Abstract: A process of forming a nozzle for discharging a fluid comprising locating in an upright position, a tubular conduit having internal threads formed on the inside thereof at opposite ends. A core having a conical shaped end is located within the conduit such that it extends out of the conduit, and is spaced from the inside wall of the conduit down to the threads at the lower end of the conduit. The conical shaped end of the core and the conduit are surrounded with a mold having its inside wall spaced from the conical shaped end of the core. The space between the inside wall of the conduit and the core is filled with a liquid material. The liquid material is allowed to harden to form an elastic member molded within the conduit. The mold and core are removed and a portion of the elastic member extending beyond the conduit is severed to form a discharge opening.

Abstract: A nozzle comprising an elastic member molded in a conduit having oppositely disposed threads at opposite ends. The elastic member embeds all of the threads at the down stream end, a portion of the threads at the up stream end and extends out of the down stream end defining a discharge end. An aperture extends through the elastic member and is conical shaped at the discharge end thereof.

Abstract: A system for mixing fluids such as drilling fluids and which comprises an elongated container having a cylindrical shaped bottom. A suction conduit has an inlet in fluid communication with the interior of the container at about its central axis for withdrawing fluid from the container. An exterior conduit extends along the length of the container and has a plurality of spaced apart injection conduits extending into the container for injecting fluid therein in a direction to cause the fluid to swirl around the central axis of the container. A pump has its inlet coupled to the suction conduit and its outlet coupled to one end of the exterior conduit to cause the fluid in the container to spiral inward for flow through the suction conduit and to be pumped into the exterior conduit for injection through the injection conduits back into the container. An air bleed is provided for removing air from the interior of the container near its axis.