Collapse of Oil Well Casing

[+] Author and Article Information
N. C. Huang

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Ind. 96556

P. D. Pattillo

Amoco Production Company, Tulsa, Okla. 74102

J. Pressure Vessel Technol 104(1), 36-41 (Feb 01, 1982) (6 pages) doi:10.1115/1.3264183 History: Received April 01, 1980; Revised September 30, 1981; Online November 05, 2009


This paper is concerned with the theoretical study of the collapse of oil well casing under various loading conditions. The analysis is based on a model of a cylindrical shell of infinite length subjected to an axial tension and an external pressure. It is found that when the thickness-radius ratio of the casing is sufficiently small, collapse of the casing may take place in a form of plastic buckling. Critical conditions for plastic buckling are derived based on the J2 -incremental theory and the J2 -deformation theory. Another type of collapse is caused by the realization of the ultimate strength of the material. Critical conditions in the second case of collapse are calculated based on a plane strain formulation associated with the J2 -incremental theory. The theoretical results obtained in this paper correspond well with empirical formulas developed earlier by the API for the design of oil well casing.

Copyright © 1982 by ASME
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