Finite Element Simulation of Jump-Out Behavior of Threaded Pipe Joints Used in Oil-Producing Wells

[+] Author and Article Information
Y. Morita, H. Kawashima, K. Ishihara

Technical Research Laboratories, Sumitomo Metal Industries, Ltd., Amagasaki, Japan

J. Energy Resour. Technol 110(1), 27-33 (Mar 01, 1988) (7 pages) doi:10.1115/1.3231357 History: Received December 15, 1986; Revised November 30, 1987; Online October 22, 2009


High tensile strength is one of the most important requirements for threaded pipe joints used in oil or gas-producing wells. If an excessively large tensile load is applied to the joints, a jump-out phenomenon of the pipe from the coupling occurs. The jump-out phenomenon depends largely on the thread profile, the nonlinear material properties and the contact condition at threads. In this paper, as a fundamental study, the jump-out behavior of a one-ring thread model was experimentally investigated and the FEM simulation was conducted considering the material nonlinearity and the contact condition at threads. Here, the penalty function method was applied as a technique of introducing contact condition into a large deformation elasto-plastic FEM code CAPS, which has been developed by the authors. A jump-out test of actual 473.1-mm-(18-5/8-in-) dia joint was carried out, and based on the experimental results, one criterion was proposed for the slide out of helicoidal thread in FEM simulation. As a result, the present FEM simulation method can be applied to the analysis of the jump-out phenomenon of the threaded joint.

Copyright © 1988 by ASME
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