Derek Stuart

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Aberdeenshire, GB

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Patents Grantslast 30 patents

Information Patent Grant
Downhole pulse generating device
- Patent number 9,273,529
- Issue date Mar 1, 2016
- National-Oilwell Varco, L.P.
- Alan Martyn Eddison
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole tractor
- Patent number 9,004,194
- Issue date Apr 14, 2015
- National-Oilwell Varco, L.P.
- Alan Martyn Eddison
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DOWNHOLE PULSE GENERATING DEVICE
- Publication number 20150075867
- Publication date Mar 19, 2015
- National-Oilwell Varco, L.P.
- Alan Martyn EDDISON
- E21 - EARTH DRILLING MINING
Information Patent Application
DOWNHOLE TRACTOR
- Publication number 20120279724
- Publication date Nov 8, 2012
- NATIONAL OILWELL VARCO. L.P.
- Alan Martyn Eddison
- E21 - EARTH DRILLING MINING