�?�?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 Peak of fracture: width of fracture entrance = six: one, the coincidence degree with the indoor and discipline drilling fluid lost control performance is superior, and also the analysis result is excellent Once the pressure stabi