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TECHNICAL BRIEFS

Burst Strength Analysis of Casing With Geometrical Imperfections

[+] Author and Article Information
Xiaoguang Huang1

 Advantica Technologies Ltd., Ashby Road, Loughborough, LE11 3GR, UKxghuang98@gmail.com

Yanyun Chen

 Power Technology Centre, EON UK, Ratcliffe on Soar, Nottingham, NG11 0EE, UK

Kai Lin

 Turbular Goods Research Centre, CNPC, Dian Zi Er Road, Xi’An, 710000, P.R.C.

Musa Mihsein

 University of Derby, Kedleston Road, Derby, DE22 1GB, UK

Kevin Kibble, Richard Hall

School of Engineering and Built Environment, University of Wolverhampton, Wolverhampton WV1 1SB, UK

1

Corresponding author.

J. Pressure Vessel Technol 129(4), 763-770 (Oct 20, 2006) (8 pages) doi:10.1115/1.2767370 History: Received June 03, 2004; Revised October 20, 2006

Accurately predicting the burst strength is very important in the casing design for the oil and gas industry. In this paper, finite element analysis is performed for an infinitely long thick walled casing with geometrical imperfections subjected to internal pressure. A comparison with a series of full-scale experiments was conducted to verify the accuracy and reliability of the finite element analysis. Furthermore, three predictive equations were evaluated using the test data, and the Klever equation was concluded to give the most accurate prediction of burst strength. The finite element analysis was then extended to study the effects of major factors on the casing burst strength. Results showed that the initial eccentricity and material hardening parameter had important effects on the burst strength, while the effect of the initial ovality was small.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Modeling of geometric imperfections

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Figure 2

FE model with geometry imperfections

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Figure 3

Typical plot of casing burst strength

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Figure 4

Comparison between casing burst experiments and FEM

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Figure 5

Comparisons between the predicted burst strength and experimental burst strength

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Figure 6

Effect of ovality on the burst strength

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Figure 7

Effect of eccentricity on the burst strength

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Figure 8

Effect of material hardening on the burst strength

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