RESEARCH PAPERS: Drilling/Manufacturing

Investigation of API 8 Round Casing Connection Performance—Part II: Stresses and Criteria

[+] 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), 137-143 (Mar 01, 1984) (7 pages) doi:10.1115/1.3231009 History: Received November 15, 1982; Revised June 24, 1983; Online October 22, 2009


Comparison of stresses in Part I showed that the APILT&C 8 Round threaded casing connection could be accurately analyzed with finite element methods, with models that both included and excluded the threads. Part II further investigates the effects of thread tapers and external loads on connection stresses. It also assumes a criteria for determining maximum assembly interference using the finite element models. Tension loading is shown to affect pin hoop stresses, while being insignificant to coupling hoop stresses. Hand-calculated stresses are shown to give reasonable hoop stress values.

Copyright © 1984 by ASME
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