�?�?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 If the quantity of fluid inside the wellbore drops due to lost circulation (or https://princedirectory.com/listings13736266/the-wellbore-fluid-loss-diaries