US Patent 12006787 Delayed opening fluid communication valve

A casing valve is disclosed that includes a first component configured to connect to a casing string, a second component configured to connect to the casing string, a mandrel disposed between the first component and the second component, the mandrel having a plurality of ports, a housing disposed outside of the mandrel, the housing having a plurality of ports, a piston disposed between the mandrel and the housing and configured to move in a first direction from a first position that forms a barrier between the ports of the mandrel and the ports of the housing to a second position that is adjacent to the ports of the mandrel and the ports of the housing and a dissolvable component configured to restrain the piston in the first position and to dissolve when exposed to a fluid to release the piston.