�?�?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, halting lost circulation fully will not be generally feasible or needed. Controlled losses allow for drilling to continue while keeping the wellbore whole, preventing an inflow of fuel or fluid into your wellb