Roller cone drill bits with optimized bearing structures

Details Roller cone drill bits with optimized bearing structures Roller cone drill bits with optimized bearing structures

2008-04-22

2008-04-22

Tsay, Frank (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S040000

Reexamination Certificate

active

07360612

ABSTRACT:
A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a respective cutting structure with a minimal moment center located along each respective axis of rotation. Each respective bearing structure has a center point located proximate each respective minimal moment center.

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