دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a derrick that is built piece by piece at the drilling location, as opposed to a jackknife mast, which is preassembled. Standard derricks have been replaced almost totally by jackknife masts. Compare mast.

n: The derrick that four legs extended to crown block and fixed with base in the mouth of a well.

n: the root mean Square (rms) deviation of the observed values from the average. standard dress n: diving equipment consisting of brass diving helmet, breastplate, heavy dry suit, weighted boots, weighted belt, hose, compressor, and communications.

n: A kind of filter paper used in filter experiment with filtration equipment.

n: a law, specific to each of several states, that defines the pressure and temperature bases under which a standard cubic foot of gas should be measured in the state.

n pi: (SIC) numerical codes assigned by the government to groups of industries with similar activities or operations.

n: in conventional electric logging, measures resistivity in the formation a long distance from the borehole. Used for deep investigation of the borehole.

n: the pressure exerted by a column of mercury 760 millimetres (29.9 inches) high;equivalent to 14.7 pounds per square inch absolute. Compare base pressure.

n: The solution that have known accurate concentration,for example ,molar concentration ,equivalent concentration and titrimetric degree.

n: the measuring tape used to measure the circumference of the ring at the bottom of a tank. It is calibrated by the National Institute of Standards and Technology and is usually 100 feet (30.5 metres) long.

n: a pre-determined temperature used as a basic measurement. The petroleum industry uses 60�F (15.5�C) as its standard temperature during measurement of oil. The volume of a quantity of oil at its actual temperature (assuming it is not 60�F) is converted to the volume the oil would occupy at 60�F. Conversion can be aided by the use of API conversion tables. standing

n: A unified regulated temperature value for measuring physical property,because many substances have different physical property at different temperature.