Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Clark Barton Keck0
Date of Patent
April 21, 2009
0Patent Application Number
120517420
Date Filed
March 19, 2008
0Patent Primary Examiner
Patent abstract
A collar for protecting a body inside a borehole of a well, with a collar outer diameter larger than the body outer diameter, a plurality of offset indentations formed on the outer side of the collar formed in rows of four to eight offset indentations along a diagonal orientation to a collar axis. A metal carbide inserts engages each offset indentation with an interference fit forming a wear resistant pad on the outer side of the collar. A sealing means is disposed between a bottom beveled edge of a collar and the body forming a sealed sub assembly. At least two spring locking apparatus engaging a locking portion on the body.
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