About: http://webisa.webdatacommons.org/100698793

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	This invention relates to a well drilling equipment, and more particularly to an apparatus designed to facilitate recovery of downhole equipment stuck in a downhole formation and/or cased hole.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com