RESEARCH PAPERS: Drilling/Manufacturing

Investigation of API 8 Round Casing Connection Performance—Part I: Introduction and Method of Analysis

[+] Author and Article Information
W. T. Asbill

Harry J. Sweet & Associates, Inc., Houston, Tex. 77069

P. D. Pattillo

Amoco Production Company, Tulsa, Okla.

W. M. Rogers

AMF Tuboscope, Houston, Tex.

J. Energy Resour. Technol 106(1), 130-136 (Mar 01, 1984) (7 pages) doi:10.1115/1.3231008 History: Received November 15, 1982; Revised June 24, 1983; Online October 22, 2009


The purpose of this investigation was to gain a better understanding into the mechanical behavior of the API 8 Round casing connection, when subjected to service loads of assembly interference, tension and internal pressure. The connection must provide both structural and sealing functions and these functions were evaluated by several methods. Part I discusses the methods of analysis, which include hand calculations using strength of materials, finite element method via unthreaded and threaded models, and experimental analysis using strain gages. Comparisons of all three methods are made for stresses and show that the finite element method accurately models connection behavior.

Copyright © 1984 by ASME
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