4. Boring or penetrating the earth
  5. Means traveling with tool to constrain tool to bore along...
  6. Axially spaced opposed bore wall engaging guides

Volker Peters

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Downhole cutting mill

Boring or penetrating the earth – With receptacle – Sieve or strainer
Reexamination Certificate

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Downlink pulser for mud pulse telemetry

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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Drilling apparatus with motor-driven pump steering control

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Reexamination Certificate

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Hydraulically balanced reciprocating pulser valve for mud...

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

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Oscillating shear valve for mud pulse telemetry

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Measuring or indicating drilling fluid rate of flow
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2306913

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