P

Inventor

SCHUMACHER PERCY W

US10 patents
⚠️ This page may combine multiple inventors who share the name “SCHUMACHER PERCY W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

REED TOOL CO

6 patents
US4682663AJul 28, 1987

Mounting means for cutting elements in drag type rotary drill bit

REED TOOL CO67 citations95
US4940099AJul 10, 1990

Cutting elements for roller cutter drill bits

REED TOOL CO113 citations94
US4907662AMar 13, 1990

Rotary drill bit having improved mounting means for multiple cutting elements

REED TOOL CO44 citations92
US4830123AMay 16, 1989

Mounting means for cutting elements in drag type rotary drill bit

REED TOOL CO25 citations92
US4794994AJan 3, 1989

Drag drill bit having improved flow of drilling fluid

REED TOOL CO26 citations92
US4623028ANov 18, 1986

Seal assembly for drill bits

REED TOOL CO36 citations91

REED ROCK BIT CO

2 patents
US4334586AJun 15, 1982

Inserts for drilling bits

REED ROCK BIT CO152 citations96
US4657093AApr 14, 1987

Rolling cutter drill bit

REED ROCK BIT CO70 citations95

CAMCO INT

1 patent
US5080183AJan 14, 1992

Seal assembly for roller cutter drill bit having a pressure balanced lubrication system

CAMCO INT48 citations91

SCHUMACHER PERCY W

1 patent
US5040624AAug 20, 1991

Seal assembly for roller cutter drill bit having a pressure balanced lubrication system

SCHUMACHER PERCY W40 citations88