Hydrostatic Pressure for Drilling

on . Posted in Datasheets

Hydrostatic pressure, abbreviated as HP, is the pressure a fluid exerts on an immersed object floating at a certain depth in a liquid.  It is a concept in fluid mechanics and is related to the density of the fluid and the height of the fluid column.

Hydrostatic Pressure Index

• It increases with the depth of the fluid.  The deeper you go in a fluid, the higher the hydrostatic pressure becomes.
• It depends on the density of the fluid.  Denser fluids exert greater hydrostatic pressure for a given depth.
• It is directly proportional to the depth of the fluid.  If you double the depth, you will double the hydrostatic pressure.
• Hydrostatic pressure is a scalar quantity, which means it has magnitude but no direction.  It acts equally in all directions at a specific depth in a fluid.

Hydrostatic Pressure (Mud Weight $$\;lbm/gal$$) formula

$$HP = 0.052 \; MW \; TVD$$     (Hydrostatic Pressure)

$$MW = HP \;/\; 0.052 \; TVD$$

$$TVD = HP \;/\; 0.052 \; MW$$

Symbol English Metric
$$HP$$ = hydrostatic pressure (psi) $$lbf\;/\;in^2$$ -
$$MW$$ = mud weight (ppg) $$lbm\;/\;gal$$ -
$$TVD$$ = true vertical depth $$ft$$ -

Hydrostatic Pressure (Pressure Gradient $$\;psi/ft$$) formula

$$HP = PG \; TVD$$     (Hydrostatic Pressure)

$$PG = HP \;/\; TVD$$

$$TVD = HP \;/\; PG$$

Symbol English Metric
$$HP$$ = hydrostatic pressure (psi) $$lbf\;/\;in^2$$ -
$$PG$$ = pressure gradient $$psi\;/\;ft$$ -
$$TVD$$ = true vertical depth $$ft$$ -

Hydrostatic Pressure (Mud Weight $$\;lbf/ft^3$$) formula

$$HP = 0.006944 \; MW \; TVD$$     (Hydrostatic Pressure)

$$MW = HP \;/\; 0.006944 \; TVD$$

$$TVD = HP \;/\; 0.006944 \; MW$$

Symbol English Metric
$$HP$$ = hydrostatic pressure (psi) $$lbf\;/\;in^2$$ -
$$MW$$ = mud weight $$lbf\;/\;ft^3$$ -
$$TVD$$ = true vertical depth $$ft$$ -

Tags: Drilling