LandOfFree - US Patents - Listing for Wells,Valves, closures or changeable restrictors,Longitudinally movable operator

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Pressure equalization device for downhole tools

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Pressure equalizing plunger valve for downhole use

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Redundant hydraulic system for safety valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Relievable check valve assembly for oil wells and water wells

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Remotely operable top drive system safety valve having dual...

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Removable injection or production flow equalization valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Rod operated rotary well valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Safety valve having extension spring closure mechanism

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Safety valve with extension springs

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sampler and measurement apparatus

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sand control seal for subsurface safety valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Seal stack for sliding sleeve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Seal stack for sliding sleeve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sealing system for downhole well valves

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sleeve valve flow control device with locator shifter

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sliding sleeve assembly for subsurface flow control

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sliding sleeve casing tool

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sliding sleeve valve and seal ring for use therein

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Sliding sleeve with sleeve protection