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Apparatus for installing a liner within a well bore

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Casing inflation packer

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Cementing plug

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Cementing plug

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Cementing plug

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Coiled tubing inflatable packer with circulating port

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Downhole valve

Wells – Packers or plugs – With controllable passage between central chamber and space...
Reexamination Certificate

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Drillable inflatable packer and methods of use

Wells – Packers or plugs – With controllable passage between central chamber and space...
Reexamination Certificate

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Dual bore well treating tool

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Hydraulically actuated downhole valve apparatus

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Multiple stage cementer and casing inflation packer

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Oil well perforation testing device

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Packer actuated vent assembly

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Plugging apparatus for a gravel packer

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Pressure apportioning valve apparatus for use with multiple pack

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Testing drill packer

Wells – Packers or plugs – With controllable passage between central chamber and space...
Reexamination Certificate

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Well valve

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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