LandOfFree - US Patents - Listing for Wells,Valves, closures or changeable restrictors

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Downhole apparatus

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole apparatus

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Downhole ball circulation tool

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole bypass valve

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

Downhole circulation valve operated by dropping balls

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Downhole flapper valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole flow control apparatus, operable via surface...

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole flow control apparatus, operable via surface...

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole flow control tool

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Downhole fluid pressure signal generation and transmission

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole injection system

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Downhole lubricator valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole mixing valve

Wells – Valves – closures or changeable restrictors

Downhole multiplexer and related methods

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Downhole safety valve operable by differential pressure

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Downhole subsurface safety valve device

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

Downhole surge tools

Wells – Valves – closures or changeable restrictors – Rotated operator

Downhole tester valve with resilient seals