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

Lubricator for underbalanced drilling

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

Lubricator valve with rotational flip-flap arm

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

Manual port closing tool for well cementing

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

Method & apparatus for actuating a downhole tool

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

Method and apparatus for causing pressure variations in a...

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

Method and apparatus for controlling a well

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

Method and apparatus for flushing a well

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

Method and apparatus for formation isolation in a well

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

Method and apparatus for locking out a subsurface safety valve

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

Method and apparatus for opening downhole flapper valves

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

Method and apparatus for positioning and repositioning a plurali

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

Method and apparatus for preventing fluid runovers from a well

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

Method and apparatus for production using a pressure...

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

Method and apparatus for reduction of control lines to...

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

Method and apparatus for relieving pressure

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

Method and apparatus of locking closed a subsurface safety syste

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

Method and apparatus to selectively reduce wellbore pressure...

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

Method and device for downhole flow rate control

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

Method and device for pressure controlled sequential operation