4. Boring or penetrating the earth
  5. Bit or bit element
  6. With fluid conduit lining or element
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Earth boring bit having a replaceable, threaded nozzle with wren

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

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Earth removal member with features for facilitating...

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Earth-boring drill bits with enhanced formation cuttings...

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

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Earth-boring drill bits with enhanced formation cuttings...

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Entrainment fluid channeling device for a down-hole drill...

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

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Erosion resistant fluid passageways and flow tubes for...

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

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Erosion resistant rock drill bit

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

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