1. n. [Drilling Fluids]

A clay that has been treated during manufacturing to enhance its dispersion.

Reference: Garrett RL: "Quality Requirements for Industrial Minerals Used in Drilling Fluids," Mining Engineering 39, no. 11 (November 1987): 1011-1016.

Synonyms: polyacrylate

See related terms: API,  beneficiation,  bentonite,  cation exchange capacity,  clay extender,  clay-water interaction,  colloid,  hardness ion,  make-up water,  OCMA,  peptize,  peptizing agent