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

Wells – Valves – closures or changeable restrictors – Fluid operated

Failsafe control system for a subsurface safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Failsafe gas closed safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Fill up tool and mud saver for top drives

Wells – Valves – closures or changeable restrictors – Fluid operated

Fill valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Fill valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Fill valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Flapper mount for well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Flapper valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Flapper valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Flapper valve protection

Wells – Valves – closures or changeable restrictors – Fluid operated

Flexible matrix composite actuator for use in subsurface...

Wells – Valves – closures or changeable restrictors – Fluid operated

Flexible piston well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Float collar

Wells – Valves – closures or changeable restrictors – Fluid operated

Float valve assembly for downhole tubulars

Wells – Valves – closures or changeable restrictors – Fluid operated

Floating plate back pressure valve assembly

Wells – Valves – closures or changeable restrictors – Fluid operated

Flow control assembly having a fixed flow control device and...

Wells – Valves – closures or changeable restrictors – Fluid operated

Flow control system

Wells – Valves – closures or changeable restrictors – Fluid operated

Flow control systems and methods

Wells – Valves – closures or changeable restrictors – Fluid operated

Flow reversing apparatus and methods of use