About: http://webisa.webdatacommons.org/200950551

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 annulus 106 between the casing 104 and the wellbore 102 is typically filled with a fluid, such as a cement slurry, to strengthen the walls of the wellbore and facilitate isolation of certain areas of the wellbore.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com