A method and measuring device for obtaining bending strain of a pipeline

Abstract

The invention discloses a pipeline bending strain obtaining method and measuring equipment. A three-dimensional route through which a pipeline mapping device passes through a pipeline to be measured is obtained; according to the three-dimensional route, the corresponding relation of a time vector and each coordinate axis in a three-dimensional coordinate system is obtained, wherein the three-dimensional route is a curve in the three-dimensional coordinate system; according to a curve computing model and the corresponding relation, the bending curvature of the pipeline to be measured is obtained; and according to the bending curvature of the pipeline to be measured, the bending strain of the pipeline to be measured is obtained.

Description

technical field [0001] The invention relates to the field of crude oil pipeline measurement, in particular to a method for obtaining bending strain of a pipeline and a measurement device. Background technique [0002] Long-distance pipelines have the advantages of large transmission capacity and low cost, and are the main way of oil and gas transportation. However, due to geological disasters such as earthquakes, landslides, floods, permafrost thawing, frost heave, and third-party damage, the pipeline will be displaced, resulting in regional or local bending strain of the pipeline. In severe cases, environmental loads will cause the pipeline to fold. It will affect the integrity of the pipeline. If it cannot be detected and repaired in time, the service life of the pipeline will be shortened, and even the risk of oil and gas leakage will occur, posing a threat to the environment and human life and property. [0003] In the prior art, methods of measuring pipeline displaceme...

AI Technical Summary

Problems solved by technology

However, due to geological disasters such as earthquakes, landslides, floods, permafrost thawing, frost heave, and third-party damage, the pipeline will be displaced, resulting in regional or local bending strain of the pipeline. In severe cases, environmental loads will cause the pipeline to fold. Affect the integrity of the pipeline. If it cannot be found and repaired in time, the service life of the pipeline will be shortened, and even the risk of oil and gas leakage will occur, posing a threat to the environment and human life and property safety.

[0003] In the prior art, methods of measuring pipeline displacement such as line-of-sight technology, acoustic emission and optical fiber methods are usually used to measure pipeline displacement. When the special sensor measures the displacement of the pipeline, it is measured through media such as water and sand, so that the accuracy of the measured data is not high, and the accuracy of the bending strain of the long-distance pipeline obtained according to the measurement data is also low.

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