دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a highly porous solid, usually a charcoal. Used for adsorption of unwanted materials.

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

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: diving in which a diver uses a normal atmospheric mixture of oxygen and nitrogen as a breathing medium. It is limited to depths less than 190 feet (58 metres) because of the dangers of nitrogen narcosis;however, dives with bottom times of 30 minutes or less may be conducted to a maximum of 220 feet (67 metres).

n: The drilling fluid filtrate reducer of amylum derivant that amylum reacts with alkyl sulfate in the alcaline condition.

n: organisation that sets guidelines for the testing and use of equipment and materials. Its publications are ASTM Standardisation News, Book of Standards, Cement and Concrete Aggregates Journal, Composites Technology & Research, Geo technical Testing Journal, Journal of Forensic Science, and Journal of Testing and Evaluation. Address: 100 Barr Harbor;West Conshohocken, PA 19428;(610) 832-9500.

n: rock layers folded in the shape of an arch. Anticlines sometimes trap oil and gas. Compare syncline.

n: A configuration of folded and stratified rock layers in the shape of an arch. Often associated with a trap.

a convex-upward formation of rock layers (a fold with the strata sloping down on the sides from a common crest. In association with a sealing rock, an anticline may form a trap for hydrocarbons. Anticlines may be faulted or unfaulted. The majority of the

abbr: Arctic National Wildlife Refuge.

abbr: circulated;used in drilling reports. circle wrench n: see wheel-type back-off wrench.