-
-
Flow diverter
-
Patent number 4,971,148
-
Issue date Nov 20, 1990
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
Marine riser
-
Patent number 4,909,327
-
Issue date Mar 20, 1990
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
-
-
-
-
-
-
Marine riser fill-up valve
-
Patent number 4,621,655
-
Issue date Nov 11, 1986
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
-
Vent line system
-
Patent number 4,566,494
-
Issue date Jan 28, 1986
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
-
-
Flow diverter
-
Patent number 4,502,534
-
Issue date Mar 5, 1985
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
Threaded coupling
-
Patent number 4,496,173
-
Issue date Jan 29, 1985
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
-
Flow diverter
-
Patent number 4,456,063
-
Issue date Jun 26, 1984
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
Flow diverter
-
Patent number 4,456,062
-
Issue date Jun 26, 1984
-
Hydril Company
-
Joseph R. Roche
-
E21 - EARTH DRILLING MINING
-
-
Flow diverter
-
Patent number 4,444,250
-
Issue date Apr 24, 1984
-
Hydril Company
-
Julian D. Keithahn
-
E21 - EARTH DRILLING MINING
-