EROSION RESISTANT FLOW NOZZLE FOR DOWNHOLE TOOL

摘要

An erosion resistant nozzle is brazed to the surface of a tubular, such as a shunt tube of a wellscreen apparatus, for use in a wellbore. The nozzle is elongated and defines an aperture for communicating exiting flow from the tubular's port. The lead end of the nozzle disposed downstream of the exiting flow can be lengthened to prevent erosion to the tubular. The lead endwall of the nozzle's aperture can be angled relative to the nozzle's length and can be rounded. The nozzle can be composed of an erosion resistant material or can be composed of a conventional material having an erosion resistant coating or plating thereon. Being elongated with a low height, the nozzle can have a low profile on the tubular, and the aperture's elongating can be increased or decreased to increase or decrease the flow area through the nozzle.