Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 9, 2010
Patent Application Number
12016772
Date Filed
January 18, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
An extension sub for a downhole fishing tool, the extension sub comprising a tubular having a threaded pin end and a threaded box end, the tubular having an interior wall defining a bore, and cutting elements fixed to the interior wall of the tubular and extending into the bore of the tubular. Such a device may be referred to as a string shoe.
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