John Kelleher

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Woodward, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Self-cleaning disc valve for piston pump
- Patent number 9,739,275
- Issue date Aug 22, 2017
- Weatherford Technology Holdings, LLC
- Clark Robison
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulically actuated downhole pump with gas lock prevention
- Patent number 8,303,272
- Issue date Nov 6, 2012
- Weatherford/Lamb, Inc.
- Toby Pugh
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
SELF-CLEANING DISC VALVE FOR PISTON PUMP
- Publication number 20130195685
- Publication date Aug 1, 2013
- WEATHERFORD/LAMB, INC.
- Clark Robison
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Hydraulically Actuated Downhole Pump with Gas Lock Prevention
- Publication number 20100230091
- Publication date Sep 16, 2010
- Weatherford/Lamb Inc.
- Toby Pugh
- E21 - EARTH DRILLING MINING