دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a secondary fault, often in a set, with opposite direction to the primary fault.

n: glass that has been treated with a heating and cooling process that toughens it and reduces its brittleness.

n: the date, usually one year from the effective date of the lease, by which rentals must be paid to maintain the lease in effect in the absence of drilling or production.

n: a gas measurement device that consists of a mutiple-ported Pitot tube installed inside a pipe through which gas is flowing;it is installed perpendicular to the flow of gas. The length of the annubar is equal to the diameter of the pipe in which it is installed. An annubar senses the difference between total flowing pressure and static pressure;gas volume is calculated from this difference. See Pitot tube.

a gas flow rate measurement device using Pitot tubes. Common in pipelines.

adj: pertaining to the annulus. The annulus is sometimes referred to as the annular space.

n: a large valve, usually installed above the ram preventers, that forms a seal in the annular space between the pipe and the wellbore or, if no pipe is present, in the wellbore itself. Compare ram blowout preventet:

n: See annular blowout preventer.

a device installed above or below the BOP that is capable of sealing around any device, and even on itself if the wellbore is empty.

n: The percentage of cutting in the annular space carried by drilling fluid.

using the annulus as the flow path.

n: The cross-section area of annular space between drill column and borehole wall.