Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating agent released in drilling fluid
Reexamination Certificate
2006-06-30
2008-12-16
Neuder, William P (Department: 3672)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating agent released in drilling fluid
C166S250120
Reexamination Certificate
active
07464771
ABSTRACT:
A downhole abrading tools has a body with a first end for connection with a rotating component of a drill string, and a cutting end for rotation in unison with the body, the cutting end having an abrading matrix containing an abrasive material for rotating engagement with an object within the well. The downhole abrading tool also includes a passage through the tool for circulating a drilling fluid. The abrading matrix includes at least one taggant embedded within the abrading matrix capable of being released by the abrading matrix into the downhole location due to wear on the abrasive material and transported to the surface location along with the drilling fluid for detection. When the taggant is released due to excessive wear, the taggant is carried from the downhole location in the well to the surface of the well where it can be detected by the operator of the tool.
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Baker Hughes Incorporated
Greenberg & Traurig, LLP
Matheny Anthony F.
Neuder William P
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