دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: CH2=CHCN, a kind of organic compound, colourless and fluxionary liquid. The vapor is toxic. It is the important material for coagulant of drilling fluid.

n: a form of carbon characterised by a high absorptive and adsorptive capacity for gases, vapours, aIM1 colloidal solids.

n: the expansion of a gas, vapour, or liquid stream from a higher pressure to a lower pressure with no change in enthalpy of the stream.

n: the adhesion of a thin film of a gas or liquid to the surface of a solid. Liquid hydrocarbons are recovered from natural gas by passing the gas through activated charcoal, silica gel, or other solids, which extract the heavier hydrocarbons. Steam treatment of the solid removes the adsorbed hydrocarbons, which are then collected and re-condensed. The adsorption process is also used to remove water vapour from air or natural gas. Compare absorption.

n: A surface phenomenon exhibited by a solid (adsorbent) to hold or concentrate gases, liquids or dissolved substances(adsorptive) upon its surface, due to adhesion.

the attraction and holding of a layer of a chemical on the wall of a formation. Usually held by ionic charge or wetting preference.

n: a device used to separate and remove gases from a liquid to be measured to prevent an error in liquid measurement.

n: the common name for anhydrous calcium sulphate. caSﾰ4.

n: The main component is calcium sulphate which has no crystal water. The formation which contains this gypse is very usual in drilling and it can contaminate the fresh water drilling fluid. This formation swells when the drilling fluid go through it and som

CaSO4 formation. Usually formed as an evaporite from a drying lake of trapped sea water.

abbr: after payout;commonly used in the land department of an oil company.

n: the temperature at which the vapour pressure of a liquid becomes equal to the pressure exerted on the liquid by the surrounding atmosphere. The boiling point of water is 212ﾰF or 100ﾰC at atmospheric pressure (14.7 pounds per square inch gauge or 101.325 kilopascals).

the temperature at which the vapor pressure of the liquid is equal to the pressure exerted on it by the surrounding atmosphere.

n pi: 1. the liquids and the residue that collect in the bottom of a vessel (such as tank bottoms) or that remain in the bottom of a storage tank after a period of service.2. the residual fractions remaining at the bottom of a fractionating tower after lighter components have been distilled off as vapours.

v: to move with a slight, irregular rhythm. Breathing occurs in tanks of vessels when vapours are expelled and air is taken in. For example, a tank of crude oil expands because of the rise in temperature during the day and contracts as it cools at night, expelling vapours as it expands and taking in air as it contracts. Tubing breathes when it moves up and down in sequence with a sucker rod pump.