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Non-magnetization pipeline-interior detection method

A detection method and a non-magnetized technology, applied in the direction of material magnetic variables, etc., can solve the problems of expensive internal detection equipment, cumbersome process, a large number of blind excavations restricting large-scale promotion, etc., to achieve easy on-site implementation, simplify the detection process, The effect of reducing the missed detection rate

Inactive Publication Date: 2014-10-29
四川昇赛尔科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly uses internal detection, and the use of internal detection equipment is expensive, and the pipeline needs to be cleaned and degaussed, and the pipeline must be uniformly magnetized. The pipeline conditions do not have the possibility of a large number of blind excavations, thus limiting its large-scale promotion

Method used

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Embodiment Construction

[0030] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features that are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0032] Cleaner among the present invention, non-contact scanning magnetometer and gyroscope etc. all adopt existing equipment.

[0033] Step 1. Preliminary analysis to determine the construction period

[0034] Check and analyze the pipeline design, pipeline operation and operation documents in the area to be tested, determine the size of the available pigs according to the size and characteristics of the pipeline, and select a suitable cleaner to determine the loc...

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Abstract

The invention discloses a non-magnetization pipeline-interior detection method which relates to a damage detecting technology of buried metal pipelines for petroleum and natural gas. The non-magnetization pipeline-interior detection method comprises the following steps: (1) performing preliminary analysis to determine the construction duration; (2) testing the passing performance of a pipeline; (3) detecting the pipeline; (4) analyzing and processing detection data; and (5) processing data results. The non-magnetization pipeline-interior detection method overcomes various disadvantages, such as the cumbersome process of blind excavation is carried out for clearing and demagnetizing the pipeline and the final uniform magnetization is carried out on the pipeline, in an existing method for detecting local defects inside the pipeline by virtue of magnetization; according to the non-magnetization pipeline-interior detection method, the pipeline is uniformly magnetized by virtue of an earth magnetic field, and the non-magnetization and non-contact detection on the interior of the pipeline can be accomplished just by means of testing the passing performance and simply cleaning the interior of the pipeline by a pipeline cleaner so as to suck metal substances out of the pipeline by a magnet.

Description

technical field [0001] The invention relates to a damage detection technology for buried metal pipelines of petroleum and natural gas, in particular to a non-contact detection magnetic force tomography technology damage detection method for non-magnetization inside the pipe. Background technique [0002] At present, the method of contact detection of local defects of pipelines is generally used to detect local defects of pipelines. It mainly uses professional detection equipment (internal inspection flaw detector) to record the magnetic field stress defects of pre-magnetized pipelines. The method includes cleaning equipment and internal inspection flaw detector, flushing and cleaning the inside of the pipeline and ensuring the complete smoothness of the section, allowing the flaw detector to pass through while magnetizing the pipe wall, recording and storing the magnetic field anomaly according to the dispersed and saturated magnetic field, and interpreting the obtained Acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82
Inventor 余杰
Owner 四川昇赛尔科技有限公司
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