Drainhole well completion

Details Drainhole well completion Drainhole well completion

E - Fixed Constructions

21

B

166/19

E21B 17/00 (2006.01) E21B 33/124 (2006.01) E21B 33/13 (2006.01) E21B 33/14 (2006.01)

Patent

CA 1289867

ABSTRACT A method for completing a drainhole wellbore with casing but without conventional cementing of the casing where- in in the drainhole portion of the wellbore a casing string composed of alternating casing subs and external casing packer subs is employed, the external casing packer subs carrying an elastic member adapted to be expanded and form a seal between the exterior of the casing string and the wellbore wall, and one or more of the external casing packer subs is activated to expand the elastic member carried by same thereby providing for isolation of discreet segments of the casing string in the drainhole portion of the wellbore to allow for localized pro- duction and remedial treatments in the drainhole wellbore.

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