Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Michael Steven Damschen0
Don Q. Nguyen0
Michael L. Doster0
Rudolf Carl Pessier0
Date of Patent
October 26, 2010
0Patent Application Number
121799150
Date Filed
July 25, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An earth-boring bit comprising a bit body configured at its upper extent for connection into a drillstring. A selected number of fixed blades extend downward from the bit body and a selected number of rolling cutters are mounted for rotation on the bit body. A plurality of rolling-cutter cutting elements are arranged on each rolling cutter and a plurality of fixed-blade cutting elements are arranged on each fixed blade. The selected number of fixed blades exceeds the selected number of rolling cutters by at least one.
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