دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

IADC-UBO term. Maximum projected surface pressures exceed UBO equipments operating pressure rating, but are below BOP stack rating. Catastrophic failure has immediate, serious consequences.

adj: of or relating to a condition in which pressure in the wellbore is less than the pressure in the fonnation.

perforating the well when the pressure in the wellbore is less than the pressure in the formation.

n: the amount by which the actual volume that has passed through the meter is less than the indicated volume registered by a meter. See absolute error.

n: the lower discharge stream in a cone-shaped centrifuge. It moves downward and leaves by way of the apex.

n: The process that bleeding solid phase grains through the apex of swirler.

n: The opening of blowing out the underflow of centrifugal separator.

n: a bit whose outside diameter is worn to the point at which it is smaller than it was when new. A hole drilled with an undergauge bit is said to be undergauge.

n: The bit that outerside diameter have been weard out of gauge or not meeting the fixed measure.

any part of a wellbore drilled with a worn bit.

n: an uncontrolled flow of gas, salt water, or other fluid out of the wellbore and into another formation that the wellbore has penetrated.

n: The phnomenon of high pressure layer fluid flowing in another uncovered breakup layer at downhole.

an uncontrolled and unintentional flow of fluids from one formation to another, generally when one or more well barriers have been breached.

n: (UlPC) a committee of state regulators, Environmental Protection Agency personnel, and industry representatives that works with the EPA in the formulation of new regulations.