g 70 a and can have a narrower portion 206 for fitting more snuggly against the base pipe 39 s outer surface the back edge of the end ring 200 at this narrower portion 106 also defines several channels 208 fluid flow passing through the wire 74 on the accompanying screen section 70 a can flow along the base pipe 60 between the longitudinal rods 72 when reaching the end ring 200 the flow can pass through the ring 39 s channels 208 and pass out the end of the ring 200 when this end ring 200 is abutting and joined to another like end ring 200 at weld 220 the flow can pass into the channels 208 of this other end ring 200 to communicate with the longitudinal space between the rods 72 of the adjoining screen section e g 70 b to align the channels 208 on abutting ends of the rings 200 the outer surface may be machined with a guide 209 or the like as best shown in fig5 a although shown formed uniformly around the inside of the end ring 200 other less symmetrical arrangements of the channels 208 may be used and the communicating channels 208 between abutting end rings 200 can cross communicate in any desirable pattern according to the implementation although two of these end rings 200 can abut one another as shown an integrally formed end ring can have two ends to achieve the same results for example fig7 shows an integral end ring 200 u2032 with channels 208 disposed on the base pipe 60 between adjoining screen sections 70 a and 70 b as further shown in the example of fig7 the perforations 62 in the base pipe 60 can be arranged in.