In the hydro-static pressure formula, if you use an oil field unit, you must see the hydro-static formula like this
Pressure, psi = 0.052 x Mud Weight (ppg) x TVD (ft)
I got the question asking about how the constant 0.052 is figured out.
What is 0.052?
0.052 is a constant used for converting ppg-ft into pound per square inch (lb/in2)
Do you know how it comes from? Let’s get started
First of all, the unit conversions that you need to know are as follows:
1 gallon = 231 cubic inch (inch3)
1 ft = 12 inch
Convert density from ppg (pound per gallon) to lb per cubic inch
Basic hydrostatic pressure
The constant can be determined by substituting the unit conversion.
The constant is 0.051948 and if we round it up, it will be 0.052.
Cool 🙂
Why don’t we consider the gravity acceleration in calculating the mud hydrustatic pressure ?
Ahmed,
This is already accounted for the gravity of acceleration.
I have another one
Psi/ppg = 0.433/8,3 =0.051908
Slightly different, is it right?
Once you round up, it is the same figure.
thanks!