�?�?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 paper will go over the following major matters: Deep well drilling technologies are of critical great importance while in the drilling business. In this method, the drilling fluid (drilling mud) is used to keep up force stabilit