Research Article
Mathematical Modeling and Analysis of Drill String Longitudinal Vibration with Lateral Inertia Effect
Table 3
Calculated parameters of the inside and outside radius influence.
| Name of parameters | Results |
| Poisson’s ratio of the drill string | 0.30 | Length of the drill string H (m) | 2000 | Outside radii of the drill string , (m) | 0.10 | Outside radii of the drill string , (m) | 0.11 | Inside radii of the drill string , (m) | 0.08 | Inside radii of the drill string , (m) | 0.09 | Damping coefficient (Ns/m) | 10000 |
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