LandOfFree - US Patents - Listing for Boring or penetrating the earth,Bit or bit element,Rolling cutter bit or rolling cutter bit element

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

Hole opener with multisized, replaceable arms and cutters

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

Hole reamer

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

Horizontal boring apparatus and method of using the same

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

Hybrid drill bit and method of drilling

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

Hybrid drill bit with fixed cutters as the sole cutting...

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

Hybrid drill bit with secondary backup cutters positioned...

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

Hybrid rock bit

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

Hydraulic action for rotary drill bits

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

Hydro-lifter rock bit with PDC inserts

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

Hydro-lifter rock bit with PDC inserts

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

Hydro-lifter rock bit with PDC inserts

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

Hydrodynamic lubricant seal for drill bits

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

Hydromechanical drilling device

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

Hydrostatic bearing

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

Impregnated diamond cutting structures

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

Impregnated diamond cutting structures

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

Impregnated diamond drill bit

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

In or relating to rotary drill bits

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

Inclined chisel inserts for rock bits