Changes

* The density of the liquid (mud weight)

* The density of the liquid (mud weight)

The total volume of liquid or shape of the hole have no influence on hydrostatic pressure, but the height of the liquid column (depth) must be measured in the same direction as the force due to gravity, that is, true vertical. This consideration is important in highly deviated and horizontal wellbores. The hydrostatic pressure (P) at any depth in a wellbore is calculated as follows:

The total volume of liquid or shape of the hole have no influence on hydrostatic pressure, but the height of the liquid column (depth) must be measured in the same direction as the force due to [[gravity]], that is, true vertical. This consideration is important in highly deviated and horizontal wellbores. The hydrostatic pressure (P) at any depth in a wellbore is calculated as follows:

:<math>\mbox{P} = 0.052 \times \mbox{MW} \times \mbox{D}</math>

:<math>\mbox{P} = 0.052 \times \mbox{MW} \times \mbox{D}</math>