CN202486333U - Device for detecting gas-liquid two-phase liquid-flow plug and pig in pigging test - Google Patents
Device for detecting gas-liquid two-phase liquid-flow plug and pig in pigging test Download PDFInfo
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- CN202486333U CN202486333U CN2012200248751U CN201220024875U CN202486333U CN 202486333 U CN202486333 U CN 202486333U CN 2012200248751 U CN2012200248751 U CN 2012200248751U CN 201220024875 U CN201220024875 U CN 201220024875U CN 202486333 U CN202486333 U CN 202486333U
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Abstract
The utility model provides a device for detecting a gas-liquid two-phase liquid-flow plug and a pig in a pigging test. The device for detecting the gas-liquid two-phase liquid-flow plug and the pig in the pigging test comprises an infrared ray transmitting device installed outside a testing tube, an infrared ray receiving device installed outside the testing tube and connected with the infrared ray transmitting device through signals, a laser transmitting device installed outside the testing tube, a laser receiving device installed outside the testing tube and connected with the laser transmitting device through signals and a detection circuit installed outside the testing tube. The infrared ray transmitting device and the infrared receiving device are respectively installed on two sides of the testing tube, and are on the same horizontal plane with the testing tube. The infrared ray receiving device is in parallel connection with the laser receiving device on the detection circuit. The device for detecting the gas-liquid two-phase liquid-flow plug and the pig in the pigging test adopts methods of infrared ray and laser so that detection equipment can be installed outside a pipeline, flow in the pipeline is not affected and the pig in the pipeline is not blocked. The device for detecting the gas-liquid two-phase liquid-flow plug and the pig in the pigging test enriches detection data of pigging test, and is simple in experimental device, convenient to operate, cheap in price and accurate in result without any impact on the flow in the pipeline.
Description
Technical field
The utility model relates to a kind of device that detects rabbit in gas-liquid two-phase flow liquid plug and the pigging experiment.
Background technology
In the gas-liquid two-phase pipeline, under the slug flow flow pattern, liquid plug and air mass alternately appear on the pipeline section, and liquid plug liquid holdup is high, and liquid holdup is lower in the air mass; The pressure drop of liquid plug frictional resistance is bigger, and the air mass pressure drop is less.The liquid plug detects and mainly carries out based on liquid plug and the different characteristics of air mass in liquid holdup and pressure drop at present, and method commonly used has ray attenuation method, electromagnetic method, photoelectric method, differential pressure fluctuation method.
The ray attenuation method utilizes gas phase different to the absorption coefficient of ray with liquid phase, and is low through the detected transmitted intensity of out-of-date detecting element at the liquid plug, and air mass is high through out-of-date detected transmitted intensity; Ray has the advantage that penetrates various fluids; But the transmitted intensity of radioactive source emission has randomness, cause being difficult to accurately confirming the time that the liquid plug arrives, and radioactive source has certain danger; Need after national sector's permission, could use, use inconvenience.
The electromagnetic method principle is to confirm the liquid holdup on the pipeline section through the resistance that is installed in the element on the pipeline and the value of electric capacity, can judge the arrival and the departure time of fluid plug through the difference that detects liquid holdup in air mass and the liquid plug.
Photoelectric detecting method is according to the different principle of refractive index of gas, liquid two relative light, and air mass strengthens through the detected light intensity of optical fiber probe, and light intensity is low during liquid plug process, can judge the time that the liquid plug arrives and leaves through the variation that detects light intensity.
Detected differential pressure was greater than air mass when the principle of differential pressure fluctuation method was liquid plug process differential pressure pick-up; Can confirm that according to the situation of pressure surge liquid plug and air mass arrive the moment of differential pressure pick-up; This method equipment needed thereby is simple; Need not make special detection pipeline section, but high to the differential pressure pick-up accuracy requirement, detect data and be subject to external interference.
In above four kinds of methods, electromagnetic method and photoelectric method are used more.In addition, in oil and natural-gas transfer pipeline, also need carry out pigging.The pigging operation improves the defeated efficient of pipe, reduces corrosion and hydrate risk, and rabbit also has been used for well recovery.Carry out pigging when operation, rabbit promotes the liquid plug and moves ahead, thereby, detect the liquid plug normal with carry out pigging and operate and combine to carry out.In actual pipeline pigging process, can also use ball indicator to confirm that rabbit passes through the moment of certain point through the position that the electronics tracker is followed the tracks of rabbit is installed on rabbit.In the experiment of indoor pigging, it is less to test used rabbit, is difficult to install the electronics tracker, and need detects the time that rabbit reaches in many places, uses the ball indicator cost high.Method commonly used is to use ball indicator to confirm that rabbit gets into, leaves the moment of pipeline in laboratory experiment; And how rabbit was confirmed through the method for range estimation and pressure surge through the moment of other positions; The range estimation error is bigger, and when the pressure drop of rabbit frictional resistance hour pressure transducer be difficult to tell passing through of rabbit.In addition, prior art detection liquid plug can not effectively combine with pigging.
The utility model content
The utility model provides a kind of device that detects rabbit in the experiment of gas-liquid two-phase flow liquid plug and pigging, detects to solve prior art that rabbit detects inconvenience in gas-liquid two-phase flow liquid plug and the pigging experiment, it is complicated to install, measures rabbit in out of true, liquid plug and the pigging experiment and can not effectively combine the problem that detects.
For this reason, the utility model proposes a kind of device that detects rabbit in gas-liquid two-phase flow liquid plug and the pigging experiment, comprising:
Infrared transmitting device is installed in outside the testing tube;
Infrared receiver is installed in testing tube and is connected outward and with the infrared transmitting device signal; Infrared transmitting device and infrared receiver are installed in the both sides of testing tube respectively and all are positioned at horizontal plane with said testing tube;
Laser beam emitting device is installed in outside the testing tube;
Laser receiver is installed in testing tube and is connected outward and with the laser beam emitting device signal;
Testing circuit is installed in outside the testing tube, and said infrared receiver and laser receiver are connected in parallel on the said testing circuit.
Further, said infrared transmitting device is an infrared light emitting diode.
Further, said infrared receiver is an infrared receiver diode.
Further, said laser receiver is photoresistance.
Further, said laser beam emitting device and laser receiver are installed in the both sides up and down of testing tube respectively, and the line vertical checkout pipe of said laser beam emitting device and laser receiver.
Further, the line vertical checkout pipe of said infrared transmitting device and infrared receiver.
Further, detect the device of rabbit in the experiment of gas-liquid two-phase flow liquid plug and pigging, also comprise: the data collecting plate card that is connected with testing circuit.
Further, detect the device of rabbit in the experiment of gas-liquid two-phase flow liquid plug and pigging, also comprise: with the computer of data acquisition board card connection.
Further, said infrared transmitting device is the device that sends the 940nm IR wavelength.
Further, said infrared transmitting device, infrared receiver, said laser beam emitting device and laser receiver are positioned at a plane.
The utility model utilizes infrared transmitting device and infrared receiver to detect the liquid plug; Utilize said laser receiver and laser receiver to detect rabbit, need not installation and measuring device in testing tube, easy for installation; The detection effect is accurate, can not influence flowing of testing tube inner fluid.The infrared frequency is high, can judge accurately that liquid plug, rabbit arrive, leave the time of detecting device.
And then; The utility model collection infrared transmitting device and infrared receiver detect the liquid plug; With utilize said laser receiver and laser receiver to detect two kinds of functions of rabbit to be one, infrared ray and laser are used and can detect pigging liquid plug and rabbit in the pigging process.In being connected of liquid plug and pigging process, can realize the seamless connection that liquid plug and rabbit detect, need not in experimentation, to reinstall pick-up unit, improved efficient, practiced thrift the time.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram according to the device of rabbit in the detection gas-liquid two-phase flow liquid plug of the utility model embodiment and the pigging experiment;
Fig. 2 is the structure of Fig. 1 middle infrared (Mid-IR) emitter, infrared receiver, laser beam emitting device and laser receiver;
Fig. 3 is infra-red intensity wave pattern under the device to test slug flow that uses the utility model embodiment;
Fig. 4 passes through laser detection rabbit front and back induced voltage figure for rabbit.(embodying) with induced voltage figure
The front and back infra-red intensity wave pattern that Fig. 5 passes through for the device to test rabbit that uses the utility model embodiment (embodying) with induced voltage figure;
The drawing reference numeral explanation:
10, testing tube 20, laser beam emitting device 30, laser receiver 40, infrared transmitting device
50, infrared receiver 60, testing circuit 70, data collecting plate card 80, computer
90, power supply 13, liquid plug 15, rabbit
Embodiment
Understand for technical characterictic, purpose and effect to the utility model have more clearly, contrast the embodiment of description of drawings the utility model at present.
As depicted in figs. 1 and 2; Device according to rabbit in the detection gas-liquid two-phase flow liquid plug of the utility model embodiment and the pigging experiment comprises: be installed in testing tube 10 outer infrared transmitting device 40, infrared receiver 50, laser beam emitting device 20, laser receiver 30 and testing circuit 60.Testing tube 10 is transparent, is plexi-glass tubular for example, so that infrared ray passes.
Laser beam emitting device 20, emission laser, laser beam emitting device is a semiconductor laser tube for example, and cost is low like this, and volume is little.
For example; Semiconductor laser tube emission laser, photoresistance receive laser and change self resistance according to light intensity, and testing circuit 60 changes the change in resistance of photoresistance into change in voltage output; The light intensity that photoresistance receives is big more; The induced voltage of testing circuit output is big more, and when laser was interdicted, induced voltage dropped to minimum value.So not only cost is low, and volume is little, and can be electric signal with the conversion of signals that laser beam emitting device sends, and is convenient to analyze.
The experimental provision of the utility model is simple, and is easy to operate, cheap, accurate to mobile nothing influence and result in the pipeline.
Further, as depicted in figs. 1 and 2, said laser beam emitting device 20 and laser receiver 30 are installed in the both sides up and down of testing tube 10 respectively, and the line vertical checkout pipe 10 of said laser beam emitting device 20 and laser receiver 30.Like this, laser signal receives better.
Further, the line vertical checkout pipe of said infrared transmitting device 40 and infrared receiver 50.Like this, infrared signal receives better.
Further, said infrared transmitting device 40, infrared receiver 50, said laser beam emitting device 20 are positioned at a plane with laser receiver 30.Like this; Can realize the linking that rabbit 15 detects in the experiment of liquid plug 13 and pigging; Accurately obtain the time that rabbit passes through, and infrared transmitting device, infrared receiver and laser beam emitting device and laser receiver apart from each other, avoided interference mutual on the space.
Further, detect the device of rabbit in the experiment of gas-liquid two-phase flow liquid plug and pigging, also comprise: the data collecting plate card 70 that is connected with testing circuit 60.Like this, be convenient to the collection of voltage data, can access rich data.
Further, detect the device of rabbit in the experiment of gas-liquid two-phase flow liquid plug and pigging, also comprise: the computer 80 that is connected with data collecting plate card 70.Computer can display voltage, can also carry out depth analysis, like this, is convenient to analysis, contrast, data are preserved and detect in real time.
Detect the device of rabbit in the experiment of gas-liquid two-phase flow liquid plug and pigging, also comprise: power supply for example is a direct supply, for testing circuit 60, computer 80 and other devices provide electric power supply.
The once principle of work and the process of the utility model are described below:
The principle of infrared detection liquid plug and rabbit is: infrared ray can penetrate transparent pipeline and fluid, can not penetrate rabbit, gas phase to ultrared attenuation degree greater than liquid phase.When liquid plug process detecting device; Detected infra-red intensity is low, and induced electricity forces down, and air mass is through out-of-date; Detected infra-red intensity is low; Induced voltage is high, and infrared induction voltage is the moment that the liquid plug arrives by the moment that noble potential sports electronegative potential, the moment of being uprushed and being left for the liquid plug for the moment of noble potential by electronegative potential.When rabbit passes through; Infrared ray is cut off, and induced voltage is 0, can be moment of 0 to confirm the moment that rabbit passes through according to induced voltage; But owing to containing more bubble in liquid chock plug, the tail; Fluctuate in gas-liquid and to cause infrared ray seriously to decay sometimes when violent, causing induced electricity is 0, and rabbit is caused interference through detection.
Laser is visible light, can penetrate transparent pipeline and fluid, and the attenuation coefficient difference is very little in gas-liquid, receive the gas-liquid boundary wave moving influence less.Ducted when flowing for proper flow, induced voltage fluctuation at the high potential place, rabbit through the time, laser is interdicted, the induced voltage bust, after rabbit left, induced voltage was uprushed.In whole pigging process, the moment of laser detector induced voltage bust is the moment that rabbit arrives detector.
In slug flow, liquid plug and long air mass alternately appear on the pipeline interface, and as can be seen from Figure 3, under the slug flow flow pattern, high, two peak values appear in infra-red intensity.Peak value is the process of air mass through detecting device; Low peak is the process of liquid plug through detecting; Can occur one than low value when changing between the high low peak, this is that bubble is bigger to the infrared ray decay owing in the intersection liquid plug of air mass and liquid plug, contain more bubble.The moment that infra-red intensity is fallen sharply by peak value is the moment that liquid enters detecting device, and intensity has just been arrived peak value by low peak the moment is left the moment of detecting device for the liquid plug.
As can be seen from Figure 4, when in pipeline, carrying out the gas-liquid two-phase pigging, before and after rabbit arrives detecting device; Laser induced voltage fluctuates in the higher position, when rabbit passes through, and the induced voltage bust; This inductive voltage value is the minimum value in the logical ball process; Therefore in experiment, minimum induced voltage moment corresponding is the time that rabbit arrives detecting device, and the moment that voltage is begun to rise by minimum value is the time that rabbit leaves detecting device.
As can be seen from Figure 5, when in pipeline, carrying out the gas-liquid two-phase pigging, before and after rabbit arrived detecting device, detected infra-red intensity was all greater than 0, and when rabbit arrived, infrared ray was blocked fully, and detected infra-red intensity is 0.Infra-red intensity is 0 constantly to be the time that rabbit arrives detecting device, and infra-red intensity is the time that rabbit leaves detecting device greater than moment of 0 again.
The utility model has enlarged ultrared application, the use infrared method can be at the outside installation and measuring equipment of pipeline; Do not influence in the pipe and flow; Do not influence passing through of rabbit in the pipeline, enriched the pigging experimental test data, experimental provision is simple, easy to operate, cheap, accurate to mobile nothing influence and result in the pipeline.
The above is merely the schematic embodiment of the utility model, is not in order to limit the scope of the utility model.For each ingredient of the utility model can make up under the condition of not conflicting each other; Any those skilled in the art; Equivalent variations of under the prerequisite of design that does not break away from the utility model and principle, having done and modification all should belong to the scope that the utility model is protected.
Claims (10)
1. a device that detects rabbit in gas-liquid two-phase flow liquid plug and the pigging experiment is characterized in that, the device of rabbit comprises in said detection gas-liquid two-phase flow liquid plug and the pigging experiment:
Infrared transmitting device is installed in outside the testing tube;
Infrared receiver is installed in testing tube and is connected outward and with the infrared transmitting device signal; Infrared transmitting device and infrared receiver are installed in the both sides of testing tube respectively and all are positioned at horizontal plane with said testing tube;
Laser beam emitting device is installed in outside the testing tube;
Laser receiver is installed in testing tube and is connected outward and with the laser beam emitting device signal;
Testing circuit is installed in outside the testing tube, and said infrared receiver and laser receiver are connected in parallel on the said testing circuit.
2. the device of rabbit is characterized in that said infrared transmitting device is an infrared light emitting diode in detection gas-liquid two-phase flow liquid plug as claimed in claim 1 and the pigging experiment.
3. the device of rabbit is characterized in that said infrared receiver is an infrared receiver diode in detection gas-liquid two-phase flow liquid plug as claimed in claim 1 and the pigging experiment.
4. the device of rabbit is characterized in that said laser receiver is photoresistance in detection gas-liquid two-phase flow liquid plug as claimed in claim 1 and the pigging experiment.
5. the device of rabbit in detection gas-liquid two-phase flow liquid plug as claimed in claim 1 and the pigging experiment; It is characterized in that; Said laser beam emitting device and laser receiver are installed in the both sides up and down of testing tube respectively, and the line vertical checkout pipe of said laser beam emitting device and laser receiver.
6. the device of rabbit is characterized in that the line vertical checkout pipe of said infrared transmitting device and infrared receiver in detection gas-liquid two-phase flow liquid plug as claimed in claim 5 and the pigging experiment.
7. the device of rabbit is characterized in that in detection gas-liquid two-phase flow liquid plug as claimed in claim 1 and the pigging experiment, also comprises: the data collecting plate card that is connected with testing circuit.
8. the device of rabbit is characterized in that in detection gas-liquid two-phase flow liquid plug as claimed in claim 7 and the pigging experiment, also comprises: with the computer of data acquisition board card connection.
9. the device of rabbit is characterized in that said infrared transmitting device is the device that sends the 940nm IR wavelength in detection gas-liquid two-phase flow liquid plug as claimed in claim 1 and the pigging experiment.
10. the device of rabbit is characterized in that said infrared transmitting device, infrared receiver, said laser beam emitting device and laser receiver are positioned at a plane in detection gas-liquid two-phase flow liquid plug as claimed in claim 6 and the pigging experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200248751U CN202486333U (en) | 2012-01-18 | 2012-01-18 | Device for detecting gas-liquid two-phase liquid-flow plug and pig in pigging test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200248751U CN202486333U (en) | 2012-01-18 | 2012-01-18 | Device for detecting gas-liquid two-phase liquid-flow plug and pig in pigging test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202486333U true CN202486333U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200248751U Expired - Fee Related CN202486333U (en) | 2012-01-18 | 2012-01-18 | Device for detecting gas-liquid two-phase liquid-flow plug and pig in pigging test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202486333U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989942A (en) * | 2017-04-26 | 2017-07-28 | 中国海洋石油总公司 | A kind of wiper performance and pigging measure of merit device and method |
| CN114011811A (en) * | 2021-10-29 | 2022-02-08 | 国家石油天然气管网集团有限公司 | Pipe cleaner exhaust method in continuous large-drop and U-shaped liquid pipeline production process |
-
2012
- 2012-01-18 CN CN2012200248751U patent/CN202486333U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989942A (en) * | 2017-04-26 | 2017-07-28 | 中国海洋石油总公司 | A kind of wiper performance and pigging measure of merit device and method |
| CN106989942B (en) * | 2017-04-26 | 2019-04-09 | 中国海洋石油集团有限公司 | A kind of pipe cleaner performance and pigging measure of merit device and method |
| CN114011811A (en) * | 2021-10-29 | 2022-02-08 | 国家石油天然气管网集团有限公司 | Pipe cleaner exhaust method in continuous large-drop and U-shaped liquid pipeline production process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20130118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |