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

Eastman Christensen

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Device for remote transmission of information

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Patent

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Drag bit for drilling in plastic formation with maximum chip cle

Boring or penetrating the earth – Processes – Boring with specific fluid
Patent

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Nozzle retention system for a drill bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Universal mud pulse telemetry system

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Patent

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Profile ID: LFUS-PAI-P-173459

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