دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an opening at floor level in a side of a derrick or mast. The V -door is opposite the drawworks and is used as an entry to bring in drill pipe, casing, and other tools from the pipe rack. The name comes from the fact that on the old standard derrick, the shape of the opening was an inverted V.

n: The opening in front of the derrick,which make things convenient for lifting the drill string and casing.

an opening at floow level in the side of the rig to facilitate bringing in pipe.

n: see direct-indicating viscometer.

Fann viscosimeter.

n: on a dry air cleaner on an engine, a special valve that automatically opens to dump dust accumulated in the chambers of the air cleaner.

n: 1. a space that is theoretically devoid of all matter and that exerts zero pressure. 2. a condition that exists in a system when pressure is reduced below atmospheric pressure.

n: a device used to prevent a vacuum from occurring in a tank, vessel, piping, and so on.

n: a device in which gascut mud is degassed by the action of a vacuum inside a tank. The gas-cut mud is pulled into the tank, the gas removed, and the gas-free mud discharged back into the mud tank.

n: The equipment using through-going and low pressure of vacuum to degas.

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: 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.