Two cone drill bit having four nozzles

摘要

A two-cone drill bit includes four or more nozzles 26A, 26B that direct fluid to perform one or more of the following: cleaning roller cones, impinging on a hole bottom, or inducing a helical flow field. The two-cone drill bit may have a bit body formed from two leg sections 12, fig 9A, where the leg sections 12, fig 9A may be disposed 145 to 180 degrees from each other.