LandOfFree - US Patents - Listing for Boring or penetrating the earth,With below-ground tool drive prime mover

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Activated earth drill

Boring or penetrating the earth – With below-ground tool drive prime mover – Plural below-ground drive prime movers

Patent

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Air-operated drilling machine or rotary-percussive action

Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall

Patent

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Annular air-hammer apparatus for drilling holes

Boring or penetrating the earth – With below-ground tool drive prime mover

Patent

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Annular drilling hammer

Boring or penetrating the earth – With below-ground tool drive prime mover

Patent

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Apparatus and method for a hydraulic diaphragm downhole mud...

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type

Reexamination Certificate

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Apparatus and process for drilling underground arcuate paths uti

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type

Patent

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Apparatus for applying pressure to fluid seals

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type

Patent

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Apparatus for drilling a curved borehole

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type

Patent

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Apparatus for drilling a curved borehole

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type

Patent

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Apparatus for drilling oil and gas wells and a torque arrestor a

Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall

Patent

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Apparatus for preventing separation of a down-hole motor from a

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type

Patent

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Apparatus for producing an upwardly directed drill hole

Boring or penetrating the earth – With below-ground tool drive prime mover – With below-ground feed means

Patent

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Apparatus for propulsion in elongated cavities

Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall

Reexamination Certificate

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Apparatus for reducing hydro-static pressure at the drill bit

Boring or penetrating the earth – With below-ground tool drive prime mover – With below-ground conveyer or impeller for removal of cuttings

Patent

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Apparatus for the removal of spoil when making trenches of great

Boring or penetrating the earth – With below-ground tool drive prime mover – With above-ground means

Patent

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Apparatus for transporting equipment through a conduit

Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall

Patent

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Articulated coupling for use with a downhole drilling apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type

Patent

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Articulated tool for drilling oil, gas geothermal wells

Boring or penetrating the earth – With below-ground tool drive prime mover – With positive connection between tool and support shaft for...

Patent

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