LandOfFree - US Patents - Listing for Wells,Processes,Operating valve, closure, or changeable restrictor in a well

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Dual flapper valve assembly

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Dual hydraulic safety valve

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Dual valve well control in underbalanced wells

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Dynamic mudcap drilling and well control system

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Electro-hydraulically pressurized downhole valve actuator...

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Electronic completion installation valve

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Equalizer valve and associated method for sealing a fluid flow

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Equalizing blank valve apparatus and methods

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Expandable liner and associated methods of regulating fluid...

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Expandable shifting tool

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Extendable casing circulator and method

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Fail-safe well safety valve and method

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Failsafe safety valve and method

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Flapper gas lift valve

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Flow actuated valve for use in a wellbore

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Flow control and isolation in a wellbore

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Flow control apparatus

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Flow control apparatus and method for use of the same

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Flow control apparatus for use in a wellbore