دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: one of the alkali metal elements with a valence of 1 and an atomic weight of about 39. Potassium compounds, most commonly potassium hydroxide (KOH),are sometimes added to drilling fluids to impart special properties, usually inhibition.

n: An element with an atomic number of 19. The 40K isotope is radioactive, decaying with the emission of a single gamma ray of 1.46 MeV with a half-life of 1.3 * 109 years to give a stable isotope of argon. Potassium is the largest source of natural radioact

n: energy possessed by a body because of its position or configuration. A wound spring or a raised weight has potential energy.

n: a natural or artificial siliceous material commonly added to portland cement mixtures to impart certain desirable properties. Added to oilwell cements, pozzolans reduce slurry weight and viscosity, increase resistance to sulfate attack, and influence factors such as pumping time, ultimate strength, and watertightness.

n: A siliceous or siliceous and aluminous material that possesses little or no cementitious value. In a finely divided form and in the presence of moisture, however, pozzolan reacts chemically with calcium hydroxide to form compounds possessing cementitious

n: 1. a joining device, such as a Squnch joint, in which the force of weight is used to make the connection. 2. a pipe or line coupling that is capable of maintaining a tight, leak-free connection under high pressures.

n: an instrument that measures fluid pressure and usually registers the difference between atmospheric pressure and the pressure of the fluid by indicating the effect of such pressures on a measuring element (e.g., a column of liquid, pressure in a Bourdon tube, a weighted piston, or a diaphragm).

n: the apparatus that measure the pressyre of fluid.

a cup and bar with a sliding weight, similar to a Mud Balance, but also having a screw on top with a slide valve through which a small amount of fluid could be added under pressure, collapsing the air dispersed in the fluid. Better accuracy than an unpres

the probabilistic (risk weighted) approach of estimating recognizes that, in the real world, there are uncertainties associated with each project component. As such, for each component, there exists probabilities of occurrence within a range of possible v

n: 1. a vessel of known size, often equipped with a thermometer, used to determine or to compare densities of solids or liquids. 2. in core analysis, the cylindrical steel chamber filled with mercury used to measure the bulk volume of a core sample. When a core sample is placed in the pycnometer, the mercury that it displaces spills into a dish and is weighed. By dividing the weight of the displaced mercury by the density of the mercury, the bulk volume of the sample can be determined.

n: the ratio of the density of a gas, under the observed conditions of temperature and pressure, to the density of dry air at the same temperature and pressure. The ideal gas specific gravity is the ratio of the molecular weight of the gaseous mixture to the molecular weight of air.

n: cost of crude oil to the refmer, including transportation and fees. The composite cost is the weighted average of domestic and imported crude oil costs.