Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2007-10-31
2010-06-08
Neuder, William P (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S434000, C076S108200
Reexamination Certificate
active
07730976
ABSTRACT:
A drill bit is provided that employs a plurality of discrete, post-like, abrasive, particulate-impregnated cutting structures extending upwardly from the bit face. The cutting structures may be disposed on abrasive, particulate-impregnated blades that also define a plurality of fluid passages on the bit face. One or more of the cutting structures may include outermost ends that exhibit a cross-sectional geometry that is elongated in a direction along a defined axis. The cutting structures may be oriented such that the defined axis is neither coplanar with, nor parallel to, an intended rotational path of the at least one discrete cutting structure during operation of the bit. In one embodiment, the cutting structure is oriented such that the defined axis is at an acute angle relative to a tangent of the intended rotational path for the associated cutting structure. Other or different features may include, for example, additional, differently configured cutting elements.
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McClain Eric E.
Skeem Marcus R.
Baker Hughes Incorporated
Neuder William P
TraskBritt
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