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Rotary drill bit locking mechanism

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit seal

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with cutting elements having a thin abrasive fr

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent

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Rotary drill bit with hardfaced fluid passages and method of man

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

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Rotary drill bit with improved cutter

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with improved cutter and seal protection

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with improved cutter and seal protection

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with improved shirttail and seal protection

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with lip seal in roller cone bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate

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Rotary drill bit with nozzles designed to enhance hydraulic...

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate

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Rotary drill bit with rotary cutter

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with rotary cutters

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with rotary cutters

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary drill bit with strainer element

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

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Rotary drill bit, parts therefor, and method of manufacturing th

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rotary 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

Rotary drill bits

Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rotary drill bits

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rotary 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

Rotary drill bits

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

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