Mud rheology - Power-law model - Consistency index

Input(s)

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

$\mathrm{n}$: Power-Law index (dimensionless)

Output(s)

$\mathrm{K}$: Consistency index $(\mathrm{cP})$

Formula(s)

$$ \mathrm{K}=\frac{510 * \theta_{\mathrm{a}}}{511^{\mathrm{n}}} $$

Reference(s)

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