دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: the usual units of volume for petroleum measurement are the cubic metre, litre, imperial gallon, US gallon, or the barrel (42 US gallons, or 159Iitres).

n: monovalent. See valence.

n: in an ideal gas, a number equal to the pressure of the gas times its molar volume divided by its temperature. See molar volume, mole.

n: see circulation valve. unloading a well n: removing fluid from the tubing in a well, often by means of a swab, to lower the bottomhole pressure in the wellbore at the perforations and induce the well to flow.

n: a special circulation valve that provides a way of equalizing tubing and annulus pressure. See also circulation valve.

generally a downhole valve that, when opened, permits circulation.

oil viscosity.

n: The velocity that drill fluid from bottom hole to well head.