(under subclass 305.1) A process in which fluid leaves the well to enter pores in the earth and fluid also enters the well from pores in the earth, the zones of departure from and entry into the well being spaced from each other.
(1) Note. The spacing of zones is often effected by a packer. A single group of holes in a well conduit is considered a single zone.
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257, for a process involving injecting fluid into the earth while producing fluid from the earth by in situ combustion from the same well.
