�?�?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 The consequences of lost circulation can be as minor as the loss of some https://medium.com/@vertechs/the-unseen-engine-how-advanced-drilling-fluids-and-smart-additives-are-reshaping-energy-81a8553f41d0