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<p>In this study, various experiments were conducted to analyze the corrosion perforation failure of a 13Cr tubing used in a gas well. The experiments included data verification, macroscopic morphology analysis, mechanical properties, microstructure analysis of corroded areas, energy spectrum analysis, and also XRD phase analysis. The results indicated that: 1) The chemical composition and Rockwell hardness test results of the failed 13Cr tubing body meet the requirements of API Spec 5CT-2023. 2) Four potential reasons for the corrosion perforation of the failed 13Cr tubing were analyzed and discussed: ①injecting acidic liquid into the well, ②galvanic corrosion, ③the action of corrosive media (CO<sub>2</sub>, H<sub>2</sub>S, O<sub>2</sub>, Cl<sup>-</sup>, etc.), and ④anodic dissolution caused by weak leakage of cables on the pump. It was inferred that the corrosion perforation of the 13Cr tubing from the outer surface to the inner surface of pipe body mainly caused by anodic dissolution under microleakage of underground cables, and the secondary reasons under-deposit corrosion and oxygen corrosion.</p>

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Corrosion Perforation Failure Analysis of 13Cr Tubing in a Gas Well

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Jinlan Zhao,
  • Feng Cao,
  • Min Zhang,
  • Dejun Li,
  • Yan Long,
  • Wei Shi,
  • Li Wang,
  • Shixia Cheng

摘要

In this study, various experiments were conducted to analyze the corrosion perforation failure of a 13Cr tubing used in a gas well. The experiments included data verification, macroscopic morphology analysis, mechanical properties, microstructure analysis of corroded areas, energy spectrum analysis, and also XRD phase analysis. The results indicated that: 1) The chemical composition and Rockwell hardness test results of the failed 13Cr tubing body meet the requirements of API Spec 5CT-2023. 2) Four potential reasons for the corrosion perforation of the failed 13Cr tubing were analyzed and discussed: ①injecting acidic liquid into the well, ②galvanic corrosion, ③the action of corrosive media (CO2, H2S, O2, Cl-, etc.), and ④anodic dissolution caused by weak leakage of cables on the pump. It was inferred that the corrosion perforation of the 13Cr tubing from the outer surface to the inner surface of pipe body mainly caused by anodic dissolution under microleakage of underground cables, and the secondary reasons under-deposit corrosion and oxygen corrosion.