دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see air cleaner filter element.

n: on an engine, a device that contains an air filter element that does not depend on oil to effectively filter the air entering the engine. Instead, the filter element has a number of folds and chambers that bap dust and dirt going into the engines air intake. Some dry elements may be cleaned and reinstalled;others are discarded and replaced. Compare wet air cleane1:

n: see air cleaner filter element.

n: heavy-duty paper perforated with several very small holes (pores). Folded in accordion pleats, micropore paper often serves as a secondary filter element in an engines fuel system. Fuel passes through the pores, while the unperforated part of the paper stops dirt. microresistivity log n: a resistivity logging tool consisting of a spring device and a pad. While the spring device holds the pad firmly against the borehole sidewall, electrodes in the pad measure resistivities in mud cake and nearby formation rock. See resistivity well logging.