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

Boring or penetrating the earth – Boring with explosion in inaccessible hole – Independent firing of plural charges

Explosively actuated well tool having improved disarmed configur

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft

Extendable bit

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

Extended drill bit nozzle having extended retainer

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

Extended drill bit nozzle having side discharge ports

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

Extended nozzle and bit stabilizer and method of producing

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

Extended reach drilling method

Boring or penetrating the earth – Processes

Extended reach drilling system

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Extended soil sampling head

Boring or penetrating the earth – Ice boring

Extendible shank auger

Boring or penetrating the earth – Processes – Boring horizontal bores

Extending the lateral portion of a short-radius wellbore

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Axially spaced opposed bore wall engaging guides

Extension and retraction mechanism for subsurface drilling equip

Boring or penetrating the earth – With means movable relative to tool below ground to stop... – With longitudinally spaced valve seats

Extension drilling system

Boring or penetrating the earth – With above-ground cleaner for boring means

External pipe wiping apparatus and method of pulling and wiping

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid head on tool shaft having lateral port and axial...

External water delivery system for rock drills

Boring or penetrating the earth – With means movable relative to tool below ground to stop... – With undisturbed core receiver

Externally powered core catcher

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Externally vented drive head with solid center

Boring or penetrating the earth – Processes – Boring with specific fluid

Extrusion of bentonite clay for fluid loss reduction in drilling