Patents Assigned to 374928 Alberta Limited
  • Patent number: 4823880
    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.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: April 25, 1989
    Assignee: 374928 Alberta Limited
    Inventor: Wayne Klatt