Olaf Bertelsen

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Algard, NO

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Patents Grantslast 30 patents

Information Patent Grant
Device and a method for disconnecting a tool from a pipe string
- Patent number 7,174,963
- Issue date Feb 13, 2007
- Bakke Oil Tools, AS
- Olaf Bertelsen
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Device and a method for disconnecting a tool from a pipe string
- Publication number 20040216887
- Publication date Nov 4, 2004
- Olaf Bertelsen
- E21 - EARTH DRILLING MINING