دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the lowest temperature at which the chemical aniline and a solvent (such as the oil in oil-base muds) will mix completely. In general, the oil of oil-base muds should have an aniline point of at least 150F (66"C) to obtain maximum service life from the rubber components in the mud system.

n: The lowest temperature in which the same volume of oil and aniline dissolve in each other.

the aromatics content of a mixture.

n: circulating fluid, one function of which is to lift cuttings out of the wellbore and to the surface. It also serves to cool the bit and to counteract downhole formation pressure. Although a mixture of barite, clay, water, and other chemical additives is the most common drilling fluid, wells can also be drilled by using air, gas, water, or oil-base mud as the drilling mud. Also called circulating fluid, drilling mud. See mud.

n: The fluid circulated through the drill string and up the annulus back to surface under normal drilling operations. Usually referred to as mud.

n: 1.A generic name widely used for a black, lustrous, carbonaceous resin classified as an asphaltite. Its proper name is uintaite, and it is found in Utah, USA. An important characteristic of gilsonite is its softening-point temperature. In oil-base muds, i

an asphaltic drilling fluid loss additive.

n: a drilling mud, e.g., oil-base mud and invert-emulsion mud, in which oil is the continuous phase. It is useful in drilling certain formations that may be difficult or costly to drill with water-base mud. Compare oil-emulsion mud.

n: 1.A mud in which the external phase is a product obtained from an oil, such as diesel oil or mineral oil. 2.More generally, a mud system that has any type of nonaqueous fluid as the external phase. This definition would include the newer variety of oil mu

n: a drilling or workover fluid in which oil is the continuous phase and which contains from less than 2 percent and up to 5 percent water. This water is spread out, or dispersed, in the oil as small droplets. See invert emulsion mud. oil mud.

n: see synthetic based mud.

n: calcium oxide, CaO, used in certain oil-base muds to neutralize the organic acid.

n: a drilling fluid containing man-made chemicals that emulate natural oil. Natural oil-base muds require that the cuttings made by the bit be specially handled to prevent damage to the environment;synthetic muds were therefore developed to replace oil-base muds in environmentally sensitive areas. For this reason, synthetic- based muds are sometimes termed pseudo-oil-base mud. See oil-base mud.

n: a drilling mud in which the continuous phase is water. In water-base muds, any additives are dispersed in the water. Compare oil-base mud.