Commingling flow between transport tubes of a multi transport tube shunt system

A open hole shunted gravel pack screen system 48 comprises a commingler 58 positioned along a plurality of transport tubes 50 at a location separate from a manifold 56. The commingler 58 has an internal chamber 60 where gravel slurry received from uphole transport tube sections 62 (of a plurality of transport tubes 50) is commingled before flowing into downhole transport tube sections 64 (of the plurality of transport tubes 50). The internal chamber 60 is placed in fluid communication with uphole transport tube sections 62 via inlets 66 and with downhole transport tube sections 64 via outlets 68. The internal chamber 60 provides a cavity for bringing together flow of gravel slurry from the two or more transport tubes 50 and for mixing the gravel slurry flows before redistributing the gravel slurry downstream through the commingler outlets 68.