Patent · US Active

Insulated conductor heaters with semiconductor layers

US8939207B2 · kind B2 · utility

7Cited by

383References

20Claims

0Family size

Assignee

SHELL OIL COMPNY · US

Inventors

Edward Everett de St. Remey · Anchorage, US
Valerio Giuliani · Calgary, CA
Christopher Harris · Täby, SE

Key dates

Filing date	Apr 8, 2011
Grant date	Jan 27, 2015
Priority date	—
Expiry date	Jan 1, 2033

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B43/2401
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A heater used to heat a subsurface formation includes an electrical conductor, a semiconductor layer at least partially surrounding the electrical conductor, an insulation layer at least partially surrounding the electrical conductor, an electrically conductive sheath at least partially surrounding the insulation layer. The heater may be located in an opening in the subsurface formation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.