CN109780447A - A method for detecting blockages in pressure pipelines using pulsed pressure waves - Google Patents
A method for detecting blockages in pressure pipelines using pulsed pressure waves Download PDFInfo
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- CN109780447A CN109780447A CN201811627188.7A CN201811627188A CN109780447A CN 109780447 A CN109780447 A CN 109780447A CN 201811627188 A CN201811627188 A CN 201811627188A CN 109780447 A CN109780447 A CN 109780447A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000000903 blocking effect Effects 0.000 claims abstract description 50
- 230000035485 pulse pressure Effects 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000010355 oscillation Effects 0.000 claims description 22
- 238000004364 calculation method Methods 0.000 claims description 17
- 230000035939 shock Effects 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 210000001367 artery Anatomy 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
- Pipeline Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
一种使用脉冲压力波检测压力管道内堵塞情况的方法，属于管道检测技术领域。包括以下步骤：1利用电磁阀在压力管道入口处发射一段脉冲压力波；2在压力管道入口处设置高频动态压力传感器A，记录此处的脉冲压力波信号S1，在距离压力管道入口处L距离的位置设置高频动态压力传感器B，记录下此处的脉冲压力波信号S2；3分析S1和S2获得脉冲压力波传播速度C和脉冲压力波衰减系数η；4分析S2，获取堵塞情况。本发明通过快速开闭电磁阀在管道内主动发射一段脉冲压力波，分析其入射波和反射波中的有效信息，能准确判断堵塞段的个数和类型，并且可以获得堵塞位置、堵塞率和堵塞长度，操作简便，精度高。A method for detecting blockage in a pressure pipeline by using a pulse pressure wave belongs to the technical field of pipeline detection. It includes the following steps: 1. Use a solenoid valve to launch a pulse pressure wave at the inlet of the pressure pipeline; 2. Set up a high-frequency dynamic pressure sensor A at the inlet of the pressure pipeline, record the pulse pressure wave signal S1 here, at the distance L from the inlet of the pressure pipeline. Set the high-frequency dynamic pressure sensor B at the distance, record the pulse pressure wave signal S2 here; 3 analyze S1 and S2 to obtain the pulse pressure wave propagation speed C and pulse pressure wave attenuation coefficient η; 4 analyze S2 to obtain the blockage. The invention actively emits a pulse pressure wave in the pipeline by rapidly opening and closing the electromagnetic valve, analyzes the effective information in the incident wave and the reflected wave, can accurately judge the number and type of the blocked section, and can obtain the blocking position, blocking rate and Blocking length, easy operation and high precision.
Description
Technical field
The present invention relates to pipeline inspection technology fields more particularly to a kind of detected in pressure pipeline using pulsed pressure wave to block up
Fill in the method for situation.
Background technique
With the in-depth that increasingly the exhausted and mankind utilize petrol resources exploitation of global fossil energy, the mankind are to oil gas
The exploitation of resource has gradually been transferred to ocean by land, therefore as most important oil-gas transportation mode, the mileage of submarine pipeline
Constantly increase, in the exploitation of marine oil and gas, the operation conditions of submarine pipeline is directly related to the safety of offshore oil and gas field, and manages
It road in the process of running, may be each due to the accumulation of the solids such as paraffin, pitch and the generation etc. of gas hydrates solid
Kind reason results in blockage；
After line clogging occurs, the detection of blocking position and chocking-up degree is fast implemented, timely de-plugging is to reduce blocking
Caused by economic loss become the more more and more urgent demand in oil company；Line clogging detection method common at present has sound wave inspection
The methods of survey, gamma rays detection and pressure signal analysis, the operating method of sonic detection is by the pairs of cloth of acoustic sensor
It is placed in monitoring section and forms array, when blocking in pipeline, the variation of cross section of fluid channel product can cause pressure oscillation, to generate
Sound wave, the sensor of bottleneck area two sides receive signal and are analyzed, determine blocking position, but this method be easy by
The interference of ambient noise influences the precision and accuracy of positioning；Gamma-rays method is using gamma-ray through characteristic to blocking position
It sets and is positioned, it is as a result more accurate, but the main limitation of this method is that when being blocked in submarine pipeline, operation is more numb
It is tired, higher cost；Pressure signal analytic approach is to judge to block with pipeline and event change feature according to manifold pressure signal
Position and chocking-up degree, this method is easy to operate, but detection accuracy is very poor.
Summary of the invention
For solve the problems, such as existing line clogging detection method be easy to be disturbed or higher cost or detection accuracy it is poor,
The present invention provides a kind of methods using stopping state in pulsed pressure wave detection pressure pipeline.
To achieve the above object, the technical solution adopted by the present invention is that: it is a kind of using pulsed pressure wave detect pressure pipeline
The method of interior stopping state, comprising the following steps:
(1) emit one section of pulsed pressure wave in pressure pipeline inlet using solenoid valve；
(2) high frequency dynamic pressure transducer A is set in pressure pipeline inlet, high frequency dynamic pressure transducer A is recorded
The pulsed pressure wave signal S1 of pressure pipeline inlet, in the position setting high frequency dynamic apart from pressure pipeline inlet L distance
Pressure sensor B, high frequency dynamic pressure transducer B record the pulse pressure at the position apart from pressure pipeline inlet L distance
Wave signal S2；
(3) analysis pulsed pressure wave signal S1 and pulsed pressure wave signal S2 obtains pulse velocity of wave propagation C and arteries and veins
Stamping press wave attenuation coefficient η；
(4) pulsed pressure wave signal S2 is analyzed, stopping state is obtained.
Further, the pulsed pressure wave is unimodal negative pressure wave, and width is less than 50ms, high frequency dynamic pressure transducer
The signal acquisition frequency of A and high frequency dynamic pressure transducer B are higher than 10khz.
Further, the analysis pulsed pressure wave signal S1 and pulsed pressure wave signal S2 is specially to obtain pulse
First incidence wave of wave signal S1 is D1, and first catastrophe point of D1 is denoted as characteristic point 1, then the time of characteristic point 1 is T1, D1
Pressure oscillation be most worth for P1；First incidence wave for obtaining pulsed pressure wave signal S2 is D2, and first catastrophe point of D2 is remembered
A little 2 are characterized, then the time of characteristic point 2 is T2, it is P that the pressure oscillation of D2, which is most worth,2。
Further, the acquisition pulse velocity of wave propagation C and pulsed pressure wave attenuation coefficient η are specifically by wave
Pulse velocity of wave propagation C is calculated in fast formula, and pulsed pressure wave attenuation coefficient is calculated by attenuation coefficient definition
η；The velocity of wave formula are as follows:
The attenuation coefficient is defined as:
Further, the step (4) specifically:
Occur the smaller back wave of pressure oscillation value after the incidence wave in S2, then occurs blocking section in pressure pipeline；
If back wave is single negative pulse pressure wave, stopping state is short blocking section occur；
If back wave is for single negative pulse pressure wave and followed by single positive pulse pressure wave, stopping state is
Now long blocking section.
Further, further include step (5) obtain blocking section blocking position be x, plugging rate S, when stopping state is
When there is long blocking section, obtaining blocking segment length is l；It is at this time D3, D3 by first negative pulse pressure wave that blocking section generates
First catastrophe point be denoted as characteristic point 3, then the time of characteristic point 3 be T3, it is P that the pressure oscillation of D3, which is most worth,3；Work as stopping state
When long blocking section occur, then first negative pulse pressure wave is followed by first positive pulse pressure wave, first positive arteries and veins
Punching press Reeb is D4, and first catastrophe point of D4 is denoted as characteristic point 4, then the time of characteristic point 4 is T4, the pressure oscillation of D4 is most worth
For P4。
Further, the calculation formula of the blocking position are as follows:
The calculation formula of the blocking segment length are as follows:
Further, the calculation formula of the plugging rate are as follows:
Wherein: k is that the pressure oscillation of back wave and incidence wave at blocking position is most worth ratio.
Further, the pressure oscillation of back wave and incidence wave is most worth the calculation formula of ratio at the blocking position are as follows:
Wherein XSFor shock wave stroke distances, e is natural constant.
Further, the calculation formula of the shock wave stroke distances are as follows:
Wherein: β is nonlinear factor, μ0For incidence wave particle movement speed, T is pulse wave width, and π is circumference
Rate.
The beneficial effects of the present invention are: actively emit one section of pulsed pressure wave in pipeline by rapidly opened and closed solenoid valve,
The effective information in its incidence wave and back wave, the number and type of energy accurate judgement blocking section are analyzed, and can be obtained stifled
Position, plugging rate and stemming length are filled in, easy to operate, precision is high.
Detailed description of the invention
Fig. 1 is the schematic diagram of pressure wave curve graph of the present invention.
Specific embodiment
A method of using stopping state in pulsed pressure wave detection pressure pipeline, which is characterized in that including following step
It is rapid:
(1) the rapidly opened and closed solenoid valve at entrance emits one section into pressure pipeline in pressure pipeline inlet
Pulsed pressure wave；
(2) high frequency dynamic pressure transducer A is set in pressure pipeline inlet, high frequency dynamic pressure transducer A is recorded
The pulsed pressure wave signal S1 of pressure pipeline inlet, in the position setting high frequency dynamic apart from pressure pipeline inlet L distance
Pressure sensor B, high frequency dynamic pressure transducer B record the pulse pressure at the position apart from pressure pipeline inlet L distance
Wave signal S2；Preferably, L takes 50m；
(3) pressure wave curve graph is established by pulsed pressure wave signal S1 and pulsed pressure wave signal S2, analyzes pulse pressure
Wave signal S1 and pulsed pressure wave signal S2 obtains pulse velocity of wave propagation C and pulsed pressure wave attenuation coefficient η；
(4) pulsed pressure wave signal S2 is analyzed, stopping state is obtained.
The pulsed pressure wave is unimodal negative pressure wave, and width is less than 50ms, and high frequency dynamic pressure transducer A and high frequency are dynamic
The signal acquisition frequency of state pressure sensor B is higher than 10khz.
The analysis pulsed pressure wave signal S1 and pulsed pressure wave signal S2 is specially to obtain pulsed pressure wave signal S1
First incidence wave be D1, D1 first catastrophe point (i.e. dynamic pressure signal start mutation inflection point) be denoted as characteristic point 1,
Then the time of characteristic point 1 is T1, it is P that the pressure oscillation of D1, which is most worth,1；Obtain pulsed pressure wave signal S2 first incidence wave be
First catastrophe point of D2, D2 are denoted as characteristic point 2, then the time of characteristic point 2 is T2, it is P that the pressure oscillation of D2, which is most worth,2；Use pressure
Reeb curve graph can be more intuitive, promotes working efficiency.
The acquisition pulse velocity of wave propagation C and pulsed pressure wave attenuation coefficient η is specifically by velocity of wave formula meter
Calculation obtains pulse velocity of wave propagation C, and pulsed pressure wave attenuation coefficient η is calculated by attenuation coefficient definition；The wave
Fast formula are as follows:
The attenuation coefficient is defined as:
Wherein: ln is natural logrithm symbol.
The step (4) specifically:
Occur the smaller back wave of pressure oscillation value after the incidence wave in S2, then occurs blocking section in pressure pipeline；
If back wave be single negative pulse pressure wave, illustrate that pipeline becomes smaller in a certain section of caliber, and this segment length compared with
It is short, it can determine whether stopping state to there is short blocking section；
If back wave illustrates pipeline at certain for single negative pulse pressure wave and followed by single positive pulse pressure wave
One section of caliber becomes smaller, and caliber becomes larger after crossing a distance, can determine whether stopping state to there is long blocking section；
If back wave is included as two or more combined forms of both the above situation, it can determine whether that stopping state is also
Two or more combined forms of both the above situation.
Further include step (5) obtain the blocking position of blocking section be x, plugging rate S, when stopping state is long blocking occur
Duan Shi, obtaining blocking segment length is l；The first negative pulse pressure wave reflection wave generated at this time by blocking section is D3, the of D3
One catastrophe point is denoted as characteristic point 3, then the time of characteristic point 3 is T3, it is P that the pressure oscillation of D3, which is most worth,3；When stopping state is
Now when long blocking section, then first negative pulse pressure wave is followed by first positive pulse pressure wave, first positive pulse pressure
Reeb is D4, and first catastrophe point of D4 is denoted as characteristic point 4, then the time of characteristic point 4 is T4, it is P that the pressure oscillation of D4, which is most worth,4。
The calculation formula of the blocking position are as follows:
The calculation formula of the blocking segment length are as follows:
The calculation formula of the plugging rate are as follows:
Wherein: k is that the pressure oscillation of back wave and incidence wave at blocking position is most worth ratio.
The pressure oscillation of back wave and incidence wave is most worth the calculation formula of ratio at the blocking position are as follows:
Wherein XSFor shock wave stroke distances, e is natural constant.
Pulsed pressure wave will form shock wave, the calculation formula of the shock wave stroke distances in communication process are as follows:
Wherein: β is nonlinear factor, μ0For incidence wave particle movement speed, T is pulse wave width, and π is circumference
Rate.
The method of the present embodiment is a kind of to be examined using pulse wave propagation characteristic to stopping state in pressure pipeline
The method of survey actively emits one section of pulsed pressure wave by rapidly opened and closed solenoid valve in pipeline, and the pulsed pressure wave is along pipeline
It is propagated, can be reflected when encountering blocking, then extracted its incident and reflection signal, analyze in its incidence wave and back wave
Effective information, thus accurate judgement blocking section number and type, be obtained by calculation blocking position, plugging rate and blocking length
Degree, easy to operate, precision is high.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline, which comprises the following steps:
(1) emit one section of pulsed pressure wave in pressure pipeline inlet；
(2) high frequency dynamic pressure transducer A is set in pressure pipeline inlet, high frequency dynamic pressure transducer A records pressure
High frequency dynamic pressure is arranged in the position apart from pressure pipeline inlet L distance in pulsed pressure wave signal S1 at entrance
Sensor B, high frequency dynamic pressure transducer B record the pulsed pressure wave at the position apart from pressure pipeline inlet L distance
Signal S2；
(3) analysis pulsed pressure wave signal S1 and pulsed pressure wave signal S2 obtains pulse velocity of wave propagation C and pulse pressure
Reeb attenuation coefficient η；
(4) pulsed pressure wave signal S2 is analyzed, stopping state is obtained.
2. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 1, special
Sign is that the pulsed pressure wave is unimodal negative pressure wave, and width is less than 50ms, and high frequency dynamic pressure transducer A and high frequency are dynamic
The signal acquisition frequency of state pressure sensor B is higher than 10khz, and pulsed pressure wave is quickly opened by solenoid valve in pressure pipeline inlet
Close generation.
3. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 1, special
Sign is that the analysis pulsed pressure wave signal S1 and pulsed pressure wave signal S2 is specially to obtain pulsed pressure wave signal S1's
First incidence wave is D1, and first catastrophe point of D1 is denoted as characteristic point 1, then the time of characteristic point 1 is T1, the pressure oscillation of D1
Most value is P1；First incidence wave for obtaining pulsed pressure wave signal S2 is D2, and first catastrophe point of D2 is denoted as characteristic point 2,
Then the time of characteristic point 2 is T2, it is P that the pressure oscillation of D2, which is most worth,2。
4. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 1, special
Sign is that the acquisition pulse velocity of wave propagation C and pulsed pressure wave attenuation coefficient η is calculated specifically by velocity of wave formula
Pulse velocity of wave propagation C is obtained, pulsed pressure wave attenuation coefficient η is calculated by attenuation coefficient definition；The velocity of wave
Formula are as follows:
The attenuation coefficient is defined as:
5. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 1, special
Sign is, the step (4) specifically:
Occur the smaller back wave of pressure oscillation value after the incidence wave in S2, then occurs blocking section in pressure pipeline；
If back wave is single negative pulse pressure wave, stopping state is short blocking section occur；
If back wave is for single negative pulse pressure wave and followed by single positive pulse pressure wave, stopping state is to grow
Block section.
6. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 1, special
Sign is, further include step (5) obtain the blocking position of blocking section be x, plugging rate S, when stopping state is long blocking occur
Duan Shi, obtaining blocking segment length is l；It is at this time D3 by first negative pulse pressure wave that blocking section generates, first of D3 is prominent
Height is denoted as characteristic point 3, then the time of characteristic point 3 is T3, it is P that the pressure oscillation of D3, which is most worth,3；When stopping state is long block up occur
When filling in section, then first negative pulse pressure wave is followed by first positive pulse pressure wave, first positive pulse pressure wave
First catastrophe point of D4, D4 are denoted as characteristic point 4, then the time of characteristic point 4 is T4, it is P that the pressure oscillation of D4, which is most worth,4。
7. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 6, special
Sign is, the calculation formula of the blocking position are as follows:
The calculation formula of the blocking segment length are as follows:
8. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 6, special
Sign is, the calculation formula of the plugging rate are as follows:
Wherein: k is that the pressure oscillation of back wave and incidence wave at blocking position is most worth ratio.
9. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 8, special
Sign is that the pressure oscillation of back wave and incidence wave is most worth the calculation formula of ratio at the blocking position are as follows:
Wherein XSFor shock wave stroke distances, e is natural constant.
10. a kind of method using stopping state in pulsed pressure wave detection pressure pipeline according to claim 9, special
Sign is, the calculation formula of the shock wave stroke distances are as follows:
Wherein: β is nonlinear factor, μ0For incidence wave particle movement speed, T is pulse wave width, and π is pi.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811627188.7A CN109780447B (en) | 2018-12-28 | 2018-12-28 | A method for detecting blockages in pressure pipelines using pulsed pressure waves |
| PCT/CN2019/119199 WO2020134702A1 (en) | 2018-12-28 | 2019-11-18 | Method for pressure pipe blocking status detection using pulse pressure wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811627188.7A CN109780447B (en) | 2018-12-28 | 2018-12-28 | A method for detecting blockages in pressure pipelines using pulsed pressure waves |
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| Publication Number | Publication Date |
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| CN109780447A true CN109780447A (en) | 2019-05-21 |
| CN109780447B CN109780447B (en) | 2020-11-06 |
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| WO (1) | WO2020134702A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134702A1 (en) * | 2018-12-28 | 2020-07-02 | 大连理工大学 | Method for pressure pipe blocking status detection using pulse pressure wave |
| CN113280266A (en) * | 2021-06-21 | 2021-08-20 | 上海天麦能源科技有限公司 | Urban gas medium-low pressure pipe network blockage diagnosis and positioning method and system |
| CN113551699A (en) * | 2021-09-17 | 2021-10-26 | 山东德仕化工有限公司 | Method and equipment for detecting blockage of oil well pipeline |
| CN113670512A (en) * | 2021-07-16 | 2021-11-19 | 国家石油天然气管网集团有限公司 | Pipe cleaner blockage detection method based on mold maximum single-scale correlation |
| CN113958287A (en) * | 2021-12-13 | 2022-01-21 | 德仕能源科技集团股份有限公司 | Oil well pipeline blockage removing method, equipment and medium based on artificial intelligence |
| EP3857175A4 (en) * | 2018-12-05 | 2022-06-22 | Halliburton Energy Services Inc. | DETECTION AND QUANTIFICATION OF LIQUID PODDLES IN FLUID HYDROCARBON PIPELINES |
| CN116821845A (en) * | 2023-06-20 | 2023-09-29 | 郑州大学 | Pipeline siltation diagnosis method and device based on multi-sensor data fusion |
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Cited By (11)
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|---|---|---|---|---|
| EP3857175A4 (en) * | 2018-12-05 | 2022-06-22 | Halliburton Energy Services Inc. | DETECTION AND QUANTIFICATION OF LIQUID PODDLES IN FLUID HYDROCARBON PIPELINES |
| US11525808B2 (en) | 2018-12-05 | 2022-12-13 | Halliburton Energy Services, Inc. | Detecting and quantifying liquid pools in hydrocarbon fluid pipelines |
| WO2020134702A1 (en) * | 2018-12-28 | 2020-07-02 | 大连理工大学 | Method for pressure pipe blocking status detection using pulse pressure wave |
| CN113280266A (en) * | 2021-06-21 | 2021-08-20 | 上海天麦能源科技有限公司 | Urban gas medium-low pressure pipe network blockage diagnosis and positioning method and system |
| CN113670512A (en) * | 2021-07-16 | 2021-11-19 | 国家石油天然气管网集团有限公司 | Pipe cleaner blockage detection method based on mold maximum single-scale correlation |
| CN113670512B (en) * | 2021-07-16 | 2023-08-18 | 国家石油天然气管网集团有限公司 | Pipe cleaner blocking detection method based on mode maximum single-scale correlation |
| CN113551699A (en) * | 2021-09-17 | 2021-10-26 | 山东德仕化工有限公司 | Method and equipment for detecting blockage of oil well pipeline |
| CN113551699B (en) * | 2021-09-17 | 2022-01-11 | 山东德仕化工有限公司 | Method and equipment for detecting blockage of oil well pipeline |
| CN113958287A (en) * | 2021-12-13 | 2022-01-21 | 德仕能源科技集团股份有限公司 | Oil well pipeline blockage removing method, equipment and medium based on artificial intelligence |
| CN113958287B (en) * | 2021-12-13 | 2022-04-05 | 德仕能源科技集团股份有限公司 | Oil well pipeline blockage removing method, equipment and medium based on artificial intelligence |
| CN116821845A (en) * | 2023-06-20 | 2023-09-29 | 郑州大学 | Pipeline siltation diagnosis method and device based on multi-sensor data fusion |
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| CN109780447B (en) | 2020-11-06 |
| WO2020134702A1 (en) | 2020-07-02 |
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