دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: the conditions (pressure, temperature, humidity, etc.) of the medium surrounding the case of a meter, instrument, transducer, etc.

n: a tightly banded scroll of special steel that vibrates when a magnetic field is applied to it. The vibration of the scroll sets off a transmitter, which is alternately switched on and off at 15 to 60 times per second. The transmitter causes compressional sound waves to travel through the formations surrounding the borehole. Each formation material will exhibit its own characteristic effect on the elastic wave propagation.

n: the electrical, mechanical, pneumatic, or other variable applied to the input of a device. It is the analog of the measured variable produced by a transducer.

n: the range of ambient temperatures, given by their extremes, within which a transducer is intended to operate.

n: The tool that fixed torque indicator ,which can screw on and off the nut ,bolt and pipe.

n: the relation of a prover or a transducer calibration, through a step-bystep process, to an instrument or group of instruments calibrated and certified by a national or international primary standard.

the ability to trace the components of a product through out the supply and manufacturing system from raw material to finished and installed product.

n: a device actuated by power from one system and supplying power to another system, usually in a different form. For example, a telephone receiver receives electric power and supplies acoustic power.

n: term used by Mobil Oil Corporation to identify gas volumes calculated by computers.

n: 1. a device, positioned in the drill stem between the bit and the drill collars, that absorbs impact loads and vibration from the up-and-down motion of the drill stem. Vibration dampeners are designed to transmit torque while absorbing reciprocative loads that decrease the efficiency of the drill bit. Also called a Shock Sub. 2. a device affixed to an engine crankshaft to minimize stresses that result from torsional vibration of the crankshaft. vibration error n: the maximum change in operating output, at any measured value within a specific range, when vibration levels of specified amplitude and range or frequencies are applied to the transducer along specified axes.

n: The tool can decrease the vertical and rotary shock vibration coming from bottomhole .