دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: any distillation made in accordance with ASTM procedure. Generally refers to a distillation test to determine the initial boiling point, the temperature at which percentage fractionations of the sample are distilled, the final boiling point, and quantity of residue.

n: the vessel or tower in a gas plant in which fractionation occurs. See fractionate.

the process of separating natural gas into component parts or fractions such as propane, butane, ethane, etc.

n: (LPG) a mixture of heavier, gaseous, paraffinic hydrocarbons, principally butane and propane. These gases, easily liquefied at moderate pressure, may be transported as liquids and converted to gases on release of the pressure. Thus, liquefied petroleum gas is a portable source of thermal energy that finds wide application in areas where it is impractical to distribute natural gas. It is also used as a fuel for internal-combustion engines and has many industrial and domestic uses. Principal sources are natural and refinery gas, from which the liquefied petroleum gases are separated by fractionation.

n: separation of a hydrocarbon fluid mixture into components by fractionation, wherein the reflux condenser is operated at temperatures requiring refrigeration. See pod (Podbielniak) analysis.

n: in distillation, the product that condenses above the fractionation column.

n: a fractionation or absorption column filled with small objects that are designed to have a relatively large surface per unit volume (the packing),instead of bubble trays or other devices, to give the required contact between the rising vapours and the descending liquid.

n pl: a mixture of natural gas liquids prior to fractionation. Also called raw make.

n: condensate that has been stabilized to a definite vapor pressure in a fractionation system.

n: 1. a tool placed on a drill collar near the bit that is used, depending on where it is placed, either to maintain a particular hole angle or to change the angle by control- ling the location of the contact point between the hole and the collars. See packR:d-hole as- sembly. 2. a vessel in which hydrocarbon vapors are separated from liquids. 3. a fractionation system that reduces the vapor pressure so that the resulting liquid is less volatile.

n: A downhole tool which has minor interspace with borehole,usually be fixed on the drill string.