دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the common name for anhydrous calcium sulphate. caSﾰ4.

n: The main component is calcium sulphate which has no crystal water. The formation which contains this gypse is very usual in drilling and it can contaminate the fresh water drilling fluid. This formation swells when the drilling fluid go through it and som

CaSO4 formation. Usually formed as an evaporite from a drying lake of trapped sea water.

n: CaSO4, microsolubility. Used for depressant of inorganic salt. Usually used for gypse drill fluid.

gyp or anhydrite, CaSO4.

calcium sulfate

a common form of calcium sulfate precipitate or scale. CaSO4-H2O.

n: a compound containing the SO4 group, as in calcium sulfate (CaSO4).

n: All kinds of sulphuric acid salts


one of several minerals containing sulfur ions bonded to oxygen atoms.