Three-dimensional well system for accessing subterranean zones

Details Three-dimensional well system for accessing subterranean zones Three-dimensional well system for accessing subterranean zones

E - Fixed Constructions

21

B

E21B 43/14 (2006.01) E21B 41/00 (2006.01) E21B 43/00 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2497303

A drainage system for accessing multiple subterranean zones (20A, 20B, 20C) from the surface includes an entry well (30) extending from the surface. The system also includes two or more exterior drainage wells (40) extending from the entry well through the subterranean zones. The exterior drainage wells each extend outwardly and downwardly from the entry well for a first selected distance and then extend downwardly in a substantially vertical orientation for a second selected distance.

L'invention concerne un système de drainage permettant d'accéder à plusieurs zones souterraines (20A, 20B, 20C), à partir de la surface. Ce système comprend un puits d'entrée (30) s'étendant à partir de la surface. Le système comprend également au moins deux puits de drainage extérieur (40) s'étendant à partir du puits d'entrée, à travers les zones souterraines. Les puits de drainage extérieur s'étendent chacun vers l'extérieur et vers le bas, à partir du puits d'entrée pour une première distance sélectionnée, puis s'étendent vers le bas dans une orientation sensiblement verticale, sur une seconde distance sélectionnée.

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