دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a meter accessory that enables a meter that is measuring volume at stress temperature to register the equivalent volume at a reference or base temperature.

n: an accessory for a meter that is used with an automatic temperature compensator. It is used to regulate the magnitude of temperature compensation consistent with the coefficient of expansion of the liquid being metered.

n: a type of engine governor that prevents hunting (an engines speeding up and slowing down as it seeks to run at the speed dictated by the engine governor.) A compensator on the governor anticipates the engines return to its set speed. When an engines speed goes faster than the set speed, the compensator drops the engines rpm;when engine speed drops below set speed, the compensator increases the engines rpm. Normally, engine operators set the compensator to keep the drop small. With a small speed drop, the governor and compensator quickly make the engine go back to control speed. See govemo1;hunting.

n: See compensate system of lubricant.

n: a double index scale against which a fixed reference pointer may be moved to correct for variations in gravity from a base point computed for water at 60�F. The compensator is marked in both specific gravity and API gravity units.

n: a device that moves with the heave of a floating offshore drilling rig to prevent the bit from being lifted off the bottom of the hole and then dropped back down (i.e., to maintain constant weight on the bit). It is used with devices such as bumper subs. See motion compensator.

n: a hydraulic or pneumatic device usually installed between the travelling block and hook.its function is to keep a more constant weight on the drillbit when drilling from a floating vessel.as the rig heaves up and down,a piston moves within the device to c

n: any device (such as a bumper sub or heave compensator) that serves to maintain constant weight on the bit in spite of vertical motion of a floating offshore drilling rig.