A system for accessing a subterranean zone from an entry well including an entry well extending from the surface. The entry well has a substantially vertical portion. A one or more drainage wells extend from the entry well to a subterranean zone. A one or more articulated wells extend from the entry well to the subterranean zone. At least one of the articulated wells intersects at least one of the one or more drainage wells at a junction proximate the subterranean zone. A drainage pattern is formed coupled to the junction and operable to conduct fluids from the subterranean zone to the junction.