Downhole formulas,
field-ready.

Pressure control, tubing mechanics, free point, collapse/burst, and mud weight — every calculation calibrated to real-world well control practice. Switch between Field and Metric units, save jobs, and ask the AI assistant for a walkthrough.

Browse free formula guides

Pressure Control

· Kill Mud Weight
· ICP / FCP
· MAASP
· Formation Pressure

Kill Sheet

· Wait & Weight worksheet
· Strokes to bit / surface
· Pressure step-down

Kick Tolerance

· Max influx before frac
· GO / CAUTION / STOP verdict

Directional Drilling

· Dogleg Severity
· Minimum Curvature Method

Tubing Movement

· Hooke's law
· Piston effect
· Ballooning
· Thermal

Free Point

· Stretch method
· Stuck-pipe depth

Fishing

· Pipe body yield
· Safe pull / overpull
· Jar impact energy

Collapse / Burst

· API 5C3 yield collapse
· Barlow burst

Hydrostatic

· HP from MW × TVD
· Formation strength

Capacities & Volumes

· Pipe / Annular capacity
· Displacement strokes

Mud Weight

· Weight up (barite)
· Weight down (dilution)

Cementing Volumes

· Slurry, sacks, mix water
· Displacement + strokes
· Slurry density

Casing Design Wizard

· Setpoints → Loads → Pipe pick
· Auto-verify with SF, PASS/FAIL

Spec Library

· Casing / Tubing / DP
· API 5CT standard sizes

SAFETY NOTICE

These calculators support field decisions but do not replace the well control organisation on site. Always cross-check against the well program, IWCF/IADC procedures, and current company standards before executing a job.

Downhole formulas,field-ready.