| US 7,600,590 B2 | ||
| Low projection inserts for rock bits | ||
| Floyd C. Felderhoff, Montgomery, Tex. (US); Brian A. Baker, Shenandoah, Tex. (US); Rudolf C. Pessier, The Woodlands, Tex. (US); and Jimmy W. Eason, The Woodlands, Tex. (US) | ||
| Assigned to Baker Hughes Incorporated, Houston, Tex. (US) | ||
| Filed on Aug. 15, 2005, as Appl. No. 11/204,063. | ||
| Prior Publication US 2007/0034415 A1, Feb. 15, 2007 | ||
| Int. Cl. E21B 10/16 (2006.01) | ||
| U.S. Cl. 175—432 [175/431] | 17 Claims |
| 1. An earth boring bit having at least one rotatable cone, comprising:
an outer row of inserts mounted in an interference fit within holes formed in an outer annular land bordering a gage surface
of the cone;
each of the inserts having a cylindrical barrel and a cutting end protruding therefrom;
each of the holes having a cylindrical sidewall, the sidewall having a minimum depth measured at all points around a circumference
of the hole that is greater than a length of the barrel of the insert mounted therein; wherein
an intersection of the cutting end with the barrel is recessed a selected distance within the hole such that the sidewall
completely surrounds the intersection; and
the minimum depth of the sidewall is about 0.080 inch or more greater than the length of the barrel of each of the inserts.
|