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

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

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 – Longitudinally movable operator

Flow control apparatus for use in a subterranean well and associ

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

Flow control apparatus with specific latching means for use in a

Wells – Valves – closures or changeable restrictors – Fluid operated

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

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

Flow control device

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

Flow control device

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

Flow control device

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

Flow control in a well bore