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RESEARCH PAPERS

Experimental Investigation of Galling Resistance in OCTG Connections

[+] Author and Article Information
A. Ertas, H. J. Carper, O. Cuvalci, S. Ekwaro-Osire

Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409-1021

W. R. Blackstone

Lockheed Engineering and Sciences Company, La Cruces, NM

J. Eng. Ind 114(1), 100-104 (Feb 01, 1992) (5 pages) doi:10.1115/1.2899745 History: Received November 01, 1989; Revised March 01, 1991; Online April 08, 2008

Abstract

The results of galling experiments are strongly dependent on the method used and vary from test machine to test machine. However, by a well-developed test method and testing machine, one can obtain reliable and repeatable results. The primary objective of this research is to develop a new test method and machine for evaluating galling resistance in OCTG (oil country tubular goods) connections. Through the application of basic principles of statistical design of experiments, the galling resistance in OCTG threaded connections has been investigated. For estimating the nominal failure stress, two statistical methods, namely, up-and-down and frequency distribution, have been applied and compared. Galling resistance, one of the most important design factors of OCTG connections, has been studied and discussed.

Copyright © 1992 by The American Society of Mechanical Engineers
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