RESEARCH PAPERS: Rock Mechanics/Drilling Mechanics

Collapse of Oil Well Casing With Ovality

[+] Author and Article Information
P. D. Pattillo

Amoco Production Company, Tulsa, Okla. 74102

N. C. Huang

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Ind. 46556

J. Energy Resour. Technol 107(1), 128-134 (Mar 01, 1985) (7 pages) doi:10.1115/1.3231150 History: Received November 10, 1983; Revised October 30, 1984; Online October 22, 2009


The nonlinear response and eventual collapse of an initially imperfect cross section of a cylinder of infinite length is analyzed. The cylinder is loaded by external pressure and axial load and is intended to model oil well casing in a service environment. Results from the analysis agree well with experimental data and provide an interesting alternative to current empirical/statistical methods for determining the minimum collapse resistance of casing for use in design calculations.

Copyright © 1985 by ASME
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