دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

calcium chloride salt.

n: a drilling platform that rests on a steel or concrete caisson. Used mainly in the Arctic, caissontype drilling platforms are mobile offshore drilling units built to withstand the ravages of moving ice in Arctic waters.

n: see filter cake.

n: A tier of penetrant medium adhering to the borehole face in the filtration process of solid phase of drill fluid.

filter or mud cake, stranded by dehydration on the face of a permeable formation by fluid loss.

n: the character or state of the drilling mud filter cake. According to API RP I3B, such notations as hard," "soft," "tough," "rubbery," and "firm" may be used to convey some idea of cake consistency.

n: A very important target. The lower the filter loss of drill fluid, the more steady the borehole face is.

n: the thickness of drilling mud filter cake.

n: The measurement of the thickness of the filter cake deposited by a drilling fluid against a porous medium, most often following the standard API filtration test. Cake thickness is usually reported in 32nd of an inch.

n: Refers to the calcium mud that uses calcium chloride as calcium salt. Its performance is high rejection capability.

n: the active ingredient of slaked (hydrated) lime, and the main constituent in cement (when wet). Referred to as lime" in field terminology. Its symbol is Ca(OH)2

n: Ca(OH)2, white powder. The pH value of its saturated solution is 12.4. Usually used for depressant of inorganic salt, calcium mud and clearing excessive carbanion in drill fluid.

Ca(OH)2, slaked lime.

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

gyp or anhydrite, CaSO4.

n: a chemical compound of calcium, sulphur, and oxygen, CaSﾰ4. Although sometimes considered a contaminant of drilling fluids, it may at times be added to them to produce certain proper- ties. Like calcium carbonate it forms scales in waterhandling facilities, which may be hard to remove. See anhydrite, gypsum.