25 July 2017

Circulating fluid – drilling fluid, mud

A fluid consisting of water, oil, or other liquid and containing clay, weighting materials, and/or chemicals, which is circulated through the drill pipe and wellbore during […]
18 July 2017

Circulation

The movement of drilling fluid out of the mud pits, down the drill stem, up the annulus, and back to the mud pits.
10 November 2021

Classification, Labeling, and Packaging (CLP)

EU regulation on classification, labeling and packaging (CLP) of substances and mixtures (EC No 1272/2008) entered into force in 2009. Its purpose is to ensure a […]
18 July 2017

CMC

Sodium carboxymethylcellulose. A nonfermenting cellulose product used in drilling fluids to combat contamination from anhydrite (gyp) and lower the water loss from the drilling fluid to […]