Methylene Blue Test
Methylene Blue Test :
(n.) Drilling Fluids. A test to determine the amount of clay-like materials in a water-base drilling fluid based on the amount of methylene blue dyeabsorbed by the sample. Results are reported as "MBT" and also as "lbm/bbl, bentonite equivalent" when performed to API specifications. Syn: bentonite equivalent, MBT test. See: Cation-Exchange Capacity, Endpoint, Ion Exchange, Kaolinite, Low-Yield Clay, Titration, Water-Base Mud
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