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

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

Downhole drill bit cone with uninterrupted refractory coating

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 – Plural separable cutter elements

Downhole milling tool and cutter therefor

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

Downhole shearers

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

Drag bit

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drag bit

Boring or penetrating the earth – Bit or bit element – Cutting edge self-renewable during operation

Drag bit and cutters

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drag bit and cutters

Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device

Drag bit with steel shank and tandem gage pads

Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device

Drag bit with utility blades

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

Drag bits with dropping tendencies and methods for making...

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drag blade bit with diamond cutting elements

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drag drill bit having improved arrangement of cutting elements

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drag drill bit having improved flow of drilling fluid

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drag type drill bit

Boring or penetrating the earth – Bit or bit element – Forked rotary nontracking

Drag-bit drilling with multi-axial tooth inserts

Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device

Drag-type casing mill/drill bit

Boring or penetrating the earth – Bit or bit element – Specific or diverse material

Drag-type rotary drill bit

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

Drag-type rotary drill bit