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

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 – Longitudinally movable operator

Flapper closure mechanism

Wells – Valves – closures or changeable restrictors – Fluid operated

Flapper mount for well safety valve

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

Flapper type safety valve for subterranean wells

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

Flapper type safety valve for subterranean wells

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 – Longitudinally movable operator

Flapper valve assembly with floating hinge

Wells – Valves – closures or changeable restrictors – Fluid operated

Flapper valve protection

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

Flapper valve with biasing flapper closure assembly

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 – Longitudinally movable operator

Float collar