open axial passage of the downhole valve assembly 810 and continue to flow through the axial passage of the production tubing 822 towards the surface in the event that the downhole valve assembly 810 fails to open and remains closed regardless of further attempts to open the downhole valve assembly 810 the bypass valve assembly 812 can be used to facilitate a diversion of production fluid flow past the failed valve assembly 810 in the illustrated example the bypass valve 812 is located below the obstruction created by the closed valve 810 as illustrated in fig8 and fig9 fluid pressure 831 applied via the annulus activates the internal mechanism of the annulus bypass valve 812 such that the annulus bypass valve 812 is actuated and opened and creates annulus flow as indicated by arrows 832 in a region downhole of the downhole valve assembly 810 the bypass valve assembly 812 facilitates diverting the production flow 826 through the open ports 880 in the body of the annulus bypass valve 812 to create annulus flow 832 that allows the flow of production fluid to continue uphole via the annulus region around the obstruction created by the closed downhole valve 810 in the illustrated example a packer is omitted from the tubing mounted completion assembly 800 and as such annulus flow 832 can.