High-temperature super heavy oil pipeline magnetic flux leakage internal detection method and device

Abstract

The invention discloses a high-temperature super heavy oil pipeline magnetic flux leakage internal detection method and mechanism. The high-temperature super heavy oil pipeline magnetic flux leakage internal detection method comprises the steps that a preset amount of low-temperature fuel oil is input into a pipeline for conveying high-temperature super heavy oil; and a detector for detecting whether the pipeline leaks or not is immersed in the low-temperature fuel oil, wherein the temperature of the whole conveying process of the low-temperature fuel oil is lower than a preset temperature, and the preset temperature is the highest temperature of normal work of the detector. The detector is placed in a fuel oil section to be conveyed. The problem that the standing cooling time is long is solved, and the risk of cooling conveying pipe condensation is avoided. On the premise that the pipe conveying safety is ensured, high-temperature long-distance super heavy oil conveying pipeline detection is achieved, the pipeline defect condition is obtained, and the problem that the detector loses efficacy under the high-temperature fluid condition is solved. The high-temperature super heavy oilpipeline magnetic flux leakage internal detection mechanism can complete input of low-temperature fuel oil, the input low-temperature fuel oil can be normally conveyed, and it is guaranteed that themagnetic flux leakage internal detector does not fail.

Description

technical field [0001] The invention relates to the technical field of pipeline detection, and more specifically relates to a method and device for internal detection of magnetic flux leakage in high-ultra heavy oil pipelines. Background technique [0002] In the conventional internal detection of magnetic flux leakage of the pipeline body, cooling transportation is often used to transport crude oil at a temperature lower than that of the detector. Detector fails to detect defects in the pipeline. [0003] To sum up, how to ensure that the detector will not fail during the transmission process so as to detect the leakage of the pipeline is an urgent problem to be solved by those skilled in the art. Contents of the invention [0004] In view of this, the object of the present invention is to provide a method and mechanism for internal detection of magnetic flux leakage in high-temperature ultra-heavy oil pipelines, which can ensure that the detector will not fail during th...

AI Technical Summary

Problems solved by technology

[0002] In the conventional internal detection of magnetic flux leakage of the pipeline body, cooling transportation is often used to transport crude oil at a temperature lower than that of the detector. Detector failure, unable to detect defects in the pipeline

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