Converging diverging nozzle for earth-boring drill bits, method of substantially bifurcating a drilling fluid flowing therethrough, and drill bits so equipped

摘要

A nozzle for use on a rotary drill bit for forming a subterranean borehole includes a body and at least one passageway extending through the body from an inlet to an exit aperture. The passageway has a converging region and a diverging region. At least a portion of the diverging region of the fluid passageway is substantially bifurcated. A rotary drill bit for forming a borehole in a subterranean formation includes at least one such nozzle installed within a body of the bit and configured for communicating drilling fluid to a face of the body. A method of communicating fluid to a face of a drill bit includes introducing fluid into a passageway, causing the fluid to flow through a converging region, causing the drilling fluid to flow through a diverging region, and substantially bifurcating the drilling fluid at least within a portion of the diverging region.