دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a tropical cyclonic system with wind speeds from 35 to 64 knots.

n pi: disturbances on the intertropical convergence zone that travel from east to west. Low-pressure areas travel in tropical waves.

n: 1. in meteorology, a zone or belt of relatively low pressure. 2. in oceanography, the lowest point of the water surface level between crests.

n: The presure of bit applied by drill string substract the upward presure caused by drill fluid

n: the direction of the north geographic pole-as opposed to the north magnetic pole, which is several hundred miles away, toward Hudson Bay.

n: effective power. See apparentpower.

n: the theoretically correct amount. In practice, it is represented by the standard being used for comparison, such as a prover.

n: pressure measured relative to zero pressure. true vertical (TVD) n: the depth of a well measured from the surface straight down to the bottom of the well. The true vertical depth of a well may be quite different from its actual measured depth, because wells are very seldom drilled exactly vertical.

the vertical depth from the surface to the depth of interest. Used for formation comparison and calculation of hydraulic pressures.