发明授权
- 专利标题： Variable frequency temperature limited heaters
- 专利标题（中）： 变频温度限制加热器
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申请号： US10693700申请日： 2003-10-24
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公开(公告)号： US08224163B2公开(公告)日： 2012-07-17
- 发明人: Chester Ledlie Sandberg , Harold J. Vinegar , Christopher Kelvin Harris , Jaime Santos Son , Fredrick Gordon Carl, Jr.
- 申请人： Chester Ledlie Sandberg , Harold J. Vinegar , Christopher Kelvin Harris , Jaime Santos Son , Fredrick Gordon Carl, Jr.
- 申请人地址： US TX Houston
- 专利权人： Shell Oil Company
- 当前专利权人： Shell Oil Company
- 当前专利权人地址： US TX Houston
- 主分类号： E21B36/04
- IPC分类号： E21B36/04 ; E21B36/00
摘要：
A heater system may include an alternating current supply and an electrical conductor. Alternating current may be applied to one or more electrical conductors at a frequency between about 100 Hz and about 1000 Hz. The electrical conductors may be located in a formation. The electrical conductors may resistively heat upon application of the alternating electrical current. At least one of the electrical conductors may include an electrically resistive ferromagnetic material. The electrical conductor may provide a reduced amount of heat above or near a selected temperature. Heat may transfer from the electrical conductor to a part of formation.
公开/授权文献
- US20050006097A1 Variable frequency temperature limited heaters 公开/授权日：2005-01-13