CNPC Greatwall Drilling Engineering Company Limited

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method for reclaim of carbon dioxide and nitrogen from boiler flue gas
- Patent number 7,754,102
- Issue date Jul 13, 2010
- CNPC Greatwall Drilling Engineering Company Ltd.
- Fengshan Zhang
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Oil recovery by injection of steam, carbon dioxide and nitrogen
- Patent number 7,644,756
- Issue date Jan 12, 2010
- CNPC Greatwall Drilling Engineering Company Limited
- Fengshan Zhang
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...