4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Craig R. Hyland

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Apparatus for recovering core samples at in situ conditions

Boring or penetrating the earth – With means movable relative to tool to receive – retain – or... – Core-retaining or severing means
Reexamination Certificate

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Apparatus for recovering core samples under pressure

Boring or penetrating the earth – With means movable relative to tool below ground to stop... – In sample receiver removable through below-ground tool shaft
Reexamination Certificate

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Apparatus for recovering core samples under pressure

Boring or penetrating the earth – With means movable relative to tool to receive – retain – or... – Receiver removable through below-ground tool shaft
Reexamination Certificate

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Automatic drill pipe inside wiper

Wells – Processes – Cleaning or unloading 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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Profile ID: LFUS-PAI-P-173457

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