Failure Analysis of Well-Logging Steel Wire in a Gas Injection Well
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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.
KeywordsWell-logging steel wire Austenitic stainless steel Stress corrosion cracking Cold drawing
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).
- 1.B. Zhang, J. Yang, B.B. Yang, Analysis the fracture reason of well logging wire. Foundry Technol. 32(5), 701–703 (2011). (in Chinese) Google Scholar
- 2.R. Wan, Oil and Gas Well Corrosion and Corrosion Prevention, Advanced Well Completion Engineering, 3rd edn. (Elsevier, New York, 2011), pp. 617–700Google Scholar
- 3.T. Yin, W.Q. Yin, Trial-production and evaluation of stainless well-logging steelwire. Met. Prod. 36(6), 77–81 (2010). (in Chinese) Google Scholar
- 7.D.T. Spencer, M.R. Edwards, M.R. Wenman, C. Tsitsios, G.G. Scatigno, P.R. Chard-Tuckey, The initiation and propagation of chloride-induced transgranular stress-corrosion cracking (TGSCC) of 304L austenitic stainless steel under atmospheric conditions. Corros. Sci. 88(16), 76–88 (2014)CrossRefGoogle Scholar
- 9.R. Oltra, J.C. Colson, A. Desestret, The electrochemical effect of Cr, Ni, and Mo additions on the stress corrosion cracking of austenitic stainless steels in a chloride solution. Correspondence 42(1), 44–50 (1986)Google Scholar
- 10.X.Q. Xu, Production and use selecting of stainless well measuring steel wire (to be continued). Steel Wire Prod. 33(3), 3–5 (2007). (in Chinese) Google Scholar
- 13.Y. Long, X.R. Kuang, W.H. Liu, H. Ding, K. Lin, Fracture reason analysis of well-logging stainless steel wire in a western oilfield. Heat Treat. Met. 41(8), 192–196 (2016). (in Chinese) Google Scholar
- 15.Stainless and Heat-resisting Steels-Designation and Chemical Composition, GB/T 20878-2007, Standardization Administration of the People’s Republic of ChinaGoogle Scholar
- 16.X.Q. Xu, Production and use selecting of stainless well measuring steel wire (the end). Steel Wire Prod. 33(4), 5–8 (2007). (in Chinese) Google Scholar
- 24.S. Choudhary, Chloride stress corrosion cracking (Cl-SCC) of stainless steel piping and equipment in condensate stabilization unit, Abu Dhabi International Petroleum Exhibition and Conference, SPE-177617-MS, Abu Dhabi, UAE, Nov. 9–12, 2015Google Scholar