Tripability Analysis of Casing Strings in Directional Wells Using the Continuous Beam-Column and Buckling Theory

Table 2

Basic calculation parameters.

Name	Value
Well depth	4558 m
Kickoff point	1267 m
Build-up rate	4°/30 m
Radius of curvature,	430 m
Vertical section,	100 m
Build-up section,	100 m
Diameter (borehole),	215.9 mm
Diameter (casing),	177.8 mm
Diameter (coupling),	200.03 mm
Wall thickness (coupling),	11.12 mm
Young’s modulus,
Poisson’s ratio,	0.3
Friction coefficient	0.2