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

Wells – Valves – closures or changeable restrictors – Fluid operated

Circulating valve for wells

Wells – Valves – closures or changeable restrictors – Destructible element

Circulation valve

Wells – Valves – closures or changeable restrictors – Destructible element

Circulation valve

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

Cleaning device

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

Closure mechanism with integrated actuator for subsurface...

Wells – Valves – closures or changeable restrictors – Fluid operated

Coiled tubing apparatus

Wells – Valves – closures or changeable restrictors – Fluid operated

Coiled tubing safety valve and assembly

Wells – Valves – closures or changeable restrictors

Completing wells in deep reservoirs containing fluids that are h

Wells – Valves – closures or changeable restrictors

Composite sucker rod string and method of use thereof

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

Constant bottom contact tool

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

Continuous orifice fill device

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

Control apparatus for oil well production string closing tool

Wells – Valves – closures or changeable restrictors – Destructible element

Control fluid communication nipple

Wells – Valves – closures or changeable restrictors – Fluid operated

Control line hydrostatic minimally sensitive control system

Wells – Valves – closures or changeable restrictors

Control line tubing hanger

Wells – Valves – closures or changeable restrictors – Fluid operated

Control system communication and lock open tool and method...

Wells – Valves – closures or changeable restrictors – Fluid operated

Control system for deep set subsurface valves

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

Control tool

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

Curved flapper and seat for a subsurface saftey valve