Mud Engineer

Mud Engineer App – Drilling Fluids Calculator

Mud engineers play a crucial role in keeping drilling programs running smoothly. The Mud Engineer App is an essential field tool that gives you 14 drilling-fluid and well-control calculators in one place, built for rig work: fast input, clear step-by-step equations, professional PDF reports, and full offline use.

CALCULATORS

• Final Mud Weight – mix two fluids and get the resulting weight and volume

• Volume – volumes of two fluids needed to build a required volume at a target weight

• Reduce Mud Weight – barrels of a lighter fluid (water, seawater, diesel) to dilute the mud

• Weight Up – sacks, lb/bbl, total material, volume increase and final volume (barite, CaCO3, hematite)

• Hydrostatic Pressure and pressure gradient

• Equivalent Circulating Density (ECD)

• Annular Velocity

• Triplex Pump Output – bbl/stroke, bbl/min and flow rate

• Kill Sheet – Kill Mud Weight, ICP and FCP, with safety margin

• Bottoms Up – annular volume, strokes and time

• Pipe Capacity & Displacement – open-ended and closed-end

• Oil/Water Ratio – from retort readings, with oil or water to add to reach a target ratio

• Rheology – PV, YP, apparent viscosity, n and K from Fann 600/300 readings

• EMW & Pressure Gradient

BUILT FOR THE FIELD

• Step-by-step worked equation with your own numbers, plus the formula reference

• Change units right inside each field – values convert automatically

• Quick-value chips: barite, CaCO3, hematite, water, seawater, diesel, sack sizes, pump efficiency

• Smart checks catch unit slips (e.g. 35 typed into an SG field) and impossible inputs

• Values carry over between calculators: pump output feeds Bottoms Up and Annular Velocity, the new mud weight feeds Hydrostatic, ECD and Kill Sheet

WELLS & HISTORY

• Manage multiple wells (name, rig, field); each well keeps its own calculations and values

• Every calculation is saved automatically in a searchable history, filtered by well, date or calculator

• Export history to CSV (Excel) or a combined PDF

PROFESSIONAL PDF REPORTS

Input and result tables, the worked equation, the reference, the well, your name or company, the date and an app watermark – ready to share.

UNITS & SETTINGS

• Oilfield and metric units: ppg, SG, g/cm³, kg/m³, pcf, bbl, m³, gal, L, ft, m, in, mm, psi, bar, kPa, gpm, L/min, bbl/min, m³/min

• Exact unit conversions

• English and Arabic interface

• Favorites and search on the home screen

• Adjustable decimal places, light or dark theme

• Works fully offline – no account, no ads, your data stays on your device

Formulas follow standard oilfield references (Lapeyrouse, Formulas and Calculations for Drilling; IWCF kill sheet; API RP 13B) and are verified against published worked examples.

Special thanks to Eng. Mahmoud Elbeltagy for contributing to the development of these calculations.