The Twist of a Helically Buckled Casing

[+] Author and Article Information
R. F. Mitchell

Exxon Production Research Co., Houston, Texas

J. Eng. Ind 97(2), 493-497 (May 01, 1975) (5 pages) doi:10.1115/1.3438610 History: Received July 01, 1974; Online July 15, 2010


When a casing buckles in three dimensions, torques, as well as bending moments, are developed. Since well casing is joined with threaded collars, it is necessary to know the magnitude of the twist of the casing to evaluate the risk of buckling failure. In this work, the strain energy for a three-dimensionally buckled column is developed and the differential equations of buckling are derived and solved for helical buckling, buckling caused by an applied moment, and combined end loading and torque.

Copyright © 1975 by ASME
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