-
-
VALVE ASSEMBLY FOR WELL SYSTEMS
-
Publication number 20220260162
-
Publication date Aug 18, 2022
-
National-Oilwell Varco, L.P.
-
James W. Weir
-
E21 - EARTH DRILLING MINING
-
-
Pilot Close Vent Valve
-
Publication number 20200362885
-
Publication date Nov 19, 2020
-
Travis James Miller
-
F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
-
-
-
SLOW-SHIFT SPM VALVE
-
Publication number 20190264829
-
Publication date Aug 29, 2019
-
National-Oilwell Varco, L.P.
-
James Ray Landrith
-
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
-
VALVE ASSEMBLY FOR WELL SYSTEMS
-
Publication number 20190264822
-
Publication date Aug 29, 2019
-
National-Oilwell Varco, L.P.
-
James W. Weir
-
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
-
-
-
-
Slow-Shift SPM Valve
-
Publication number 20160153578
-
Publication date Jun 2, 2016
-
National-Oilwell Varco, L.P.
-
James Ray Landrith
-
E21 - EARTH DRILLING MINING
-
MUD HYDRAULIC TOP DRIVE
-
Publication number 20150027782
-
Publication date Jan 29, 2015
-
National-Oilwell Varco, L.P.
-
James William WEIR
-
E21 - EARTH DRILLING MINING
-
-
-
-
-
-
Dual-Flow Valve and Swivel
-
Publication number 20130126769
-
Publication date May 23, 2013
-
National-Oilwell Varco, L.P.
-
James William Weir
-
E21 - EARTH DRILLING MINING
-
-
-
-
-