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

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

Casing shoes and methods of reverse-circulation cementing of...

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

Casing shut-in valve system

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

Casing valve

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

Catcher sub

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

Cement control ring

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

Cementing tool with protective sleeve

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

Choke valve assembly for downhole flow control

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

Closure mechanism with integrated actuator for subsurface...

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

Constant bottom contact tool

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

Control apparatus for oil well production string closing tool

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

Curved flapper and seat for a subsurface saftey valve

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

Curved flapper valve

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

Curved flapper with angle variant seat for a subsurface...