دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a vessel that heats an emulsion and removes water and gas from the oil to raise it to a quality acceptable for a pipe- line or other means of transport. A heater- treater is a combination of a heater, free- water knockout, and oil and gas separator.

n: flexible, insulated wire of known resistance, which can be wrapped around or strapped to a pipeline or valves for heating.

n pi: (marine) a system of piping in tank bottoms in which steam is carried as required to heat high pour-point liquid cargoes to pumpable viscosity level. heating medium n: a material, whether flowing or static, used to transport heat from a primary source such as combustion of fuel to another material. Heating oil and steam are examples of heating mediums. Also called heat medium.

n: the amount of heat developed by the complete combustion of a unit quantity of a material. Also called heat of combustion.

n: the vertical motion of a ship or a floating offshore drilling rig.

the vertical motion of a vessel.

n pi: 1. the parts of a hydrocarbon mixture that have the highest boiling point and the highest viscosity (such as fuel oils and waxes). 2. hexanes and heptanes in a natural gas stream.

n: oil composed mainly of heavy ends.

lower gravity, often higher viscosity oils. Normally less than 28o API gravity.

n: drill pipe that is like conventional drill pipe except that it is manufactured with a thicker wall, which increases its weight and tensile strength. For example. five-inch lEU grade E75 standardweight drill pipe weighs 19.5 pounds per foot (29 kilograms per metre). while five- inch lEU grade E75 heavyweight drill pipe weighs 25.ro pounds per foot (38.4 kilograms per metre). Heavyweight drill pipe is placed in the top of the string to support a very long string of pipe. Heavyweight drill pipe may be used in the drill stem when high-tensile strength drill pipe is required hit high-grade steel cannot be used because of the highgrade steels susceptibility to hydrogen embrittlernent, which is a form of corrosion caused by hydrogen sulphide. Compare heavy- walled drill pipe.

n: thick -walled drill pipe used in directional drilling and placed between the drill collar and drill pipe.

n: the vertical hight between the installation surface of drilling pump and the centre line of discharge port of the pump