دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a substance or material added to cement to make it dense enough for use in high-pressure zones. Sand. barite. and hematite are some of the substances used as heavyweight additives.

n: a kind of additive which is mixed with cement slurry or drilling fluid so as to increase their density

n: a kind of nature Fe2O3 mine with a relative density of 4.9-5.3 and easy to acidify ,usually used as adulterant of drilling fluid which is used in drilling the high pressure formation

a natural deposit of iron oxide.

n: A mineral composed of ferrous carbonate, FeCO3, and having 3.8 g/cm3 specific gravity. It is found as an accessory mineral in some shales and carbonate rocks and also in some barite and hematite ores. FeCO3 is readily soluble in acids and breaks down slow

iron carbonate.