دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a point located somewhere on a line drawn vertically through the centre of buoyancy of the hull of a floating vessel with the hull in one position (e:g., level) and then another (e.g., inclined). When the hull inclines to a new position, the centre of buoyancy of the hull also moves to a new position. If a second line is drawn vertically through the new centre of buoyancy, it intersects the first line at a point called the metacenter. Location of the metacenter is important because it affects the stability of floating vessels (such as mobile offshore drilling rigs).

n: in an engine, a fuel filter that consists of several very thin metal discs stacked inside a housing. As fuel flows through the strainer, foreign matter in the fuel is trapped by the very small spaces between the discs.

n: a device used to measure and often record volumes, quantities, or flow rates of gases, liquids, or electric currents. v: to measure quantities or properties of a substance.

n: a device to enable the adjusting of a meter register to indicate true volume within acceptable tolerance.

n: a counting device. electrical or mechanical. coupled to the measuring element to register the indicated volume that has passed through the meter.

n: difference in a volume determined from separate meters measuring the same gas stream. occasioned by the fact that gas volumes in field operations are not precisely determinable.

n: a number used to correct a meters inaccuracy. The factor is derived by dividing the actual volume of liquid passed through a meter during proving by the volume registered by the meter. For subsequent metering operations, the actual throughput, or gross measured volume, is determined by multiplying the indicated volume registered on the meter by the meter factor.

a correction factor applied to a meter to increase measurement accuracy in a range.

n: a general expression for the relationship between the volume registered by a meter and the actual volume that has passed through it. May refer to meter error. meter factor. meter accuracy. and so on.

n: the multiple passes or round trips of the displacer in a prover for purposes of determining a meter factor. v: to establish the meter factor by comparing meter through-put to a prover of known volume.

n: a device used to determine the accuracy of a meter. Two popular types are pipe provers and open tank provers. A pipe prover has a calibrated pipe that contains a known volume. A sphere displaces oil or liquid product through the pipe while the meter being proved registers the amount of oil or liquid displaced. The meters reading is then compared to the known volume in the pipe. An open tank prover is a calibrated tank that contains a known volume. Oil or liquid product is put into the tank while the meter being proved registers the amount. The meters reading is then compared to the known volume in the tank.