�?�?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 MIn the event the dip angle from the fracture is 0.5, the coincidence diploma with the indoor and industry drilling fluid lost control efficiency is better, and the evaluation consequence is best(1) The control performance of drilling fluid