Method for sealing the junctions in multilateral wells

Details Method for sealing the junctions in multilateral wells Method for sealing the junctions in multilateral wells

E - Fixed Constructions

21

B

E21B 29/06 (2006.01) E21B 7/06 (2006.01) E21B 7/08 (2006.01) E21B 23/12 (2006.01) E21B 41/00 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2212923

Junctions in multilateral well structures are sealed by employing a variety of degrees of premachined components and a variety of sealing embodiments, including casing segments having premachined windows, side pocket members which are adapted to reside within the string during run in and move laterally to the deployed position, woven members, cement filled ECPs, etc. Also disclosed is a downhole milling device which cuts a window in a casing segment or other material based upon a predetermined geometric pattern imposed upon the cutting tool by an integral template.

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