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

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

Apparatus for completing a well

Wells – Valves – closures or changeable restrictors – Fluid operated

Apparatus for controlling a downhole device

Wells – Valves – closures or changeable restrictors – Destructible element

Apparatus for controlling fluid flow in a conduit wall

Wells – Valves – closures or changeable restrictors – Fluid operated

Apparatus for controlling well cementing operation

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

Apparatus for locking a ball valve element in one position

Wells – Valves – closures or changeable restrictors

Apparatus for operating a closure element of a subsurface safety

Wells – Valves – closures or changeable restrictors – Fluid operated

Apparatus for retaining axial mandrel movement relative to a cyl

Wells – Valves – closures or changeable restrictors – Fluid operated

Apparatus for washover featuring controllable circulating valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Apparatus having a releasable lock

Wells – Valves – closures or changeable restrictors – Fluid operated

Auto-fill sub

Wells – Valves – closures or changeable restrictors – Fluid operated

Automatic blanking completion tool

Wells – Valves – closures or changeable restrictors – Fluid operated

Automatic fill-up floating apparatus

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

Axial equalizing valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Back pressure flapper valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Balance line hydraulically operated well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Balanced area safety valve

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 – Longitudinally movable operator

Ball seat sub