David E. Pearce

Person

Houston, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Face seal having strain induced face geometry
- Patent number 6,109,376
- Issue date Aug 29, 2000
- Camco International Inc.
- David E. Pearce
- E21 - EARTH DRILLING MINING
Information Patent Grant
Different stiffness energizers for MF seals
- Patent number 5,875,861
- Issue date Mar 2, 1999
- Camco International Inc.
- Jeffery E. Daly
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Flow channels for tooth type rolling cutter drill bits
- Patent number 5,676,214
- Issue date Oct 14, 1997
- Camco International Inc.
- David E. Pearce
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rolling cutter drill bits
- Patent number 5,465,800
- Issue date Nov 14, 1995
- Camco International Inc.
- David E. Pearce
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulic action for rotary drill bits
- Patent number 5,096,005
- Issue date Mar 17, 1992
- Camco International Inc.
- Craig R. Ivie
- E21 - EARTH DRILLING MINING
Information Patent Grant
Nozzle means for rotary drill bits
- Patent number 5,029,656
- Issue date Jul 9, 1991
- Camco International Inc.
- Craig R. Ivie
- E21 - EARTH DRILLING MINING
Information Patent Grant
Means for mounting a roller cutter on a drill bit
- Patent number 4,991,671
- Issue date Feb 12, 1991
- Camco International Inc.
- David E. Pearce
- E21 - EARTH DRILLING MINING
Information Patent Grant
Means for retaining roller cutters on rotary drill bit
- Patent number 4,911,255
- Issue date Mar 27, 1990
- Reed Tool Company
- David E. Pearce
- E21 - EARTH DRILLING MINING

David E. Pearce

Person

Patents Grantslast 30 patents

Face seal having strain induced face geometry

Different stiffness energizers for MF seals

Flow channels for tooth type rolling cutter drill bits

Rolling cutter drill bits

Hydraulic action for rotary drill bits

Nozzle means for rotary drill bits

Means for mounting a roller cutter on a drill bit

Means for retaining roller cutters on rotary drill bit