Method for evaluating corrosion in buried pipeline

Abstract

The invention provides a method for evaluating corrosion in a buried pipeline. The method for evaluating the corrosion in the buried pipeline comprises the following steps of: preliminary evaluation of corrosion detection in the buried pipeline, indirect detection and evaluation of the corrosion in the buried pipeline, direct detection and evaluation of the corrosion in the buried pipeline, and validity evaluation of direct evaluation ICDA of the corrosion in the buried pipeline and reevaluation time determination. At present, many in-service pipelines of petroleum enterprises sequentially enter a frequent accident period and an important stage of maintenance and update. By the method for evaluating the corrosion in the buried pipeline, levels of safe operation management and technology of the buried pipeline are improved, economic loss of personnel and facilities due to sudden accidents can be reduced, and safe production is ensured; the application potential of the in-service old pipelines is fully exerted, and the service life of the pipelines is prolonged; reliability and economical efficiency of pipeline engineering construction and operation are improved, and petroleum production and engineering costs are reduced; and environmental destruction caused by the sudden accidents is slowed down.

Description

technical field [0001] The present invention relates to oil pipeline corrosion evaluation technology, in particular to land-buried oil and water medium pipeline internal corrosion evaluation technology, and specifically relates to a buried pipeline internal corrosion evaluation method. Background technique [0002] In order to ensure the safe operation of oil pipelines, the corrosion safety management and maintenance of in-service pipelines is becoming more and more important. Due to the safety hazards and accidents caused by internal corrosion in oil and gas fields and some long-distance pipelines, it is not appropriate to detect and deal with them, and the risk of safe operation of pipelines is relatively high. , which brings difficulties to pipeline corrosion safety management technology. [0003] In the existing technology, the direct detection and evaluation technology in liquid petroleum pipelines in the world is mainly aimed at oil pipelines with a water content below...

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Problems solved by technology

[0002] In order to ensure the safe operation of oil pipelines, the corrosion safety management and maintenance of in-service pipelines is becoming more and more important. Due to the safety hazards and accidents caused by internal corrosion in oil and gas fields and some long-distance pipelines, it is not appropriate to detect and deal with them, and the risk of safe operation of pipelines is relatively high. , which brings difficulties to pipeline corrosion safety management technology

[0003] In the existing technology, the direct detection and evaluation technology in liquid petroleum pipelines in the world is mainly aimed at oil pipelines with a water content below 5%, while the pipelines with serious internal corrosion in my country's oil companies are oil production, sewage and water injection pipelines in oil fields, so the international The in-pipeline direct evaluation technique on the

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