4. Boring or penetrating the earth
  5. With well-type screen

John B. Cheung

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Backwashing system for slurry pick-up used in hydraulic borehole

Boring or penetrating the earth – With well-type screen
Patent

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Fluid jet drilling nozzle and method

Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent

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Method and apparatus to remove structural concrete

Mining or in situ disintegration of hard material – Processes – Breaking down by direct contact with fluid
Patent

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Profile ID: LFUS-PAI-P-249082

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