Inventor
JOHNSON CHARLES DANIEL
US7 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSON CHARLES DANIEL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VAREL INT IND LP
5 patentsUS9708858B2Jul 18, 2017
Methods to repair worn or eroded PDC cutters, cutters so repaired, and use of repaired PDC cutters in drill bits or other tools
VAREL INT IND LP1 citations50
US9435158B2Sep 6, 2016
Use of tungsten carbide tube rod to hard-face PDC matrix
VAREL INT IND LP0 citations48
US9481057B2Nov 1, 2016
Method for applying hardfacing to a matrix substrate of a drill bit
VAREL INT IND LP0 citations47
US9289864B2Mar 22, 2016
Method for repairing or reinforcing cutter pockets of a drill bit
VAREL INT IND LP0 citations47
US9375827B2Jun 28, 2016
Methods to repair worn or eroded PDC cutters, cutters so repaired, and use of repaired PDC cutters in drill bits or other tools
VAREL INT IND LP0 citations36