Inventor
LEANY FRANCIS
US35 patents
⚠️ This page may combine multiple inventors who share the name “LEANY FRANCIS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HALL DAVID R
27 patentsUS7475948B2Jan 13, 2009
Pick with a bearing
HALL DAVID R63 citations98
US7469971B2Dec 30, 2008
Lubricated pick
HALL DAVID R49 citations96
US7398837B2Jul 15, 2008
Drill bit assembly with a logging device
HALL DAVID R91 citations95
US9316061B2Apr 19, 2016
High impact resistant degradation element
HALL DAVID R38 citations94
US7694756B2Apr 13, 2010
Indenting member for a drill bit
HALL DAVID R25 citations93
US7419016B2Sep 2, 2008
Bi-center drill bit
HALL DAVID R44 citations93
US7337858B2Mar 4, 2008
Drill bit assembly adapted to provide power downhole
HALL DAVID R41 citations93
US8950517B2Feb 10, 2015
Drill bit with a retained jack element
HALL DAVID R20 citations92
US8567532B2Oct 29, 2013
Cutting element attached to downhole fixed bladed bit at a positive rake angle
HALL DAVID R20 citations92
USD674422SJan 15, 2013
Drill bit with a pointed cutting element and a shearing cutting element
HALL DAVID R18 citations92
US7426968B2Sep 23, 2008
Drill bit assembly with a probe
HALL DAVID R32 citations92
US7179018B2Feb 20, 2007
Apparatus and method for working asphalt pavement
HALL DAVID R24 citations89
US8714285B2May 6, 2014
Method for drilling with a fixed bladed bit
HALL DAVID R8 citations84
US8701799B2Apr 22, 2014
Drill bit cutter pocket restitution
HALL DAVID R8 citations84
US8616305B2Dec 31, 2013
Fixed bladed bit that shifts weight between an indenter and cutting elements
HALL DAVID R7 citations84
US8550190B2Oct 8, 2013
Inner bit disposed within an outer bit
HALL DAVID R16 citations84
USD678368SMar 19, 2013
Drill bit with a pointed cutting element
HALL DAVID R9 citations84
US7690138B2Apr 6, 2010
Rolling assembly mounted on a trencher
HALL DAVID R15 citations84
US7600376B2Oct 13, 2009
Energy storage
HALL DAVID R14 citations84
US8191651B2Jun 5, 2012
Sensor on a formation engaging member of a drill bit
HALL DAVID R10 citations83
US7506706B2Mar 24, 2009
Retaining element for a jack element
HALL DAVID R11 citations83
US7677036B2Mar 16, 2010
Hydraulic energy storage with an internal element
HALL DAVID R3 citations63
US8839888B2Sep 23, 2014
Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
HALL DAVID R2 citations62
US8596381B2Dec 3, 2013
Sensor on a formation engaging member of a drill bit
HALL DAVID R2 citations62
US7908851B2Mar 22, 2011
Hydraulic energy storage with reinforced layer
HALL DAVID R2 citations60
US7526918B2May 5, 2009
Hydraulic energy storage with reinforced layer
HALL DAVID R3 citations60
US8141662B2Mar 27, 2012
Downhole lubrication system
HALL DAVID R0 citations51
SCHLUMBERGER TECHNOLOGY CORP
7 patentsUS7753144B2Jul 13, 2010
Drill bit with a retained jack element
SCHLUMBERGER TECHNOLOGY CORP9 citations81
US9366089B2Jun 14, 2016
Cutting element attached to downhole fixed bladed bit at a positive rake angle
SCHLUMBERGER TECHNOLOGY CORP3 citations73
US8342611B2Jan 1, 2013
Spring loaded pick
SCHLUMBERGER TECHNOLOGY CORP3 citations63
US7926883B2Apr 19, 2011
Spring loaded pick
SCHLUMBERGER TECHNOLOGY CORP4 citations63
US8020637B2Sep 20, 2011
Downhole lubrication system
SCHLUMBERGER TECHNOLOGY CORP3 citations62
US7891453B2Feb 22, 2011
Energy storage in an elastic vessel
SCHLUMBERGER TECHNOLOGY CORP3 citations60
US9677343B2Jun 13, 2017
Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
SCHLUMBERGER TECHNOLOGY CORP0 citations52