The pressure gets read at the pump and written down. Then somebody works out the EMW, somebody else works out the MAASP, and the two answers do not match. This calculator takes the three numbers you already have and returns both, with a check on screen that proves the arithmetic closed.
Enter shoe TVD, the mud weight you tested on, and the pressure you read. The app returns the EMW the formation held and the surface pressure you are allowed to shut in on once the hole is up to the planned weight.
MAASP at the mud weight you are actually going to carry, not the one you tested on. It changes every time the weight changes, so the app recomputes it as you type rather than leaving you a single figure taped to the choke panel.
Give it the EMW the programme calls for and it returns the surface pressure that reaches it. You know where you are stopping before the pump starts, instead of working it out with pressure already on the well.
MAASP evaluated back at the test mud weight has to return the pressure you entered. The app shows that figure next to the result, so a wrong TVD or a wrong gradient is visible on the screen instead of buried two steps down.
Every test lands in a dated table with the well, the section, the type, the mud weight, the pressure, the resulting EMW and who ran it. Download the whole log as CSV for the morning report.
Shoe TVD and the mud weight you tested on. The app works out what one ppg is worth in pressure at that depth.
The surface pressure at leak-off, or the EMW a FIT is being taken to. The EMW appears as you type.
MAASP updates for the weight you will be carrying, with the self-check beside it so you can see it closed.
Add the test to the log with initials and a note. Export the log as CSV whenever the paperwork wants it.
Built by people who have watched a leak-off test go in on a scrap of paper. Oil Rigs Now has been making tools for oilfield crews since 2011. This one runs entirely in the browser. There is no account and no signal needed, and nothing leaves the device. Install it to a phone home screen and it opens on a location with no bars.