Bjoern Staale Varnes

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Patents Grantslast 30 patents

Information Patent Grant
Wellbore annular safety valve and method
- Patent number 10,174,582
- Issue date Jan 8, 2019
- Schlumberger Technology Corporation
- Eirik Windegaard
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
WELLBORE ANNULAR SAFETY VALVE AND METHOD
- Publication number 20150354315
- Publication date Dec 10, 2015
- SCHLUMBERGER TECHNOLOGY CORPORATION
- Eirik Windegaard
- E21 - EARTH DRILLING MINING
Information Patent Application
WELLBORE ANNULAR SAFETY VALVE AND METHOD
- Publication number 20150053415
- Publication date Feb 26, 2015
- SCHLUMBERGER TECHNOLOGY CORPORATION
- Eirik Windegaard
- E21 - EARTH DRILLING MINING