دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The abnormal pressure per meter in depth, usually express as MPa/m. It is the reference
of density of the mud and the procedure of the casing design.

n: the density of a solid or liquid substance at a specified temperature. Sometimes referred to as true density or density in vacuo. See density.

n: the value obtained when the absolute dynamic viscosity is divided by the density (expressed in grams per cubic centimetre) of the liquid at the temperature concerned.

n: the property by which a fluid in motion offers resistance to shear and flow. Usually expressed as newton seconds/metre.

the measure of a fluid’s ability to resist flow without regards to its density. It is defined as a fluid’s kinematic viscosity multiplied by its density.

the velocity of an imposed sound wave (acoustic velocity) through a rock times the density of the rock.

n: the injection of air or gas into a liquid. In the oil industry a common form of aeration is the injection of natural gas into reservoir liquids standing in a well. Aeration with natural gas reduces the density of the liquids and allows declining reservoir pressure to lift the liquids. See gas lift.

n: The technique of injecting air or gas in varying amounts into a drilling fluid for the purpose of reducing hydrostatic head. See also Air Cutting.

intoduction of air.

Standard density of dry air, free of CO2 at 0oC is 1.292 g/L.

0.763 lb/ft3 at standard temperature and pressure.

n: the measure of the density or gravity of liquid petroleum products in the United States;derived from relative density in accordance with the following equation: API gravity at 60ﾰF = [141.5 + relative density 60/60ﾰF] -131.5 API gravity is expressed in degrees, 1 D. API being equivalent to 1.0, the specific gravity of water. See gravity.

n: A measure of the density of liquid petroleum products, expressed in degrees. It can be derived from the following equation: API gravity (degree) =141.5/specific gravity-131.5

the relative density of a hydrocarbon based on a scale of degrees API. Density in g/cc = (141 / (131 +API)).

n: Mixed iron ore and barite to reach the density of 4.20 and coincide with API criterion.