<http://webisa.webdatacommons.org/prov/149474565>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/154695262> .
<http://webisa.webdatacommons.org/154695262>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/154695262>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/154695262>	<http://www.w3.org/ns/prov#value>	"This method has both cost and safety implications, i.e. the casing operation has to be halted while the water bushing is fitted to the top drive and casing string." .