E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/43
E21B 21/00 (2006.01) E21B 34/12 (2006.01) E21B 37/00 (2006.01) E21B 43/12 (2006.01) E21B 43/14 (2006.01)
Patent
CA 1302233
ABSTRACT A threaded sleeve valve to facilitate the removal of water from gas wells having two or more gas productive zones disposed vertically along their bore. The valve is adapted to form a connection between a segregation packer and a well tubing string. In use, the valve and the segregation packer are sunk in the well to a position intermediate an upper gas productive zone and a lower gas productive zone. During normal gas production, the valve is closed and gas is collected from both zones, the gas from the lower zone passing through a vertical passage defined by the valve and continuous with the interior of the well tubing. Incidental water accumulated above the segregation packer can be removed by opening the valve and using the gas pressure of the lower productive zone to force the accumulated water upwards to the wellhead and out of the well. Once the well bore has been purged of incidental water, the valve is re-closed and normal production resumes. The valve is operated from the surface by turning the well tubing string in the required direction.
569610
Borden Ladner Gervais Llp
Wagg Marketing Ltd.
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