(Aarsnes and Shor, 2018) Transient Torsional Drillstring Model
Transient Torsional Drillstring Model, as published in :
Aarsnes, Ulf Jakob F., and Roman J. Shor. "Torsional vibrations with bit off bottom: Modeling, characterization and field data validation." Journal of Petroleum Science and Engineering 163 (2018): 712-721.
The supplied model is written for Matlab (versions 2016 – 2021). To run the code, run MAIN.m.
- Only torsional dynamics are considered
- The drillbit is off bottom
- There is continuous contact between the drillstring the borehole (soft string model assumption)
- Validation results are available in the referenced journal paper