Hexane extractable material in water-based and oil-based drilling fluid wastes collected from sites in Oklahoma, North Dakota, and Wyoming in 2021
Wells drilled during oil and gas exploration use drilling fluids to cool and lubricate the drilling bit and clear the borehole of cuttings.  These fluids are recycled during the drilling process, but eventually can no longer be used.  This is an important waste stream from petroleum generation that requires disposal. …