APPARATUS FOR CREATION OF OXIDATION-SETTLEMENT ZONE OR REDUCTION ZONE IN WATER-BEARING FORMATION

摘要

FIELD: groundwater production. SUBSTANCE: invention aims at creating oxidation-settlement zone or reduction zone between several injection wells for production of purified water. In that zone, undesired substances are precipitated and their concentration lowered. In particular, oxygen, oxygen-containing gas, or oxygen source is first introduced into each two neighboring wells if creation of separate oxidation-settlement zone between two wells is desired, or oxygen-consuming substance is introduced into both neighboring wells if creation of reduction zone is desired. Thereafter, water is forced in one of injection wells in upward direction and simultaneously in the other well in downward direction so creating flow circuit in water-bearing formation between two wells. Each injection well has outside tube, which at least in its part filled with subterranean water is perforated and water-permeable. Near top end of outside tube, circulation vessel is mounted, from which first tube inside outside tube on one of its side is deviated and has its end at the level of the top part of water- bearing formation. A little higher, there is discharge branch pipe functioning as upper ejector. On the other side of outside tube, there is second tube with its lower end at the level of middle part of water-bearing formation or below. At this tube end, closing inflatable balloon is attached, which, when inflated, is tightly clasped to inner surface of outside tube. Immediately over the second tube, there is discharge branch pipe functioning as second ejector. Both discharge branch pipes and balloon are connected to one or several corresponding pressure sources. EFFECT: avoided formation of hard-to-remove deposits in ejectors. 5 cl, 2 dwg