دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: on an engine, very thin metal plates that are attached to the radiators tubes. Because there are hundreds of these plates in contact with the surrounding air, they efficiently radiate heat from the coolant circulating through the tubes.

n: a radioactive material (often carnotite) put into a well to allow observation of fluid or gas movements by means of a tracer survey.

n: a kind of radioactive substance added into the cement slurry or well ,used as detection sign during tracer survey.

a very low strength radioactive isotope used to tag water or other fluid for tracing the path of fluid in the reservoir or in a well.

n: an element, or one of its variants, that exhibits radioactivity.

an unstable isotope of an element that decays spontaneously, emitting radiation.

R226, one of the natural isotopes that as a trace element may incorporate into the matrix of naturally forming barium or strontium sulfate scale and make it a very low level radioactive material (NORM scale).

n: a device that varies a frequency at a constant rate and incorporates an oscillator that can be programmed to provide an output over a specified frequency range.

n: an error that varies in an unpredictable manner in absolute value and in algebraic sign when a large number of measurements of the same value of a quantity are made under effectively identical conditions.

n: 1. the name given to the east-west lines of the rectangular survey system. Compare township. 2. in oceanography, the difference in height between consecutive high and low tides. 3. the region between the limits within which a quantity is measured, received, or transmitted, expressed by stating the lower and upper range values.

n: the interval within which the true value is expected to lie with a stated degree of confidence.

a skin value that increases with flow rate. Generally recognized as a turbulence induced skin.

n: the changed value of deviation angle in unit length of the wellbore