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Lubrication and self-cleaning system for expansion mandrel

Wells – Processes – Assembling well part
Reexamination Certificate

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Lubricator

Wells – With below and above ground modification – Head for tool – piston or cleaner
Reexamination Certificate

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Lubricator corrosion inhibitor treatment

Wells – With below and above ground modification – Head for tool – piston or cleaner
Patent

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Lubricator for moving well equipment through flow conductor

Wells – Above ground apparatus – With assembly or disassembly means
Patent

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Lubricator for underbalanced drilling

Wells – With below and above ground modification – Head for tool – piston or cleaner
Reexamination Certificate

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Lubricator for underbalanced drilling

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

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Lubricator for use with coiled tubing apparatus and...

Wells – Above ground apparatus – Moving tubing or cable into an existing well
Reexamination Certificate

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Lubricator valve apparatus

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Lubricator valve with rotational flip-flap arm

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

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