دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a hole drilled into the space between rings of packing material used with a liner in a mud pump. When the liner packing fails, fluid spurts out of the telltale hole with each stroke of the piston, indicating that the packing should be renewed.

n: The hole between capping gland nut and packing washer of drag link of drill pump.

natural earth currents originating as result of variations in the earth’s magnetic currents.

n: The shear stress measured at low shear rate after a mud has set quiescently for a period of time ( 10 minutes in the standard API procedure, although measurements after 30 minutes or 16 hours may also be made).

n: neutron having an average energy level at room temperature of 0.025 electron volts.

n pI: plastics that solidify when first heated under pressure, but whose original characteristics are destroyed when remelted or remolded.

n: the amount of time required for cement to reach an APIestablished degree of consistency, or thickness. Thickening time begins when the slurry is mixed. thief n: a device that is lowered into a tank to take an oil sample at any depth. The sample will subsequently be used to deter- mine the quality and S&W content of the oil in the tank. v: to obtain a sample of oil from a tank using a thief.

n: The ultimate time that viscosity of cement slurry coming to 10Pa.s


the time that a cement slurry will remain pumpable at temperature and pressure.

n: The cake that its thickness smaller than 1mm.

n: the axis of string cannt coincide and thread cannt be screwed on at normal order.