| US 7,513,320 B2 | ||
| Cemented carbide inserts for earth-boring bits | ||
| Prakash K. Mirchandani, Hampton Cove, Ala. (US); and Alfred J. Mosco, Spring, Tex. (US) | ||
| Assigned to TDY Industries, Inc., Pittsburgh, Pa. (US) | ||
| Filed on Dec. 16, 2004, as Appl. No. 11/13,842. | ||
| Prior Publication US 2006/0131081 A1, Jun. 22, 2006 | ||
| Int. Cl. E21B 10/00 (2006.01) | ||
| U.S. Cl. 175—426 [175/432] | 28 Claims |
| 1. A cutting insert for an earth-boring drill bit, comprising:
a body zone comprising a conventional first cemented carbide; and
a cutting zone comprising a hybrid cemented carbide comprising particles of a second cemented carbide dispersed throughout
a continuous phase of a third cemented carbide.
|