multiple filter bags, the total filter area is large, which is suitable for processing a large amount of fluid or requiring high purification degree, and the individual filter bags are independently installed, so that when a bag is clogged or reaches the service life, it can be replaced individually without stopping the entire system, reducing maintenance cost and time.

[0009] Preferably, the sensor is a pressure transmitter. The pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and transmission. The pressure transmitter can convert the physical pressure parameters of gas, liquid, etc. sensed by the pressure element sensor into standard electrical signals, and then transmit the electrical signals detected by the pressure transmitter to the PLC control cabinet, so that the PLC control cabinet can quickly receive the signals. The pressure transmitter is small in size, light in weight, easy to install, debug and use, and directly senses the measured liquid level pressure without being affected by medium foaming and deposition.

[0010] Preferably, the gas turbine flowmeter, mass flowmeter, water content analyzer, sensor and PLC control cabinet are explosion-proof. Because in the field of oil exploitation, flammable and explosive materials and gases are often involved, and once the equipment fails or is improperly operated, it is easy to cause fire or explosion accidents. The explosion-proof gas turbine flowmeter, mass flowmeter, water content analyzer, sensor and PLC control cabinet are designed to make the instruments on the measurement system have certain explosion-proof function to cope with potential safety risks.

[0011] Preferably, the mass flow meter is a straight pipe section mass flow meter. In the existing oil well metering system, the mass flow meter is generally a Coriolis force mass flow meter, which is a device for directly measuring mass flow based on the principle of Coriolis force mass flow meter. The Coriolis force mass flow meter directly measures the mass flow, has high precision, and is generally composed of a vibrating tube and a converter. The vibrating tube has U-shaped, omega-shaped, ring-shaped, and spiral-shaped shapes, but the U-shaped, omega-shaped, ring-shaped, and spiral-shaped vibrating tubes will accumulate sludge in the actual production process. Once the U-shaped, omega-shaped, ring-shaped, and spiral-shaped vibrating tubes accumulate sludge, it is not convenient to maintain the sludge in the U-shaped, omega-shaped, ring-shaped, and spiral-shaped vibrating tubes, which affects the precision of the mass flow meter. Therefore, the mass flow meter of the present application adopts a straight pipe section mass flow meter, which is more convenient to maintain the sludge in the vibrating tube in the straight pipe section mass flow meter, and the precision of the mass flow meter is effectively guaranteed.

[0012] Preferably, the PLC control cabinet is connected with an alarm; the controller on the PLC control cabinet controls the opening and closing of the alarm, and when the PLC control cabinet detects changes in the input and output flow rate values or pressure values, the alarm sends an alarm, which means that the filter is blocked. The alarm is an audible and visual alarm. The audible and visual alarm sends a high-decibel alarm sound and a high-brightness light when danger occurs, which can attract people's attention in the first time and ensure that appropriate measures can be taken quickly in emergency situations.

[0013] Preferably, the gas turbine flow meter gas outlet is connected with the liquid conveying pipe at the outlet of the water content analyzer. The gas separated by the separator enters the mixing section from the rear end of the liquid conveying pipe after being measured by the gas turbine flow meter; after being measured by the liquid conveying pipe and the gas conveying pipe respectively, the gas and the liquid are mixed and exported. The connection of the gas turbine flow meter gas outlet and the liquid conveying pipe at the outlet of the water content analyzer greatly improves the convenience of oil and gas export.

[0014] Preferably, a combustible gas alarm is arranged on the separator. The combustible gas alarm is connected with the PLC control cabinet. When the combustible gas alarm detects that the combustible gas exceeds the standard, the signal is transmitted to the PLC control cabinet, and the PLC control cabinet controls the combustible gas alarm to send an alarm.

[0015] Preferably, the PLC control cabinet is connected with an explosion-proof fan, and the explosion-proof fan is located on the side of the separator. When the combustible gas alarm detects that the combustible gas exceeds the standard, the signal is transmitted to the PLC control cabinet, and the PLC control cabinet controls the combustible gas alarm to send an alarm, and at the same time, the PLC control cabinet controls the explosion-proof fan to start and forcibly replace the gas near the separator.

[0016] This invention incorporates a filter at the inlet of a mass flow meter to remove solid objects from the liquid, preventing them from flowing into the mass flow meter and causing errors in the measured values. To further prevent filter clogging and subsequent erroneous readings, sensors are connected to both the input and output ends of the filter. These sensors are connected to a PLC control cabinet, which compares the input and output flow rate or pressure readings to determine if the filter is clogged. If the input and output flow rate or pressure values ​​remain unchanged, it means the filter is not clogged, and the mass flow meter readings are normal. However, if the PLC control cabinet detects changes in the input and output flow rate or pressure values, it means the filter is clogged, and the mass flow meter readings are incorrect and invalid. In this case, the filter needs to be opened, the solid blockage removed, and the mass flow meter retested. This ensures that the mass flow meter readings are correct and solves the technical problem of erroneous flow meter readings caused by solid blockages in existing oil well metering systems. Attached Figure Description

[0017] To more clearly illustrate 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.

[0018] Figure 1 This is a schematic diagram of the present invention.

[0019] In the diagram, 1 is the separator, 2 is the gas delivery pipe, 3 is the liquid delivery pipe, 4 is the gas turbine flow meter, 5 is the filter, 6 is the mass flow meter, 7 is the water content analyzer, 8 is the sensor, and 9 is the emergency shut-off valve. Detailed Implementation

[0020] 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.

[0021] Example 1: A skid-mounted intelligent metering system for oil wells, such as... Figure 1As shown, the system includes an air supply pipe 2 connected to the air outlet of separator 1, a liquid supply pipe 3 connected to the liquid outlet of separator 1, and a PLC control cabinet. A gas turbine flow meter 4 is connected to the air supply pipe 2. A filter 5, a mass flow meter 6, and a moisture analyzer 7 are connected in sequence to the liquid supply pipe 3. The filter 5, mass flow meter 6, and moisture analyzer 7 are arranged in sequence along the liquid outflow direction. Sensors 8 are connected to both the input and output ends of the filter 5. The gas turbine flow meter 4, mass flow meter 6, moisture analyzer 7, and sensor 8 are all connected to the PLC control cabinet. This application arranges a filter 5 at the inlet of the mass flow meter 6 to filter solid objects in the liquid, preventing solid objects from flowing into the mass flow meter 6 and causing errors in the measured values. To further prevent solid objects from clogging the filter 5 and causing errors in the measured values, sensors 8 are connected to both the input and output ends of the filter 5. These sensors 8 are connected to the PLC control cabinet. The PLC control cabinet compares the flow rate or pressure values ​​at the input and output ends of the sensors 8 to determine whether the filter 5 is clogged. When the PLC control cabinet... If the flow rate or pressure values ​​detected by the PLC control cabinet remain unchanged, it means that filter 5 is not clogged, and the mass flow meter 6 will detect normal data. However, if the flow rate or pressure values ​​detected by the PLC control cabinet change, it means that filter 5 is clogged, and the mass flow meter 6 will detect incorrect data, which is then invalid. In this case, filter 5 needs to be opened, the solid material blocking the filter 5 emptied, and the mass flow meter 6 retested. This ensures that the mass flow meter 6 detects correct data, thus solving the technical problem of flow meter reading errors caused by solid material affecting the flow meter in existing oil well metering systems.

[0022] The gas turbine flow meter 4 measures the flow rate of gas in the gas delivery pipe 2, the mass flow meter 6 measures the flow rate of liquid in the liquid delivery pipe 3, and the water content analyzer 7 measures the water content in the liquid. The PLC control cabinet includes a display section and a control section. The display section is a display screen, and the control section is a controller. The gas turbine flow meter 4, mass flow meter 6, water content analyzer 7, and sensor 8 are all connected to the PLC control cabinet. The values ​​detected by the gas turbine flow meter 4, mass flow meter 6, water content analyzer 7, and sensor 8 are displayed on the display screen of the PLC control cabinet.

[0023] Example 2, based on Example 1, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1As shown, the input end of the filter 5 is equipped with an emergency shut-off valve 9, which is connected to the PLC control cabinet. When the PLC control cabinet detects a change in the input and output flow rate or pressure values, it means that the filter 5 is clogged, and the mass flow meter 6 detects erroneous data, rendering the data invalid. At this time, the PLC control cabinet controls the emergency shut-off valve 9 to close, causing the infusion pipe 3 to stop supplying liquid to the filter 5. Then, the filter 5 can be opened, and the solid object blocking the filter 5 can be emptied. Then, the emergency shut-off valve 9 is reopened by the PLC control cabinet, and the mass flow meter 6 is used to re-detect, ensuring that the data detected by the mass flow meter 6 is correct.

[0024] Example 3, based on Example 2, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1 As shown, filter 5 is a multi-bag filter. Because a multi-bag filter uses multiple filter bags, the total filtration area is large, making it suitable for processing large volumes of fluid or applications requiring high purification levels. Furthermore, each filter bag is installed independently, and when a bag becomes clogged or reaches the end of its service life, it can be replaced individually without shutting down the entire system, thus reducing maintenance costs and time.

[0025] Example 4, based on Example 3, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1 As shown, sensor 8 is a pressure transmitter. A pressure transmitter is a device that converts pressure into pneumatic or electrical signals for control and remote transmission. It converts the physical pressure parameters of gases, liquids, etc., sensed by the pressure-sensing element sensor into standard electrical signals, which are then transmitted to the PLC control cabinet for rapid signal reception. Pressure transmitters are small, lightweight, easy to install, debug, and use, and directly sense the pressure of the measured liquid level, unaffected by foaming or sedimentation of the medium.

[0026] Example 5, based on Example 4, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1 As shown, the gas turbine flow meter 4, mass flow meter 6, water content analyzer 7, sensor 8, and PLC control cabinet are all explosion-proof. In the oil extraction field, flammable and explosive materials and gases are often involved. Equipment malfunctions or improper operation can easily lead to fires or explosions. The explosion-proof design of the gas turbine flow meter 4, mass flow meter 6, water content analyzer 7, sensor 8, and PLC control cabinet ensures that the instruments in the metering system have a certain degree of explosion-proof capability to address potential safety risks.

[0027] Example 6, based on Example 5, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1As shown, the mass flow meter 6 is a straight-pipe mass flow meter. In existing oil well metering systems, the mass flow meter 6 typically utilizes the Coriolis mass flow meter principle to directly measure mass flow rate, consisting of a flow detection element and a converter. The Coriolis mass flow meter achieves direct measurement of mass flow rate with high accuracy. It generally consists of a vibrating tube and a converter. The vibrating tube can be U-shaped, Ω-shaped, annular, or spiral. However, these shapes tend to accumulate sludge during actual production. Once sludge accumulates in these shapes, maintenance becomes difficult, affecting the accuracy of the mass flow meter 6. Therefore, this application uses a straight-pipe mass flow meter 6. The straight-pipe mass flow meter makes sludge maintenance easier, effectively ensuring the accuracy of the mass flow meter 6.

[0028] Example 7, based on Example 6, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1 As shown, the PLC control cabinet is connected to an alarm. When the PLC control cabinet detects changes in the input and output flow rate or pressure values, the alarm sounds. The controller on the PLC control cabinet controls the alarm to turn on and off. The alarm is an audible and visual alarm. The audible and visual alarm emits sound and light signals, providing a high-decibel alarm and a bright light when danger occurs, attracting attention immediately and ensuring rapid response in emergencies.

[0029] Example 8, based on any one of Examples 1 to 7, a skid-mounted intelligent metering system for oil wells, such as... Figure 1 As shown, the gas delivery pipe 2 at the outlet of the gas turbine flow meter 4 is connected to the liquid delivery pipe 3 at the outlet of the water content analyzer 7. The gas separated by the separator 1, after being measured by the gas turbine flow meter 4, enters the mixing section from the rear end of the liquid delivery pipe 3; after being measured separately by the liquid delivery pipe 3 and the gas delivery pipe 2, the gas and liquid are mixed and transported externally. The connection between the gas delivery pipe 2 at the outlet of the gas turbine flow meter 4 and the liquid delivery pipe 3 at the outlet of the water content analyzer 7 greatly improves the convenience of oil and gas external transportation.

[0030] Example 9, based on Example 8, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1 As shown, the separator 1 is equipped with a combustible gas alarm, which is connected to the PLC control cabinet. When the combustible gas alarm detects that the combustible gas level exceeds the limit, the signal is transmitted to the PLC control cabinet, which then controls the combustible gas alarm to issue an alarm.

[0031] Example 10, based on Example 9, provides a skid-mounted intelligent metering system for oil wells, such as... Figure 1 As shown, the PLC control cabinet is connected to an explosion-proof fan, which is located on the side of separator 1. When the combustible gas alarm detects that the combustible gas level exceeds the limit, the signal is transmitted to the PLC control cabinet. The PLC control cabinet then controls the combustible gas alarm to sound an alarm, and simultaneously controls the explosion-proof fan to start, forcibly replacing the gas near separator 1 with fresh air.

[0032] In Example 10, the oil well product enters separator 1 and is separated. The liquid in separator 1 is discharged through the drain port along the delivery pipe 3, and the gas is discharged through the natural gas outlet along the gas delivery pipe 2. The gas turbine flow meter 4 on the gas delivery pipe 2 measures the natural gas flow rate. The mass flow meter 6 and the water content analyzer 7 on the delivery pipe 3 measure the liquid flow rate and the water content in the liquid, respectively. Then, the gas turbine flow meter 4, mass flow meter 6, and water content analyzer 7 transmit the measurement data to the PLC control cabinet so that the PLC control cabinet can record the data measured by the gas turbine flow meter 4, mass flow meter 6, and water content analyzer 7. Furthermore, the PLC control cabinet compares the input and output flow rate or pressure values ​​of the sensors 8 at the input and output ends to determine whether the filter 5 is being filtered. If the PLC control cabinet detects no change in the input and output flow rate or pressure values, it means that filter 5 is not blocked, and the mass flow meter 6 will detect normal data. If the PLC control cabinet detects a change in the input and output flow rate or pressure values, the alarm will sound, indicating that filter 5 is blocked. The mass flow meter 6 will then detect incorrect data, which will be invalid. At this time, the PLC control cabinet will close the emergency shut-off valve 9, stopping the infusion pipe 3 from supplying liquid to filter 5. Then, filter 5 can be opened, and the solid object blocking filter 5 can be emptied. Then, the emergency shut-off valve 9 will be reopened via the PLC control cabinet, and the mass flow meter 6 will be used to re-detect, ensuring that the data detected by the mass flow meter 6 is correct.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A skid-mounted intelligent metering system for oil wells, comprising a gas delivery pipe (2) connected to the gas outlet of a separator (1), a liquid delivery pipe (3) connected to the liquid outlet of the separator (1), and a PLC control cabinet, characterized in that, A gas turbine flow meter (4) is connected to the gas delivery pipe (2). A filter (5), a mass flow meter (6), and a water content analyzer (7) are connected in sequence to the liquid delivery pipe (3). The filter (5), mass flow meter (6), and water content analyzer (7) are arranged in sequence along the liquid outflow direction. A sensor (8) is connected to both the input and output ends of the filter (5). The gas turbine flow meter (4), mass flow meter (6), water content analyzer (7), and sensor (8) are all connected to the PLC control cabinet.

2. The skid-mounted intelligent metering system for oil wells according to claim 1, characterized in that: The input end of the filter (5) is equipped with an emergency shut-off valve (9), which is connected to the PLC control cabinet.

3. The skid-mounted intelligent metering system for oil wells according to claim 2, characterized in that: The filter (5) is a multi-bag filter.

4. The skid-mounted intelligent metering system for oil wells according to claim 3, characterized in that: The sensor (8) is a pressure transmitter.

5. The skid-mounted intelligent metering system for oil wells according to claim 4, characterized in that: The gas turbine flow meter (4), mass flow meter (6), water content analyzer (7), sensor (8) and PLC control cabinet are all explosion-proof.

6. The skid-mounted intelligent metering system for oil wells according to claim 5, characterized in that: The mass flow meter (6) is a straight pipe section mass flow meter.

7. The skid-mounted intelligent metering system for oil wells according to claim 6, characterized in that: The PLC control cabinet is connected to an alarm; the alarm is an audible and visual alarm.

8. The skid-mounted intelligent metering system for oil wells according to any one of claims 1 to 7, characterized in that: The gas delivery pipe (2) at the outlet of the gas turbine flow meter (4) is connected to the liquid delivery pipe (3) at the outlet of the water content analyzer (7).

9. The skid-mounted intelligent metering system for oil wells according to claim 8, characterized in that: The separator (1) is equipped with a combustible gas alarm, which is connected to the PLC control cabinet.

10. The skid-mounted intelligent metering system for oil wells according to claim 9, characterized in that: The PLC control cabinet is connected to an explosion-proof fan, which is located on the side of the separator (1).

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