4. Boring or penetrating the earth
  5. With signaling, indicating, testing or measuring
  6. Providing identifiable indication of core position in situ...

Volker Krueger

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Active controlled bottomhole pressure system & method

Boring or penetrating the earth – Processes
Reexamination Certificate

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Active controlled bottomhole pressure system and method with...

Boring or penetrating the earth – Processes
Reexamination Certificate

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Apparatus and method for formation testing while drilling...

Measuring and testing – Borehole or drilling – During drilling
Reexamination Certificate

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Apparatus and method for formation testing while drilling...

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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Apparatus and method for formation testing while drilling...

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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