�?�?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 This proactive solution allows stop pressure drops which could produce fluid loss incidents, represented because of the tension gradient (ΔP) inside the wellbore: Figure 6b demonstrates that, during circulation, drillin