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

Particle-matrix composite drill bits with hardfacing

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

PCD face seal for earth-boring bit

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

PCD face seal for earth-boring bit

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

PCD face seal for earth-boring bit

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

Polycrystalline diamond carbide composites

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

Polycrystalline diamond constructions having improved...

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

Polycrystalline diamond insert, drill bit including same,...

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

Polycrystalline diamond with improved abrasion resistance

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

Prevention of cone seal failures in rock bits

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

Protected cutter mounting for drill bits

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

Protector for rock bit seals

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

Radial force anti-extrusion device for sealed drill string unit

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

Raise bit with cutters stepped in a spiral and flywheel

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

Raise boring head having fluid traversing means

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

Raise drill bit inboard cutter assembly

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

Raise drill having water passages directed toward the roller cut

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

Raise drill with removable stem

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

Raise drill with replaceable stem

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

Reamer bit for raise boring