John Mitchel Cobb

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Humble, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Hydraulic jar and an overpressure relief mechanism therefor
- Patent number 7,814,995
- Issue date Oct 19, 2010
- National-Oilwell Varco, L.P.
- Jeffery Ronald Clausen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Interventionless reservoir control systems
- Patent number 7,228,914
- Issue date Jun 12, 2007
- Baker Hughes Incorporated
- Raymond D. Chavers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus to isolate a wellbore during pump workover
- Patent number 7,219,743
- Issue date May 22, 2007
- Baker Hughes Incorporated
- Sebastiaan J. Wolters
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Hydraulic Jar and an Overpressure Relief Mechanism Therefor
- Publication number 20080236894
- Publication date Oct 2, 2008
- National-Oilwell Varco, L.P.
- Jeffery Ronald Clausen
- E21 - EARTH DRILLING MINING
Information Patent Application
Interventionless Reservoir Control Systems
- Publication number 20070119599
- Publication date May 31, 2007
- BAKER HUGHES INCORPORATED
- Raymond D. Chavers
- E21 - EARTH DRILLING MINING
Information Patent Application
Interventionless reservoir control systems
- Publication number 20050092501
- Publication date May 5, 2005
- BAKER HUGHES INCORPORATED
- Raymond D. Chavers
- E21 - EARTH DRILLING MINING
Information Patent Application
Method and apparatus to isolate a wellbore during pump workover
- Publication number 20050095156
- Publication date May 5, 2005
- Baker Hughes, Incorporated
- Sebastiaan J. Wolters
- E21 - EARTH DRILLING MINING
Information Patent Application
Selective running tool with separation feature
- Publication number 20040238185
- Publication date Dec 2, 2004
- David E. Rothers
- E21 - EARTH DRILLING MINING