PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • SUMMARY OF THE INVENTION Generally, this invention provides improved perforating apparatus including a carrier arranged to be moved through the well bore; a plurality of shaped charges carried by the carrier, each charge being oriented in a direction whereby the detonation thereof forms an explosive jet that perforates the formation, each charge including a plurality of inert particles arranged to
http://www.w3.org/ns/prov#wasQuotedFrom
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