Training / worksheet aid only. Verify every input and result against the approved rig well-control procedures, current well data and supervisor instructions. Not a substitute for a certified kill sheet.
Well / Operation
Measured Depths & Pump Data
Drillstring Data
Enter each section length and pipe internal diameter (ID). You can type additions such as 100+50 directly into numeric cells. Capacity is calculated automatically from your dimensions.
Annulus Data
Enter values such as 100+50 directly into cells. Enter annular length, outer diameter of the surrounding hole/casing (OD boundary), and outer diameter of the pipe (OD pipe). Annular capacity is calculated automatically.
Circulation
Shut-in & Well Data
Maximum Allowable Mud Weight
LOT pressure ÷ Casing Shoe TVD ÷ 0.052 + LOT Mud Weight. Alternative: Fracture Gradient ÷ 0.052.
Initial MAASP
(Maximum Mud Weight − Current Mud Weight) × 0.052 × Casing Shoe TVD
Kill Mud Weight
SIDPP ÷ Hole TVD ÷ 0.052 + Current Mud Weight
New MAASP With Kill Mud
(Maximum Mud Weight − Kill Mud Weight) × 0.052 × Casing Shoe TVD
Circulating Pressures
ICP = SIDPP + Slow Pump Rate Pressure. FCP = Kill Mud Weight ÷ Current Mud Weight × Slow Pump Rate Pressure.
Pressure Stepdown
(ICP − FCP) ÷ Surface-to-Bit Strokes × 100