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

Wells – Valves – closures or changeable restrictors – Destructible element

Actuating ball

Wells – Valves – closures or changeable restrictors – Destructible element

Annulus pressure operated closure valve with improved power mand

Wells – Valves – closures or changeable restrictors – Destructible element

Annulus pressure operated downhole choke and associated methods

Wells – Valves – closures or changeable restrictors – Destructible element

Apparatus for cementing a casing string

Wells – Valves – closures or changeable restrictors – Destructible element

Apparatus for controlling fluid flow in a conduit wall

Wells – Valves – closures or changeable restrictors – Destructible element

Bleedoff tool for well test system

Wells – Valves – closures or changeable restrictors – Destructible element

Bulged single-hinged scored rupture having a non-circular...

Wells – Valves – closures or changeable restrictors – Destructible element

Bypass valve

Wells – Valves – closures or changeable restrictors – Destructible element

Bypass valve closing means

Wells – Valves – closures or changeable restrictors – Destructible element

Cementing staging tool

Wells – Valves – closures or changeable restrictors – Destructible element

Check valve assembly

Wells – Valves – closures or changeable restrictors – Destructible element

Check valve for fluid-producing wells

Wells – Valves – closures or changeable restrictors – Destructible element

Circulating and pressure equalizing sub

Wells – Valves – closures or changeable restrictors – Destructible element

Circulating kill valve

Wells – Valves – closures or changeable restrictors – Destructible element

Circulating valve

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 – Destructible element

Control fluid communication nipple

Wells – Valves – closures or changeable restrictors – Destructible element

Delayed opening ball seat