Work out kick tolerance instantly with clear inputs, formula shown and shareable results.
MAASP is the surface pressure at which the casing shoe would fracture: 0.052 x (leak-off equivalent - mud weight) x shoe TVD. Kick tolerance converts that into how large an influx can be circulated out without breaking down the shoe, which determines how much further the hole can safely be drilled.
MAASP
MAASP (psi) = 0.052 x (LOT equivalent ppg - mud weight ppg) x shoe TVD (ft)
Kick intensity margin
Margin (ppg) = LOT equivalent - current mud weight
Kick tolerance is a critical well control calculation and must be performed by qualified well engineers using verified leak-off test data and the operator's own well control policy.
Mud weight must rise with pore pressure, narrowing the gap to the shoe strength, while the open hole below the shoe lengthens. Both effects reduce the influx that can be handled.
No. Wellbore stability, differential sticking risk, hole cleaning, and the need to isolate loss or flow zones all influence casing depth, alongside kick tolerance.