Inventor

VOSS JR ROBERT K

US3 patents

Patents

3 patents

US5366017ANov 22, 1994

Intermediate casing annulus monitor

VETCO GRAY INC ABB65 citations92

US6763891B2Jul 20, 2004

Production tree with multiple safety barriers

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US6186237B1Feb 13, 2001

Annulus check valve with tubing plug back-up

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