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

Seal insert ring for roller cone bits

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

Seal insert ring for roller cone bits

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

Seal protection for rock bits

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

Sealed bearing roller reamer

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

Sealing bearings in drill bits

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

Sealing between relatively rotating members in boring apparatus

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

Sealing system for a rotary rock bit

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

Secondary cutting structure

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

Sectional drive system

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

Self relieving seal

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

Self relieving seal

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

Self relieving seal

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

Self sharpening drag bit for sub-surface formation drilling

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

Self sharpening steel tooth cutting structure

Boring or penetrating the earth – Bit or bit element – Core forming type

Self-centering polycrystalline diamond cutting rock bit

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Self-drilling dowel with an inclined rolling head

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element

Self-excited drill bit sub

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

Self-lubricating elastomeric seal with polarized graphite

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

Self-penetrating drilling method and thrust-generating tool...