Rodrigo Ferreira Dias

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Sao Paulo, BR

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Patents Grantslast 30 patents

Information Patent Grant
Bi-directional pressure energized axial seal and a swivel connectio...
- Patent number 9,243,711
- Issue date Jan 26, 2016
- Vetco Gray Inc.
- Helvecio C. K. Silveira
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Bi-Directional Pressure Energized Axial Seal and a Swivel Connectio...
- Publication number 20130020799
- Publication date Jan 24, 2013
- Vetco Gray Inc.
- Helvecio C.K. Silveira
- E21 - EARTH DRILLING MINING