Christopher Brian Walker

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Cypress, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Power swivel and lubrication system
- Patent number 11,421,479
- Issue date Aug 23, 2022
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Guidance systems and apparatus for power swivel
- Patent number 11,136,826
- Issue date Oct 5, 2021
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Power swivel and gooseneck
- Patent number 10,947,796
- Issue date Mar 16, 2021
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Washpipe assemblies for a power swivel
- Patent number 10,563,770
- Issue date Feb 18, 2020
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
GUIDANCE SYSTEMS AND APPARATUS FOR POWER SWIVEL
- Publication number 20200308911
- Publication date Oct 1, 2020
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- E21 - EARTH DRILLING MINING
Information Patent Application
POWER SWIVEL AND GOOSENECK
- Publication number 20200248513
- Publication date Aug 6, 2020
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- E21 - EARTH DRILLING MINING
Information Patent Application
POWER SWIVEL AND LUBRICATION SYSTEM
- Publication number 20180313154
- Publication date Nov 1, 2018
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
WASHPIPE ASSEMBLIES FOR A POWER SWIVEL
- Publication number 20170321807
- Publication date Nov 9, 2017
- National-Oilwell Varco, L.P.
- Christopher Brian Walker
- E21 - EARTH DRILLING MINING