�?�?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 Neglecting formation conduct: Overlooking anxiety versions in tectonically Lively spots or overlooking weak formations when choosing mud properties.  Determine 6b demonstrates that, through circulation, drilling fluid flows down