Inventor
ARTHERHOLT DANNY
US4 patents
Patents
4 patentsUS9879499B2Jan 30, 2018
Atmosphere to pressure ball drop apparatus
OIL STATES ENERGY SERVICES LLC2 citations68
US9447652B2Sep 20, 2016
Atmosphere to pressure ball drop apparatus
OIL STATES ENERGY SERVICES LLC4 citations68
US12259064B2Mar 25, 2025
Valve with pressure differential seating
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US12287039B2Apr 29, 2025
Valve with pressure differential seating
OIL STATES ENERGY SERVICES LLC0 citations60