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

Wells – Valves – closures or changeable restrictors

Electric-hydraulic power unit

Wells – Valves – closures or changeable restrictors – Fluid operated

Electric-hydraulic power unit

Wells – Valves – closures or changeable restrictors – Fluid operated

Electric-hydraulic power unit

Wells – Valves – closures or changeable restrictors – Fluid operated

Electric-hydraulic power unit

Wells – Valves – closures or changeable restrictors

Enhanced recovery with geopressured water resource

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing apparatus for use with wireline-conveyable pumps

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

Equalizing flapper for down hole safety valves

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing flapper for high slam rate applications

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing means for a subsurface well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing means for a subsurface well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing means for a subsurface well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing means for well tools

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing subsurface safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing subsurface safety valve with injection system

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing valve for subterranean wells

Wells – Valves – closures or changeable restrictors

Equalizing valve for use in a well tool string

Wells – Valves – closures or changeable restrictors – Fluid operated

Equalizing valve seat for a subsurface safety valve

Wells – Valves – closures or changeable restrictors

Exhaust system and process for removing underground contaminant

Wells – Valves – closures or changeable restrictors – Fluid operated

Expandable injector pipe