�?�?t ε l ρ l v l + �?�?ε l ρ l v l v l = ε l �?�?τ l + ε l ρ l g �?ε l �?p �?β v l �?v s When the dip angle of your fracture is 0.5, the coincidence diploma on the indoor and field drilling fluid lost control performance is greater, plus the evaluation consequence is better Experimental outcomes of fracture