Method and apparatus for stage cementing a liner in a well bore having a casing
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United States of America Patent
Stats
-
Aug 8, 1989
Grant Date -
N/A
app pub date -
Aug 1, 1988
filing date -
Aug 1, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a method and apparatus for cementing a liner in a well bore having a casing wherein the liner is connected to a running tool and includes hanger means for securing the liner to the casing in the well bore. The liner includes an upper and lower liner portion each having port means therein and means to lock the telescoping liner portions against relative longitudinal movement to prevent premature actuation or operation of the port means. The liner portions provide a mechanically actuated port arrangement to be employed with first and second liner wiper means and first and second pump down plug means for cementing above a packer on the lower liner portion, or for providing dual stage cementing.
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