دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

monoethylene glycol. A hydrate inhibitor.

n: one million pascals.

n: the metric unit of service given by a hoisting line in moving 1,000 newtons of load over a distance of 1,000 metres.

n: an instrument for measuring large amounts of resistance in a circuit or insulation. Its name comes from Mega Ohmmeter, a proprietary trade name.

abbr: megajoule. m1 abbr: millilitre.

megajoule. 1,000,000 joules.

abbr: megapascal.

Megapascals, 1 million Pascals.

n: a pin that forms a flexible link between the piston and the connecting rod. This bearing area has the highest load per square inch (square millimetre) of any in an engine, perhaps as high as 50,000 pounds per square inch (345 megapascals). Also called a wrist pin.

n: a measure of the amount of pressure in pounds per square inch that a column of fluid (such as drilling mud) exerts on the bottom of the column for every foot of its length. For ex- ample, 10 pounds per gallon mud exerts 0.52 pounds per square inch per foot (11.8 kilopascals per metre),so a column of 10 pounds per gallon (1,198.2 kilograms per cubic metre) mud that is 1,000 feet (304.8 metres) long exerts 520 pounds per square inch (3.6 megapascals) at the bottom of the column. See pressure gradient.

n: a coring process in which nitrogen is used to maintain a pressure of 5,000 to 7,000 pounds per square inch (34.5 to 48.3 megapascals) on the core as it is retrieved from the borehole. Pressure coring is used to minimize the escape of fluid from the core during recovery and to prevent mud invasion and flushing.

n: sww core drilling with keeping formation pressure.

n: a cracking process in which low-octane naphthas or gasolines are converted into high-octane products. Thermal reforming is carried out at high temperatures and pressures (932.-1,040.F, 500.- 560�C, 250 to i,OOO pounds per square inch-i.7 megapascals). Catalytic reforming is carried out at lower temperatures (850.-950.F, 454 .-510.C) and much lower pressures. Reforming is usually a once- through process.