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

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

Hole coring system

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

Hole opener

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

Hole opener assembly and a cone arm forming a part thereof

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

Hole opener for the top hole section of oil/gas wells

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

Hole opener with improved rotary cutter mounting

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

Hole opener with multisized, replaceable arms and cutters

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

Hole reamer

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

Hollow auger head assembly

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion

Hollow auger head assembly

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

Hollow drill bit

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

Horizontal boring apparatus and method of using the same

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

Hybrid diamond insert platform locator and retention method

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

Hybrid drill bit and method of drilling

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

Hybrid drill bit with fixed cutters as the sole cutting...

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

Hybrid drill bit with secondary backup cutters positioned...

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

Hybrid rock bit

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

Hybrid rock bit

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

Hydraulic action for rotary drill bits

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

Hydraulic breaking hammer