Drilling Mud - Formation Pressure Balance

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\rho = (p_f + p_{safety}) / (g \cdot TVD)

Symbol	Meaning	Unit
$TVD$	True Vertical Depth	m
$p_f$	Formation pressure	psi

Source: IADC Drilling Manual

Mud density needed to balance formation pressure - mud hydrostatic > formation pressure + safety margin.