Patent ID: 7066288
Filing Date: 2006-06-27
Classification: E21B

Abstract:
1. An earth boring bit, comprising: a bit body, having at least one depending bit leg; a rotatable cone mounted to the leg; a heel row of compacts and an adjacent row of compacts on the cone, the heel row extending to a full gage of the cone, and the adjacent row being located next to the heel row and extending to less than full gage of the cone, each of the heel row and adjacent row compacts having a cylindrical barrel that is interferingly pressed into a mating hole in the cone and a cutting end that protrudes from the cone, the cutting end being symmetrical about a cutting end axis, each of the barrels having a barrel axis; the cutting end axis for at least some of the heel row and adjacent row compacts extending at an obtuse angle relative to its barrel axis; and wherein: the barrel axis of each of the compacts in the heel row is at a lesser angle relative to the bit axis than the barrel axis of each of the compacts in the adjacent row.