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Application of Numerical Modeling for Predicting the Fatigue Crack Growth of an Elliptical Crack in Kelly Valves

[+] Author Affiliations
Hamidreza Ahmadimoghaddamseighalani

Hi-Kalibre Equipment Ltd., Edmonton, AB, Canada

Pierre Mertiny

University of Alberta, Edmonton, AB, Canada

Paper No. PVP2016-63306, pp. V003T03A052; 6 pages
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5039-8
  • Copyright © 2016 by ASME


Kelly valves, also known as full opening safety valves, are widely used in the oil and gas industry for the purpose of blowout prevention. Crack propagation in the stem hole feature of Kelly valves is of concern during service in drilling operations as fatigue may lead to catastrophic failure. A computational tool to predict the fatigue life of these valves when a crack is present was therefore created. The present paper describes the numerical modeling approach in which an elliptical crack in the stem hole feature was introduced. To predict the fatigue life of the valve based on the J-integral method, ANSYS Workbench was used for a FEA analysis in conjunction with Microsoft EXCEL and Iron Python programming.

Copyright © 2016 by ASME



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