Downhole flow reversal apparatus

Details Downhole flow reversal apparatus Downhole flow reversal apparatus

E - Fixed Constructions

21

B

E21B 43/40 (2006.01) E21B 43/00 (2006.01) F04B 47/06 (2006.01)

Patent

CA 2663725

A water reinjection arrangement for a coal bed methane well to minimize water disposal problems at the well surface. Water is withdrawn by a motor driven pump from an upper coal seam through openings in the upper portion of the well casing. A flow reversing head is provided within the well casing and into which the withdrawn water is directed. The water flow direction is reversed by about 1800 and is conveyed within the well casing through tubular conduits to a downstream flow collector and into a downflow pipe, to be injected into a lower seam through openings in a lower portion of the well casing wall. A sealing arrangement is provided within the well casing to seal off the upper coal seam from the lower seam.

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