Abstract: An atomizing nozzle (20) configured to convert a fluid (88) into a mist (92) for use in a misting system is provided. The atomizing nozzle (20) has a nozzle body (22) encompassing a cylindrical occluder chamber (50), a substantially spherical occluder (26) residing within the occluder chamber (50), and an orifice insert (24) affixed to an outlet end (44) of the atomizing nozzle (20). The orifice insert (24) encompasses an insert chamber (74) contiguous with the occluder chamber (50) and having a conical chamber bevel (76) proximate an outlet end (78) of the insert chamber (74), and has a mating surface (82) configured to mate with the occluder (26). The mating surface (82) has at least one flow-control groove (86) configured to control the flow of the fluid (88) through the atomizing nozzle (20).

Abstract: A nozzle insert for a rotary rock bit has an orifice with a generally circular central region and a plurality of angularly spaced, non-circular outer regions around the periphery thereof so that flow of mud through each outer region develops a vortex pattern that increases entrainment of rock particles to prevent bit balling, and decreases overbalance pressure to enhance rate of penetration.

Abstract: A rotary drill bit (10) has a jet pump device including a plurality of jet pump assemblies (26). Each jet pump assembly (26) has an outer housing (28) secured to the bit body (14) and receiving any elongate nozzle member (46) therein in concentric relation to form an annular chamber (48) therein. A flow restriction (38) is mounted within the outer housing (28) above the nozzle member (46). The elongate nozzle member (46) has a lower nozzle port (50) and an opposed upper nozzle port (52). Drilling fluid from the central bore (20) is directed to the nozzle member (46) where the drilling fluid is divided into two streams, one stream for flow through lower nozzle port (50) against the formation and the outer stream for flow through the upper nozzle port (52) and flow restriction (38) to create a low pressure area or suction in an annular chamber (48). A low pressure cross sectional area is formed at the bottom of the bore hole (B, FIG.