Hans Dynge

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Kolsas, NO

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Patents Grantslast 30 patents

Information Patent Grant
Riser tube for use in great sea depth and method for drilling at su...
- Patent number 6,454,022
- Issue date Sep 24, 2002
- Petroleum Geo-Services AS
- Sigbjørn Sangesland
- E21 - EARTH DRILLING MINING