�?�?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 results of lost circulation can be as very little as the loss of a few bucks of drilling fluid, or as disastrous as a blowout and loss of existence, so near monitoring of tanks, pits, and flow from your well, to promptl