F

Fault.: Geological term denoting a formation break across the trend of a subsurface strata. Faults can significantly affect the drilling fluid and casing programs due to possibilities for lost circulation, sloughing hole, or kicks.
Feed.: A mixture of solids and liquid (including dilution liquid) entering a liquid/solids separation device.
Feed capacity.: The maximum volume flow rate at which a solids-control device is designed to operate without detriment to separation efficiency. This capacity will be dependent on particle size, particle concentration, viscosity, and other variables of the feed. See: capacity, flow capacity, solids discharge capacity.
Feed chamber.: That part of a device that receives the mixture of diluents, drilling fluid, and solids to be separated.
Feed head.: The equivalent height, in feet or meters, of a column of fluid at the cyclone feed header.
Feed header.: A pipe, tube, or conduit to which two or more hydrocyclones have been connected and from which they receive their feed slurry.
Feed inlet.: The opening through which the feed fluid enters a solidsseparation device. Also known as feed opening.
Feed mud.: See: feed.
Feed opening.: See: feed inlet.
Feed pressure.: The actual gauge pressure measured as near as possible to, and upstream of, the feed inlet of a device.
Feed slurry.: See: feed.
Fermentation.: Decomposition process of certain substances, for example, starch, in which a chemical change is brought about by enzymes, bacteria, or other microorganisms. Often referred to...

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Drilling Fluids Processing Handbook

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