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International Applied Mechanics

, Volume 42, Issue 6, pp 692–698 | Cite as

Stability of the equilibrium of rotating drillstrings

  • V. I. Gulyaev
  • P. Z. Lugovoi
  • M. A. Belova
  • I. L. Solov’ev
Article

Abstract

The quasistatic stability of a rotating drillstring under longitudinal force and torque is analyzed. Constitutive equations are derived, and a technique to solve them is proposed. It is shown that the buckling mode of the drillstring is helical within a section subjected to compressive forces

Keywords

drillstring rotation longitudinal force torque constitutive equations helical shape compressed section of drillstring 

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • V. I. Gulyaev
    • 1
  • P. Z. Lugovoi
    • 2
  • M. A. Belova
    • 1
  • I. L. Solov’ev
    • 1
  1. 1.National University of TransportKievUkraine
  2. 2.S. P. Timoshenko Institute of MechanicsNational Academy of Sciences of UkraineKiev

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