Inventor
OLDHAM JACK T
US29 patents
⚠️ This page may combine multiple inventors who share the name “OLDHAM JACK T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES INC
17 patentsUS7395882B2Jul 8, 2008
Casing and liner drilling bits
BAKER HUGHES INC154 citations99
US5957223ASep 28, 1999
Bi-center drill bit with enhanced stabilizing features
BAKER HUGHES INC243 citations99
US7096978B2Aug 29, 2006
Drill bits with reduced exposure of cutters
BAKER HUGHES INC109 citations98
US6779613B2Aug 24, 2004
Drill bits with controlled exposure of cutters
BAKER HUGHES INC118 citations98
US6460631B2Oct 8, 2002
Drill bits with reduced exposure of cutters
BAKER HUGHES INC161 citations98
US7178609B2Feb 20, 2007
Window mill and drill bit
BAKER HUGHES INC67 citations95
US6935441B2Aug 30, 2005
Drill bits with reduced exposure of cutters
BAKER HUGHES INC65 citations95
US8006785B2Aug 30, 2011
Casing and liner drilling bits and reamers
BAKER HUGHES INC24 citations92
US7814990B2Oct 19, 2010
Drilling apparatus with reduced exposure of cutters and methods of drilling
BAKER HUGHES INC16 citations92
US7748475B2Jul 6, 2010
Earth boring drill bits with casing component drill out capability and methods of use
BAKER HUGHES INC21 citations92
US7624818B2Dec 1, 2009
Earth boring drill bits with casing component drill out capability and methods of use
BAKER HUGHES INC37 citations92
US7455125B2Nov 25, 2008
Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design and operation thereof
BAKER HUGHES INC29 citations92
US7954570B2Jun 7, 2011
Cutting elements configured for casing component drillout and earth boring drill bits including same
BAKER HUGHES INC15 citations82
US9670736B2Jun 6, 2017
Hybrid drill bit
BAKER HUGHES INC3 citations71
US7703558B2Apr 27, 2010
Drilling tool for reducing cutter damage when drilling through formation changes, and methods of design and operation thereof
BAKER HUGHES INC5 citations63
US10316589B2Jun 11, 2019
Hybrid drill bit and design method
BAKER HUGHES INC1 citations62
US9957757B2May 1, 2018
Cutting elements for drill bits for drilling subterranean formations and methods of forming such cutting elements
BAKER HUGHES INC0 citations50
OLDHAM JACK T
5 patentsUS8167059B2May 1, 2012
Casing and liner drilling shoes having spiral blade configurations, and related methods
OLDHAM JACK T8 citations83
US8225887B2Jul 24, 2012
Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methods
OLDHAM JACK T4 citations73
US8225888B2Jul 24, 2012
Casing shoes having drillable and non-drillable cutting elements in different regions and related methods
OLDHAM JACK T3 citations73
US8205693B2Jun 26, 2012
Casing and liner drilling shoes having selected profile geometries, and related methods
OLDHAM JACK T4 citations73
US8297380B2Oct 30, 2012
Casing and liner drilling shoes having integrated operational components, and related methods
OLDHAM JACK T1 citations62