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.
Lost Returns equivalent Mud Weight
After losing returns and the well annulus has been topped up with water. This calculation will provide an equivalent mud weight at TD that can be used to help determine the fracture/loss pressure
$$ \text{EMW} = 12.5 - \frac{((\text{MW} - \text{WD}) \times 0.052 \times \frac{\text{Water Volume}}{\frac{(\text{ID}^2 - \text{DP}^2)}{1029.4}})}{0.052 \times \text{TVD}} $$
formula shown in Imperial form
Input all the necessary data and press calculate to get the answer
Connected Calculations
Glossary explainers
No linked glossary item
Please provide feedback if you think there is an error