Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Xueying Xie0
David Scott Miller0
Harold J. Vinegar0
Jean Charles Ginestra0
Date of Patent
July 26, 2011
Patent Application Number
11409562
Date Filed
April 21, 2006
Patent Primary Examiner
Patent abstract
A system for heating a subsurface formation is described. The system includes an elongated heater in an opening in the formation. The elongated heater includes two or more portions along the length of the heater that have different power outputs. At least one portion of the elongated heater includes at least one temperature limited portion with at least one selected temperature at which the portion provides a reduced heat output. The heater is configured to provide heat to the formation with the different power outputs. The heater is configured so that the heater heats one or more portions of the formation at one or more selected heating rates.
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