4. Boring or penetrating the earth
  5. Processes
  6. Sampling of earth formations

Thuy Bui

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Casing bore receptacle with fluid check valve

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

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Downhole core barrel flushing system

Boring or penetrating the earth – Processes – Sampling of earth formations
Patent

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Hydrostatic referenced safety-circulating valve

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

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Latch for well tool

Wells – Expansible anchor or casing – Expansible means translated by wedge or cam
Patent

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Well bore wall cleaner

Wells – Packers or plugs – With expanding anchor
Patent

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Profile ID: LFUS-PAI-P-845308

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