RICHTUNGSDÜSE FÜR EINEN BOHRMEISSEL

摘要

A nozzle assembly with a directional flow passage for directing and controlling the flow of drilling fluids exiting a drill bit. The assembly is threaded for engagement within a threaded receptacle in the drill bit. The assembly includes a nozzle body carried within an externally threaded sleeve structure that threads into the bit receptacle. Seating of the assembly anchors the nozzle body against rotational and axial movement. The external circumferential nozzle body surface and the internal circumferential sleeve surface mechanically interlock to permit the nozzle body to be positioned at selected different angular positions within the sleeve before seating the sleeve structure in the receptacle such that the final seated position of the assembly in the receptacle results in the desired orientation of the nozzle flow passage in the bit receptacle. The flow passage exit end of the nozzle is surrounded by a drive area that extends axially from the main nozzle body. A conventional socket drive tool engaging the drive area is employed to rotate the nozzle and surrounding threaded sleeve structure into or out of engagement with the threaded receptacle.