|Image source: http://nycoveragecounsel.blogspot.com|
According to Gas Volume Requirements for Underbalanced Drilling: Deviated Holes by Ali Ghalambor, hydrostatic pressure is “the pressure of the weight of fluid.” In other words, it is the pressure exerted by a liquid at an equilibrium state due to gravitational force. Its value is considered to be directly proportional to the height of a liquid column of uniform density.
A liquid’s hydrostatic property remains variable because it is heavily influenced by two factors: local gravity and the liquid’s density. The interplay of these quantities results to a particular liquid’s hydrostatic pressure.
|Image source: http://download.autodesk.com|
In SI units, the hydrostatic pressure of a liquid column may be calculated as follows:
Height (in meters) x Density (in kg/m3) x Local Gravity (in m/s2) = Hydrostatic pressure (usually expressed in N/m2 or Pascal)
Hydrostatic pressure, while hardly ever completely accurate, is a very expedient way to relate pressure to a height of liquid. Its practical uses in petroleum engineering include the “hydrostatic test,” a way to determine strengths and leaks in pressure vessels such as pipelines and fuel tanks.
|Image source: http://linkline.ca|
This Twitter account shares more about Ali Ghalambor and his work.