A matrix drill bit and method of manufacturing a matrix bit body from a composite of matrix materials is disclosed. Two or more different types of matrix materials may be used to form a composite matrix bit body. A first matrix material may be selected to provide optimum fracture resistance (toughness) and optimum erosion, abrasion and wear resistance for portions of a matrix bit body such as cutter sockets, cutting structures, blades, junk slots and other portions of the bit body associated with engaging and removing formation materials. A second matrix material may be selected to provide desired infiltration of hot, liquid binder material with the first matrix material to form a solid, coherent, composite matrix bit body.
RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Patent Application entitled "MATRIX DRILL BITS AND METHOD OF MANUFACTURE," application Ser. No. 60/671,272 filed Apr. 14, 2005.
