�?�?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 Although most popular, stopping lost circulation absolutely is just not generally possible or essential. Controlled losses allow drilling to carry on when retaining the wellbore comprehensive, blocking an influx of gasoline