CEC 1
CEC 1 :
(n.) Drilling Fluids. Quantity of positively charged ions (cations) that a clay mineral (or similar material) can accommodate on its negative charged surface, expressed as milliequivalents per 100 grams. CEC of solids in drilling muds is measured on a whole mud sample by a methylene blue capacity (MBC) test, which is typically performed to specifications established by API. CEC for a mud sample is reported as MBC, methylene blue test (MBT) or bentonite equivalent, lbm/bbl or kg/m3. Syn: Base Exchange. Alt. form: Cation-Exchange Capacity
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