denotes the dynamic shear with the product, n could be the circulation pattern index, dimensionless; and K would be the regularity issue of the drilling fluid, Pa·sn. Peak of fracture: width of fracture entrance = six: one, the coincidence diploma on the indoor and area drilling fluid lost control https://drillingfluidsinoilandgas11985.wikigdia.com/8068008/the_5_second_trick_for_lost_circulation_in_drilling