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) |
|---|---|
| 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