دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: the conditions of temperature and pressure to which measured volumes are to be corrected.

n: a device calibrated to hold or deliver a known volume of liquid.

n: the gas produced from certain petroleum refinery operations (such as cracking or reforming). The composition of refinery gas varies in accordance with the process by which it is produced, but it consists essentially of the same paraffin hydrocarbons as natural gas plus olefins (propylene, ootylene, and ethylene) not found in natural gas.

n: in cases where a wave of energy encounters a surface, the ratio of the energy reflected from a surface to the energy that faUs on the surface. For example, iflight strikes a surface that has high reflectance, most of the light reflects from it;conversely, if the surface has low reflectance, very little of the light reflects from it.

n: in the distillation process, that part of the condensed overhead stream that is returned to the fractionating column as a source of cooling. v: in distillation extraction of fluids from a core, to use a solvent to flow over a core sample a second time to clean it.

n: a length of tubing or pipe bent to assume a coiled shape and through which a fluid cooler than the fluid outside the coil is circulated. The cooler fluid is used to cool the warmer fluid. Cooling causes vapors to condense to liquid.

n: a relative measurement of the volume of reflux in the distillation process. The ratio is commonly expressed as the quantity of reflux divided by the quantity of net overhead product.

n: deflection from a straight path undergone by a light ray or energy wave in passing from one medium to another in which the wave velocity is different, such as the bending of light rays when passing from air into water.

long wavelength component of field density variations that are usually deeper than general exploration interest.

n: the amount of a substance as indicated by the register on the meter.