4. Rotary expansible chamber devices
  5. Unlike helical surfaces on relatively wobbling rotating...

Richard D. Bottos

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Drill string telemetry system and method

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

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Drilling fluid flow diverter

Boring or penetrating the earth – Automatic control
Reexamination Certificate

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Internally profiled stator tube

Rotary expansible chamber devices – Unlike helical surfaces on relatively wobbling rotating...
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Method of making an internally profiled stator tube

Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
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Profile ID: LFUS-PAI-P-2130526

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