�?�?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 Neglecting formation behavior: Overlooking pressure versions in tectonically active regions or overlooking weak formations https://vertechs1.blogspot.com/2025/10/advancing-drilling-performance-with.html