TWO-CONE DRILL BIT WITH ENHANCED STABILITY

摘要

A two-cone drill bit that exhibits improved stability. In one embodiment, th e two-cone drill bit has a first and a second roller cone arranged to have a cone separation angle between about 145 degrees and about 166 degrees. In some embodiments, the two-cone drill bit has a plurality of cutting elements arranged on the roller cones such that a botto m hole coverage greater than about 17 percent is achieved per revolution of the two-cone dri ll bit.