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Steel pipeline defect magnetic three-component combined detection and identification method

A technology that combines detection and identification methods, applied in the direction of material magnetic variables, etc., to achieve the effect of improving the application effect, rapid identification and positioning, and improving the level of integrity management

Pending Publication Date: 2021-06-25
中海石油技术检测有限公司
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Problems solved by technology

[0005] In order to solve the technical problems in the known technology, the present invention provides a steel pipeline defect magnetic three-component combination detection and identification method, which can effectively predict the position of the pipeline force and magnetic anomaly in a complex environment, and then identify the steel pipeline defect location

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  • Steel pipeline defect magnetic three-component combined detection and identification method
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  • Steel pipeline defect magnetic three-component combined detection and identification method

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[0028] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0029] see Figure 1 to Figure 7 , a steel pipeline defect magnetic three-component combination detection and identification method, the method uses the following steps to obtain the abnormal characteristic value of the combined magnetic anomaly of the pipeline:

[0030] Step 1: Use the TSC-5M-32 Stress Concentration Magnetic Detector to measure the magnetic field intensity along the direction of the pipeline, and obtain the distribution curve of the magnetic three-component Hx, Hy, and Hz, please refer to figure 2 . Export the raw data through the MMM-system software to obtain the map, and then use the software to convert the map into tabular data.

[0031] Step 2: Correct and denoise the magnetic three-component data obtained from the me...

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Abstract

The invention discloses a steel pipeline defect magnetic three-component combined detection and identification method, which comprises the following steps: 1, employing a TSC-5M-32 stress concentration magnetic detector to measure the magnetic field intensity along the direction of a pipeline to obtain a distribution change curve of three magnetic components Hx, Hy and Hz; exporting the original data to obtain an atlas, and then converting the atlas into table data; 2, performing correction and denoising processing on the magnetic three-component data obtained by measurement to obtain effective data; 3, calculating a combined magnetic anomaly by adopting the effective data obtained in the step 2; and 4, extracting an abnormal characteristic value of the combined magnetic abnormal quantity, acquiring a corresponding relation between a model defect position and an abnormal characteristic value by establishing a model, and predicting the position of the pipeline defect according to the abnormal characteristic value of the pipeline combined magnetic abnormal quantity by referring to the corresponding relation of the model. The method can effectively pre-judge the position of the magnetic force anomaly of the pipeline in a complex environment, and further identifies the defect position of the steel pipeline.

Description

technical field [0001] The invention relates to the technical field of pipeline detection, in particular to a method for combined detection and identification of magnetic three-component defects in steel pipelines. Background technique [0002] Long-distance pipeline transportation has the characteristics of less one-time investment, good sealing, cost saving, and high degree of automation. It is suitable for transporting flammable and explosive oil, natural gas, etc. my country's submarine pipelines have been laid and operated for more than 30 years. With the increase of the service life of submarine pipelines, some submarine pipelines have entered the later stage of frequent accidents. The main reasons for the failure of submarine pipelines are: internal and external corrosion and third-party damage. In recent years, with the application of detection technology inside the sea pipe, the trend of frequent sea pipe accidents caused by internal and external corrosion has been ...

Claims

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Application Information

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IPC IPC(8): G01N27/85
CPCG01N27/85
Inventor 曲杰胡祥云薛建刘双卢进王怀江唐建华陈秋华倪先峰樊荣兴杨建华
Owner 中海石油技术检测有限公司
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