About: http://webisa.webdatacommons.org/51330475

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	When field developments encounter bitumen, problems arise such as spike in torque, increase of mud pressure, adhesion to BHA and closure of hole.
http://www.w3.org/ns/prov#wasQuotedFrom	worldoil.com