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RESEARCH PAPERS

A Factorial Design Approach to Investigate the Effect of Geometry in Drill String Screw Connectors

[+] Author and Article Information
H. Bahai

T & N Technology, Rugby, U.K.

I. I. Esat

Department of Mechanical Engineering, Brunel University, Uxbridge, Middlesex, U.K. UB8 3PH

L. Rass

Department of Mathematics, Queen Mary and Westfield College, London University, U.K. E1 4NS

J. Energy Resour. Technol 117(2), 101-107 (Jun 01, 1995) (7 pages) doi:10.1115/1.2835325 History: Received March 17, 1994; Revised March 01, 1995; Online January 22, 2008

Abstract

This paper describes a parametric study of drill string threaded connector design based on a “factorial design” method. The study is facilitated by a hybrid model which has been developed, validated, and reported previously, enabling efficient calculation of load and stress distribution along threaded connectors subjected to both axial and bending modes of loading. A parametric equation is produced where stress concentration factor is defined in terms of various geometrical variables. The equation is then utilized to carry out a constrained optimization within the feasible parameter space, and hence produce an “optimum” thread and connector design.

Copyright © 1995 by The American Society of Mechanical Engineers
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