دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see starting torque. break circulation v: to start the mud pump for restoring circulation of the mud column. Because the stagnant drilling fluid has thickened or gelled during the period of no circulation, high pump pressure is usually required to break circulation.

n: The voltage when emulsion begins to demulsify under the certain condition. A target used to measure stability of emulsion.

v: to move with a slight, irregular rhythm. Breathing occurs in tanks of vessels when vapours are expelled and air is taken in. For example, a tank of crude oil expands because of the rise in temperature during the day and contracts as it cools at night, expelling vapours as it expands and taking in air as it contracts. Tubing breathes when it moves up and down in sequence with a sucker rod pump.

n: a small vent in an otherwise airtight enclosure for maintaining equality of pressure inside and outside.