of ports 24 are arranged along the length of the tube 16 providing fluid communication between the production tube 16 and the annulus 20 an end packer 26 is illustrated in fig1 as defining the terminus for the cylinder 18 it should be understood however that any seals are acceptable such as an o ring bore seal while the device 10 is illustrated as a discrete device inserted as part of the production tubing string it can be appreciated that the cylinder 18 and annulus 20 could be defined by setting a packer at each end of a casing section to encompass the tube 16 and valves 21 22 during normal operation fig1 most of the production fluid flows from the esp through tube 16 but at least part of the fluid within the tube 16 exits the tube 16 through the ports 24 into the annulus the fluid streams from within the tube 16 and annulus 20 recombine in the region of the top of the tube 16 proximate check valve 21 to flow up the production tubing in fig2 5 the same components as fig1 are generally illustrated at various stages of the well operation in fig2 the esp is off and production fluid flow has ceased therefore particles such as sand 30 settles downward in the annulus 20 the check valves 21 if utilized 22 are closed and movement of the sand entrained in the fluid is illustrated by the down arrows check valve 21 prevents particle flow into the tube 16 particles 30 tends to build up in the annulus 20 near the lower check valve 22 but does not appreciably flow into the tube 16 through the ports 24 the design and orientation of the ports.