�?�?t ρ l k + �?�?x i ρ l k v l = �?�?x j μ + μ t σ k �?k �?x j + G k �?ρ l ε �?Y M The consequences of lost circulation can be as tiny because the loss of a few pounds of drilling fluid, or as disastrous as a blowout and loss of daily life, so near checking of tanks, pits, and circulation from your well, to rapidl