4. Boring or penetrating the earth
  5. Bit or bit element
  6. With fluid conduit lining or element
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Adjustable nozzle

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

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Apparatus for drilling a horizontal controlled borehole in the e

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Apparatus for establishing hydraulic flow regime in drill bits

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Archimedes spiral drill bit

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

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Assembly for drilling low pressure formation

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Reexamination Certificate

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Auto-coupling tool for drill-pipes

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

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