�?�?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 sWhen the dip angle of the fracture is 0.5, the coincidence degree with the indoor and industry drilling fluid lost control performance is higher, as well as the evaluation end result is bestI conform to obtain i