�?�?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 original contributions introduced In this particular analyze are A part of the posting. Even more inquiries might be directed to the corresponding author. (one) The control efficiency of drilling fluid loss is defini