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Three-dimensional well system for accessing subterranean zones

  • US 7,090,009 B2
  • Filed: 02/14/2005
  • Issued: 08/15/2006
  • Est. Priority Date: 09/12/2002
  • Status: Expired due to Fees
First Claim
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1. A method for accessing a subterranean zone from a surface, comprising:

  • forming an entry well from a surface; and

    forming two or more exterior drainage wells from the entry well to the subterranean zone, the exterior drainage wells each extending at least outward from the entry well for a first distance and then at least downward for a second distance, and at least two of the exterior drainage wells operable to drain fluid from the subterranean zone.

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