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Investigation of Stress Concentration and Casing Strength Degradation Caused by Corrosion Pits
Joint Authors
Yan, Wei
Xu, Yun
Zhou, Yi
Wang, Kongyang
Source
International Journal of Corrosion
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-11-09
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Downhole casing and tubing are subjected to corrosion in many cases because of the exposure to corrosive environment.
A more serious problem is that pitting corrosion occurs in the casing inner surface.
Meanwhile, downhole strings are subjected to various forms of mechanical loads, for example, internal pressure load, external collapse load, or both.
These loads acting on the corrosion pits will cause stress concentration and degrade the casing strength.
Thus, it is essential to evaluate the stress concentration degree reasonably.
The SCF (stress concentration factor) is usually used to characterize the degree of stress concentration induced by corrosion pits.
This paper presented a comparison on the SCFs regarding the analytical method for a single pit and experimental method for double pits.
The results show that the SCF of a single pit depends mainly on the depth of the corrosion pit; however, the SCF of the double pits strongly depends on the pits distance.
A correction factor of 1.3 was recommended in the double pits SCF prediction model.
American Psychological Association (APA)
Yan, Wei& Xu, Yun& Zhou, Yi& Wang, Kongyang. 2016. Investigation of Stress Concentration and Casing Strength Degradation Caused by Corrosion Pits. International Journal of Corrosion،Vol. 2016, no. 2016, pp.1-6.
https://search.emarefa.net/detail/BIM-1105496
Modern Language Association (MLA)
Yan, Wei…[et al.]. Investigation of Stress Concentration and Casing Strength Degradation Caused by Corrosion Pits. International Journal of Corrosion No. 2016 (2016), pp.1-6.
https://search.emarefa.net/detail/BIM-1105496
American Medical Association (AMA)
Yan, Wei& Xu, Yun& Zhou, Yi& Wang, Kongyang. Investigation of Stress Concentration and Casing Strength Degradation Caused by Corrosion Pits. International Journal of Corrosion. 2016. Vol. 2016, no. 2016, pp.1-6.
https://search.emarefa.net/detail/BIM-1105496
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1105496