David James Alexander

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Banchory, GB

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Patents Grantslast 30 patents

Information Patent Grant
Split seat shear valve
- Patent number 9,316,322
- Issue date Apr 19, 2016
- Vetco Gray U.K. Limited
- David James Alexander
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Rotational shear valve
- Patent number 9,309,737
- Issue date Apr 12, 2016
- Vetco Gray U.K. Limited
- David J. Alexander
- E21 - EARTH DRILLING MINING
Information Patent Grant
Riser bending relief joint
- Patent number 8,720,953
- Issue date May 13, 2014
- Vetco Gray Inc.
- David James Alexander
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Split Seat Shear Valve
- Publication number 20140001390
- Publication date Jan 2, 2014
- Vetco Gray U.K., Limited
- David James Alexander
- E21 - EARTH DRILLING MINING
Information Patent Application
ROTATIONAL SHEAR VALVE
- Publication number 20130327536
- Publication date Dec 12, 2013
- VETCO GRAY U.K. LIMITED
- David J. Alexander
- E21 - EARTH DRILLING MINING
Information Patent Application
RISER BENDING RELIEF JOINT
- Publication number 20120193906
- Publication date Aug 2, 2012
- David James Alexander
- E21 - EARTH DRILLING MINING