JPT
Go
spacer

 

Vol. 58 No. 5

May 2006

Wellbore Tubulars

Cyclic Mechanical and Fatigue Properties of OCTG Materials

Much of the design for well structures subjected to high-amplitude cyclic loading is based on material assumptions that extrapolate strength properties from uniaxial, monotonic tests to conditions where cyclic, multiaxial stresses are imposed. The full-length paper presents results from cyclic testing on common oil-country tubular goods (OCTG) materials and shows the difference between physical behavior measured under cyclic-loading conditions and theoretical behavior extrapolated by numerical modeling. Modeling theories for plastic deformation are discussed, including their limitations and relevance in a cyclic-loading environment.

Synopsis of SPE 97775

This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper SPE 97775, "Cyclic Mechanical and Fatigue Properties for OCTG Materials," by T.M.V. Kaiser, SPE, and V.Y.B. Yung, SPE, Noetic Engineering Inc., and R.M. Bacon, Imperial Oil Resources, prepared for the 2005 SPE International Thermal Operations and Heavy Oil Symposium, Calgary, 1-3 November.

What do you want to do?

Purchase the full technical paper from the eLibrary