About this app
------- Updated. Added more than 250 oilfield calculators ------- Aims of this application to make ease the life of Oilfield specialist and Petroleum, Mud Engineers by providing correct hand calculations. It is meant for Engineers,Specialist who are involved in Oil and Gas exploration and Drilling. This application is an essential supporting tool. P.S.: Best way for correct calculation is the hand calculation. Application builded by last updated API (American Petroleum Institute) Data. -Capacities & Volumes for Downhole formulas -Capacities & Volumes for Tanks formulas -Pump Output & Rate -Pump Press.Relationships -Equivalent Circulating Density (ECD) -Trip Calculations -Pressure & Gradient -Kill Sheet Calculations -Kick Related -Kick Related Engineering -Volumetric Method calculation -Lubricate & Bleed -Bullheading Calculations -Stripping/Snubbing -Subsea -Accumulator Sizing -Mud & Cement -Hydraulics -Tripping Rules of Thumb -Stuck Pipe -Free Point & Stretch Estimates -Estimating Temp. Drop Across a Choke or Orifice -Bit Nozzle Pressure Loss -Estimating Gas Well Flow Rates -Area of a Circle -Force & Pressure -Weight of Spiral Drill Collar -Buoyancy Factor (BF) -Surface & Bottom Hole Pressure in Full Gas Column -Pipe Elongation and more formulas... Also this app has: -Coiled Tubing Stretch Table -Mud Weights properties -Acronyms & Abbreviations -Conversion Factors -Constants -Drillpipe capacity and displacement -Drill Collar Capacity and displacement -Casing Capacity -Hole Capacity and more information… Good Luck in Your Job!!! ---------------------- Other best oilfield apps in App Store: - Annular Volume Calculator; - Casing make-up Torque Chart; - Surge & Swab Pressure Calc; - PDC Bit & Drilling Calculator; - Kick Tolerance Calculator; - ASTM Tables: 54A, 54B, 54D; - and MORE... ---------------------- Follow us: Instagram: @NationalOilfield Facebook: @OilfieldTeam
Latest release
What’s New
- Updated all data as per API last release;
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 19, 2026 · 7:39 PM $1.99
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