Baroid Industrial Drilling Products offers Aqua-Clear PFD, a phosphate-free dispersant. Intended for use in water well development and rehabilitation to disperse mud, sediment and bentonite clay, it is available as a concentrated liquid polymer. ANSI/NSF Standard 60 certified, Aqua-Clear produces no harmful vapors and is safe to use on all plastics, rubber and metals. The product is said to increase well productivity and reduce development time and pumping costs. Baroid Industrial Drilling Products.