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Journal of Failure Analysis and Prevention

, Volume 18, Issue 5, pp 1269–1277 | Cite as

Failure Analysis of Well-Logging Steel Wire in a Gas Injection Well

  • Yan Long
  • Mifeng Zhao
  • Junfeng Xie
  • Anqing Fu
  • Zhenquan Bai
Technical Article---Peer-Reviewed
  • 39 Downloads

Abstract

The fracturing of well-logging steel wire occurred during downhole operation in a gas injection well in China. The failed well-logging steel wire material was austenitic stainless steel manufactured by cold drawing. In this study, the failure cause was investigated based on visual inspection, chemical composition analysis, metallographic observation, mechanical performance testing, SEM and EDS analysis. The results showed that the failure reason was primarily Cl-induced stress corrosion cracking which made the steel wire unable to bear the normal load of well-logging operation. The steel wire had experienced SCC during previous operation in a production well where downhole mediums contained high Cl concentration, and then cracks-containing steel wire was used for this operation. Most of the cracks initiated within surface scratches caused by cold drawing where corrosion pits were present. In addition, cold drawing process of steel wire had a significant influence on SCC propagation mode, and the secondary cracks mainly extend along deformed austenitic grain boundaries in cold drawing direction.

Keywords

Well-logging steel wire Austenitic stainless steel Stress corrosion cracking Cold drawing 

Notes

Acknowledgments

The work was supported by the National Science and Technology Key Project (2016ZX05051003-007), the Key Research and Development Plan of Shaanxi Province (2017KJXX-03) and the TGRI Institute Level Project (TGRI-2017-06).

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Copyright information

© ASM International 2018

Authors and Affiliations

  • Yan Long
    • 1
    • 2
  • Mifeng Zhao
    • 3
  • Junfeng Xie
    • 3
  • Anqing Fu
    • 1
    • 2
  • Zhenquan Bai
    • 1
    • 2
  1. 1.Tubular Goods Research InstituteChina National Petroleum CorporationXi’anChina
  2. 2.State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment MaterialsXi’anChina
  3. 3.Tarim Oilfield CompanyPetroChina Company LimitedKorlaChina

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