دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device used to connect long lines of pipe to allow the pipe joints to expand or contract as the temperature rises or falls.

n: the nipple tubular tools connected between the cementing pipe and left-handed ring joint and used to decrease the stress
ocurrs when breakout the cycling joint and be convenient for pulling out the cenment pipe


a device in a length of pipe that allows some pipe length expansion or contraction.

n: the increase in the temperature of the earth with increasing depth. It averages about 1�F per 60 feet (1�C per 18.3 metres),but may be considerably higher or lower.

n: 1.The rate of increase in temperature per unit depth in the Earth. Although the geothermal gradient varies from place to place, it averages 25 to 30 oC/km [15 oF/1000 ft]. 2.The natural increase of temperature with depth in the earth. Temperature gradient

the gradient reflecting the amount of temperature rise as the well depth increases. Normally about 1.1 to 1.8o F per 100 ft of true vertical depth increase.

n: a percentage multiplier of rated horsepower at which a motor may be operated without exceeding the temperature rise limit.

n: the maximum temperature increase that any part of the motor winding or magnetic structure accessible for measurement with a thermometer will have when the motor is developing its full load.