دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: One of optimization method of drilling. Find the optimal drilling arrangement by changing bit load and keep rotate speed.

n: the speed reached by an engine or rotating system that corresponds to a resonant frequency of the engine or system. Often, in combination with power impulses, critical speed can cause damaging shock waves.

n: The rotary speed leading to cooscillation of drill pipe under any bit load.

n: weight placed on the bit that results in tension on the drill string, which causes the mill string to vibrate at tile rotary speed being used. A drill stem operating with critical weight and at the critical speed for that weight will have stresses develop that cause very rapid failure.

n: an instrument that records hook load, rate of penetration, rotary speed and torque, pump rate and pressure, mud flow, and so forth during drilling. drilling rig n: see rig.

n: the instrment used to record the drillng parameters during drilling such as the drill speed ,rotate speed ,drill pressure ,torque , fluid volume,pump pressure ,hook load and fluid ability and so on

n: the mechanical load that enforces on bit or the arithmetic product of bit pressure and rotary speed. Which is main factor to effect the drilling speed.

n: the speed, measured in revolutions per minute, at which the rotary table is operated.

n: The speed of rotary.

String RPM.

n: The exponent of speed in the drilling rate model,usually smaller than 1.