Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2008-07-01
2008-07-01
Gay, Jennifer H (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
C277S336000
Reexamination Certificate
active
07392862
ABSTRACT:
An earth boring bit has a bit body with a depending bearing pin. An insert ring is mounted on the bearing pin. The insert ring has an inner diameter greater than an outer diameter of the bearing pin, defining a clearance between the insert ring and the bearing pin to allow the insert ring to float relative to an axis of the bearing pin. An inner seal is in sealing engagement with the bearing pin and the inner diameter of the insert ring. A cone is rotatably mounted on the bearing pin, the cone having a cavity containing an outer seal groove. An outer seal located in the outer seal groove is in dynamic sealing engagement with an outer diameter of the insert ring. An anti-rotation member engages a portion of the insert ring to prevent rotation of the insert ring.
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Koltermann Terry J.
McCormick Ronny D.
Nguyen Don Q.
Veasey Michael Joseph
Zahradnik Anton F.
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Gay Jennifer H
Stephenson Daniel P
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