Mud rheology - Power-law model - Power-law index

Input(s)

$\theta_{\mathrm{a}}$: Fann Dial Reading at $600 \mathrm{Rpm}(\mathrm{cP})$

$\theta_{\mathrm{b}}$: Fann Dial Reading at $300 \mathrm{Rpm}(\mathrm{cP})$

Output(s)

n: Power Law index (dimensionless)

Formula(s)

$$ \mathrm{n}=3.322 * \log \left(\frac{\theta_{\mathrm{b}}}{\theta_{\mathrm{a}}}\right) $$

Reference(s)

Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 194.