About: http://webisa.webdatacommons.org/417708772

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	In some embodiments, the annulus may be the annular space between the well bore wall and a pipe string, e.g. a casing, disposed in the well bore.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com