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

Wells – Valves – closures or changeable restrictors – Destructible element

Differential valve

Wells – Valves – closures or changeable restrictors – Destructible element

Drop ball sub-assembly for a down-hole device

Wells – Valves – closures or changeable restrictors – Destructible element

Dump valve assembly for selective draining of liquid from an...

Wells – Valves – closures or changeable restrictors – Destructible element

Full bore sampler valve apparatus

Wells – Valves – closures or changeable restrictors – Destructible element

Full-opening annulus pressure operated sampler valve with revers

Wells – Valves – closures or changeable restrictors – Destructible element

Gravel pack apparatus

Wells – Valves – closures or changeable restrictors – Destructible element

Gravel pack apparatus

Wells – Valves – closures or changeable restrictors – Destructible element

Hydraulic control fluid communication nipple

Wells – Valves – closures or changeable restrictors – Destructible element

Hydraulically actuated control fluid communication nipple

Wells – Valves – closures or changeable restrictors – Destructible element

Hydraulically controlled safety valves for incorporation in prod

Wells – Valves – closures or changeable restrictors – Destructible element

Isolation valve with frangible flapper element

Wells – Valves – closures or changeable restrictors – Destructible element

Low actuation pressure bar vent

Wells – Valves – closures or changeable restrictors – Destructible element

Method and apparatus for wellbore fluid treatment

Wells – Valves – closures or changeable restrictors – Destructible element

Method and apparatus for wellbore fluid treatment

Wells – Valves – closures or changeable restrictors – Destructible element

Multi-use tubing disconnect

Wells – Valves – closures or changeable restrictors – Destructible element

Oil well standing valve

Wells – Valves – closures or changeable restrictors – Destructible element

Packer deflate subassembly for an inflatable packer system

Wells – Valves – closures or changeable restrictors – Destructible element

PDF valve

Wells – Valves – closures or changeable restrictors – Destructible element

Plug for operating a downhole device using tubing pressure