IMPREGNATED ROTARY BIT WITH HIGH DENSITY MONOBLOCK CENTER STRUCTURE

摘要

A drill bit includes a bit body having an end face for engaging a rock formation. The end face is defined by a HIP pressed center structure formed of a metal matrix impregnated with super abrasive particles. The HIP pressed center structure includes a central region located at a center axis of said drill bit and finger regions extending radially from the central region. The end face is further defined by infiltrated ribs formed of a metal matrix impregnated with super abrasive particles. Certain ones of the infiltrated ribs are configured to form radial extensions from the finger regions of the HIP pressed center structure.

主权项

1. A drill bit, comprising:
a bit body; a plurality of ribs extending from the bit body and formed of a first metal matrix impregnated with super abrasive particles; and a monoblock center structure extending from the bit body and formed of a second metal matrix impregnated with super abrasive particles, said monoblock center structure having a central region located at a center axis of said drill bit and a plurality of finger regions extending radially from said central region, each finger region radially aligned with a corresponding one of said plurality of ribs; wherein said second metal matrix impregnated with super abrasive particles is different than the first metal matrix impregnated with super abrasive particles.