Mathematical Modeling and Analysis of Drill String Longitudinal Vibration with Lateral Inertia Effect

Table 2

Calculation parameters of the length of drill string influence.

Name of parameters	Results
Poisson’s ratio of the drill string	0.30
Length of the drill string , (m)	1800
Length of the drill string , (m)	2000
Outside radius of the drill string (m)	0.10
Inside radius of the drill string (m)	0.08
Damping coefficient (Ns/m)	10000