DUAL GRADIENT SYSTEMS, LLC

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Richmond, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Continuous circulating sub for drill strings
- Patent number 8,844,653
- Issue date Sep 30, 2014
- Dual Gradient Systems, LLC
- Luc deBoer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill string flow control valves and methods
- Patent number 8,393,403
- Issue date Mar 12, 2013
- Dual Gradient Systems, LLC
- Luc de Boer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill string flow control valves and methods
- Patent number 8,066,079
- Issue date Nov 29, 2011
- Dual Gradient Systems, LLC
- Luc de Boer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dual gradient drilling method and apparatus with an adjustable cent...
- Patent number 7,992,654
- Issue date Aug 9, 2011
- Dual Gradient Systems, LLC
- Luc deBoer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dual gradient drilling method and apparatus with multiple concentri...
- Patent number 7,992,655
- Issue date Aug 9, 2011
- Dual Gradient Systems, LLC
- Luc deBoer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dual gradient drilling method and apparatus with an adjustable cent...
- Patent number 7,762,357
- Issue date Jul 27, 2010
- Dual Gradient Systems, LLC
- Luc deBoer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill string flow control valves and methods
- Patent number 7,584,801
- Issue date Sep 8, 2009
- Dual Gradient Systems, LLC
- Luc deBoer
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Drill String Control Valves and Methods
- Publication number 20100044054
- Publication date Feb 25, 2010
- DUAL GRADIENT SYSTEMS, LLC
- Luc de Boer
- E21 - EARTH DRILLING MINING

Trademarklast 30 trademarks