دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

annular velocity.

apparent viscosity.

n: The vertical heigh from the top of girder of drill floor to the bottom surface of crownblock beam.

n: The vertical heigh from the drill floor to the floor of monkey board.

n: the average of all the instantaneous values of current or voltage in one-half a cycle of AC electricity;equal to 0.636 times the maximum value.

annulus wing valve.

n: a velocitymeasuring device in which gas flow is parallel to the rotor axis and the speed of rotation is proportional to the rate of flow.

n: The longitudinal vibration of drilling stem due to bit rotary motion.

n: 1. in directional drilling, the direction of the wellbore or of the face of a deflection tool in degrees (0-359") clockwise from true north. 2. an arc of the horizon measured between a fixed point (such as true north) and the vertical circle passing through the centre of an object.

n: Reflecting the direction of wellbore deflection.

n: voltage induced in the armature of a motor by the magnetic field in which it is turning. Also called counter emf. See electromotive force.