RIG-PRO Toolbox is an offline calculator suite for drilling-fluid engineers, mud engineers, supervisors, and well-site personnel. It runs entirely on your phone — no sign-in, no network, no ads — so it works on the rig floor where connectivity is unreliable.

WHAT'S INCLUDED — 19 calculators

• Engineering Suites — Well Control (KMW, MAASP, ICP/FCP, strokes to bit, trip fill), ECD & Hydraulics, Surge/Swab & Trip Margin, Cementing, Directional (minimum curvature dogleg, closure, build, turn), Tubulars (buoyed hookload, stretch), Fluids Lab (retort, salinity, hardness, MBT, additive sacks), Lost Circulation, Hole Cleaning.

• NAF / RDF Dilution — Field dilution accounting with auto open-hole volume, casing/active/losses bookkeeping, oil/water split, US and SI rates.

• Mud Weight — Weight-up with barite (≤ 20.7 ppg) or calcium carbonate (≤ 11.49 ppg) including sack count.

• Mix Fluids — Any-row weighted-average blend; results in ppg and pcf.

• Mixing Drums / Cans / Pails — Liquid-additive packaging weight and the number of drums needed for a given percentage in mud volume.

• Bit Hydraulics — TFA, ΔP at bit, % of standpipe lost at bit, nozzle velocity, hydraulic impact, HHP, HSI.

• Tank Volumes — Rectangular, vertical-cylindrical (from circumference), and trapezoidal sloping tanks.

• Rheology Swifter — PV, YP, LSRYP, apparent viscosity, TY/YP, plus predicted Fann readings, normalized fluid loss to 30 minutes, and a recommended PV envelope from mud weight.

• Cutting Box Estimation — Gauge-hole cuttings volume in 4.6 bbl boxes.

• Hole Washout — Marker-vs-theoretical comparison with average hole size.

• Slug Pipe — Slug mud weight needed for a target dry-pipe length.

• OBM / NAF OOC — Oil-on-cuttings retort metrics with daily oil and whole-mud loss, base-oil and whole-mud cost lost per day.

• Adjust O/W Ratio — Current oil/water ratio and the precise oil or water addition to hit a target ratio.

• Solids Analysis — Full weighted-mud volumetric and material balance plus an unweighted-mud variant and logical-solids rules of thumb.

• Diesel Overbalance — Annular diesel slug to drop overbalance to a target value, with field allowance.

• Treating Contaminants — Loading (lb/bbl), sacks, and time between sacks.

• Evaporation Rate, Dilution Rate, GrandSeal Packaging — Quick field helpers.

DESIGNED FOR FIELD USE

• 100% offline — no account, no network, no telemetry.
• Material 3 dark and light themes.
• Searchable home screen with one-tap access to every calculator.
• Inputs round-tripped so you can iterate quickly.
• Every screen exposes the underlying formula so calculations can be reviewed and audited.

IMPORTANT

Calculator output is decision support, not an approved operating procedure. Always verify inputs, units, formula applicability, and results against the drilling program, well-control procedures, lab standards, OEM data, and the responsible engineer's review before acting on them.

Built by drilling-fluid practitioners, for drilling-fluid practitioners.

Rig-Pro Solutions

Additional Information