�?�?t ε l ρ l v l + �?�?ε l ρ l v l v l = ε l �?�?τ l + ε l ρ l g �?ε l �?p �?β v l �?v s While chosen, stopping lost circulation completely is just not always feasible or necessary. Controlled losses allow for drilling to continue while trying to keep the wellbore complete, stopping an influx of gasoline or flu