دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The inadvertent mechanical incorporation and dispersion of air into a drilling fluid system. See also Aeration.

n: 1. a substance whose particles are so fine that they will not settle out of suspension or solution and cannot be seen under an ordinary microscope. 2. the mixture of a colloid and the liquid. gaseous, or solid medium in which it is dispersed.

n: A particle smaller than 2 microns. The size and electrical charge（电荷） of these particles determine the different phenomena observed with colloids, for example, Brownian movement.

a substance with particle size so fine that it exists as a stable dispersion rather than settling out.

n: finely divided particles of ultramicroscopic size suspended in a liquid.

n: The system that superfine particle suspend in the liquid media steadily and homogeneously. For example, cement slurry.

a dispersion of fine particles, held by charge or other force in a stable suspension.

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: (1) Any chemical that promotes the subdivision of a material phase. (2) Any chemical that promotes dispersion of particles in a fluid. Frequently, a deflocculant is inaccurately called a dispersant. Caustic soda is a dispersant but not a deflocculant.

n: that part of a drilling mud . clay, shale, barite, and other solids - that is dispersed throughout a liquid or gaseous medium. forming the mud.

n: The scattered phase (solid, liquid, or gas) of a dispersion. The particles are finely divided and completely surrounded by the continuous phase.



the internal phase in an emulsion – i.e., the droplets or bubbles.

n: a suspension of extremely fine particles in a liquid (such as colloids in a colloidal solution).

n: Subdivision of aggregates. Dispersion increases the specific surface of the particle, which results in an increase in viscosity and gel strength.

a mixture of a internal phase of solids, droplets or bubbles that stay relatively suspended in a continuous fluid.

n: see continuous phase.

n: a mixture in which one liquid, termed the dispersed phase, is uniformly distributed (usually as minute globules) in another liquid, called the continuous phase or dispersion medium. In an oil-in-water emulsion, the oil is the dispersed phase and the water the dispersion medium;in a waterin- oil emulsion, the reverse holds.

n: A substantially permanent heterogeneous mixture of two or more liquids that do not normally dissolve in each other but are held in a dispersed state, one within the other. This dispersion is accomplished by the combination of mechanical agitation and pres

a physical mixture of two or more immiscible phases.

n: a semisolid, jelly like state assumed by some colloidal dispersions at rest. When agitated. the gel converts to a fluid state. Also a nickname for bentonite. v: to take the form of a gel;to set.

n: a semi-solid,jelly-like state assumed by some colloidal dispersions at rest,when agitated,the gel converts to a fluid state.

a fluid with a higher than normal viscosity created by a gallant material such as polymer.