دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an instrument used on gas or gasoline engines to indicate the performance characteristics and load.

n: a device that measures the saturation, or the amount, of each fluid in a core sample by distilling the fluid from the core with heat at pressure below atmospheric. The vacuum retort is used to measure saturation on whole core samples.

n: the tendency of elements to form compounds through a shift of electronic structure.

n: an effect that causes emulsions and colloids to separate;it is particularly prevalent in emulsions and colloids that contain a large number of highvalence ions. See also valence.

n: the number of electrons of an element involved in forming a compound.

n: see thalweg.

n: a device used to control the rate of flow in a line to open or shut off a line completely, or to serve as an automatic or semi-automatic safety device. Those used extensively include the check valve, gate valve, globe valve, needle valve, plug valve, and pressure relief valve.

any of several valves: plug, gate, butterfly, needle, etc., used in oil field operations.

n: in a two-diaphragm, fourchamber diaphragm displacement meter, the linkage that uses the motion from the crank to slide D-shaped valves over the three ported seats to fill and empty the four measurement chambers alternately.