�?�?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 The decrease in annular return flow will induce the move pace of drilling fluid https://shaneokfsc.shivawiki.com/8287470/the_best_side_of_drilling_fluid_loss