About: http://webisa.webdatacommons.org/229806862

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	The well is then drilled below the protective casing string to the bottom of the hydrocarbonbearing formation using a suitable circulating fluid such as oil, gas, air or foam.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com