LandOfFree - US Patents - Listing for Boring or penetrating the earth,Cutter element laterally shiftable below ground

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

Boring devices

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

Boring tool for radial enlargement of a cylindrical foundation b

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

Cavern well completion method and apparatus

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

Collapsible cutterhead for drilling upward

Boring or penetrating the earth – Cutter element laterally shiftable below ground – With shifting mechanism spring biased to operative position

Collapsible rock head

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

Combination mill and drill bit

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

Combined drill and underreamer tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Plural selectively shiftable cutter elements

Concentric expandable reamer and method

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

Counterboring device for wells

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...

Device for cutting undercuts

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

Device for drilling an undercut in a borehole

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

Divided-bucket type rotary excavator

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

Downhole cutting tool

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

Downhole tool with extendable members

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

Downhole under-reamer tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Plural selectively shiftable cutter elements

Downhole unit for use in boreholes in a subsurface formation

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

Drill bit

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by cam or gear axially rotatable...

Drill bit with set of underreamer arms

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

Drill bit with yielding support and force applying structure for