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International Applied Mechanics

, Volume 49, Issue 3, pp 350–359 | Cite as

Self-excited vibrations of a drillstring bit

  • V. I. GulyaevEmail author
  • P. Z. Lugovoi
  • E. I. Borshch
Article

The whirling vibrations of a rotating drillstring bottom-hole assembly subject to the moment of friction are analyzed qualitatively. A problem statement and solution are given. The self-excitation of vibrations is simulated. It is established that during the self-excitation of whirling vibrations, the axial line of the drill bit can slowly and rapidly move over intricately shaped nonsmooth conical surfaces

Keywords

drillstring rotating drill bit frictional force nonconservative moment whirling vibration 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • V. I. Gulyaev
    • 1
    Email author
  • P. Z. Lugovoi
    • 2
  • E. I. Borshch
    • 1
  1. 1.National University of TransportKyivUkraine
  2. 2.S. P. Timoshenko Institute of MechanicsNational Academy of Sciences of UkraineKyivUkraine

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