Invention Grant
- Patent Title: Temperature limited heater utilizing non-ferromagnetic conductor
- Patent Title (中): 采用非铁磁导体的限温加热器
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Application No.: US11409565Application Date: 2006-04-21
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Publication No.: US08224165B2Publication Date: 2012-07-17
- Inventor: Harold J. Vinegar , Christopher Kelvin Harris
- Applicant: Harold J. Vinegar , Christopher Kelvin Harris
- Applicant Address: US TX Houston
- Assignee: Shell Oil Company
- Current Assignee: Shell Oil Company
- Current Assignee Address: US TX Houston
- Main IPC: E21B36/04
- IPC: E21B36/04 ; E21B36/00
Abstract:
A heater is described. The heater includes a ferromagnetic conductor and an electrical conductor electrically coupled to the ferromagnetic conductor. The ferromagnetic conductor is positioned relative to the electrical conductor such that an electromagnetic field produced by time-varying current flow in the ferromagnetic conductor confines a majority of the flow of the electrical current to the electrical conductor at temperatures below or near a selected temperature.
Public/Granted literature
- US20080217321A1 Temperature limited heater utilizing non-ferromagnetic conductor Public/Granted day:2008-09-11
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