Subsurface electrical heaters using nitride insulation

Details for Australian Patent Application No. 2005236490 (hide)

Owner Shell Internationale Research Maatschappij B.V.

Inventors Vinegar, Harold J.

Agent Davies Collison Cave

Pub. Number AU-B-2005236490

PCT Pub. Number WO2005/103445

Priority 60/565,077 23.04.04 US

Filing date 22 April 2005

Wipo publication date 3 November 2005

Acceptance publication date 29 January 2009

International Classifications

E21B 29/00 (2006.01) Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows

E21B 36/04 (2006.01) Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones

E21B 43/00 (2006.01) Obtaining fluids from wells

E21B 43/12 (2006.01) Obtaining fluids from wells - Methods or apparatus for controlling the flow of the obtained fluid to or in wells

E21B 43/24 (2006.01) Obtaining fluids from wells

E21B 43/30 (2006.01) Obtaining fluids from wells

E21B 43/38 (2006.01) Obtaining fluids from wells

H05B 3/10 (2006.01) Ohmic-resistance heating - Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor

H05B 3/14 (2006.01) Ohmic-resistance heating - the material being non-metallic

H05B 6/10 (2006.01) Heating by electric, magnetic, or electromagnetic fields - Induction heating apparatus, other than furnaces, for specific applications

Event Publications

14 December 2006 PCT application entered the National Phase

  PCT publication WO2005/103445 Priority application(s): WO2005/103445

2 August 2007 Assignment before Grant

  Shell Oil Company The application has been assigned to Shell Internationale Research Maatschappij B.V.

29 January 2009 Application Accepted

  Published as AU-B-2005236490

28 May 2009 Standard Patent Sealed

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