Fokko Harm Cornelis Doornbosch

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Sola, NL

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Patents Grantslast 30 patents

Information Patent Grant
Device for the focus and control of dynamic underbalance or dynamic...
- Patent number 8,726,996
- Issue date May 20, 2014
- Schlumberger Technology Corporation
- Adil Mahallab Al Busaidy
- E21 - EARTH DRILLING MINING
Information Patent Grant
Controlling transient underbalance in a wellbore
- Patent number 6,732,798
- Issue date May 11, 2004
- Schlumberger Technology Corporation
- Ashley B. Johnson
- F42 - AMMUNITION BLASTING

Patents Applicationslast 30 patents

Information Patent Application
Device for the Focus and Control of Dynamic Underbalance or Dynamic...
- Publication number 20110132608
- Publication date Jun 9, 2011
- SCHLUMBERGER TECHNOLOGY CORPORATION
- Adil Mahallab Al Busaidy
- E21 - EARTH DRILLING MINING
Information Patent Application
Creating an underbalance condition in a wellbore
- Publication number 20040159432
- Publication date Aug 19, 2004
- Ashley B. Johnson
- F42 - AMMUNITION BLASTING