David Trevas

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Variable radius annular and ram packing unit and method
- Patent number 8,353,497
- Issue date Jan 15, 2013
- Hydril USA Manufacturing LLC
- David Alexander Trevas
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rotary impact well drilling system and method
- Patent number 7,096,980
- Issue date Aug 29, 2006
- Halliburton Energy Services, Inc.
- David Trevas
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
VARIABLE RADIUS ANNULAR AND RAM PACKING UNIT AND METHOD
- Publication number 20100147536
- Publication date Jun 17, 2010
- David Alexander Trevas
- E21 - EARTH DRILLING MINING
Information Patent Application
SYSTEM, METHOD, AND APPARATUS FOR VARIABLE JUNK SLOT DEPTH IN DRILL...
- Publication number 20090095537
- Publication date Apr 16, 2009
- BAKER HUGHES INCORPORATED
- Timothy King Marvel
- E21 - EARTH DRILLING MINING
Information Patent Application
Rotary impact well drilling system and method
- Publication number 20040222021
- Publication date Nov 11, 2004
- Halliburton Energy Services, Inc.
- David Trevas
- E21 - EARTH DRILLING MINING