Research Article
Modeling Friction Performance of Drill String Torsional Oscillation Using Dynamic Friction Model
Table 1
Simulation parameters [
12,
26–
28].
| | Number | Parameter/unit | Value |
| | 1 | Coulomb friction coefficient | 0.21 | | 2 | Static friction coefficient | 0.25 | | 3 | Friction Stiffness coefficient/(N/mm) | 50 | | 4 | Friction Damping coefficient/(N/(mm/s)) | 0.316 | | 5 | Stribeck velocity/(μm/s) | 190 | | 6 | Length of drill pipe/m | 10 | | 7 | Outer diameter of drill pipe/m | 0.127 | | 8 | Inner diameter of drill pipe/m | 0.1086 | | 9 | Wellbore diameter/m | 0.2156 | | 10 | Dynamic shear/Pa | 15 | | 11 | Viscosity/Pa⋅s | 0.03 | | 12 | Density of drill pipe/(kg/m3) | 7850 | | 13 | Density of drill mud/(kg/m3) | 2200 | | 14 | Volume rate/(L/s) | 30 |
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