Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2005-09-15
2008-08-19
Gay, Jennifer H (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
C175S372000, C277S379000, C277S380000, C277S396000
Reexamination Certificate
active
07413037
ABSTRACT:
A metal face seal for an earth boring drill bit where the drill bit has a bit body, at least one bit leg, a bearing pin on each bit leg, and a cone rotatably mounted on each bearing pin. The metal face seal is located in the cavity formed between the interior surface of the cone and the bearing pin. The metal face seal consists of a rigid seal ring having a forward surface that engages a rotating seal surface of the cone. An energizer ring biases the rigid seal ring toward the rotating seal surface. A secondary seal engages the bearing pin surface, the energizer ring, and the rigid seal ring. The secondary seal ring has a protuberance on its forward side for filling void spaces between the energizer ring, the rigid seal ring, and the secondary seal ring.
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Koltermann Terry J.
Lin Chih
Nguyen Don Quy
Ricks Gregory L.
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Deboer John M
Gay Jennifer H
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