OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls

Saad M. El-Raghy; Abdel-Alim H. El-Sayed; Nabil A. Tayeb

doi:doi:10.11648/j.ogce.20140203.11

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OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls

Saad M. El-Raghy, Abdel-Alim H. El-Sayed, Nabil A. Tayeb

Published in International Journal of Oil, Gas and Coal Engineering (Volume 2, Issue 3)

Received: 27 May 2014 Accepted: 9 June 2014 Published: 20 June 2014

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Abstract

Previous studies on oil well’s unpredicted failures referred to uncertainty in interpreting the phenomenon of the prone of the external walls of Oil Country Tubular Good OCTG to the corrosion attacks more than the interior walls. In this study the tubular goods standards, failure analyses procedures and manufacturing tubular processes are reassessed. Theoretically manufacturing processes must show differential metallurgical heredities and residual stresses on OCTG exterior and interior walls. This fact regarded as an insignificant issue on most corrosion failure analyses, whereas any cut of the base metal from anywhere of a pipe, supposed to represents overall pipes in services condition. In this study, Full Ring Corrosion Cell Kit (FRCCK) setup has been built and full ring specimens prepared from L-80 grade tubing. Open circuit and galvanic corrosion tests have been run on exterior and interior walls separately in multi-concentration brines. Metallography shows slight difference of the microstructure and the ferrite/perlite phase’s ratio between inner and outer surfaces, but electrochemically the results indicate that there are significant differences of corrosion behaviors between exterior and interior surfaces. This approach may lead to reassessment of tubular goods corrosion manufacturing processes, inspections, failure interpreting, designing, specifications and quality standards, by cheap, fast, and reliable electrochemical non-destructive testing (NDT).

Published in	International Journal of Oil, Gas and Coal Engineering (Volume 2, Issue 3)
DOI	10.11648/j.ogce.20140203.11
Page(s)	28-35
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Corrosion, Failure, OCTG, NDT, Casing, Tubing

References

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[2]	Mohamed Watfa,: "Downhole Casing Corrosion Monitoring and Interpretation Techniques to Evaluate Corrosion in Multiple Casing Strings", SPE paper 17951 ,SPE Production Engineering Aug.1991.
[3]	W.P.Schneider, "Casin and Tubing Connection Stress, " JPT (Aug. 1982) ,P 1851- 62 { From SPE paper 20902.
[4]	Collin Wall.:“Casing Design and Practices”, Cary International Traning Services Ltd, The Enterprise Center, North Mall, Corck,1990 Irel-and
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[6]	K. D. Chelette, P. W. Moore, and Xin Long, Management of Residual Stress: the Offshore Technology Conference Brasil held in Rio de Janeiro, Brazil, 4–6 October 2011An Emerging Technology for Oil Indus-try
[7]	E. Brinksmeier, J.T. Cammett, W. Konig, P. Leskovar, J. Peters, H.K. Tonshoff: Residual Stresses - Measurement and Causes in Machining Processes.In Annals of the 31st CIRP Confe-rence on Manufacturing Technology 2/491-510, 1982.
[8]	Andrei Dumitrescu, Ph. D. Eng., Dragoş Gabriel Zisopol, Ph. D. Eng: ANALYSIS OF THE RESIDUAL STRESS LEVEL IN CASING AND ITS INFLUENCE ON THE COLLAPSE STRENGTH. “Petroleum-Gas” University of Ploieşti, Roma-nia
[9]	Bruce E. Brian V. Garrison.;THE EFFECTS OF OCTG CONNECTION SWAGING AND STRESSRELIEVING ON SSC RESISTANCE, corrosion conference paper 0311. 2003
[10]	P. Staron , N. Schell1 S. Raatz K. Theis-Bröh, Residual stresses in roller-straightened seamless steel pipes,DESY Photon Science Annual Report 2011 (2012) , Germany
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[12]	R. K. Zhu(1), B. T. Lu, J. L. Luoand Y. C. Lu,; EFFECTS OF COLD WORK ON CORROSION SUSCEPTIBILITY OF STEAM GENERATOR TUBING, Paper No. 10229,NACE, Corroion conference &Expo,2010.
[13]	VivekanandKain and Swati Ghosh ;EFFECT OF RESIDUAL STRESS AND STRAIN GENERATED DURING MANUFACTURING PROCESS ON THE STRESS CORROSION CRACKING SUSCEPTIBILITY OF AUSTENITIC STAINLESS STEEL , paper 10304 ,corrosion 2010
[14]	Lind gas ;Neutral Hardening and Annealing ,Furnace Atmospheres No. 2,www.linde-gas.com
[15]	DimitriKozinakov, TA. FilipZdraveski, MalushMjaku; Investigation of residual stresses in high frequency longitudinal welded pipes, Advanced Research in Scientific Areas 2012 December, 3. - 7. 2012
[16]	QingrenXiong, Daoxin Liu, Yanhua Li, Weiwei Zhang, Hongyuan Chen and Yang Li; Effect of Residual Tensile Stress on Stress Corrosion Behavior of the Base Metal of X80 UOE Pipe, Proceedings of the Twenty-third (2013) International Offshore and Polar EngineeringAnchorage, Alaska, USA, June 30–July 5, 2013
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APA Style

Saad M. El-Raghy, Abdel-Alim H. El-Sayed, Nabil A. Tayeb. (2014). OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls. International Journal of Oil, Gas and Coal Engineering, 2(3), 28-35. https://doi.org/10.11648/j.ogce.20140203.11

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ACS Style

Saad M. El-Raghy; Abdel-Alim H. El-Sayed; Nabil A. Tayeb. OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls. Int. J. Oil Gas Coal Eng. 2014, 2(3), 28-35. doi: 10.11648/j.ogce.20140203.11

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AMA Style

Saad M. El-Raghy, Abdel-Alim H. El-Sayed, Nabil A. Tayeb. OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls. Int J Oil Gas Coal Eng. 2014;2(3):28-35. doi: 10.11648/j.ogce.20140203.11

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@article{10.11648/j.ogce.20140203.11,
  author = {Saad M. El-Raghy and Abdel-Alim H. El-Sayed and Nabil A. Tayeb},
  title = {OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls},
  journal = {International Journal of Oil, Gas and Coal Engineering},
  volume = {2},
  number = {3},
  pages = {28-35},
  doi = {10.11648/j.ogce.20140203.11},
  url = {https://doi.org/10.11648/j.ogce.20140203.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20140203.11},
  abstract = {Previous studies on oil well’s unpredicted failures referred to uncertainty in interpreting the phenomenon of the prone of the external walls of Oil Country Tubular Good OCTG to the corrosion attacks more than the interior walls. In this study the tubular goods standards, failure analyses procedures and manufacturing tubular processes are reassessed. Theoretically manufacturing processes must show differential metallurgical heredities and residual stresses on OCTG exterior and interior walls. This fact regarded as an insignificant issue on most corrosion failure analyses, whereas any cut of the base metal from anywhere of a pipe, supposed to represents overall pipes in services condition. In this study, Full Ring Corrosion Cell Kit (FRCCK) setup has been built and full ring specimens prepared from L-80 grade tubing. Open circuit and galvanic corrosion tests have been run on exterior and interior walls separately in multi-concentration brines. Metallography shows slight difference of the microstructure and the ferrite/perlite phase’s ratio between inner and outer surfaces, but electrochemically the results indicate that there are significant differences of corrosion behaviors between exterior and interior surfaces. This approach may lead to reassessment of tubular goods corrosion manufacturing processes, inspections, failure interpreting, designing, specifications and quality standards, by cheap, fast, and reliable electrochemical non-destructive testing (NDT).},
 year = {2014}
}

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TY - JOUR
T1 - OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls
AU - Saad M. El-Raghy
AU - Abdel-Alim H. El-Sayed
AU - Nabil A. Tayeb
Y1 - 2014/06/20
PY - 2014
N1 - https://doi.org/10.11648/j.ogce.20140203.11
DO - 10.11648/j.ogce.20140203.11
T2 - International Journal of Oil, Gas and Coal Engineering
JF - International Journal of Oil, Gas and Coal Engineering
JO - International Journal of Oil, Gas and Coal Engineering
SP - 28
EP - 35
PB - Science Publishing Group
SN - 2376-7677
UR - https://doi.org/10.11648/j.ogce.20140203.11
AB - Previous studies on oil well’s unpredicted failures referred to uncertainty in interpreting the phenomenon of the prone of the external walls of Oil Country Tubular Good OCTG to the corrosion attacks more than the interior walls. In this study the tubular goods standards, failure analyses procedures and manufacturing tubular processes are reassessed. Theoretically manufacturing processes must show differential metallurgical heredities and residual stresses on OCTG exterior and interior walls. This fact regarded as an insignificant issue on most corrosion failure analyses, whereas any cut of the base metal from anywhere of a pipe, supposed to represents overall pipes in services condition. In this study, Full Ring Corrosion Cell Kit (FRCCK) setup has been built and full ring specimens prepared from L-80 grade tubing. Open circuit and galvanic corrosion tests have been run on exterior and interior walls separately in multi-concentration brines. Metallography shows slight difference of the microstructure and the ferrite/perlite phase’s ratio between inner and outer surfaces, but electrochemically the results indicate that there are significant differences of corrosion behaviors between exterior and interior surfaces. This approach may lead to reassessment of tubular goods corrosion manufacturing processes, inspections, failure interpreting, designing, specifications and quality standards, by cheap, fast, and reliable electrochemical non-destructive testing (NDT).
VL - 2
IS - 3
ER -

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Author Information

Saad M. El-Raghy

Mining, Petroleum and Metallurgical Engineering, Cairo University, Egypt
Abdel-Alim H. El-Sayed

Mining, Petroleum and Metallurgical Engineering, Cairo University, Egypt
Nabil A. Tayeb

Petroleum Engineering, Koya University, Kurdistan, Iraq

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APA Style

Saad M. El-Raghy, Abdel-Alim H. El-Sayed, Nabil A. Tayeb. (2014). OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls. International Journal of Oil, Gas and Coal Engineering, 2(3), 28-35. https://doi.org/10.11648/j.ogce.20140203.11

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ACS Style

Saad M. El-Raghy; Abdel-Alim H. El-Sayed; Nabil A. Tayeb. OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls. Int. J. Oil Gas Coal Eng. 2014, 2(3), 28-35. doi: 10.11648/j.ogce.20140203.11

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AMA Style

Saad M. El-Raghy, Abdel-Alim H. El-Sayed, Nabil A. Tayeb. OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls. Int J Oil Gas Coal Eng. 2014;2(3):28-35. doi: 10.11648/j.ogce.20140203.11

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@article{10.11648/j.ogce.20140203.11,
  author = {Saad M. El-Raghy and Abdel-Alim H. El-Sayed and Nabil A. Tayeb},
  title = {OCTG Premature failures Due to Metallurgical Variance and Differential Electrochemical Behaviour of Exterior and Interior Walls},
  journal = {International Journal of Oil, Gas and Coal Engineering},
  volume = {2},
  number = {3},
  pages = {28-35},
  doi = {10.11648/j.ogce.20140203.11},
  url = {https://doi.org/10.11648/j.ogce.20140203.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20140203.11},
  abstract = {Previous studies on oil well’s unpredicted failures referred to uncertainty in interpreting the phenomenon of the prone of the external walls of Oil Country Tubular Good OCTG to the corrosion attacks more than the interior walls. In this study the tubular goods standards, failure analyses procedures and manufacturing tubular processes are reassessed. Theoretically manufacturing processes must show differential metallurgical heredities and residual stresses on OCTG exterior and interior walls. This fact regarded as an insignificant issue on most corrosion failure analyses, whereas any cut of the base metal from anywhere of a pipe, supposed to represents overall pipes in services condition. In this study, Full Ring Corrosion Cell Kit (FRCCK) setup has been built and full ring specimens prepared from L-80 grade tubing. Open circuit and galvanic corrosion tests have been run on exterior and interior walls separately in multi-concentration brines. Metallography shows slight difference of the microstructure and the ferrite/perlite phase’s ratio between inner and outer surfaces, but electrochemically the results indicate that there are significant differences of corrosion behaviors between exterior and interior surfaces. This approach may lead to reassessment of tubular goods corrosion manufacturing processes, inspections, failure interpreting, designing, specifications and quality standards, by cheap, fast, and reliable electrochemical non-destructive testing (NDT).},
 year = {2014}
}

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