Capillary Tube Viscometer
Capillary Tube Viscometer :
(n.) Drilling Fluids. An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter. The viscosity of base oils for oil muds, which are Newtonian fluids, is measured using a glass capillary tube in a thermostatic bath, when performed according to API procedures. See: Newtonian fluid, oil mud, rheology
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