CN117404613A - Quick positioning method for leakage of buried oil pipeline - Google Patents
Quick positioning method for leakage of buried oil pipeline Download PDFInfo
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- CN117404613A CN117404613A CN202311523678.3A CN202311523678A CN117404613A CN 117404613 A CN117404613 A CN 117404613A CN 202311523678 A CN202311523678 A CN 202311523678A CN 117404613 A CN117404613 A CN 117404613A
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- buried oil
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 58
- 230000008859 change Effects 0.000 claims abstract description 27
- 238000005516 engineering process Methods 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims description 48
- 230000007797 corrosion Effects 0.000 claims description 32
- 230000002159 abnormal effect Effects 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 12
- 238000009412 basement excavation Methods 0.000 claims description 7
- 238000004210 cathodic protection Methods 0.000 claims description 6
- 238000012795 verification Methods 0.000 claims description 4
- 230000006870 function Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002136 electrolytic conductivity detection Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- 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
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention provides a quick positioning method for leakage of a buried oil pipeline, which comprises the following steps: step S100, measuring the change of the alternating current ground potential gradient in the soil by adopting an alternating current ground potential gradient method so as to detect the damage position of the buried oil pipeline anticorrosive layer of the leakage pipe section; wherein, the damage position of the buried oil pipeline anticorrosive coating comprises a plurality of damage points; step S200, detecting magnetic memory signals within a preset length range of each damage point by utilizing a metal magnetic memory detection technology, and drawing a magnetic memory signal curve; and step S300, determining whether the damage point is a leakage point according to the magnetic memory signal curve. The invention has the technical effects that the design is reasonable, the leakage point of the buried oil pipeline can be rapidly and accurately positioned under the condition of not excavating, and the operation is simple.
Description
Technical Field
The invention belongs to the technical field of petroleum detection, and particularly relates to a quick positioning method for leakage of a buried oil pipeline.
Background
With the rapid development of national economy, subways are rapidly developed as important transportation means in cities. At present, over twenty airports open subways in China, the risk of corrosion of direct current stray current generated by the subways to airport oil pipelines is more and more serious, under the condition that no direct current stray current interference protection measures are taken, serious corrosion can possibly occur at the damaged part of an anti-corrosion layer of the subway along the oil pipelines, and researches show that under certain conditions, corrosion perforation can occur on a steel pipeline with the thickness of 8-9mm within two and three months. In order to ensure the normal operation of an airport, the leakage point of the oil pipeline needs to be quickly found, and the pipeline needs to be repaired as soon as possible, so that the operation of the pipeline is restored.
The method for monitoring the leakage of the pipeline body is relatively mature, and one is a direct method, namely a detection element (such as a leakage detection cable or an oil sensitive element) which is preset outside the pipeline is utilized to directly detect leakage medium and can be positioned; the other is an indirect monitoring system based on the negative pressure wave technology, and when a large leakage amount occurs to the pipeline, the method can rapidly calculate the leakage position of the pipeline. However, both methods require that related elements are arranged on the pipeline in advance, and if the related elements are not arranged, the related elements cannot be implemented, so that the operation is very inconvenient.
In addition, when the pipeline leaks, the electronic leakage detector and the correlation detector can also detect the acoustic wave signals of the pipeline leakage to position the leakage point. However, the pipeline conveying work can be stopped immediately after the problem of leakage is found in the aviation pipeline, at the moment, the leakage point can be gradually stopped from leakage, and the detection time is very short, and the airplane taking off and landing around the airport and the subway and the automobile have large running noise, so that the detection is greatly interfered, and the inaccurate detection result is easily caused.
Disclosure of Invention
The invention aims at solving at least one of the technical problems in the prior art and provides a novel technical scheme of a quick positioning method for leakage of a buried oil pipeline.
According to one aspect of the invention, there is provided a method for rapidly locating leakage of a buried oil pipeline, comprising the steps of:
step S100, measuring the change of the alternating current ground potential gradient in the soil by adopting an alternating current ground potential gradient method so as to detect the damage position of the buried oil pipeline anticorrosive layer of the leakage pipe section; wherein, the damage position of the buried oil pipeline anticorrosive coating comprises a plurality of damage points;
step S200, detecting magnetic memory signals within a preset length range of each damage point by utilizing a metal magnetic memory detection technology, and drawing a magnetic memory signal curve;
and step S300, determining whether the damage point is a leakage point according to the magnetic memory signal curve.
Optionally, determining whether the damage point is a leakage point according to the magnetic memory signal curve includes:
when the magnetic field intensity of the magnetic memory signal curve at a certain breakage point changes steadily, the breakage point is not leaked; when the change amplitude of the magnetic field intensity of the magnetic memory signal curve at a certain breakage point is larger than 100A/m, the breakage point is a leakage point.
Optionally, the length of the leakage pipe section is 200m; the preset length range is 10m.
Optionally, dividing a starting point and an ending point of detection of each breakage point to determine a preset length range of the breakage point; wherein, the distance between the starting point and the end point is 5m from the breakage point, and the distance between the starting point and the end point is 10m.
Optionally, in step S100, measuring a change in an alternating current ground potential gradient in the soil by a pipe corrosion protection layer detector; the measuring method of the pipeline corrosion-resistant layer detector is an alternating current ground potential gradient method.
Optionally, measuring the change of the ac ground potential gradient in the soil by adopting the ac ground potential gradient method to detect the damaged position of the buried oil pipeline anticorrosive layer of the leakage pipe section, including:
connecting a pipeline anti-corrosion layer detector carrying ACVG detection technology with a pipeline;
starting up a pipeline anti-corrosion layer detector, detecting an alternating current voltage gradient abnormal region on a pipeline by using an ACVG function, and marking the alternating current voltage gradient abnormal region on the ground; wherein, the abnormal region of the alternating voltage gradient is the damaged position of the buried oil pipeline anticorrosive coating.
Optionally, inserting a plastic pipe into the alternating voltage gradient abnormal region to perform ground identification on the alternating voltage gradient abnormal region.
Optionally, the pipeline corrosion protection layer detector carrying ACVG detection technology is connected with a pipeline, and includes:
electrically connecting a pipeline anti-corrosion layer detector carrying an ACVG detection technology with a pipeline cathode protection test pile or a pipeline valve well; the pipeline cathodic protection test pile or the pipeline valve well is positioned near the pipeline and is electrically connected with the pipeline.
Optionally, the method for quickly positioning the leakage of the buried oil pipeline further comprises the following steps:
and step S400, performing excavation verification on the leakage points.
Optionally, in step S200, detecting a magnetic memory signal of the damaged position by a metal magnetic memory detector; the detection method of the metal magnetic memory detector is a metal magnetic memory detection method.
The invention has the technical effects that:
in the embodiment of the application, firstly, the alternating current ground potential gradient method is adopted to measure the change of the alternating current ground potential gradient in the soil so as to detect the damage position of the buried oil pipeline anticorrosive layer of the leakage pipe section, thereby greatly reducing the detection range of the damage point and being beneficial to improving the detection efficiency; then, detecting magnetic memory signals within a preset length range of each damage point by utilizing a metal magnetic memory detection technology, and drawing a magnetic memory signal curve; and finally, determining whether the damaged point is a leakage point according to the magnetic memory signal curve, thereby being beneficial to quickly and accurately positioning the leakage point of the buried oil pipeline.
Therefore, the quick positioning method for the leakage of the buried oil pipeline can realize quick and accurate positioning of the leakage point of the buried oil pipeline under the condition of no excavation, not only avoids the problem that related elements are required to be arranged in advance in the traditional technology, but also avoids the problem that the quick and accurate positioning of the leakage point cannot be realized due to the limitation of detection conditions and detection environments, and has accurate detection results.
Drawings
FIG. 1 is a schematic flow chart of a method for rapidly positioning leakage of a buried oil pipeline according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a strong change of magnetic field intensity of a magnetic memory signal curve at a certain damage point in a method for rapidly positioning leakage of a buried oil pipeline according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a pipeline corrosion profile in a method for rapidly locating leakage of a buried oil pipeline according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
According to one aspect of the present invention, referring to fig. 1, there is provided a method for rapidly locating leakage of a buried oil pipeline, comprising the steps of:
step S100, measuring the change of the alternating current ground potential gradient in the soil by adopting an alternating current ground potential gradient method so as to detect the damage position of the buried oil pipeline anticorrosive layer of the leakage pipe section; wherein, the damaged position of buried oil pipeline anticorrosive coating includes a plurality of damaged points.
Step 200, detecting magnetic memory signals within a preset length range of each damage point by using a metal magnetic memory detection technology, and drawing a magnetic memory signal curve. The metal magnetic memory detection technology is a detection method based on the inverse magnetostriction effect (Vilary effect). The metal material can cause local magnetic susceptibility change under the conditions of corrosion, processing and stress, and the self leakage magnetic field reflects irreversible change of magnetization intensity in the action direction of working load main stress, so that the change condition of magnetic field intensity can be obtained through detection of magnetic memory signals.
And step S300, determining whether the damage point is a leakage point according to the magnetic memory signal curve.
In the embodiment of the application, firstly, the alternating current ground potential gradient method is adopted to measure the change of the alternating current ground potential gradient in the soil so as to detect the damage position of the buried oil pipeline anticorrosive layer of the leakage pipe section, thereby greatly reducing the detection range of the damage point and being beneficial to improving the detection efficiency; then, detecting magnetic memory signals within a preset length range of each damage point by utilizing a metal magnetic memory detection technology, and drawing a magnetic memory signal curve; and finally, determining whether the damaged point is a leakage point according to the magnetic memory signal curve, thereby being beneficial to quickly and accurately positioning the leakage point of the buried oil pipeline.
Therefore, the quick positioning method for the leakage of the buried oil pipeline can realize quick and accurate positioning of the leakage point of the buried oil pipeline under the condition of no excavation, not only avoids the problem that related elements are required to be arranged in advance in the traditional technology, but also avoids the problem that the quick and accurate positioning of the leakage point cannot be realized due to the limitation of detection conditions and detection environments, and has accurate detection results.
Under the condition that the buried oil pipeline adopts impressed current cathodic protection, an alternating current ground potential gradient method (namely ACVG detection technology) can be used for detecting the damage position of the corrosion-resistant layer of the buried oil pipeline, but whether corrosion occurs at the damage position of the corrosion-resistant layer of the buried oil pipeline cannot be detected. The magnetic memory signals in the preset length range of each damage point of the damage position are detected through the metal magnetic memory detection technology, so that the leakage point of the buried oil pipeline can be accurately acquired, the operation is simple, and the detection efficiency is high.
Optionally, determining whether the damage point is a leakage point according to the magnetic memory signal curve includes:
when the magnetic field intensity of the magnetic memory signal curve at a certain breakage point changes steadily, the breakage point is not leaked; when the change amplitude of the magnetic field intensity of the magnetic memory signal curve at a certain breakage point is larger than 100A/m, the breakage point is a leakage point. That is, whether the pipe section corresponding to the broken point has serious magnetic field intensity change is judged through the magnetic memory signal curve, and when the change amplitude of the magnetic field intensity is more than 100A/m, the serious magnetic field intensity change is indicated.
In the above embodiment, the determination of whether the damaged point is a leakage point is facilitated according to the change condition of the magnetic field intensity of the magnetic memory signal curve, and the detection efficiency is high.
Optionally, the length of the leakage pipe section is 200m, the length of the leakage pipe section is reasonably arranged, so that the detection length of the leakage pipe section is greatly reduced, and the accurate detection of leakage points is facilitated; the preset length range is 10m, which is helpful for rapidly positioning the leakage point according to the damage point.
Optionally, dividing a starting point and an ending point of detection of each breakage point to determine a preset length range of the breakage point; wherein, the distance between the starting point and the end point is 5m from the breakage point, and the distance between the starting point and the end point is 10m.
In the above embodiment, the starting point and the end point of the breakage point detection are divided, which is helpful for accurately detecting the specific condition of the breakage point and also for rapidly acquiring the leakage point.
Optionally, in step S100, measuring a change in an alternating current ground potential gradient in the soil by a pipe corrosion protection layer detector; the measuring method of the pipeline corrosion-resistant layer detector is an alternating current ground potential gradient method.
In the embodiment, the pipeline corrosion-resistant layer detector can accurately detect the change of the alternating current ground potential gradient in the soil, thereby being beneficial to obtaining the damage position of the buried oil pipeline corrosion-resistant layer of the leakage pipe section.
The model of the pipe corrosion protection layer detector may be PCMx or DM, for example.
When the ACVG detection is carried out by the pipeline anti-corrosion layer detector, an alternating current signal is applied to the buried oil pipeline through the transmitter, and a loop is formed through the buried oil pipeline, the ground and the grounding electrode. Because steel pipe is good conductor, the alternating current can flow in the pipeline to the distant place, and there is electric current flow pipeline in pipeline anticorrosive coating quality relatively poor and damaged position department, flows back to the earth electrode. At the damaged position of the anticorrosive coating, the resistance between the pipeline and the soil is relatively small, the outflow amount of current is large, and because the soil has a certain resistance, an alternating current voltage gradient field is displayed at the damaged point of the anticorrosive coating, and the alternating current voltage gradient value is larger as the alternating current voltage gradient field is closer to the damaged point of the anticorrosive coating, so that each damaged point of the anticorrosive coating of the buried oil pipeline is detected.
Optionally, measuring the change of the ac ground potential gradient in the soil by adopting the ac ground potential gradient method to detect the damaged position of the buried oil pipeline anticorrosive layer of the leakage pipe section, including:
connecting a pipeline anti-corrosion layer detector carrying ACVG detection technology with a pipeline;
starting up a pipeline anti-corrosion layer detector, detecting an alternating current voltage gradient abnormal region on a pipeline by using an ACVG function, and marking the alternating current voltage gradient abnormal region on the ground; wherein, the abnormal region of the alternating voltage gradient is the damaged position of the buried oil pipeline anticorrosive coating.
In the embodiment, the detection mode of the damage position of the anti-corrosion layer of the buried oil pipeline is simpler and is convenient to operate.
Optionally, inserting a plastic pipe into the alternating voltage gradient abnormal region to perform ground identification on the alternating voltage gradient abnormal region. This makes the ground sign very simple, convenient operation.
Optionally, the pipeline corrosion protection layer detector carrying ACVG detection technology is connected with a pipeline, and includes:
electrically connecting a pipeline anti-corrosion layer detector carrying an ACVG detection technology with a pipeline cathode protection test pile or a pipeline valve well; the pipeline cathodic protection test pile or the pipeline valve well is positioned near the pipeline and is electrically connected with the pipeline.
In the embodiment, the pipeline corrosion-resistant layer detector is electrically connected with the pipeline quickly, so that the change of the alternating current ground potential gradient in the soil near the pipeline is measured, and the damage position of the buried oil pipeline corrosion-resistant layer of the leakage pipeline section is detected quickly.
Optionally, the method for quickly positioning the leakage of the buried oil pipeline further comprises the following steps:
and step S400, performing excavation verification on the leakage points.
In the embodiment, the leakage points are excavated and verified, so that the leakage condition of the buried oil pipeline can be accurately acquired.
Optionally, in step S200, detecting a magnetic memory signal of the damaged position by a metal magnetic memory detector; the detection method of the metal magnetic memory detector is a metal magnetic memory detection method.
In the embodiment, the magnetic memory signal of the damaged position can be accurately detected by the metal magnetic memory detector, so that the leakage point can be acquired from the damaged position, and the positioning efficiency of the leakage point of the buried oil pipeline is greatly improved.
For example, the host computer of the metal magnetic memory detector can be TSC-9M-12, and the probe is 11-12W type.
In a specific embodiment, a certain buried steel product oil pipeline leaks, the accurate position of a leakage point is difficult to judge from the ground, and the leakage point is positioned without excavation by adopting the combination of an ACVG detection technology and a metal magnetic memory technology.
First, a cathodic protection test stake is provided about 400m upstream of the pipe section, and a power-up point is arranged at the cathodic protection test stake to connect with a pipeline corrosion-resistant layer detector. ACVG testing was performed on the 200m range of leak pipe sections using PCMx, as follows:
the first step: finding out a test line connected with the pipeline according to the wiring identification in the test pile;
and a second step of: connecting a white signal line of a transmitter of PCMx with a test line;
and a third step of: at the position 10m away from the pipeline, 4 steel drills with the length of 40cm are inserted into soil to serve as grounding electrodes and are connected in a bridging way; connecting a PCMx transmitter green signal line with a grounding electrode;
fourth step: starting up a transmitter of PCMx, regulating output current to 300mA, and selecting ELCD gear at output frequency (the output current frequency is 4Hz+8Hz+128 Hz);
fifth step: ACVG detection is started to be carried out by using a PCMx receiver and an A-type frame in the range of the leakage pipe section 200m, the position of a damaged point of the corrosion-resistant layer is determined, the ground is marked, and the pipeline trend of the pipe section is determined by using the PCMx.
Secondly, through detection, the signal intensity of the position of the pipe section with the corrosion-resistant layer breakage point 3 is 45dB, 39dB and 42dB respectively, and then in the range of 10m of the corrosion-resistant layer breakage point, the metal magnetic memory detector is used for carrying out metal magnetic memory detection, and the method specifically comprises the following steps:
the first step: dividing a detected starting point and a detected end point according to the position of the damaged point of the anti-corrosion layer detected by the ACVG, wherein the distance between the starting point and the end point and the damaged point of the anti-corrosion layer is 5m, and the distance between the starting point and the end point is 10m;
and a second step of: connecting the host with the probe, and starting up and preheating for 5min;
and a third step of: and starting metal magnetic memory detection right above the pipeline.
Through detection, the magnetic memory signals at the positions of the corrosion-resistant layer breakage point 1 and the corrosion-resistant layer breakage point 2 have no obvious change, and the magnetic memory signal at the corrosion-resistant layer breakage point 3 has a severe change, as shown in fig. 2.
Finally, the excavation verification is carried out on the damaged point 3 of the anti-corrosion layer, the corrosion morphology of the pipeline of the damaged point 3 of the anti-corrosion layer is shown in figure 3, the pipeline has corrosion pits with the diameter of about 15mm, the bottoms of the corrosion pits are perforated, and then the damaged point is a leakage point.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (10)
1. The quick positioning method for the leakage of the buried oil pipeline is characterized by comprising the following steps of:
step S100, measuring the change of the alternating current ground potential gradient in the soil by adopting an alternating current ground potential gradient method so as to detect the damage position of the buried oil pipeline anticorrosive layer of the leakage pipe section; wherein, the damage position of the buried oil pipeline anticorrosive coating comprises a plurality of damage points;
step S200, detecting magnetic memory signals within a preset length range of each damage point by utilizing a metal magnetic memory detection technology, and drawing a magnetic memory signal curve;
and step S300, determining whether the damage point is a leakage point according to the magnetic memory signal curve.
2. The method for quickly locating a leakage of a buried oil pipeline according to claim 1, wherein determining whether the damaged point is a leakage point according to the magnetic memory signal curve comprises:
when the magnetic field intensity of the magnetic memory signal curve at a certain breakage point changes steadily, the breakage point is not leaked; when the change amplitude of the magnetic field intensity of the magnetic memory signal curve at a certain breakage point is larger than 100A/m, the breakage point is a leakage point.
3. The method for quickly positioning leakage of a buried oil pipeline according to claim 1, wherein the length of the leakage pipe section is 200m; the preset length range is 10m.
4. The method for quickly positioning leakage of a buried oil pipeline according to claim 3, wherein a start point and an end point of detection of each broken point are divided to determine a preset length range of the broken point; wherein, the distance between the starting point and the end point is 5m from the breakage point, and the distance between the starting point and the end point is 10m.
5. The method for rapidly locating a leakage of a buried oil pipeline according to claim 1, wherein in step S100, a change of an ac ground potential gradient in soil is measured by a pipeline corrosion-resistant layer detector; the measuring method of the pipeline corrosion-resistant layer detector is an alternating current ground potential gradient method.
6. The method for rapidly positioning a buried oil pipeline leak according to claim 5, wherein measuring a change in an ac ground potential gradient in soil by an ac ground potential gradient method to detect a broken position of an anti-corrosive layer of the buried oil pipeline of the leak pipe section comprises:
connecting a pipeline anti-corrosion layer detector carrying ACVG detection technology with a pipeline;
starting up a pipeline anti-corrosion layer detector, detecting an alternating current voltage gradient abnormal region on a pipeline by using an ACVG function, and marking the alternating current voltage gradient abnormal region on the ground; wherein, the abnormal region of the alternating voltage gradient is the damaged position of the buried oil pipeline anticorrosive coating.
7. The method for quickly locating a leakage of a buried oil pipeline according to claim 6, wherein a plastic pipe is inserted into an abnormal alternating voltage gradient region to perform ground identification on the abnormal alternating voltage gradient region.
8. The method for quickly positioning leakage of a buried oil pipeline according to claim 6, wherein the step of connecting a pipeline corrosion protection layer detector carrying ACVG detection technology to the pipeline comprises:
electrically connecting a pipeline anti-corrosion layer detector carrying an ACVG detection technology with a pipeline cathode protection test pile or a pipeline valve well; the pipeline cathodic protection test pile or the pipeline valve well is positioned near the pipeline and is electrically connected with the pipeline.
9. The method for quickly locating a leakage of a buried oil pipeline according to claim 1, further comprising the steps of:
and step S400, performing excavation verification on the leakage points.
10. The method for quickly positioning leakage of a buried oil pipeline according to claim 1, wherein in step S200, a magnetic memory signal of the damaged position is detected by a metal magnetic memory detector; the detection method of the metal magnetic memory detector is a metal magnetic memory detection method.
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| CN202311523678.3A CN117404613A (en) | 2023-11-15 | 2023-11-15 | Quick positioning method for leakage of buried oil pipeline |
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| CN202311523678.3A CN117404613A (en) | 2023-11-15 | 2023-11-15 | Quick positioning method for leakage of buried oil pipeline |
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| CN202311523678.3A Pending CN117404613A (en) | 2023-11-15 | 2023-11-15 | Quick positioning method for leakage of buried oil pipeline |
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