4. Boring or penetrating the earth
  5. Cutter element laterally shiftable below ground
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Wedge activated underreamer

Boring or penetrating the earth – Cutter element laterally shiftable below ground
Reexamination Certificate

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Well bore enlarger

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Patent

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Well notching tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by relatively longitudinally movable...
Patent

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Well reamer

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Patent

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Wellbore cutting tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Patent

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Wellbore section milling

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Patent

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