Note: Calculations provided on this website are for reference and verification purposes only. Engineers and professionals should independently confirm all results using base principles and industry standards before application.
Drillbit Hydraulics
A calculator to establish TFA and its effect on bit hydraulics, namely pressure drop, HSI and impact force
The formulas used are: $$ \text{Pressure} = \frac{\text{Mud Weight} \times Q^2}{10858 \times \text{TFA}^2} $$ $$ \text{HP} = \frac{Q \times Pressure}{1714.28571429} $$ $$ \text{HSI} = \frac{hp}{0.7854 \times \text{Bit Size}^2} $$ $$ \text{Impact} = 0.000516 \times \text{mw} \times Q \times \frac{0.32086 \times Q}{\text{TFA}} $$
formula shown in Imperial form
Input all the necessary data and press calculate to get the answer
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