دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a nonionic polymer (polyacrylamide) used in flocculation, clarifying and even gelling acids and other brines. Very stable, but difficult to effectively break.

n: dissolved calcium ions in sufficient concentration to impart undesirable properties, such as flocculation, reduction in yield of bentonite, and increased fluid loss, in a drilling fluid. See also anhydrite, calcium carbonate, calcium sulphate, gypsum, lime.

n: The process that calcium ion enters into the drilling fluid when drilling in the calcareous formation or cement plug.

adj: (slang) commonly used to describe moderate to severe flocculation of mud due to various contaminants. Also called gelled-up.

dropping suspended particles out of a fluid by agglomerating them into larger, easier separated particles.

n: see flocculation.

n: In drilling-fluid terminology, a synonym for Flocculation


forming a larger mass from smaller ones by collision and sticking together.

n: the dispersion of solids that have stuck together in drilling fluid, usually by means of chemical thinners. See flocculation.

n: (1) The process of thinning the drilling fluid by bonding with (neutralizing or covering) the positive electrical charges of drilling fluid additives to prevent one particle of drilling fluid from being attracted to another particle. (2) Breakup of flocs

dispersing a clump or a gathering or “flocculated” of particles. Usually accomplished by dispersants or solvent thinners.

n: material or chemical agent that enhances flocculation.

n: the coagulation of solids in a drilling fluid, produced by special additives or by contaminants.

n: the coagulation of solids in a drilling fluid produced by special additives or contaminants in the mud.

attraction, gellation and drop out of suspended particles from a liquid.

adj: see clabbered.

n: oil-field jargon usually referring to any fluid with high gel strength and/or highly viscous properities. Often a state of severe flocculation.

n: a substance, usually a solid, that separates from a fluid because of a chemical or physical change in the fluid. v: to separate in this manner.

n: material that separates out of solution or slurry as a solid. Precipitation of solids in a drilling fluid may follow or slurry as a or coagulation, such as the dispersed red-bed clays upon addition of a flocculation agent to the fluid.