دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The component of a survey instrument used to measure inclination.

n: the part of a groove on the drawworks drum that changes direction. Grooves run parallel to each other, except in the angle-control section, where each groove is machined at a slight angle. This angled part of the groove causes the wire rope being spooled onto the drum to change direction so that the next wrap of rope on the drum lies in between the wraps of rope already on the drum. Also called a crossover section.

n: a type of thermometer used on oil tanks. The graduated part of the thermometer is angled at least 90ﾰ from the temperature-sensitive portion. The angle conforms to the shell of the tank and permits easy reading of the instrument.

n: a glass-stem thermometer in which the tail is bent at an angle to the stem so that the tail can be mounted in a horizontally disposed thermowell, leaving the scale vertical for greater ease of reading.

Alaska Natural Gas Transportation System.

n: one type of misalignment in a chain-and-sprocket drive. The shafts are not parallel to each other (they form an angle) in either the horizontal or the vertical plane. This pulls the link plates on one side tighter than those on the other side;thus, one side of the chain and sprockets wears faster than the other. Link plates on only one side of the chain break because of fatigue.

n: an unconformity in which formations above and below are not parallel. See unconformity.

An unconformity in which the beds below the unconformity dip at different angles than the beds above it.

n: a measure of the time required for a flowing medium. such as a fluid. to change its angular displacement.

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.

n: liquid chemical derived from benzene or from benzene and ammonia. It is used as a solvent and in the organic synthesis of other substances.

n: C6H7N, colourless and oil like liquid, tang and toxic. Usually used in measuring content of aromatic hydrocarbon in drilling fluid operation.