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O-ring seal for rock bit bearings

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

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O-ring seal for rock bit bearings

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

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Oil well drilling bit

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

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One cone rotary drill bit featuring enhanced grooves

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

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Optimal material pair for metal face seal in earth-boring bits

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

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Optimized central PDC cutter and method

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

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Optimized earth boring seal means

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

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