Internal Corrosion Detection Sensor for Exposed Oil Flow Lines & Storage Tanks

Student thesis: Master's Thesis

Abstract

Corrosion in the oil and gas industry represents one of the major problems that affect oil production and transportation processes, several corrosion-inspection technologies have been developed to mitigate internal and external corrosion of oil pipelines and storage tanks. This study investigates a new internal corrosion detection sensor design based on the magnetic interaction between permanent magnets and the ferromagnetic nature of steel used to manufacture oil pipelines and storage tanks. Finite element (FE) model has been designed to analyze the effect of various parameters on the magnetic attraction force developed between the magnet and the steel. The corrosion detection sensor is designed based on the electromagnetic numerical analysis results. The experimental testing of the sensor shows that it is capable of detecting internal corrosion in oil storage tanks within approximately 8 mm of the internal surface thickness. However, the detection range of the sensor decreases slightly when it is applied to oil pipelines due to the pipeline surface curvature. The sensor showed more than two-fold improvement in the detection range compared to previous sensors which were designed based on the same concept. Furthermore, the sensor is designed to provide a monitoring solution rather than occasional inspection.
Date of AwardDec 2020
Original languageAmerican English

Keywords

  • corrosion detection sensor
  • electromagnetic numerical analysis
  • internal corrosion
  • pipelines
  • FEA.

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