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

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

Radial cut drill bit insert

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 – Specific or diverse material

Randomly-oriented composite constructions

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

Randomly-oriented composite constructions

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

Reamer bit for raise boring

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

Reamer shoe

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

Reamer wing for enlarging a borehole below a smaller-diameter po

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

Reamer with stabilizers for use in a wellbore

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

Reamer-stabilizer

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

Reaming apparatus

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

Reaming apparatus and method with ability to drill out...

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

Reaming apparatus and method with enhanced structural...

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

Reaming apparatus for well drilling