4. Boring or penetrating the earth
  5. Boring without earth removal
  6. Combined with earth removal

Marco Brignoli

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Core sampling method and core sampler therefor

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent

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Device for measuring the permeability of rock fragments

Measuring and testing – With fluid pressure – Porosity or permeability
Patent

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Drilling fluids comprising oil emulsions in water

Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate

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Water-based drilling fluid containing anions with a high...

Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1150285

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