James C. Walter

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Houston, TX, US

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Patents Grantslast 30 patents

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
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
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