دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the action of fluids flowing in a U-tube (as heavy mud forcing lighter mud down the drill stem and up the annulus).

underbalance operations.

unconfined compressive strength, a measure of the formation strength form compressive tests on core.

abbr: Underground Injection Practices Council.

n: the amount by which a tank or a vessel is short of being full, especially on ships. Ullage in a tank is necessary to allow space for the expansion of the oil in the tank when the temperature increases. Also called outage.

n: the opening in the top of a tanker or barge tank compartment through which ullage measurements and sampling operations are carried out.

n: a paste that is applied to an ullage rule or dip tape and weight to indicate precisely the level at which the liquid meniscus cuts the graduated portion.

n: a point marked on the ullage hatch or on an attachment suitably located above or below the ullage hatch and situated at a distance above the bottom of a container greater than the maximum liquid depth in the container. Ullage measurements are taken from this reference point.

n: a graduated rule attached to a dip tape to facilitate the measurement of ullage.

n: see outage tape-and-bob procedure.