Inventor
RUFF DANIEL E
US14 patents
⚠️ This page may combine multiple inventors who share the name “RUFF DANIEL E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES INC
11 patentsUS7096978B2Aug 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
US7066280B2Jun 27, 2006
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC73 citations97
US6571886B1Jun 3, 2003
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
BAKER HUGHES INC98 citations97
US6935441B2Aug 30, 2005
Drill bits with reduced exposure of cutters
BAKER HUGHES INC65 citations95
US7814990B2Oct 19, 2010
Drilling apparatus with reduced exposure of cutters and methods of drilling
BAKER HUGHES INC16 citations92
US7472764B2Jan 6, 2009
Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture
BAKER HUGHES INC15 citations91
US7861806B2Jan 4, 2011
Shank structure for rotary drill bits
BAKER HUGHES INC3 citations61
US7600589B2Oct 13, 2009
Rotary drill bits
BAKER HUGHES INC2 citations61
US7594454B2Sep 29, 2009
Methods of fabricating rotary drill bits
BAKER HUGHES INC3 citations61