# Oilfield Essentials > Oil and gas exploration and drilling calculation tool with unit conversion. (iPhone/iPad app by Matthew Gaber.) - Source: https://appshunter.io/ios/app/oilfield-essentials/id442929790 (this page in markdown: same URL + `.md`) - Developer: [Matthew Gaber](https://appshunter.io/developer/394383608) - Category: Utilities, Productivity - Price: $12.99 - Rating: 1.20/5 from 5 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 5.1.1 · 33 MB - Languages: American English - Released: 2011-08-26 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/oilfield-essentials/id442929790/reviews.md ## What is Oilfield Essentials? Oilfield Essentials is for anyone involved in Oil and Gas exploration and drilling. Oilfield Essentials contains twenty three pages of frequently used calculations in day to day Drilling and Oilfield operations. From rig calculations such as the Leak Off Test, Kill Mud Weight and Directional Driller's Survey Analysis to Evaluation Calculations that cover Wireline such as Weak Point Selection and Average Hole Size through to Reservoir Evaluation with detailed Oil and Gas Zone Analysis. Beautifully designed and laid out Oilfield Essentials is a pleasure to use with both Imperial and SI units supported. Other functionality includes automatic data saving capacity, Airprint support, Email the results as a pdf, built in checks and limits and a shake to reset function. The calculations include, ∅ Pipe Tally with Pipe Specs, Capacity, Displacement, Offset and CSV file in email. ∞ Unit Convertor ∉ Directional Driller's Survey Analysis with TVD, DLS, Vertical Section, Northing, Easting, UTM North, UTM East and the option for start point Vertical Section North, East and Azimuth. Attaches CSV file to email. ϕ Formation Integrity ∅ Leak Off Test ▼ Annular Volume, Pipe Volume and Bottoms Up Strokes ⊇ Drill Pipe Stuck Point ∜ Pump Output ∜ Pipe Displacement ∏ Kill Mud Weight ∑ Mud Up with Barite ⊗ Quick Look Pay Zone Analysis ∅ Drilling Cost Analysis ∞ Carbide Tracer Hole Size ▼ Equivalent Circulating Density and Annular Pressure Loss ∏ Hydrostatic Loss $ Detailed Oil Zone Analysis £ Detailed Gas Zone Analysis ζ Corrected D Exponent ℉ Formation Temperature β Average Hole Size ∀ Hydrostatic Pressure ∜ Wireline Stuck Point ₪ Weak Point for Open Hole ◗ Weak Point for Cased Hole The following units are supported, • Inches or Millimeters • Feet or Meters • Pounds per Gallon or Grams per Cubic Centimeter • Pounds per Square Inch or Kilopascals • Barrels or Cubic Meters • Cubic Meters per minute or Barrels per minute • Acres or Hectares • Fahrenheit or Celsius The Application is fully self contained requiring only minimal input to perform complex calculations. Drill Pipe, Tubing, Casing, Pipe Displacement and Wireline Specifications are preloaded in the application making it easy to specify sizes and weights. The built in checks and limits are to validate user input, prevent typo's and stop erroneous answers from being returned. The checks and error message setup is such that you will not be prevented from working with values outside the built in limits, rather a warning pops up to let you know the values in question are either very high or very low for a given situation. However where the answer makes no sense at all you will be prompted to check the input. You can leave the application, make a phone call, find a restaurant, play a game, whatever it happens to be then come back to the app and any data that you had entered will still be there. At the press of a button you can capture the results of any page and email them from within the application as a .pdf. Once you are done with a page you can shake the iPad or iPhone and the page will reset. ## Key features - Rig calculations (Leak Off Test, Kill Mud Weight) - Evaluation calculations (Wireline, Hole Size) - Reservoir analysis (Zone Analysis) - Imperial and SI unit support - Automatic data saving - Email results as PDF - Built-in checks and limits ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/oilfield-essentials/id442929790/reviews.md ### 1/5 — Garbage *2019-10-16* Most of the formulas don’t work, kind of disappointed as it would be a handy app for displacements or spotting lcm but like I said, formulas don’t work on my phone. ### 1/5 — Please update *2018-10-18* Needs to be updated. Not enough casing sizes. ### 1/5 — Save your money *2016-09-22* Inaccurate and difficult to use. Don't try and contact developer from app, my second wife is more helpful and responsive. ### 4/5 — Weight *2016-02-24, version 2.1* Should add KG/M3 for fluid weights. ### 1/5 — Waste of money *2014-12-29* I want my money back. Payed $12 for this app and the displacement calculations aren't even right. Says 5 1/2 23 ppf casing bbls/ft is 0.00820. Way off. C'mon man ### 1/5 — Soooo not worth it *2013-03-15* It's fun to play with while watching the guys pull pipe or when logging but not allot of things I can use on a day to day basis. My free well control data book and a calculator are WAY more useful ### 1/5 — Essential *2012-05-11, version 1.6* Not worth it. App does simple calculations that can be done on calculator and has no value tables. ### 4/5 — wrong!! *2012-04-03* the bottoms up calculations are completely WRONG!!!! ## Frequently asked questions about Oilfield Essentials ### What is Oilfield Essentials? Oilfield Essentials is a utility application designed to provide frequently used calculations for day-to-day drilling and oilfield operations. It covers rig calculations, evaluation calculations, and reservoir analysis, supporting both Imperial and SI units. ### What types of calculations does Oilfield Essentials include? Oilfield Essentials includes a comprehensive list of calculations such as Pipe Tally, Unit Converter, Directional Driller's Survey Analysis, Leak Off Test, Kill Mud Weight, Pump Output, and detailed Oil and Gas Zone Analysis, among many others. ### Does Oilfield Essentials support different unit systems? Yes, Oilfield Essentials fully supports both Imperial and SI units. This includes conversions for measurements like inches/millimeters, feet/meters, and pounds per gallon/grams per cubic centimeter. ### Can I save and share my calculation results with Oilfield Essentials? Yes, the application features automatic data saving capacity. You can also capture the results of any page and email them as a PDF directly from within the app. ### What devices is Oilfield Essentials compatible with? Oilfield Essentials is available for iPhone, iPad, and iPod. It is designed to be fully self-contained, requiring minimal input to perform complex calculations. ### How does Oilfield Essentials handle user input and potential errors? The app includes built-in checks and limits to validate user input and prevent erroneous answers. It will display warnings for very high or low values and prompt users to check input if the answer makes no sense. ### How often is Oilfield Essentials updated? The latest version of Oilfield Essentials is 2.1, which was last updated on June 1, 2015. Users can expect a stable set of features based on this release date. ### What is the price of Oilfield Essentials? Oilfield Essentials is a paid application priced at $12.99. There are no in-app purchases or advertisements associated with this utility. ## Version history (last 5 releases) ### 2.1 — 2015-06-01 This app has been updated by Apple to display the Apple Watch app icon. Updated for iPhone 6 and 6 plus ### 2.0 — 2014-01-23 Pipe Tally page added, includes Drill Pipe Specs, running total of Pipe Displacement and Capacity and depth offset option. Automatically creates and attaches a CSV file and pdf to the email. Automatically lays out spreadsheet for different rigs. Updated Directional Driller Page to include a CSV of the data in the email. Added a Unit Convertor Page. Updated Volumes and Bottoms Up to allow user input for Pipe and Casing Specs. Updated Weight Up Page, changed units from bags to lbs. ### 1.8 — 2013-09-08 Updated Pipe Displacement Page to include Tubing specifications. Updated Annular Volume, Pipe Volume and Bottoms Up Page with further error checks, summary of depths and lengths input and an instruction page. Updated Equivalent Circulating Density Page with further Casing Specifications. Updated Carbide Tracer Page with further Casing Specifications. ### 1.7 — 2012-09-04 New keyboard added to the Directional Survey page to allow negative numbers to be entered. ### 1.6 — 2012-04-02 Three new pages and five new calculations added, Pump Output, Pipe Displacement and Annular Volume, Pipe Volume and Strokes for Bottoms Up. 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