Keith E. Lewis

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Bangkok, TH

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Patents Grantslast 30 patents

Information Patent Grant
Model HCCV hydrostatic closed circulation valve
- Patent number 7,464,758
- Issue date Dec 16, 2008
- Baker Hughes Incorporated
- Joseph C. H. Yeo
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mono-trip cement thru completion
- Patent number 7,373,980
- Issue date May 20, 2008
- Baker Hughes Incorporated
- Keith E. Lewis
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cement through side pocket mandrel
- Patent number 7,228,897
- Issue date Jun 12, 2007
- Baker Hughes Incorporated
- James H. Holt, Jr.
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mono-trip cement thru completion
- Patent number 7,069,992
- Issue date Jul 4, 2006
- Baker Hughes Incorporated
- Keith E. Lewis
- E21 - EARTH DRILLING MINING
Information Patent Grant
Model HCCV hydrostatic closed circulation valve
- Patent number 7,063,152
- Issue date Jun 20, 2006
- Baker Hughes Incorporated
- Joseph C. H. Yeo
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Mono-trip cement thru completion
- Publication number 20070029092
- Publication date Feb 8, 2007
- BAKER HUGHES INCORPORATED
- Keith E. Lewis
- E21 - EARTH DRILLING MINING
Information Patent Application
Model HCCV hydrostatic closed circulation valve
- Publication number 20060237191
- Publication date Oct 26, 2006
- BAKER HUGHES INCORPORATED
- Joseph C.H. Yeo
- E21 - EARTH DRILLING MINING
Information Patent Application
Cement through side pocket mandrel
- Publication number 20040112599
- Publication date Jun 17, 2004
- BAKER HUGHES INCORPORATED
- James H. Holt
- E21 - EARTH DRILLING MINING
Information Patent Application
Mono-trip cement thru completion
- Publication number 20040112606
- Publication date Jun 17, 2004
- BAKER HUGHES INCORPORATED
- Keith E. Lewis
- E21 - EARTH DRILLING MINING