1. n. [Drilling Fluids]

A mud that contains no commercial weighting material. Native-solids muds are unweighted muds, containing no barite. More solids-control techniques are available for unweighted muds than for weighted muds. In fact, dilution of unweighted muds is highly economical.

Synonyms: native-solids mud

Antonyms: weighted mud

See related terms: hematite,  native clay,  weighting material