Design and numerical simulation for a novel low flow rate nozzle

For the zonal injection of low permeability reservoirs with low layer flow allocation and large layer pressure difference, conventional nozzle has the problem of small flowing area and it is difficult to allocate layer injection. A novel type of low flow rate nozzle was designed, based on the design parameters of the current water nozzle, such as shape, size, and pressure bearing capacity. The water nozzle increases the frictional loss through increasing flow length, changing the direction of flowing medium and expanding cross-section area. So with the novel water nozzle, under the same throttling effect, it not only satisfies with the requirement of low flow rate, but also greatly expands the open area. Numerical simulation was conducted for the pressure loss characteristics of the novel low flow rate nozzle and conventional nozzle by using FLUENT software, and the results showed that the flow area of the novel low flow rate nozzle is larger than that of conventional nozzles with equal throttling effect. Therefore the zonal injection was carried out under large layer pressure difference.