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US 2008/0164748 A1Published application
Degradation Assembly
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Ronald Crockett, Jeff Jepson
Life of this patent
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Abstract
A degradation assembly comprises a rotating portion and a fixed portion. The rotating portion comprises a wear resistant tip bonded to a carbide bolster. The bolster is attached to a shaft adapted for a rotatable connection within a bore of the fixed portion. The fixed portion is adapted for a rigid connection to a driving mechanism. The fixed portion also comprises an o-ring slot formed within its bore and an o-ring being disposed within the bore. The o-ring is at least 15 percent compressed such that the o-ring resists rotation of the shaft.
Claims19
A degradation assembly comprising:
- a rotating portion and a fixed portion;
- the rotating portion comprising a wear resistant tip bonded to a carbide bolster, the bolster being attached to a shaft adapted for rotatable connection within a bore of the fixed portion;
- the fixed portion being adapted for rigid connection to a driving mechanism;
- and
- the fixed portion comprising a mechanism adapted to substantially resist the rotation of the shaft
2 more elements
Dependencies are inferred from the claim text.