Gregory E. Hennig

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Aberdeen, GB

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Patents Grantslast 30 patents

Information Patent Grant
Main bore isolation assembly for multi-lateral use
- Patent number 6,145,593
- Issue date Nov 14, 2000
- Baker Hughes Incorporated
- Gregory E. Hennig
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus and method for temporary subsurface well sealing and equi...
- Patent number 5,697,449
- Issue date Dec 16, 1997
- Baker Hughes Incorporated
- Gregory E. Hennig
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pressure-actuated valve and method
- Patent number 5,609,178
- Issue date Mar 11, 1997
- Baker Hughes Incorporated
- Gregory E. Hennig
- E21 - EARTH DRILLING MINING