Method of casing off a producing formation in a well

Details Method of casing off a producing formation in a well Method of casing off a producing formation in a well

E - Fixed Constructions

21

B

166/19

E21B 33/00 (2006.01) E21B 33/14 (2006.01) E21B 43/10 (2006.01)

Patent

CA 1320434

ABSTRACT The method of casing off a producing formation in a well includes drilling into the producing formation and reaming the borehole in the producing formation zone. Then the producing formation is shut off with a fluid-impervious envelope of profile pipes which are reamed in the process of their setting by building up a pressure drop across them. Then the flow casing string is run into the well and cemented, followed by re- exposing the producing formation. The running-in of the flow casing string is terminated upon its having entered the upper part of the fluid-impervious envelope.

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