Inductor for induction heating

Patent metadata

Field	Value
Publication number	US-10154546-B2
Application number	US-201415024081-A
Country	US
Kind code	B2
Filing date	Sep 12, 2014
Priority date	Sep 26, 2013
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

An inductor is provided for induction heating of deposits of oil sand, oil shale, or extra-heavy oil using current-carrying conductors, in which a partial discharge at interruptions in the conductors is avoided.

First claim

What is claimed is:

1. An inductor for inductive heating of deposits of oil sand, oil shale or extra-heavy oil using current-carrying conductors, the inductor comprising:
at least two areas, each having at least one first multifilament conductor and a second multifilament conductor,
a first type of connection of the two areas embodied such that:
the first multifilament conductor of the first area is coupled to the second multifilament conductor of the first area via a first capacitor,
the first multifilament conductor of the first and second area are connected in an electrically conducting manner, and
the second multifilament conductor of the second area is electrically coupled to the first multifilament conductor of the first area via a second capacitor,
wherein at least one of the first capacitor and the second capacitor comprises two electrodes defined by a merging of individual conductors of a multifilament conductor.

2. The inductor of claim 1 , further comprising a third area that is electrically connected to the second area via a second type of connection embodied such that:
the first multifilament conductor of the second area is electrically coupled to the second multifilament conductor of the second area via a further first capacitor,
the second multifilament conductor of the second and third area are connected in an electrically conducting manner, and
the first multifilament conductor of the third area is electrically coupled to the second multifilament conductor of the second area via a further second capacitor.

3. The inductor of claim 2 , comprising more than three areas, wherein the areas are alternately connected via a first type of connection and a second type of connection.

4. The inductor of claim 1 , wherein each of the first and second multifilament conductor comprises at least two conductors, wherein the conductors embody the filaments of the multifilament conductor.

5. The inductor of claim 1 , wherein the first and second multifilament conductors comprise a plurality of at least 1000 and at most 5000 conductors, wherein the conductors embody the filaments of the multifilament conductor.

6. The inductor of claim 4 , wherein the individual conductors of the multifilament conductors run substantially in parallel along a longitudinal axis of the inductor.

7. The inductor of claim 4 , wherein the individual conductors of the multifilament conductors embody an interlaced structure that extends along a longitudinal axis of the inductor.

8. The inductor of claim 1 , wherein the at least two multifilament conductors are capacitively coupled at least in the first area and the second area, such that a third capacitor is defined in the resulting coupling.

9. The inductor of claim 8 , wherein a total capacitance of the first and second capacitors is lower than a total capacitance of the third capacitors.

10. The inductor of claim 1 , wherein the electrodes are hemispherical.

11. The inductor of claim 10 , wherein a space between the two electrodes of at least one of the first capacitor and the second capacitor comprises a ceramic or mineralized insulating material.

12. The inductor of claim 11 , wherein the insulating material comprises at least one mica group mineral.

Assignees

• Siemens Ag

Inventors

• Diehl Dirk

Classifications

• H05B6/10 Primary

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

• E21B43/2408

  SAGD in combination with other methods · CPC title

• H05B2214/03

  Heating of hydrocarbons · CPC title

• E21B43/2401 Primary

  by means of electricity · CPC title

• H05B6/108

  for heating a fluid · CPC title