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

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Oil well standing valve

Wells – Valves – closures or changeable restrictors – Destructible element

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Oil well testing apparatus

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Oil well testing safety valve

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Oil well testing string bypass valve

Wells – Valves – closures or changeable restrictors

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Oil well testing valve with liquid spring

Wells – Valves – closures or changeable restrictors

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Oil-well flap-type safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Oil-well safety-valve and tool for installing the same

Wells – Valves – closures or changeable restrictors – Fluid operated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Oilwell tubing tester with trapped valve seal

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

One trip flow tube exercising tool

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

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

One trip flow tube exercising tool

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

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Open barrel cage

Wells – Valves – closures or changeable restrictors – Fluid operated

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Open hole pipe recovery circulation valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Open hole pipe recovery circulation valve

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Orifice well safety valve with release mechanism

Wells – Valves – closures or changeable restrictors – Fluid operated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

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