Title: Adjusting alloy compositions for selected properties in temperature limited heaters

Abstract

Heaters for treating a subsurface formation are described herein. Such heaters can be obtained by using the systems and methods described herein. The heater includes a heater section including iron, cobalt, and carbon. The heater section has a Curie temperature less than a phase transformation temperature. The Curie temperature is at least 740.degree. C. The heater section provides, when time varying current is applied to the heater section, an electrical resistance.

Inventors:

Brady, Michael Patrick ^[1]; Horton, Jr., Joseph Arno ^[1]; Vitek, John Michael ^[1]

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+ Show Inventor Affiliations

1. Oak Ridge, TN

Issue Date:

Tue Mar 23 00:00:00 EDT 2010

Research Org.:

Shell Oil Company (Houston, TX)

Sponsoring Org.:

USDOE

OSTI Identifier:

1014462

Patent Number(s):

7683296

Application Number:

U S Patent Application 11/788,860

Assignee:

Shell Oil Company (Houston, TX)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

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B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

B32B1/08 - Tubular products
B32B15/013 - {one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium}
B32B15/015 - {the said other metal being copper or nickel or an alloy thereof}
B32B2307/202 - Conductive
B32B2307/208 - Magnetic, paramagnetic
B32B9/002 - {comprising natural stone or artificial stone}
B32B9/045 - {of synthetic resin}

C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

C21D2211/001 - Austenite
C21D2211/004 - Dispersions
C21D2211/005 - Ferrite
C21D6/002 - {containing Cr
C21D6/007 - {containing Co}

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

C22C38/02 - containing silicon
C22C38/04 - containing manganese
C22C38/10 - containing cobalt
C22C38/12 - containing tungsten, tantalum, molybdenum, vanadium, or niobium
C22C38/14 - containing titanium or zirconium
C22C38/24 - with vanadium
C22C38/28 - with titanium or zirconium
C22C38/30 - with cobalt

E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING

E21B36/04 - using electrical heaters
E21B43/2401 - {by means of electricity}

G - PHYSICS G05 - CONTROLLING G05F - SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

G05F1/10 - Regulating voltage or current

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S166/902 - for inhibiting corrosion or coating

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DOE Contract Number:  

AC05-00OR22725

Resource Type:

Patent

Country of Publication:

United States

Language:

English