Andrew Shelton

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Circulation sub and method for using same
- Patent number 10,487,623
- Issue date Nov 26, 2019
- National-Oilwell Varco, L.P.
- James William Weir
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Circulation sub and method for using same
- Patent number 9,371,708
- Issue date Jun 21, 2016
- National-Oilwell Varco, L.P.
- James William Weir
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
CIRCULATION SUB AND METHOD FOR USING SAME
- Publication number 20200088008
- Publication date Mar 19, 2020
- National-Oilwell Varco, L.P.
- James William Weir
- E21 - EARTH DRILLING MINING
Information Patent Application
CIRCULATION SUB AND METHOD FOR USING SAME
- Publication number 20160265311
- Publication date Sep 15, 2016
- National-Oilwell Varco, L.P.
- James William Weir
- E21 - EARTH DRILLING MINING
Information Patent Application
CIRCULATION SUB AND METHOD FOR USING SAME
- Publication number 20130112428
- Publication date May 9, 2013
- National-Oilwell Varco, L.P.
- James William Weir
- E21 - EARTH DRILLING MINING