دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: viscosity as measured by the Marsh funnel, based on the number of seconds it takes for 61 cubic inches (1,000 cubic centimetres) of drilling fluid to flow through the funnel.

n: Time, in seconds for one quart of mud to flow through a Marsh funnel. This is not a true viscosity, but serves as a qualitative measure of how thick the mud sample is. The funnel viscosity is useful only for relative comparisons.

a viscosity measurement based on the number of seconds that it takes for 1 liter of fluid to flow through a Marsh funnel.

a pressure relief valve that opens when temperatures increases sufficiently to melt an activation linkage.

flapper valve.

Formation Volume Factor.

n, v: variation of gauge. Until recently the API preferred gage" to "gauge."

n: a unit of measure of liquid capacity that equals 3.785 litres and has a volume of 231 cubic inches (0.00379 cubic metres). A gallon of water weighs 8.34 pounds (3.8 kilograms) at OOF (16"C). The imperial gallon. formerly used in Great Britain. equals approximately 1.2 US gallons.

n: a permanent magnet meter for detecting weak electric current. It can be adapted with shunts or resistors to measure larger currents or voltage.

a sensitive ammeter

Uses a scintillation crystal and a photomultiplier tube to measure naturally occurring and artificially induced gamma-ray radiation. The gamma-ray radiation is a signature of the formations in a well – very useful in depth control. Used in open hole or pi