Insulated conductor temperature limited heater for subsurface heating coupled in a three-phase WYE configuration
- Bellaire, TX
- Palo Alto, CA
A heating system for a subsurface formation is described. The heating system includes a first heater, a second heater, and a third heater placed in an opening in the subsurface formation. Each heater includes: an electrical conductor; an insulation layer at least partially surrounding the electrical conductor; and an electrically conductive sheath at least partially surrounding the insulation layer. The electrical conductor is electrically coupled to the sheath at a lower end portion of the heater. The lower end portion is the portion of the heater distal from a surface of the opening. The first heater, the second heater, and the third heater are electrically coupled at the lower end portions of the heaters. The first heater, the second heater, and the third heater are configured to be electrically coupled in a three-phase wye configuration.
- Research Organization:
- Shell Oil Company (Houston, TX)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- Assignee:
- Shell Oil Company (Houston, TX)
- Patent Number(s):
- 7,831,133
- Application Number:
- US Patent Application 11/409,523
- OSTI ID:
- 1014919
- Country of Publication:
- United States
- Language:
- English
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