دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a force of attraction that causes molecules of one substance to cling to those of a different substance.

n: The force which holds together unlike molecules.

attractive forces between unlike molecules or compounds. Example – the attractive forces between water molecules and the walls of a clean glass tube are stronger than the cohesive forces;this leads to an upward turned contact or meniscus at the wall.

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: the rise and fall of liquids in small-diameter tubes or tubelike spaces, caused by the combined action of surface tension (cohesion) and wetting (adhesion). See capillary pressure.

a complex force governing some fluid movements, especially in smaller pores. Capillary action is the result of adhesion and surface tension forces. Adhesion (or attraction) by a fluid to the walls of a pore creates an attracting (or repelling) force, whic

n: a nonfermenting cellulose product used in drilling fluids to combat contamination from anhydrite (gypsum) and to lower the water loss of the mud.

n: A production manufactured by acetic acid chloride after plant fibre is alkalized. Usually used as filtrate reducer and adhesion promoter.

n: 1. any compound characterized by the presence of a reactive chemical structure that has an oxygen atom joined to each of two carbon atoms that are already bonded.2. any of various resins capable of forming tight cross-linked polymer structures characterized by toughness, strong adhesion, and high corrosion and chemical resistance. Epoxys are used extensively as coatings and adhesives.

a resin formed by reaction of polyols with epichlorohydrin.

adj: the result of the sticking or adhesion of two mating surfaces of metal. not protected by a film of lubricant. and tearing due to lateral displacement.

thread damage from lack of lubrication or mismatched metals.

n: a device used to separate and identify gas compounds by their adhesion to different layers of a filtering medium such as clay or paper, sometimes indicated by colour changes in the medium.

n: the CMC product with high degree of polymerization ,high molecular weight and viscosity ,mainly used as adhesion promoter