About: http://webisa.webdatacommons.org/262260258

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 float sub 115 and the landing seat 145 are preferably made of drillable material such as aluminum or plastic, so that they may be drilled through after the casing string 140 is set within the wellbore 130.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es