Remote online measurement system for crude oil flow
阅读说明:本技术 一种原油流量远程在线测量系统 (Remote online measurement system for crude oil flow ) 是由 崔巍 王奕璇 曹新亮 任新成 于 2019-10-12 设计创作,主要内容包括:本发明公开了一种原油流量远程在线测量系统,包括过滤装置、计量装置、校准装置和远程存储装置,过滤装置用于对原油进行过滤,滤除固体杂质,所述计量装置用于对过滤后的原油进行油气分离和流量测量,校准装置用于对测量得到的流量数据进行校准,远程存储装置则用于对校准后的流量数据进行存储。本发明使用过滤装置和计量装置分别对原油进行过滤和油气分离,以使计量装置中的流量计测量得到相对准确的数据,测量得到的数据经过校准后能够进一步提高流量数据的准确性。(The invention discloses a crude oil flow remote online measurement system which comprises a filtering device, a metering device, a calibrating device and a remote storage device, wherein the filtering device is used for filtering crude oil and filtering solid impurities, the metering device is used for carrying out oil-gas separation and flow measurement on the filtered crude oil, the calibrating device is used for calibrating flow data obtained by measurement, and the remote storage device is used for storing the calibrated flow data. The invention uses the filtering device and the metering device to respectively carry out filtering and oil-gas separation on the crude oil, so that the flowmeter in the metering device measures to obtain relatively accurate data, and the measured data can further improve the accuracy of flow data after being calibrated.)
1. A remote online crude oil flow measuring system is characterized by comprising a filtering device, a metering device, a calibrating device and a remote storage device, wherein the filtering device and the metering device are communicated in sequence by using a pipeline, a flow meter (411) is arranged in the metering device, and the flow meter (411), the calibrating device and the remote storage device are sequentially in communication connection;
the filtering device comprises a crude oil input pipe (100) and an intermediate output pipe (200), a filter screen (110) is arranged in the crude oil input pipe (100) close to the tail end, and the outlet of the filter screen (110) is communicated with the intermediate output pipe (200);
the metering device comprises a metering output pipe (400) and a secondary gas output pipe (500), the tail end of the middle output pipe (200) is divided into a metering input pipe (410) and a secondary gas guide pipe (510), the metering input pipe (410) is communicated with the metering output pipe (400), the secondary gas guide pipe (510) is communicated with the secondary gas output pipe (500), the secondary gas guide pipe (510) is positioned above the metering input pipe (410), the flowmeter (411) is a positive displacement flowmeter and is arranged in the metering input pipe (410), a secondary oil return pipe (520) is arranged on the secondary gas guide pipe (510), and the tail end of the secondary oil return pipe (520) is communicated with the metering output pipe (400);
after receiving the flow data sent by the flowmeter (411), the calibrating device calibrates the flow data according to a set calibrating strategy, and the remote storage device receives and stores the calibrated flow data sent by the calibrating device in real time.
2. The remote online crude oil flow measuring system according to claim 1, wherein the filtering device further comprises a primary gas output pipe (300), a shunt pipe (130) is installed at the outlet of the filter screen (110), the tail end of the shunt pipe (130) is shunted into a primary gas guide pipe (310) and a middle oil guide pipe (210), the primary gas guide pipe (310) is located above the middle oil guide pipe (210), the primary gas guide pipe (310) is communicated with the primary gas output pipe (300), the middle oil guide pipe (210) is communicated with the middle output pipe (200), a primary oil return pipe (320) is installed on the primary gas guide pipe (310), and the tail end of the primary oil return pipe (320) is communicated with the middle oil guide pipe (210).
3. The remote online crude oil flow measuring system according to claim 2, wherein the primary porous baffle (311) is installed inside the primary gas-guide tube (310), the primary porous baffle (311) has a plurality of through holes, and the connection point of the primary gas-guide tube (310) and the primary oil return tube (320) is located behind the primary porous baffle (311) in the gas flowing direction.
4. The remote online crude oil flow measuring system according to claim 2, wherein the primary gas-guide tube (310) and the intermediate oil-guide tube (210) are both at an obtuse angle with the branch pipe (130).
5. The remote online crude oil flow measuring system according to claim 1, wherein a secondary porous baffle (511) is installed inside the secondary gas-guide tube (510), the secondary porous baffle (511) has a plurality of through holes, and the joint of the secondary gas-guide tube (510) and the secondary oil-return tube (520) is located behind the secondary porous baffle (511) in the gas flowing direction.
6. The remote on-line crude oil flow measuring system according to claim 1, wherein the secondary air duct (510) and the metering input pipe (410) are both disposed at an obtuse angle with respect to the intermediate output pipe (200).
7. The remote on-line crude oil flow measuring system according to claim 1, wherein the crude oil input pipe (100) is provided with an impurity discharge pipe (120) on the lower side surface near the filter screen (110), and the impurity discharge pipe (120) is provided with an upper valve (111) and a lower valve (112) in sequence from top to bottom.
8. The remote on-line measuring system of crude oil flow rate according to claim 7, wherein the side wall of the impurity discharging pipe (120) near the filter screen (110) is inclined and gradually decreases in height in a direction toward the impurity discharging pipe (120).
9. The remote online crude oil flow measurement system according to claim 1, wherein the calibration device calibrates the flow data according to a set calibration strategy, wherein the calibration strategy is as follows:
selecting a corresponding calibration standard according to the type of the crude oil in the pipeline, wherein the calibration standard comprises calibration values of each crude oil at different flow rates;
and under the selected calibration standard, determining a corresponding calibration value according to the flow speed data measured by the flowmeter, and calibrating the flow data by using the calibration value to obtain the calibrated flow data.
10. The system of claim 9, wherein the calibration standard is obtained experimentally in a laboratory.
Technical Field
The invention belongs to the technical field of oil exploitation equipment, and relates to a crude oil flow remote online measurement system.
Background
Although petroleum is the most important energy source in the world at present, people are actively developing non-fossil energy sources for replacing petroleum, but the petroleum cannot be replaced in a short time. Crude oil extracted by drilling needs to be transported to a refinery via pipelines to produce various products that can be used directly.
In the process of using the pipeline to convey the crude oil, the conveying state of the crude oil needs to be detected in real time, including parameters such as pressure, flow velocity and flow in the pipeline, and the data are not only beneficial to monitoring the conveying safety state of the crude oil, but also can provide reference for petroleum production to a certain extent. The flow rate is the most important of the data, and the measurement of the crude oil flow rate is generally carried out by a flow meter at present, and the flow meter has various forms, including a differential pressure type, a rotor type, a throttling type, a positive displacement type and the like, wherein the positive displacement type flow meter has higher precision and is widely applied, and the flow meter of the form is represented by an oval gear flow meter.
However, the positive displacement flowmeter has a high requirement on the original cleanliness when in use, a large amount of solid impurities cannot be contained in the original flowmeter so as to avoid influencing the normal operation of the flowmeter, and excessive gas cannot be dissolved in crude oil, otherwise, the measurement precision is reduced. Because the application range of the positive displacement flowmeter is limited due to the requirement on the application environment, it is necessary to provide a crude oil flow measuring system to create a suitable application environment for the positive displacement flowmeter so as to improve the flow measurement accuracy.
Disclosure of Invention
The invention aims to provide a remote online measurement system for crude oil flow, which solves the problem of insufficient accuracy of the existing crude oil flow measurement.
The technical scheme adopted by the invention is that the crude oil flow remote online measuring system comprises a filtering device, a metering device, a calibrating device and a remote storage device, wherein the filtering device and the metering device are sequentially communicated by using a pipeline;
the filtering device comprises a crude oil input pipe and an intermediate output pipe, a filter screen is arranged in the crude oil input pipe close to the tail end, and an outlet of the filter screen is communicated with the intermediate output pipe;
the metering device comprises a metering output pipe and a secondary gas output pipe, the tail end of the middle output pipe is divided into a metering input pipe and a secondary gas guide pipe, the metering input pipe is communicated with the metering output pipe, the secondary gas guide pipe is communicated with the secondary gas output pipe, the secondary gas guide pipe is positioned above the metering input pipe, the flow meter is a positive displacement flow meter and is installed in the metering input pipe, a secondary oil return pipe is installed on the secondary gas guide pipe, and the tail end of the secondary oil return pipe is communicated with the metering output pipe;
and after receiving the flow data sent by the flowmeter, the calibrating device calibrates the flow data according to a set calibrating strategy, and the remote storage device receives and stores the calibrated flow data sent by the calibrating device in real time.
The present invention is also characterized in that,
the filter device further comprises a primary gas output pipe, a shunt pipeline is installed at the outlet of the filter screen, the tail end of the shunt pipeline is shunted into a primary gas guide pipe and a middle oil guide pipe, the primary gas guide pipe is located above the middle oil guide pipe, the primary gas guide pipe is communicated with the primary gas output pipe, the middle oil guide pipe is communicated with the middle output pipe, a primary oil return pipe is installed on the primary gas guide pipe, and the tail end of the primary oil return pipe is communicated with the middle oil guide pipe.
The primary porous baffle is arranged in the primary air duct, a plurality of through holes are formed in the primary porous baffle, and the joint of the primary air duct and the primary oil return pipe is positioned behind the primary porous baffle in the air flowing direction.
The primary air duct and the middle oil guide pipe are both provided with included angles with the diversion pipeline, and the included angles are obtuse angles.
The second-stage air guide pipe is internally provided with a second-stage porous baffle plate, a plurality of through holes are formed in the second-stage porous baffle plate, and the joint of the second-stage air guide pipe and the second-stage oil return pipe is positioned behind the second-stage porous baffle plate in the air flowing direction.
The secondary air duct and the metering input pipe are respectively provided with an included angle with the intermediate output pipe, wherein the included angle is an obtuse angle.
The crude oil input pipe is provided with an impurity discharge pipe on the lower side surface close to the filter screen, and the impurity discharge pipe is sequentially provided with an upper valve and a lower valve from top to bottom.
The side wall of the impurity discharge pipe close to the filter screen is inclined and gradually reduces in height in the direction towards the impurity discharge pipe.
The calibration device calibrates the flow data according to a set calibration strategy, wherein the calibration strategy is as follows:
selecting a corresponding calibration standard according to the type of the crude oil in the pipeline, wherein the calibration standard comprises calibration values of each crude oil at different flow rates;
and under the selected calibration standard, determining a corresponding calibration value according to the flow speed data measured by the flowmeter, and calibrating the flow data by using the calibration value to obtain the calibrated flow data.
Calibration standards are obtained experimentally in the laboratory.
The invention has the beneficial effects that the crude oil flow remote online measurement system comprises a filtering device, a metering device, a calibrating device and a remote storage device, wherein the filtering device is used for filtering crude oil and filtering solid impurities, the metering device is used for carrying out oil-gas separation and flow measurement on the filtered crude oil, the calibrating device is used for calibrating flow data obtained by measurement, and the remote storage device is used for storing the calibrated flow data. The invention uses the filtering device and the metering device to respectively carry out filtering and oil-gas separation on the crude oil, so that the flowmeter in the metering device measures to obtain relatively accurate data, and the measured data can further improve the accuracy of flow data after being calibrated.
Drawings
FIG. 1 is a block diagram of a remote online measurement system for crude oil flow according to the present invention;
FIG. 2 is a schematic view of the structure of the filter device;
fig. 3 is a schematic structural diagram of the metering device.
In the figure, 100, a crude oil input pipe, 110, a filter screen, 111, an upper valve, 112, a lower valve, 120, an impurity discharge pipe, 130, a diversion pipeline, 200, an intermediate output pipe, 210, an intermediate oil guide pipe, 300, a primary gas output pipe, 310, a primary gas guide pipe, 311, a primary porous baffle, 320, a primary oil return pipe, 400, a metering output pipe, 410, a metering input pipe, 411, a flow meter, 500, a secondary gas output pipe, 510, a secondary gas guide pipe, 511, a secondary porous baffle, 520 and a secondary oil return pipe.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a structure of a crude oil flow remote online measurement system, which comprises a filtering device, a metering device, a calibration device and a remote storage device, wherein the filtering device and the metering device are communicated by pipelines in sequence and are respectively used for filtering crude oil and measuring flow; the metering device is internally provided with a flowmeter, and the flowmeter, the calibrating device and the remote storage device are in communication connection in a wired or wireless mode in sequence; the calibration device and the remote storage device are respectively used for calibrating the flow data measured by the flowmeter and remotely storing the calibrated flow data.
As shown in fig. 2 and 3, the filtering apparatus includes a crude
The outlet of the
The
The metering device comprises a
The
The purpose of the filtering device is the same, a second-stage
After receiving the flow data sent by the
and selecting a corresponding calibration standard according to the type of the crude oil in the pipeline, wherein the calibration standard comprises calibration values of each crude oil at different flow rates, and the calibration standard can be obtained in a laboratory in an experimental mode. The crude oil can be divided into various types according to different standards, for example, the crude oil can be divided into paraffin-based crude oil, naphthenic-based crude oil and intermediate-based crude oil according to the components, the crude oil can be divided into ultra-low sulfur crude oil, sulfur-containing crude oil and high sulfur crude oil according to the sulfur content, and the like, and the crude oil of each type cannot be completely the same in amount due to different properties at the same flow rate in the metering device, so the calibration needs to be carried out according to the type of the crude oil to ensure the accuracy of the calibration result;
under the selected calibration standard, a corresponding calibration value is determined according to the flow rate data measured by the
And the remote storage device receives the calibrated flow data sent by the calibration device in real time and stores the data so as to facilitate the checking of the monitoring center.
In the embodiment, through the two-stage oil-gas separation of the filtering device and the metering device, a better separation effect can be achieved, and the flow measurement precision is improved to a certain extent. In the above-described filtering apparatus and metering apparatus, the separated gas is discharged from the gas outlet pipe, and if it is inconvenient or not allowed to discharge the gas in some applications, the gas outlet pipe may be removed, i.e., the primary
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