The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2012
Filed:
Oct. 24, 2003
Chester Ledlie Sandberg, Palo Alto, CA (US);
Harold J. Vinegar, Bellaire, TX (US);
Christopher Kelvin Harris, Houston, TX (US);
Jaime Santos Son, Houston, TX (US);
Fredrick Gordon Carl, Jr., Houston, TX (US);
Chester Ledlie Sandberg, Palo Alto, CA (US);
Harold J. Vinegar, Bellaire, TX (US);
Christopher Kelvin Harris, Houston, TX (US);
Jaime Santos Son, Houston, TX (US);
Fredrick Gordon Carl, Jr., Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
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.