Completions for well zone control

A system for increased control of steam injection for use in oil and gas recovery in a well, comprising:

• a plurality of controllable zones of injection disposed in the well, wherein the plurality of controllable zones include a primary conduit that houses a plurality of concentric conduits of decreasing diameter disposed inside of the primary conduit, wherein:
• each of the concentric conduits includes a proximal end and a distal end;
• the plurality of concentric conduits are fluidly sealed from one another from their respective proximal end to their distal end;
• and
• the primary conduit and the plurality of concentric conduits disposed inside of the primary conduit include a plurality of modular sections of conduit fluidly coupled with one another via compression couplings.