�?�?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 Considering that multiple form of drilling fluid loss can existing sometimes, it is necessary to determine the loss styles and assess proportion of each loss type In order to ascertain the major and secondary loss varieties. The Con