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ppg → gradient, SG, density & hydrostatic pressure.
gradient (psi/ft) = ppg × 0.052Fresh water ≈ 8.33 ppg. The 0.052 factor converts ppg to psi/ft. Hydrostatic pressure = ppg × 0.052 × TVD.
Mud weight is the density of drilling fluid, usually measured in pounds per gallon (ppg). It is the primary control on well pressure: the mud column's hydrostatic pressure must stay between the formation's pore pressure (too light risks a kick or blowout) and its fracture pressure (too heavy fractures the rock and loses circulation).
The key relationships: pressure gradient = ppg × 0.052 psi/ft; specific gravity = ppg ÷ 8.3454; and hydrostatic pressure = ppg × 0.052 × true vertical depth. Enter a depth above to get the hydrostatic pressure at the bottom of the hole.
Field service & billing software for oilfield service companies — capture tickets at the wellsite, bill in days not weeks.