LandOfFree - US Patents - Listing for Wells,Valves, closures or changeable restrictors,Operated by dropped element

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Apparatus for completing a well

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Ball drop circulation valve

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Ball seat having fluid activated ball support

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Cleaning device

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Continuous orifice fill device

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Control tool

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Downhole circulation valve operated by dropping balls

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Downhole surge tools

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Drop ball catcher apparatus

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Injection valve for injecting chemicals and similar liquid subst

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Inside blowout preventer well tool

Wells – Valves – closures or changeable restrictors – Operated by dropped element

No-shock pressure plug apparatus

Wells – Valves – closures or changeable restrictors – Operated by dropped element

PDF valve

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Plug catcher tool

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Production tubes for use in the completion of an oil well

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Quick opening closure arrangement for well completions

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Single cycle dart operated circulation sub

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Sliding sleeve devices and methods using O-ring seals as...

Wells – Valves – closures or changeable restrictors – Operated by dropped element

System for running tubular members