PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In any event, after injecting a cement slurry and the hardening of the cement, any cement left in the pipe as well as the destructible cementing equipment such as the casing shoe, float collar and landing collars are subsequently reamed or drilled out to complete the well or to project or deepen the borehole below the lower cemented end of the pipe.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com