4. Measuring and testing
  5. Borehole or drilling
  6. Pressure measurement

Robert Wayne Sundquist

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Apparatus and method for measuring formation pressure using...

Measuring and testing – Borehole or drilling – Pressure measurement
Reexamination Certificate

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Coring bit with uncoupled sleeve

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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Profile ID: LFUS-PAI-P-2791662

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