Method of casing off a producing formation in a well
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United States of America Patent
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-
Jul 16, 1991
Grant Date -
N/A
app pub date -
Aug 2, 1990
filing date -
Nov 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The method of casing off a producing formation in a well includes drilling into the producing formation (19) and reaming the borehole in the producing formation zone. Then the producing fomation (19) is shut off with a fluid-impervious envelope (14) of profile pipes reamed in the process of their setting by building up a pressure drop thereacross. Then the flow casing string (5) is run into the well and cemented, followed by re-exposing the producing formation (19). The running-in of the flow casing string (5) is terminated upon its having entered the upper part of the fluid-impervious envelope (14).
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