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

Apparatuses and methods for deploying logging tools and...

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

Assembly for reducing the force applied to a slot and lug guide

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

Automatic tubing filler

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

Balance line safety valve with tubing pressure assist

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

Balance line safety valve with tubing pressure assist

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

Balanced line tubing retrievable safety valve

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

Ball seat having ball support member

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

Ball seat with controlled releasing pressure and method setting

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

Ballistically compatible backpressure valve

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

Bearing mounted ball valve and method of use

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

Bi-directional ball seat system and method

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

Bi-directional ball seat system and method

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

Bladder-type sampling pump controller

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

Blow out protector valve employing ball baffle assembly for...

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

Casing bore receptacle with fluid check valve

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

Casing filling and circulating apparatus and method

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

Cemented open hole selective fracing system

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

Circulating valve apparatus and drill stem test method allowing

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

Circulating valve responsive to fluid flow rate therethrough and