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Device for cutting undercuts

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Patent

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Drill bit with set of underreamer arms

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Patent

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Drilling device for drilling and reaming of a hole

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Reexamination Certificate

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Expandable well drilling tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Patent

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Fastener, hammering jig for installing the fastener, and...

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Reexamination Certificate

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Reverse circulation drilling system with bit locked underreamer

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Patent

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Reverse circulation drilling system with bit locked...

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Reexamination Certificate

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Reverse circulation drilling system with bit locked...

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Reexamination Certificate

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Seismic shothole reaming module

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Reexamination Certificate

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Underreamer having splined torque transmitting connection betwee

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...
Patent

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