초록 ▼

A non-plugging nozzle and self-cleaning drilling tool incorporating the nozzle is provided. The nozzle has a body that defines a central passageway extending axially from the top to the bottom of the body. The central passageway defines an inlet orifice at the top and an exit orifice at the bottom.

A non-plugging nozzle and self-cleaning drilling tool incorporating the nozzle is provided. The nozzle has a body that defines a central passageway extending axially from the top to the bottom of the body. The central passageway defines an inlet orifice at the top and an exit orifice at the bottom. A side passageway extends through the side wall of the nozzle and communicates with a cylindrical portion of the central passageway, the intersection of which defines a side inlet orifice that is substantially square. Because the intersection is substantially square, particles may not become trapped within the nozzle and plug the side passageway. When incorporated into a drilling tool, particularly a polycrystalline diamond compact (PDC) bit, the drilling tool becomes self cleaning. The side passageway of the nozzle is directed at the voids formed in the cutting face of the drilling tool creating a cross flow through the voids and preventing accumulation and balling therein.

대표청구항 ▼

[ I claim:] [1.] A non-plugging nozzle, comprising:a body having a top, a bottom, and an axis, the body defining a central passageway extending therethrough from the top to the bottom in an axial direction so that the body has a side wall;the central passageway defining an inlet aperture at the top

[ I claim:] [1.] A non-plugging nozzle, comprising:a body having a top, a bottom, and an axis, the body defining a central passageway extending therethrough from the top to the bottom in an axial direction so that the body has a side wall;the central passageway defining an inlet aperture at the top of the body, an exit aperture at the bottom of the body, and a cylindrical portion;the body also defining a side passageway extending through the side wall intermediate the top and bottom of the body, the side passageway in flow communication with the central passageway and intersecting the cylindrical portion; anda side inlet orifice formed at the intersection of the side passageway and the central passageway, the side inlet orifice substantially squared to prevent plugging of the nozzle;an attachment mechanism wherein said body being removeably attached to a drill bit.