07860377 is referenced by 112 patents and cites 981 patents.

A system for heating a subsurface formation is described. The system includes a first elongated heater in a first opening in the formation. The first elongated heater includes an exposed metal section in a portion of the first opening. The portion is below a layer of the formation to be heated. The exposed metal section is exposed to the formation. A second elongated heater is in a second opening in the formation. The second opening connects to the first opening at or near the portion of the first opening below the layer to be heated. At least a portion of an exposed metal section of the second elongated heater is electrically coupled to at least a portion of the exposed metal section of the first elongated heater in the portion of the first opening below the layer to be heated.

Title
Subsurface connection methods for subsurface heaters
Application Number
11/409559
Publication Number
7860377 (B2)
Application Date
April 21, 2006
Publication Date
December 28, 2010
Inventor
Frederick Gordon Carl Jr
Houston
TX, US
Thomas Joseph Keltner
Spring
TX, US
George Leo Stegemeier
Houston
TX, US
Stanley Leroy Mason
Allen
TX, US
Dong Sub Kim
Sugar Land
TX, US
Ronald Marshall Bass
Houston
TX, US
Harold J Vinegar
Bellaire
TX, US
Assignee
Shell Oil Company
TX, US
IPC
H05B 3/02
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