John Clunan

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Tyler, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Rolling cone drill bit having high density cutting elements
- Patent number 9,856,701
- Issue date Jan 2, 2018
- Smith International, Inc.
- Gary Ray Portwood
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rolling cone drill bit having high density cutting elements
- Patent number 9,074,431
- Issue date Jul 7, 2015
- Smith International, Inc.
- Gary Portwood
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
ROLLING CONE DRILL BIT HAVING HIGH DENSITY CUTTING ELEMENTS
- Publication number 20150376951
- Publication date Dec 31, 2015
- Smith International, Inc.
- Gary Ray Portwood
- E21 - EARTH DRILLING MINING
Information Patent Application
Rolling Cone Drill Bit Having High Density Cutting Elements
- Publication number 20090188724
- Publication date Jul 30, 2009
- Smith International, Inc.
- Gary Portwood
- E21 - EARTH DRILLING MINING