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Title: Heating systems for heating subsurface formations

Methods and systems for heating a subsurface formation are described herein. A heating system for a subsurface formation includes a sealed conduit positioned in an opening in the formation and a heat source. The sealed conduit includes a heat transfer fluid. The heat source provides heat to a portion of the sealed conduit to change phase of the heat transfer fluid from a liquid to a vapor. The vapor in the sealed conduit rises in the sealed conduit, condenses to transfer heat to the formation and returns to the conduit portion as a liquid.
Authors:
 [1] ;  [2]
  1. Houston, TX
  2. Bellaire, TX
Publication Date:
OSTI Identifier:
1016684
Report Number(s):
7,931,086
US Patent Application 12/106,060
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Research Org:
Shell Oil Company (Houston, TX)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING