4. Measuring and testing
  5. Borehole or drilling
  6. During drilling

Chen-Kang David Chen

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Detecting and reducing bit whirl

Measuring and testing – Borehole or drilling – During drilling
Patent

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Expanded downhole screen systems and method

Wells – Processes – Assembling well part
Reexamination Certificate

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Integrated drilling dynamics system

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate

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Method and apparatus for a monodiameter wellbore,...

Wells – Processes – Assembling well part
Reexamination Certificate

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Method and apparatus for a monodiameter wellbore,...

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1473106

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