About: http://webisa.webdatacommons.org/317710252

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Clayey materials such as bentonite, attapulgite, sepiolite or other material commonly used in drilling fluids can be included in the present invention to provide drilling muds to lubricate the drill strings and suspend drill cuttings.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com