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Wellhead with non-ferromagnetic materials

United States Patent

7,533,719
May 19, 2009
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Wellheads for coupling to a heater located in a wellbore in a subsurface formation are described herein. At least one wellhead may include a heater located in a wellbore in a subsurface formation; and a wellhead coupled to the heater. The wellhead may be configured to electrically couple the heater to one or more surface electrical components. The wellhead may include at least one non-ferromagnetic material such that ferromagnetic effects are inhibited in the wellhead. Systems and methods for using such wellheads for treating a subsurface formation are described herein.
Hinson; Richard A. (Houston, TX), Vinegar; Harold J. (Bellaire, TX)
Shell Oil Company (Houston, TX)
11/ 788,870
20070289733
April 20, 2007
GOVERNMENT INTEREST The Government has certain rights in this invention pursuant to Agreement No. ERD-05-2516 between UT-Battelle, LLC, operating under prime contract No. DE-ACO5-00OR22725 for the US Department of Energy and Shell Exploration and Production Company. The Government has certain rights in the invention pursuant to Agreement No. SD 10634 between Sandia National Laboratories and Shell Exploration and Production Company.