دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a clay mineral often used as an additive to drilling mud. It is a hydrous aluminum silicate capable of reacting with such substances as magnesium and calcium. See bentonite.

n: a clay mineral common;y used as an additive to drilling muds. Sodium montmorillonite is main constituent in bentonite. Calcium montmorillonite is the main constituent in low-yield clays.

a water reactive clay mineral, now called smectite, a common component of bentonite.