Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2011-06-07
2011-06-07
Neuder, William P (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S374000
Reexamination Certificate
active
07954569
ABSTRACT:
The present invention relates to compositions and methods for forming a bit body for an earth-boring bit. The bit body may comprise hard particles, wherein the hard particles comprise at least one of carbide, nitride, boride, and oxide and solid solutions thereof, and a binder binding together the hard particles. The binder may comprise at least one metal selected from cobalt, nickel, and iron, and, optionally, at least one melting point reducing constituent selected from a transition metal carbide in the range of 30 to 60 weight percent, boron up to 10 weight percent, silicon up to 20 weight percent, chromium up to 20 weight percent, and manganese up to 25 weight percent, wherein the weight percentages are based on the total weight of the binder. In addition, the hard particles may comprise at least one of (i) cast carbide (WC+W2C) particles, (ii) transition metal carbide particles selected from the carbides of titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten, and (iii) sintered cemented carbide particles.
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Caldwell Steven G.
Collins Gabriel B.
Eason Jimmy W.
Mirchandani Prakash K.
Mosco Alfred J.
Baker Hughes Incorporated
Neuder William P
TDY Industries, Inc.
TraskBritt
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