Pipeline wall thickness obtaining method and system

An acquisition method and technology of pipeline wall, which is applied in the field of measurement and calculation of pipeline wall thickness, can solve the problem of unfavorable long-term monitoring and evaluation of pipeline quality and corrosion damage, does not take into account coupling, temperature and other deviation factors, and cannot accurately reflect pipeline wall Thick truth and other issues

Pending Publication Date: 2021-02-02
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The calculation of pipeline wall thickness is of great significance for evaluating pipeline quality and corrosion damage. At present, the calculation method of pipeline wall thickness mainly converts the original signal obtained by measuring the pipeline wall thickness of the thickness gauge into the original value of the thickness measurement, and then outputs and displays it. Due to coupling, temperature and other deviation factors, it is also difficult to distinguish and eliminate bad values
The calculation results of the pipe wall thickness without reference to the nominal value of the pipe wall thickness and the historical thickness measurement value are prone to fluctuate due to accidental factors, and cannot accurately reflect the real situation of the pipe wall thickness, which is very unfavorable for long-term monitoring and evaluation of pipe quality and corrosion damage

Method used

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  • Pipeline wall thickness obtaining method and system
  • Pipeline wall thickness obtaining method and system
  • Pipeline wall thickness obtaining method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0015] In an exemplary embodiment, such as figure 1 As shown, the pipeline wall thickness acquisition method includes S1 to obtain the original thickness measurement data set OrigTH, S2 to obtain the compensation correction amount ΔTH i , S3 obtains the thickness measurement candidate data set CompTH, S4 judges whether the thickness measurement candidate data set CompTH has a unique mode, and S5 the thickness measurement candidate data set CompTH has a unique mode, and there are five steps in total to obtain the first pipeline wall thickness value.

[0016] The S1 acquires the original thickness measurement data set OrigTH: use the thickness gauge in the preset a mode to perform c times of measurement at each time at the preset b times, and obtain a total of M data OrigTH i (1≤i≤m, i∈N, m∈N) form the thickness measurement raw data group OrigTH. The a, b, c, M are all non-zero natural numbers. The test mode, test time and the number of tests at each moment of the thickness ga...

Embodiment 2

[0023] In this exemplary embodiment, if figure 2 As shown, the pipeline wall thickness acquisition method includes S1 to obtain the original thickness measurement data set OrigTH, S2 to obtain the compensation correction amount ΔTH i , S3 obtains the thickness measurement candidate data set CompTH, S4 judges whether the thickness measurement candidate data set CompTH has a unique mode, S5 the thickness measurement candidate data set CompTH has a unique mode, obtains the first pipeline wall thickness value, S6 thickness measurement candidate data set CompTH has no unique mode: S61 obtains the pipe wall thickness reference value Ref; S62 obtains the thickness measurement difference data set DabsTH; S63 obtains the minimum deviation value DabsTH min ; S64 judging the minimum deviation value DabsTH min Whether it is less than or equal to the deviation threshold Dev thr , S7 DabsTH min If it is less than or equal to the Devthr, obtain the second pipe wall thickness value, a tot...

Embodiment 3

[0039] In this exemplary embodiment, if image 3 As shown, the pipeline wall thickness acquisition method includes S1 to obtain the original thickness measurement data set OrigTH, S2 to obtain the compensation correction amount ΔTH i , S3 obtains the thickness measurement candidate data set CompTH, S4 judges whether the thickness measurement candidate data set CompTH has a unique mode, S5 the thickness measurement candidate data set CompTH has a unique mode, obtains the first pipeline wall thickness value, S6 thickness measurement candidate data set CompTH has no unique mode: S61 obtains the pipe wall thickness reference value Ref; S62 obtains the thickness measurement difference data set DabsTH; S63 obtains the minimum deviation value DabsTH min ; S64 judging the minimum deviation value DabsTH min Whether it is less than or equal to the deviation threshold Dev thr , S7 DabsTH min Less than or equal to the Devthr, get the second pipe wall thickness value, S8 DabsTH min If ...

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Abstract

The invention provides a pipeline wall thickness acquisition method and system, and relates to the field of measurement and calculation of pipeline wall thickness, and the method comprises the steps:S1, obtaining a thickness measurement original data set, S2, obtaining a compensation correction value, S3, obtaining a thickness measurement candidate data set, S4, judging whether the thickness measurement candidate data set has a unique mode or not, and S5, judging whether the thickness measurement candidate data set has a unique mode or not and obtaining the wall thickness value of the targetpipeline. The pipeline wall thickness acquisition system comprises a thickness gauge, a cloud processor and a pipeline wall thickness acquisition device. The cloud processor comprises a thickness measurement setting unit, a compensation correction value calculation unit, a result output unit and a data storage unit. The method has the beneficial effects that errors caused by factors such as coupling and temperature deviation can be eliminated, the obtained wall thickness value of the target pipeline is close to the real wall thickness of the pipeline, and the change trend and the corrosion condition of the wall thickness of the pipeline can be evaluated.

Description

technical field [0001] The invention relates to the field of measurement and calculation of pipeline wall thickness, in particular to a pipeline wall thickness acquisition method used in online monitoring. Background technique [0002] The calculation of pipeline wall thickness is of great significance for evaluating pipeline quality and corrosion damage. At present, the calculation method of pipeline wall thickness mainly converts the original signal obtained by measuring the pipeline wall thickness of the thickness gauge into the original value of the thickness measurement, and then outputs and displays it. Due to deviation factors such as coupling and temperature, it is also difficult to distinguish and eliminate bad values. The calculation results of the pipeline wall thickness without reference to the nominal value of the pipeline wall thickness and the historical thickness measurement value are prone to fluctuate due to accidental factors, and cannot accurately reflect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G01B17/02G06F113/14G06F119/04
CPCG01B17/02G06F30/20G06F2113/14G06F2119/04
Inventor 骆吉庆何莎伍剑波张志东许钊源陈文斌王仕强吴文强王小梅徐伟津
Owner BC P INC CHINA NAT PETROLEUM CORP
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