4. Boring or penetrating the earth
  5. Below-ground impact members
  6. Resiliently biased

Timothy R. Heemstra

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Methods of detecting and measuring in-situ elastic anisotropy in

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Tubular spring slip-joint and jar

Boring or penetrating the earth – Below-ground impact members – Resiliently biased
Patent

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Profile ID: LFUS-PAI-P-80037

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