providing fuel, via a fuel conduit, to a plurality of oxidizers coupled in series in an opening in the formation, wherein an oxidizer that first receives {HEAD ~ fuel} from {TAIL ~ the fuel conduit} is a first oxidizer 
from
providing fuel , via a fuel conduit , to a plurality of oxidizers coupled in series in an opening in the formation , wherein an oxidizer that first receives { HEAD ~ fuel } from { TAIL ~ the fuel conduit } is a first oxidizer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH