دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: See API filtration.

n: The method that can measure drilling fluid filtration regulated by API. Refered to the filtrated volume of drilling fluid in the condition of routine pressure of 690kpa(+ or -35kpa),filter area of 4580mm2(+ or - 60mm2) and 30min.

n pl: a large, widely distributed group of typically one-celled microorganisms. See anaerobic bacteria, sulfate reducing bacteria.

n: Refers to the microbe that makes drilling fluid decrease filtration rate and viscosity due to it can destroy amylum additive.

a build-up of particles on the upstream side of a filter that improves the filter’s ability to remove particles from fluid (will also raise the differential pressure across the filter).

a conditional ratio requirement on a filtering system that compares the number of particles of a certain size in the unfiltered and filtered fluid. A beta rating of 1000 at 5 microns means that there is one particle of 5 micron or greater size in the filt

n: see filter cake.

n: A tier of penetrant medium adhering to the borehole face in the filtration process of solid phase of drill fluid.

filter or mud cake, stranded by dehydration on the face of a permeable formation by fluid loss.

n: the thickness of drilling mud filter cake.

n: The measurement of the thickness of the filter cake deposited by a drilling fluid against a porous medium, most often following the standard API filtration test. Cake thickness is usually reported in 32nd of an inch.

n: The filtration of casing due to fracture or defective tightness of thread.

n: Mined lignite, usually leonardite, to which chromate has been added and/or reacted. The lignite can also be causticized with either sodium or potassium hydroxide. The chrome lignite is used for rheology stabilization and filtration control of the drilling

diatomaceous earth filtration unit.