Side force at bit in anisotropic formation

Input(s)

p: Buoyed Weight of Drill Collar (ppf)

E: Modulus of Elasticity (psi)

I: Moment of inertia of Drill Collar (in. ${ }^{4}$ )

r: Radial Clearance Between Hole and Collar (ft)

$\theta$: inclination Angle (degree)

W: Weight on Bit (lbf)

Output(s)

F: Side Force on Bit (lbf)

Formula(s)

Reference(s)

Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 378.