دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the measure of hydraulic power expended through the bit nozzles for cleaning the bit cutters and the hole bottom.

n: see nozzle.

n: A kind of center blower whose entry diameter is smaller than its exit diameter so that the velocity energy can be changed into force energy .

n: refer to diffuser bit nozzle

n: the extended pipe on the bit nozzle,usually made form hard metal and being wearproof

n: a special bit nozzle, often used on large bits, that lengthens the nozzle and therefore places the jet of drilling fluid exiting the nozzle close to the bottom of the hole. With large bits, where regular nozzles can be relatively distant from the bottom of the hole, the cleaning power of the jet of drilling fluid may be lost because the velocity, or speed, of the jet diminishes rapidly after it exits the nozzle. By extending the length of the nozzles, the jets are placed closer to bottom for maximum cleaning.

n: the spray head which is longer than ordinary spray head

n: Velocity, e.g. of flow from the bit nozzles.

n: 1.A measure of the energy per unit of time that is being expended across the bit nozzles. It is commonly calculated with the equation HHP=P*Q/1714, where P stands for pressure in pounds per square in., Q stands for flow rate in gallons per minute, and 171

n: The exit velocity of the drilling fluid after it accelerates through bit nozzles.

n: the exit viscosity of the drilling fluid after it accelerates through bit nozzles in high pressure drilling.