Shielded Multi-Pair Arrangement as Supply Line to an Inductive Heating Loop in Heavy Oil Deposits

Patent metadata

Field	Value
Publication number	US-2015275636-A1
Application number	US-201314441474-A
Country	US
Kind code	A1
Filing date	Oct 24, 2013
Priority date	Nov 7, 2012
Publication date	Oct 1, 2015
Grant date	—

Abstract

The invention relates to an arrangement of a plurality of electrical conductor pairs ( 3 ) for symmetrical supplying of a consumer, in particular of a capacitively compensated conductor loop for inductively heating deposits of substances comprising hydrocarbons, such as oil sand, bitumen, heavy oil, natural gas, shale gas, and a shield pipe ( 4 ) enclosing the substances, wherein supply ( 1 ) and return ( 2 ) lines of the conductor pairs ( 3 ) are alternatingly concentrically and/or uniformly distributed within the shield pipe ( 4 ) enclosing the plurality of conductor pairs ( 3 ). The eddy currents occurring in the shield pipe ( 4 ) and the consequential losses are thus minimized.

First claim

1 . An arrangement of a plurality of electrical conductor pairs ( 3 ) for symmetrical supplying of a capacitively compensated conductor loop for induction heating and a shield pipe ( 4 ) enclosing them, wherein
supply ( 1 ) and return ( 2 ) lines of the conductor pairs ( 3 ) are alternatingly concentrically and/or uniformly distributed within the shield pipe ( 4 ) enclosing the plurality of conductor pairs ( 3 ) and the supply ( 1 ) and return ( 2 ) lines each has a circular sector-shaped cross-section.

2 . The arrangement as claimed in claim 1 , characterized in that the cross-section of the conductor is hollow.

3 . The arrangement as claimed in claim 1 or 2 , characterized in that insulation acting as a dielectric between the supply and return lines ( 1 , 2 ) is plastic or ceramic or a fluid.

4 . The arrangement as claimed in one of claims 1 to 3 , characterized in that supporting rings ( 5 ) can be provided at predetermined intervals for support and or guidance of the conductors ( 1 , 2 ) or conductor pairs ( 3 ) in the shield pipe ( 4 ).

5 . The arrangement as claimed in one of claims 1 to 4 , characterized in that the conductors ( 1 , 2 ) or conductor pairs ( 3 ) in the shield pipe ( 4 ) are arranged in the form of a helix.

6 . The arrangement as claimed in one of claims 1 to 5 , characterized in that the conductors ( 1 , 2 ) and/or the shield pipe ( 4 ) are made of a diamagnetic or paramagnetic material.

7 . The arrangement as claimed in one of claims 1 to 6 , characterized in that the shield pipe ( 4 ) is designed concentrically in multiple layers.

8 . The arrangement as claimed in claim 7 , characterized in that an external layer of the shield pipe ( 4 ) is an insulation layer.

Assignees

• Siemens Ag

Inventors

• Diehl Dirk

Classifications

• H05B6/10

  Induction heating apparatus, other than furnaces, for specific applications · CPC title

• E21B43/2401 Primary

  by means of electricity · CPC title

• H01B9/06

  Gas-pressure cables; Oil-pressure cables; Cables for use in conduits under fluid pressure · CPC title

• E21B36/04 Primary

  using electrical heaters · CPC title