In the mother solution injection scheme, one polymer injection pump is installed on each well to enable tailored viscosities. The injection system avoids viscosity loss by injecting a high concentration polymer solution downstream of the choke valve. However, one drawback of this setup is that maintenance and energy demands are usually higher than for a valve-based scheme.
Generally, when using Typhonix Polymer Flooding Valve in the mother solution application, the one pump-per-well injection scheme is replaced with a larger central pumping station plus one low shear valve per well to control the polymer injection rate. In this case, the low shear valve has the same low shear performance as the positive displacement pumps. However, compared to the one-pump per-well scheme, the central pumping station and low share valves will result in significantly lower maintenance costs and an overall lower energy consumption.
The low shear performance of the mother solution valve was demonstrated in a pilot test in 2020 
. The valve was installed on an existing high concentration mother solution flow line in a polymer field in Europa. Results from the pilot test verified the low shear performance of the valve, with only 2.7% viscosity loss up to 20 bar.
The pilot test together with the prototype results prove that the concept is a robust and well-understood low shear valve design suitable for both diluted and mother solution applications. In all applications, the low shear valve has been found to be robust, intuitive, and easy to install and operate.