دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A kind of tannins containing phenol.

n: a kind of non-ionic surfactant,usually used as shale depressant or emulsifier

n: I. a dial gauge used on the rig to measure the hookload. 2. substances in acid-base titrations that, in solution, change colour or become colourless as the hydrogen ion concentration reaches a definite value, these values varying with the indicator. In other titrations. such as chloride, hardness, and other determinations, these substances change colour at the end of the reaction. Common indicators are phenolphthalein and potassium chromate.

abbr: the phenolphthalein alkalinity of the filtrate, reported as the number of millilitres of 0.02 Normal (N/50) acid required per millilitre of filtrate to reach the phenolphthalein end point. Pc is a measure of the alkalinity of the drilling mud. Usually, muds should have a high alkalinity (pH) to ensure adequate performance.

friction pressure – may be annulus or tubing.

n: C6H5OH, a white, crystalline, water-soluble, poisonous mass obtained from coal tar, or a hydroxyl derivative of benzene.

n: a kinds of surface active agent.

n pi: thermosetting plastic materials formed by the condensation of phenols (containing C6HsOH) with aldehydes (containing CHO) and used as protective coat- ings for oilfield structures.

n: see phenolphthalein filtrate alkalinity.

n: a kinds of non-ion surface active agent, mainly used as emulsifier of calcium treated emulsion drilling fluid.

n: anyone of several methods by which the loose, unconsolidated grains of a producing formation are made to adhere to prevent a well from producing sand but pemlit it to produce oil and gas.

one of various methods of consolidating the grains of an unconsolidated or weakly consolidated formation. Typically resin consolidation (epoxy, furan or phenol-formaldehyde),but may also include sodium silicate, coking, and mineral or metal precipitates.