An essential tool for the Wait and Weight Method (Oil & Gas) for macOS compatible with iPad version.

This application uses the basic calculations of the Wait and Weight Method to control oil wells after the occurrence of kick during drilling operations on floating platforms and landing rigs.

It is an useful tool to import data files to fill worksheets (kill sheets) from our apps for OS X and iOS (Well Control Methods, Drilling Hydraulics and Kick Tolerance) and also for iOS (Drilling Simulator 1, 2 and 3, Drilling Hydraulics 2, Kick Game, LOT Simulator, Well Control Simulator 1 and 2 and MPD Simulator) available for sale in our portfolio on the App Store.

It is can be applied on the field and also help in the understanding of the Wait and Weight Method for well control.

This app was developed based on existing spreadsheets. There is no comparison with any other software.

Our goal was to create a low-cost application with the help of experts to share with drilling engineers, technicians, drillers, students and teachers of drilling engineering.

There is no intention to replace the professional softwares.

You can contribute with suggestions for improvements, correcting the translation to english, reporting bugs and spreading it to your friends.



These tools & materials are provided 'as is' without warranties of any kind, express or implied.

Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools.

Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.

What’s New

Version 2.1

- Added ability to set decimals and to set value to hydrostatic factor
- Added compatibility to import data file from "Drilling Simulator 3" and "Drilling Hydraulics 2" for iOS.
- Added Riser Safety Margin calculations
- Dark Mode on Mojave ready.
- Added several improvements
- Bug fixes

Note: This update is recommended for all users.

App Privacy

The developer, Carlos Moura, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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