4. Boring or penetrating the earth
  5. Cutter element laterally shiftable below ground
  6. Cutter element shifted by longitudinally relatively movable...

Security DBS NV/SA

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Bore hole underreamer

Wells – Processes – Distinct – separate injection and producing wells
Reexamination Certificate

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Bore hole underreamer having extendible cutting arms

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
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Reaming and stabilization tool and method for its use in a...

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

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Reaming and stabilization tool and method for its use in a...

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

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Underreaming and stabilizing tool and method for its use

Boring or penetrating the earth – Processes
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