LandOfFree - US Patents - Listing for Boring or penetrating the earth

Boring or penetrating the earth – With below-ground tool drive prime mover – Below-ground storage of motivating energy

Turbine drill for drilling at great depths

Boring or penetrating the earth – With above-ground means to feed tool

Turbine pump ring for drilling heads

Boring or penetrating the earth – Processes – Boring curved or redirected bores

Turbine tool

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

Turbo-coring device equipped with a following pipe

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

Turbodrill

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

Turbodrill with a reduced drilling fluid pressure on a floating

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

Turbodrill with asymmetric stator and rotor vanes

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

Turbodrills

Boring or penetrating the earth – With above-ground guide for relatively advancing tool

Turret for roof bolting apparatus

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion

Twist drill

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Twist drill

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion

Twist drill

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Twist drill bit for rock drilling

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion

Twist-drill bit

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

Two cone bit with extended diamond cutters

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

Two cone bit with non-opposite cones

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

Two cone bit with non-opposite cones

Boring or penetrating the earth – With tool shaft detail

Two piece down hole drill chuck

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...

Two solenoid guide system for horizontal boreholes