Skid-mounted oil well metering device

Abstract

The utility model discloses a skid-mounted oil well metering device, which relates to the technical field of oil and gas conveying and metering, and is characterized in that a filter is arranged at an inlet of a mass flow meter, and the input end and the output end of the filter are respectively connected with an inductor; the sensors at the input end and the output end compare input and output flow velocity values or pressure values, the input and output flow velocity values or pressure values do not change, it means that the filter is not blocked, detection values of the mass flow meter are normal data, the input and output flow velocity values or pressure values change, and it means that the filter is not blocked. If the filter is blocked and the detection value of the mass flow meter is wrong data, the data is discarded, then the filter is opened, the solid-state object in the blocked filter is poured out, and the mass flow meter is used for re-detection, so that the detection data of the mass flow meter is ensured not to be wrong; the problem that a flow meter on an existing oil well metering system is affected by a solid loading object, and the detection value of the flow meter is wrong 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 metering device. 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, and the produced liquid quantity and gas cannot be effectively measured.

[0003] The oil well contains solid objects such as silt, and these solid objects seriously affect the flow meter on the existing oil well metering 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 metering device, which solves the technical problem that the flow meter on the existing oil well metering system is affected by solid objects and the detection value of the flow meter is incorrect.

[0005] The technical solution of this utility model is implemented as follows: A skid-mounted oil well metering device includes a gas delivery pipe connected to the gas outlet of a separator and a liquid delivery pipe connected to the liquid outlet of a separator. A gas turbine flow meter is connected to the gas delivery pipe, and a filter, a mass flow meter, and a water content analyzer are connected in sequence to the liquid delivery pipe. The filter, mass flow meter, and water content analyzer are arranged in sequence along the liquid outflow direction. Sensors are connected to both the input and output ends of the filter. This application incorporates a filter at the inlet of the 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 errors, sensors are connected to both the input and output ends of the filter. The flow rate or pressure values ​​at the input and output are compared to determine if the filter is clogged. If the flow rate or pressure values ​​remain unchanged, the filter is not clogged, and the mass flow meter reading is normal. Conversely, changes in these values ​​indicate filter clogging, resulting in an incorrect reading. In this case, the filter must be opened, the clogged solid objects removed, and the mass flow meter retested. This ensures accurate flow meter readings and resolves the technical problem of flow meter readings being affected by solid objects in existing oil well metering systems.

[0006] The gas turbine flow meter measures the flow rate of gas in the gas delivery pipe, the mass flow meter measures the flow rate of liquid in the liquid delivery pipe, and the water content analyzer measures the water content in the liquid.

[0007] Preferably, the filter is equipped with an emergency shut-off valve at its input end. When the input and output flow rate or pressure values ​​change, it indicates that the filter is clogged, and the mass flow meter reading becomes incorrect and invalid. At this point, the emergency shut-off valve closes, stopping the infusion tube from supplying liquid to the filter. The filter can then be opened, the clogged solids emptied, and the emergency shut-off valve reopened. The mass flow meter is then re-tested, ensuring that the mass flow meter readings are accurate.

[0008] Preferably, the filter 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; when a bag becomes clogged or reaches the end of its service life, it can be replaced individually without shutting down the entire system, reducing maintenance costs and time.

[0009] Preferably, the sensor is a pressure transmitter. A pressure transmitter is a device that converts pressure into a pneumatic or electrical signal for control and remote transmission. Pressure transmitters are small in size, lightweight, easy to install, debug, and use, and directly sense the pressure of the liquid being measured, unaffected by foaming or sedimentation of the medium.

[0010] Preferably, the gas turbine flow meter, filter, mass flow meter, moisture analyzer, and sensor are all explosion-proof. This is because flammable and explosive materials and gases are often involved in oil extraction. Equipment malfunctions or improper operation can easily lead to fires or explosions. Explosion-proof gas turbine flow meters, filters, mass flow meters, moisture analyzers, and sensors are designed to provide the instruments in the metering system with a certain degree of explosion-proof capability to address potential safety risks.

[0011] Preferably, the mass flow meter is a straight-pipe mass flow meter. In existing oil well metering systems, mass flow meters typically utilize Coriolis mass flow meters, which are devices that directly measure mass flow based on the principle of Coriolis mass flow meters. These devices consist of a flow detection element and a converter. Coriolis mass flow meters achieve direct measurement of mass flow and have high accuracy. A typical Coriolis mass flow meter consists of a vibrating tube and a converter. The vibrating tube can be U-shaped, Ω-shaped, annular, or spiral. However, these types of vibrating tubes tend to accumulate sludge during actual production. Once sludge accumulates in these tubes, maintenance becomes difficult, affecting the accuracy of the mass flow meter. Therefore, this application uses a straight-pipe mass flow meter. In a straight-pipe mass flow meter, the sludge inside the vibrating tube is easier to maintain, effectively ensuring the accuracy of the mass flow meter.

[0012] Preferably, the gas delivery pipe at the outlet of the gas turbine flow meter is connected to the liquid delivery pipe at the outlet of the water content analyzer. The gas separated by the separator, after being metered by the gas turbine flow meter, enters the mixing section from the rear end of the liquid delivery pipe; after being metered separately by the liquid delivery pipe and the gas delivery pipe, the gas and liquid are mixed and then transported out. The connection between the gas delivery pipe at the outlet of the gas turbine flow meter and the liquid delivery pipe at the outlet of the water content analyzer greatly improves the convenience of oil and gas transportation.

[0013] Preferably, a control valve is provided on the gas transmission pipe at the gas turbine flow meter inlet. The control valve is provided to facilitate the opening and closing of the gas transmission pipe and to regulate the flow rate of natural gas.

[0014] Preferably, the separator is equipped with a safety valve. The safety valve ensures the safe operation of the separator and prevents accidents caused by excessive pressure. When the separator pressure exceeds a specified value, the safety valve automatically opens, discharging a portion of the gas or fluid in the separator into the atmosphere or outside the pipeline, ensuring the separator pressure does not exceed the allowable value, thereby protecting the separator from excessive pressure. The safety valve in this application is a commonly used safety valve that can automatically open and reduce pressure.

[0015] Preferably, the separator is equipped with a combustible gas alarm and an explosion-proof fan on its side, with the combustible gas alarm and explosion-proof fan arranged opposite each other on both sides of the separator. When the combustible gas alarm detects that the combustible gas level exceeds the standard, the combustible gas alarm will sound an alarm, and the explosion-proof fan can be activated to force air replacement of the gas near the separator.

[0016] The beneficial effects of this utility model are:

[0017] A filter is installed at the inlet of the mass flow meter to remove solid objects from the liquid, preventing them from flowing into the mass flow meter and causing errors in the readings. To further prevent filter clogging and subsequent errors, sensors are connected to both the inlet and outlet of the filter. These sensors compare the input and output flow rate or pressure values ​​to determine if the filter is clogged. No change in these values ​​indicates the filter is not clogged, and the mass flow meter reading is normal. Changes in these values ​​indicate clogging, resulting in an incorrect reading. In this case, the filter needs to be opened, the clogged solid objects removed, and the mass flow meter re-measured, ensuring accurate readings. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] In the diagram, 1 is the separator, 2 is the gas supply pipe, 3 is the liquid supply 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, 9 is the emergency shut-off valve, 10 is the control valve, and 11 is the safety valve. Detailed Implementation

[0021] 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.

[0022] Example 1: A skid-mounted oil well metering device, such as Figure 1 As shown, it includes an air supply pipe 2 connected to the air outlet of separator 1 and a liquid supply pipe 3 connected to the liquid outlet of separator 1. A gas turbine flow meter 4 is connected to the air supply pipe 2. A filter 5, a mass flow meter 6 and a water content analyzer 7 are connected in sequence to the liquid supply 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 end and the output end of the filter 5. This application installs 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 flow meter's readings. To further prevent solid objects from clogging the filter 5 and causing errors in the flow meter's readings, sensors 8 are connected to both the input and output ends of the filter 5. These sensors compare the input and output flow rate or pressure values ​​to determine if the filter 5 is clogged. If there is no change in the input and output flow rate or pressure values, the filter 5 is not clogged, and the flow meter reading is normal. If there is a change in the input and output flow rate or pressure values, the filter 5 is clogged, and the flow meter reading is incorrect and invalid. In this case, the filter 5 needs to be opened, the solid objects clogging it poured out, and the flow meter 6 re-tested, ensuring that the flow meter's readings are correct. This solves the technical problem in existing oil well metering systems where flow meters are affected by solid objects, leading to erroneous flow meter readings.

[0023] Among them, 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.

[0024] Example 2, based on Example 1, provides a skid-mounted oil well metering device, such as... Figure 1As shown, the input end of the filter 5 is equipped with an emergency shut-off valve 9. When the input and output flow rate or pressure values ​​change, it means that the filter 5 is clogged, and the mass flow meter 6 detects erroneous data, which is then invalidated. At this time, the emergency shut-off valve 9 is closed, 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. The emergency shut-off valve 9 is then reopened, and the mass flow meter 6 is used to re-detect, ensuring that the data detected by the mass flow meter 6 is correct.

[0025] Example 3, based on Example 2, provides a skid-mounted oil well metering device, 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.

[0026] Example 4, based on Example 3, provides a skid-mounted oil well metering device, such as... Figure 1 As shown, sensor 8 is a pressure transmitter. A pressure transmitter is a device that converts pressure into a pneumatic or electrical signal for control and remote transmission. Pressure transmitters are small in size, 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.

[0027] Example 5, based on Example 4, provides a skid-mounted oil well metering device, such as... Figure 1 As shown, the gas turbine flow meter 4, filter 5, mass flow meter 6, water content analyzer 7, and sensor 8 are all explosion-proof. This is because flammable and explosive materials and gases are often involved in oil extraction. Equipment malfunctions or improper operation can easily lead to fires or explosions. The explosion-proof design of the gas turbine flow meter 4, filter 5, mass flow meter 6, water content analyzer 7, and sensor 8 ensures that the instruments in the metering system have a certain degree of explosion-proof capability to address potential safety risks.

[0028] Example 6, based on Example 5, provides a skid-mounted oil well metering device, 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.

[0029] Example 7, based on Example 6, provides a skid-mounted oil well metering device, 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 8, based on Example 7, provides a skid-mounted oil well metering device, such as... Figure 1 As shown, a control valve 10 is provided on the gas transmission pipe 2 at the inlet of the gas turbine flow meter 4. The control valve 10 is provided to facilitate the opening and closing of the gas transmission pipe 2, and the flow rate of the delivered natural gas can be adjusted through the control valve 10.

[0031] Example 9, based on any one of Examples 1 to 8, a skid-mounted oil well metering device, such as... Figure 1 As shown, the separator 1 is equipped with a safety valve 11. The safety valve 11 is designed to ensure the safe operation of the separator 1 and prevent accidents caused by excessive pressure. When the pressure in the separator 1 exceeds a specified value, the safety valve 11 will automatically open, discharging a portion of the gas or fluid in the separator 1 into the atmosphere or outside the pipeline, ensuring that the pressure in the separator 1 does not exceed the allowable value, thereby protecting the separator 1 from excessive pressure. The safety valve 11 in this application is a commonly used safety valve that can automatically open and reduce pressure.

[0032] Example 10, based on Example 9, provides a skid-mounted oil well metering device, such as...Figure 1 As shown, a combustible gas alarm and an explosion-proof fan are provided on the side of the separator 1. The combustible gas alarm and the explosion-proof fan are arranged opposite each other on both sides of the separator 1. When the combustible gas alarm detects that the combustible gas exceeds the standard, the combustible gas alarm will sound an alarm and control the start of the explosion-proof fan to force air replacement of the gas near the separator 1.

[0033] 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 liquid 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 water content analyzer 7 on the liquid delivery pipe 3 measure the liquid flow rate and the water content in the liquid, respectively. The sensor 8 at the input and output ends compares the input and output flow rate or pressure values ​​to determine whether the filter 5 is blocked. When the input and output flow rate or pressure values ​​do not change, the filter 5 is blocked. This means that filter 5 is not clogged, and the mass flow meter 6 detects normal data. When the input and output flow rate or pressure values ​​change, it means that filter 5 is clogged, and the mass flow meter 6 detects incorrect data, which is invalid. At this time, control the emergency shut-off valve 9 to close, so that the infusion pipe 3 stops delivering liquid to filter 5. Then filter 5 can be opened to empty the solid object blocking filter 5. Then control the emergency shut-off valve 9 to open again, and use the mass flow meter 6 to detect again to ensure that the mass flow meter 6 detects no errors.

[0034] 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 oil well metering device, comprising a gas delivery pipe (2) connected to the gas outlet of a separator (1) and a liquid delivery pipe (3) connected to the liquid outlet of the separator (1), characterized in that, A gas turbine flow meter (4) is connected to the gas delivery pipe (2), and a filter (5), a mass flow meter (6) and a water content analyzer (7) are connected to the liquid delivery pipe (3) in sequence. The filter (5), mass flow meter (6) and water content analyzer (7) are arranged in sequence along the liquid outflow direction. The input end and output end of the filter (5) are respectively connected to a sensor (8).

2. The skid-mounted oil well metering device according to claim 1, characterized in that: The filter (5) is equipped with an emergency shut-off valve (9) at its input end.

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

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

5. The skid-mounted oil well metering device according to claim 4, characterized in that: The gas turbine flow meter (4), filter (5), mass flow meter (6), water content analyzer (7), and sensor (8) are all explosion-proof.

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

7. The skid-mounted oil well metering device according to claim 6, 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).

8. The skid-mounted oil well metering device according to claim 7, characterized in that: A control valve (10) is provided on the air supply pipe (2) at the air inlet of the gas turbine flow meter (4).

9. The skid-mounted oil well metering device according to any one of claims 1 to 8, characterized in that: The separator (1) is equipped with a safety valve (11).

10. The skid-mounted oil well metering device according to claim 9, characterized in that: The side of the separator (1) is provided with a combustible gas alarm and an explosion-proof fan, which are arranged opposite each other on both sides of the separator (1).

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