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

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

Multi-cycle downhole apparatus

Wells – Valves – closures or changeable restrictors – Fluid operated

Multi-cycle single line switch

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

Multi-function indicating tool

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

Multi-position valve for fracturing and sand control and...

Wells – Valves – closures or changeable restrictors – Fluid operated

Multi-purpose pressure operated downhole valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Multi-stage sliding valve fluid operated and pressure balanced

Wells – Valves – closures or changeable restrictors – Destructible element

Multi-use tubing disconnect

Wells – Valves – closures or changeable restrictors – Fluid operated

Multicycle hydraulic control valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Multiple zone downhole intelligent flow control valve system...

Wells – Valves – closures or changeable restrictors – Fluid operated

Multiple zone downhole intelligent flow control valve system...

Wells – Valves – closures or changeable restrictors

Natural gas production from geopressured aquifers

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

No-shock pressure plug apparatus

Wells – Valves – closures or changeable restrictors – Destructible element

Oil well standing valve

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

Oil well testing apparatus

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

Oil well testing safety valve

Wells – Valves – closures or changeable restrictors

Oil well testing string bypass valve

Wells – Valves – closures or changeable restrictors

Oil well testing valve with liquid spring

Wells – Valves – closures or changeable restrictors – Fluid operated

Oil-well flap-type safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Oil-well safety-valve and tool for installing the same