Percy W. Schumacher

Person

Houston, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Seal assembly for roller cutter drill bit having a pressure balance...
- Patent number 5,080,183
- Issue date Jan 14, 1992
- Camco International Inc.
- Percy W. Schumacher
- E21 - EARTH DRILLING MINING
Information Patent Grant
Seal assembly for roller cutter drill bit having a pressure balance...
- Patent number 5,040,624
- Issue date Aug 20, 1991
- Percy W. Schumacher
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cutting elements for roller cutter drill bits
- Patent number 4,940,099
- Issue date Jul 10, 1990
- Reed Tool Company
- John D. Deane
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rotary drill bit having improved mounting means for multiple cuttin...
- Patent number 4,907,662
- Issue date Mar 13, 1990
- Reed Tool Company
- John D. Deane
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mounting means for cutting elements in drag type rotary drill bit
- Patent number 4,830,123
- Issue date May 16, 1989
- Reed Tool Company
- Jeffery E. Daly
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drag drill bit having improved flow of drilling fluid
- Patent number 4,794,994
- Issue date Jan 3, 1989
- Reed Tool Company
- John D. Deane
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mounting means for cutting elements in drag type rotary drill bit
- Patent number 4,682,663
- Issue date Jul 28, 1987
- Reed Tool Company
- Jeffery E. Daly
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rolling cutter drill bit
- Patent number 4,657,093
- Issue date Apr 14, 1987
- Reed Rock Bit Company
- Percy W. Schumacher
- E21 - EARTH DRILLING MINING
Information Patent Grant
Seal assembly for drill bits
- Patent number 4,623,028
- Issue date Nov 18, 1986
- Reed Tool Company
- Henry W. Murdoch
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill bit having offset roller cutters and improved nozzles
- Patent number 4,611,673
- Issue date Sep 16, 1986
- Reed Rock Bit Company
- John S. Childers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Intermittent high-drag oil well drilling bit
- Patent number 4,446,935
- Issue date May 8, 1984
- Reed Tool Company (Delaware)
- Percy W. Schumacher
- E21 - EARTH DRILLING MINING
Information Patent Grant
Combination drag and roller cutter drill bit
- Patent number 4,444,281
- Issue date Apr 24, 1984
- Reed Rock Bit Company
- Percy W. Schumacher
- E21 - EARTH DRILLING MINING
Information Patent Grant
Inserts for drilling bits
- Patent number 4,334,586
- Issue date Jun 15, 1982
- Reed Rock Bit Company
- Percy W. Schumacher
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rolling cutter drill bit
- Patent number 4,158,973
- Issue date Jun 26, 1979
- Reed Tool Company
- Percy W. Schumacher
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Drill bit
- Patent number 3,971,600
- Issue date Jul 27, 1976
- Reed Tool Company
- Henry W. Murdoch
- E21 - EARTH DRILLING MINING

Percy W. Schumacher

Person

Patents Grantslast 30 patents

Seal assembly for roller cutter drill bit having a pressure balance...

Seal assembly for roller cutter drill bit having a pressure balance...

Cutting elements for roller cutter drill bits

Rotary drill bit having improved mounting means for multiple cuttin...

Mounting means for cutting elements in drag type rotary drill bit

Drag drill bit having improved flow of drilling fluid

Mounting means for cutting elements in drag type rotary drill bit

Rolling cutter drill bit

Seal assembly for drill bits

Drill bit having offset roller cutters and improved nozzles

Intermittent high-drag oil well drilling bit

Combination drag and roller cutter drill bit

Inserts for drilling bits

Rolling cutter drill bit

Drill bit