Plastic viscosity - Bingham plastic model

Input(s)

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

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

Output(s)

PV: Plastic Viscosity (cP)

Formula(s)

$$ \mathrm{PV}=\left(\theta_{600}\right)-\left(\theta_{300}\right) $$

Reference(s)

Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 192.