Abstract
This Note studies the self-excited stick-slip oscillations of a rotary drilling system with a drag bit, using a discrete model which takes into consideration the axial and torsional vibration modes of the bit. Coupling between these two vibration modes takes place through a bit-rock interaction law which accounts for both frictional contact and cutting processes at the bit-rock interface. The cutting process introduces a delay in the equations of motion which is ultimately responsible for the existence of self-excited vibrations, exhibiting stick-slip oscillations under certain conditions.
Original language | English (US) |
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Pages (from-to) | 619-626 |
Number of pages | 8 |
Journal | Comptes Rendus - Mecanique |
Volume | 332 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2004 |
Bibliographical note
Funding Information:The authors would like to thank Martyn Fear, Robert Delwiche, and Oliver Matthews for the benefit of many useful discussions. The research was supported by grants from BP-Amoco, Security-DBS, the University of Minnesota, and Diamant Drilling Services.
Keywords
- Delai
- Delay
- Drillstring vibrations
- Dynamical systems
- Self-excited vibrations
- Stick-slip
- Stick-slip (adhérence-glissement)
- Systèmes dynamiques
- Vibrations
- Vibrations auto-entretenues
- Vibrations du train de tiges de forage