E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/29
E21B 43/28 (2006.01) E21B 41/00 (2006.01)
Patent
CA 1094946
METHOD AND APPARATUS FOR MIXING GASEOUS OXIDANT AND LIXIVIANT IN AN IN SITU LEACH OPERATION F-9457 Abstract of the Disclosure Method and apparatus for mixing a gaseous oxidant (e.g., oxygen) and a lixiviant (e.g., an aqueous carbonate solution) at a downhole location in a well before the oxygen- saturated lixiviant is injected into a formation to be leached. The invention involves establishing a mixing zone in the well by positioning an orifice plate in the well at the downhole location. Lixiviant as it is flowed down the well passes through a restrictive opening in the plate causing a substan- tial increase in the flow velocity of the lixiviant. At the same time, gaseous oxidant is supplied to a point adjacent the opening in the plate and due to the increased velocity of the lixiviant flowing through the orifice, the oxidant is trapped to form a gas pocket below the orifice. Lixiviant flows through the gas pocket and becomes saturated with the gaseous oxidant. -1-
310128
Espenscheid Wilton F.
Yan Tsoung-Yuan
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
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