Valence Operating Company

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Kingwood, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Gas displaced chamber lift system having gas lift assist
- Patent number 6,354,377
- Issue date Mar 12, 2002
- Valence Operating Company
- Jon R. Averhoff
- E21 - EARTH DRILLING MINING
Information Patent Grant
Gas displaced chamber lift system with closed loop/multi-stage vents
- Patent number 6,269,884
- Issue date Aug 7, 2001
- Valence Operating Company
- Jon R. Averhoff
- E21 - EARTH DRILLING MINING
Information Patent Grant
Gas displaced chamber lift system having a double chamber
- Patent number 6,237,692
- Issue date May 29, 2001
- Valence Operating Company
- Jon R. Averhoff
- E21 - EARTH DRILLING MINING