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Adapter for oil well tubings

Wells – Conduit wall or specific conduit end structure – Plural – parallel – nonconcentric conduits
Patent

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Alternate path multilayer production/injection

Wells – Conduit wall or specific conduit end structure
Reexamination Certificate

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Annular gas trap

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Annular pressure relief collar

Wells – Conduit wall or specific conduit end structure
Reexamination Certificate

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Anti-rotation device for cementing plugs with deformable periphe

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Anti-rotation device for use with well tools

Wells – Conduit wall or specific conduit end structure
Reexamination Certificate

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Apparatus and system to allow tool passage ahead of a bit

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Reexamination Certificate

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Apparatus comprising expandable bistable tubulars and...

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Reexamination Certificate

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Apparatus for absorbing shock

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Apparatus for centralizing pipe in a wellbore

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Apparatus for interconnecting continuous tubing strings...

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Reexamination Certificate

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Apparatus for reducing abrasion and corrosion in mandrels

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Apparatus for releasably coupling two elements

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Reexamination Certificate

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Apparatus for treating formations using alternate flowpaths

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Apparatus in a drill string

Wells – Conduit wall or specific conduit end structure – Flexible tube or cable
Reexamination Certificate

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Borehole drill pipe continuous side entry or exit apparatus and

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Borehole drill pipe continuous side entry or exit apparatus and

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Borehole pipe side entry method and apparatus

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Bottom hole assembly with coiled tubing insert

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Reexamination Certificate

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Built-in grout line for a well casing

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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