دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a process for manufacturing components for 100-octane gasoline. An alkyl group is introduced into an organic compound either with or without a catalyst. Now usually used to mean alkylation of isobutane with propene, butenes, or hexenes in d1e presence of concentrated sulphuric acid or anhydrous hydrofluoric acid.

a reverse cracking process that convents hydrocarbon light ends (olefins) into longer chain, liquid fuels.

a sudden pressure drop that causes hydrocarbon light ends to go from a liquid to a gas.

n: the continuing process by which a liquid is caused to flash.

vaporization of water or light ends as pressure is released during production or processing.

n pi: the lighter hydrocarbon molecules that comprise gasoline, light kerosene, heptane, natural gas, and so forth.

hydrocarbon liquids with lower boiling points that may flash off when pressure is released.

light ends, usually C3 and C4 gasses liquefied for storage and transport.

n: loss from a cargo of oil. Usually the losses occur because the light ends escape during transport.

n: a primary cementing operation in which cement is pumped into the well in a series of operations or stages. stage separation n: an operation in which well fluids under pressure are separated into liquid and gaseous components by being passed consecutively through two or more separators. The operating pressure of each succeeding separator is lower than the one preceding it. Stage separation is an efficient process in that a high percentage of the light ends of the fluid are conserved.

n: Seperating the cementing work into two sections or multisections work.

n: (VRU) 1. in petroleum refining, a process unit consisting of a scrubber and a compressor. It is designed to recover petroleum from hydrocarbon vapors and safely to handle toxic gases produced from some wells. 2. in production operations, equipment designed to recover light ends that are released from oil in a stock or other tank.

a device that removes mists and vapors from gas in a tank or enclosure.

n pi: those hydrocarbons that are readily vaporized.