Inventor
ISBELL MATTHEW R
US29 patents
⚠️ This page may combine multiple inventors who share the name “ISBELL MATTHEW R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES INC
23 patentsUS5479997AJan 2, 1996
Earth-boring bit with improved cutting structure
BAKER HUGHES INC139 citations99
US5311958AMay 17, 1994
Earth-boring bit with an advantageous cutting structure
BAKER HUGHES INC152 citations99
US6408958B1Jun 25, 2002
Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped
BAKER HUGHES INC212 citations98
US7497280B2Mar 3, 2009
Abrasive-impregnated cutting structure having anisotropic wear resistance and drag bit including same
BAKER HUGHES INC59 citations97
US6510906B1Jan 28, 2003
Impregnated bit with PDC cutters in cone area
BAKER HUGHES INC282 citations97
US6883623B2Apr 26, 2005
Earth boring apparatus and method offering improved gage trimmer protection
BAKER HUGHES INC132 citations96
US5586612ADec 24, 1996
Roller cone bit with positive and negative offset and smooth running configuration
BAKER HUGHES INC82 citations96
US5542485AAug 6, 1996
Earth-boring bit with improved cutting structure
BAKER HUGHES INC68 citations96
US5351768AOct 4, 1994
Earth-boring bit with improved cutting structure
BAKER HUGHES INC100 citations96
US5323865AJun 28, 1994
Earth-boring bit with an advantageous insert cutting structure
BAKER HUGHES INC61 citations96
US6843333B2Jan 18, 2005
Impregnated rotary drag bit
BAKER HUGHES INC115 citations95
US5592995AJan 14, 1997
Earth-boring bit having shear-cutting heel elements
BAKER HUGHES INC100 citations95
US5996713ADec 7, 1999
Rolling cutter bit with improved rotational stabilization
BAKER HUGHES INC79 citations94
US7861809B2Jan 4, 2011
Rotary drag bit with multiple backup cutters
BAKER HUGHES INC17 citations91
US7762355B2Jul 27, 2010
Rotary drag bit and methods therefor
BAKER HUGHES INC32 citations91
US8356398B2Jan 22, 2013
Modular hybrid drill bit
BAKER HUGHES INC26 citations89
US7647991B2Jan 19, 2010
Cutting structure for earth-boring bit to reduce tracking
BAKER HUGHES INC19 citations89
US7954571B2Jun 7, 2011
Cutting structures for casing component drillout and earth-boring drill bits including same
BAKER HUGHES INC11 citations83
US7066288B2Jun 27, 2006
Asymmetric compact for drill bit
BAKER HUGHES INC9 citations72
US8662207B2Mar 4, 2014
Rotary drag bits including abrasive-impregnated cutting structures
BAKER HUGHES INC1 citations62
US7096981B2Aug 29, 2006
Alternating inclinations of compacts for drill bit
BAKER HUGHES INC6 citations61
US9637979B2May 2, 2017
Rotary drag bits including abrasive-impregnated cutting structures
BAKER HUGHES INC0 citations52
USRE42445EJun 14, 2011
Cutting structure for earth-boring bit to reduce tracking
BAKER HUGHES INC0 citations49