Duane D. Papke

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Alberta, CA

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for well drilling
- Patent number 4,792,000
- Issue date Dec 20, 1988
- Oil Patch Group, Inc.
- Gregg S. Perkin
- E21 - EARTH DRILLING MINING
Information Patent Grant
Stabilizing tool for well drilling
- Patent number 4,776,410
- Issue date Oct 11, 1988
- Oil Patch Group Inc.
- Gregg S. Perkin
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reaming apparatus for well drilling
- Patent number 4,765,417
- Issue date Aug 23, 1988
- Oil Patch Group Inc.
- Gregg S. Perkin
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method for assembling a well drilling tool
- Patent number 4,709,462
- Issue date Dec 1, 1987
- Oil Patch Group, Inc.
- Gregg S. Perkin
- E21 - EARTH DRILLING MINING