1. n. [Drilling Fluids]
A polymer or copolymer of an alkalene oxide, such as polyethylene glycol (PEG), a polymer of ethylene oxide with general formula HO(CH2CH2O)nH, or polypropylene glycol (PPG), which is a polymer of propylene oxide. PAGs are effective shale inhibitors and have effectively replaced the earlier polyglycerols.
Synonyms: TAME, thermally activated mud emulsion
Alternate Form: PAG
See related terms: cloud point, inhibitor, polyol
