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

Safety mechanism for weight-set downhole tool

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

Safety sleeve for a borehole communicating with an underground r

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

Safety valve apparatus and method

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

Safety valve closure system

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

Safety valve for oil wells

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

Safety valve for use in an injection well

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

Safety valve landing nipple and method

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

Safety valve lock out system and method

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

Sand release apparatus and method

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

Sand screen with active flow control and associated method...

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

Screw operated emergency relief and safety valve

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

Seal assembly for a safety valve

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

Selective direct and reverse circulation check valve...

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

Selective downhole operating system and method

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

Selective hydraulic lock-out well safety valve and method

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

Shape memory alloy actuation

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

Shifting apparatus and method

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

Slickline power control interface

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

Sliding sleeve valve and method for assembly