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

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

Excavation bit for a drilling apparatus

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

Excavation system and method employing adjustable down-hole...

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Pivoted about substantially longitudinal axis

Excavation tool

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements

Excavation tool

Boring or penetrating the earth – Bit or bit element – Impact or percussion type

Excavation tool

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Exhaust valve and bit assembly for down-hole percussive drills

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

Expandable and contractible rotary well drilling bit

Boring or penetrating the earth – Bit or bit element – Casing shoe type

Expandable apparatus for drift and reaming borehole

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

Expandable bit

Boring or penetrating the earth – Processes

Expandable bit with secondary release device

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Plural cutter elements longitudinally relative movable into...

Expandable drill bit

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

Expandable drill bit

Boring or penetrating the earth – Processes

Expandable drilling tool and method

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

Expandable earth boring apparatus using impregnated and...

Boring or penetrating the earth – Processes

Expandable eccentric reamer and method of use in drilling

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

Expandable gage bit for drilling and method of drilling

Boring or penetrating the earth – With tool shaft detail – Axially telescoping shaft section

Expandable milling head for gas well drilling

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

Expandable raise bit

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

Expandable ramp gripper