Alf Kolbjorn Sevre

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Hundvaag, NO

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Patents Grantslast 30 patents

Information Patent Grant
Swellable packer construction
- Patent number 7,849,930
- Issue date Dec 14, 2010
- Halliburton Energy Services, Inc.
- Christopher J. Chalker
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Swellable Packer Construction
- Publication number 20080078561
- Publication date Apr 3, 2008
- Christopher J. Chalker
- E21 - EARTH DRILLING MINING