Borehole torsion - Cylindrical helical method

Input(s)

$\mathrm{k}_{\mathrm{h}}$: Horizontal Curvature (degree/100ft)

$\mathrm{k}_{\mathrm{v}}$: Vertical Curvature (degree/100ft)

$\mathrm{k}$: Curvature of Wellbore Trajectory (degree/100ft)

a: Inclination Angle (degree)

Output(s)

t: Borehole Torsion-Cylindrical Helical Method (degree/100ft)

Formula(s)

Reference(s)

Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 84.