Producing fluids from subterranean formations through...

Details Producing fluids from subterranean formations through... Producing fluids from subterranean formations through...

E - Fixed Constructions

21

B

E21B 43/14 (2006.01) E21B 7/04 (2006.01) E21B 7/06 (2006.01) E21B 29/06 (2006.01)

Patent

CA 2249729

Method and apparatus for producing fluids from a production zone(s) by drilling and completing multiple laterals from a primary wellbore. One or more pre-formed window units are provided in a casing string before it is cemented in the well. Each unit is comprised of a housing having an inlet and two outlets, one of which forms the pre-formed window. The axes of the two outlets forms a relatively small angle (e.g. 1' to 10', preferably 3°) whereby a well string will follow a gently curved path as it exits through the window. A re-entry line from the surface can be attached to the housing so that a work-over string can be lowered into a selective lateral without having to shut-in production from the other laterals.

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