Inventor
PEARCE DAVID E
US8 patents
⚠️ This page may combine multiple inventors who share the name “PEARCE DAVID E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CAMCO INT
7 patentsUS4991671AFeb 12, 1991
Means for mounting a roller cutter on a drill bit
CAMCO INT69 citations94
US6109376AAug 29, 2000
Face seal having strain induced face geometry
CAMCO INT34 citations91
US5096005AMar 17, 1992
Hydraulic action for rotary drill bits
CAMCO INT37 citations90
US5029656AJul 9, 1991
Nozzle means for rotary drill bits
CAMCO INT24 citations90
US5875861AMar 2, 1999
Different stiffness energizers for MF seals
CAMCO INT23 citations89
US5676214AOct 14, 1997
Flow channels for tooth type rolling cutter drill bits
CAMCO INT18 citations82
US5465800ANov 14, 1995
Rolling cutter drill bits
CAMCO INT10 citations69