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:
Jun. 12, 2012
Filed:
Oct. 24, 2003
Harold J. Vinegar, Bellaire, TX (US);
Chester Ledlie Sandberg, Palo Aklto, CA (US);
Christopher Kelvin Harris, Houston, TX (US);
Jaime Santos Son, Houston, TX (US);
James Louis Menotti, Dickinson, TX (US);
Fredrick Gordon Carl, Jr., Houston, TX (US);
Harold J. Vinegar, Bellaire, TX (US);
Chester Ledlie Sandberg, Palo Aklto, CA (US);
Christopher Kelvin Harris, Houston, TX (US);
Jaime Santos Son, Houston, TX (US);
James Louis Menotti, Dickinson, TX (US);
Fredrick Gordon Carl, Jr., Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
Systems and methods are described for heating a subsurface formation. Alternating electrical current may be applied to one or more electrical conductors. The electrical conductors may be located in a subsurface 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. The electrical conductor may provide a reduced amount of heat above or near a selected temperature. Heat may be allowed to transfer from the electrical conductor to a part of the subsurface formation.