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:
Aug. 07, 2012
Filed:
Oct. 24, 2003
Chester Ledlie Sandberg, Palo Aklto, 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 Aklto, 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. An alternating current may be applied to one or more electrical conductors at a voltage above about 200 volts. The electrical conductors may be located in a formation. The electrical conductors may provide an electrically resistive heat output upon application of the alternating electrical current. At least one of the electrical conductors may include an electrically resistive ferromagnetic material. An electrical conductor may provide a reduced amount of heat above or near a selected temperature. Heat may be allowed to transfer from an electrical conductor to a part of the formation.