It may be required to bleed annulus pressure due to requirement of a gas or an oil well. This may be difficult to organize due to log bleeding time. Many softwares can calculate bleeding time. However, it may be handy to have this app in your iPhone to save time for decisions. 

If you know the below information of a well, gas bleeding time can be estimated thru this app.

- Internal Pressure
- Nozzle ID
- Outer Pipe ID
- Inner Pipe OD
- Pipe Length to the Top of Fluid
- Average Temperature of gas column

You need to click and enter all the required data mentioned above to the entry field one by one. The result will be automatically calculated while entering each value. In order to get the correct result, all the values need to be entered correctly and they will be shown both in seconds and hours independently.

As the calculations in the calculator use published formulas, it may bear error factors compared to experimental values. Therefore, they should be used only for educational purposes and this app does not guarantee the correctness of the formulas either.