(under subclass 265) A process including using a plurality of wells, at least one of which receives a fluid for insertion into the pores of the earth and another of which conveys a fluid from the pores of the earth to the surface of the earth.
(1) Note. The line between this subclass and the various classes relating to separation of fluids is that the positive recitation in a claim of the step of placing a fluid in a well causes classification in this subclass.
(2) Note. See subclass 265 for search notes on classes concerned with fluid separations.
