About: http://webisa.webdatacommons.org/203015417

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	For a more detailed description of underbalanced drilling and the problems, especially problems with the resulting multiphase mixture, encountered when drilling underbalanced, refer to U.S. patent application Ser.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com