LandOfFree - US Patents - Listing for Boring or penetrating the earth,Bit or bit element,Bit with leading portion forming smaller diameter initial bore

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Down-the-hole drill tool for drilling in advance of a casing tub

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Downhole hammer assembly

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill apparatus having a primary drill and a pilot drill

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill bit and system for drilling a borehole

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill bit for drilling along an arcuate path

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill bit for drilling along arcuate path

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill bit porting system

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill bit with gage definition region

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill for rock

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drill head assembly

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling and anchoring device for diverse applications

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling and/or chiseling tool

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling bit for blast furnace tap holes

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling tool

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling tool especially for the rotary percussion drilling...

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling tool for percussive and rotary drilling

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling unit with hollow annular drill bit and central drill

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drillout bi-center bit