Dong P. Phung

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Spring, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Downhole motor coupling systems and methods
- Patent number 9,670,727
- Issue date Jun 6, 2017
- National-Oilwell Varco, L.P.
- Dong P. Phung
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling motor valve and method of using same
- Patent number 9,540,877
- Issue date Jan 10, 2017
- National-Oilwell Varco, L.P.
- Curtis Lanning
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DOWNHOLE MOTOR COUPLING SYSTEMS AND METHODS
- Publication number 20150034388
- Publication date Feb 5, 2015
- National-Oilwell Varco, L.P.
- Dong P. Phung
- E21 - EARTH DRILLING MINING
Information Patent Application
DRILLING MOTOR VALVE AND METHOD OF USING SAME
- Publication number 20140041943
- Publication date Feb 13, 2014
- National Oilwell Varco, Inc.
- Curtis Lanning
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...