Stick-Slip Analysis of a Drill String Subjected to Deterministic Excitation and Stochastic Excitation

Table 1

Drill string parameters.

Parameters	Drill pipe	Drill collar
Length	1,000 m	m
Outer diameter	m	m
Inner diameter	m	m
Material density	kg/	kg/
Elastic modulus	N	N/
Shear modulus	N/	N/