Canadian Patents Database / Patent 2812202 Summary

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(12) Patent: (11) CA 2812202
(54) English Title: METHOD AND SYSTEM FOR REMOVING MATURE FINE TAILINGS OF A DESIRED DENSITY FROM A TAILINGS POND
(54) French Title: PROCEDE ET APPAREIL DESTINE A EXTRAIRE DES RESIDUS FINS MATURES D'UNE DENSITE DESIREE D'UN BASSIN DE RESIDUS
(51) International Patent Classification (IPC):
  • B03B 9/02 (2006.01)
(72) Inventors (Country):
  • SVORCAN, RADE (Canada)
(73) Owners (Country):
  • TECHNIKA ENGINEERING LTD. (Canada)
(71) Applicants (Country):
  • SVORCAN, RADE (Canada)
(74) Agent: GOWLING WLG (CANADA) LLP
(45) Issued: 2016-02-16
(22) Filed Date: 2013-04-02
(41) Open to Public Inspection: 2014-02-11
Examination requested: 2013-10-16
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract

A method and a system for removal of Mature Fine Tailings (MFT) out of oilsands tailings ponds, specifically enabling year-round removal of MFT which density is greater than 1.35 t/m3. It utilizes a hollow, essentially fully enclosed around its perimeter, ideally of cylindrical form structure, (henceforth called the "structure") (5) of predetermined geometry, which is placed at the pond surface as shown in Figure 2. Water and less dense MFT initially located within the structure is moved outside the structure, while the MFT of required density which is surrounding the structure enters it under the action of hydrostatic pressure as per Figure 6. Continuous MFT removal operation is enabled due to simultaneous inflow of MFT surrounding the structure so that the hydrostatic equilibrium as per Formula 1 noted herein is maintained.


French Abstract

Un procédé et un système pour extraire des résidus fins matures de bassins de résidus de sables bitumineux, permettant plus précisément une extraction à longueur dannée de résidus fins matures dont la densité est supérieure à 1,35 t/m3. Il utilise une cavité, sensiblement complètement fermée autour de son périmètre, idéalement une structure de forme cylindrique (maintenant appelée la « structure ») (5) dune géométrie prédéterminée, laquelle est placée à la surface du bassin comme le montre la Figure 2. Leau et les résidus fins matures moins denses initialement situés à lintérieur de la structure sont déplacés à lextérieur de la structure, alors que les résidus fins matures de la densité requise qui entourent la structure y entrent sous laction de la pression hydrostatique comme le montre la Figure 6. Une opération dextraction continue de résidus fins matures est permise en raison du débit entrant simultané des résidus fins matures qui entourent la structure de sorte que léquilibre hydrostatique selon la Formule 1 notée ici est maintenu.


Note: Claims are shown in the official language in which they were submitted.

- 10 -
Claims
1. A method comprising:
selecting a desired density of mature fine tailings to be removed from an
oil sands tailings pond;
positioning a hollow conduit within the oil sands tailings pond such that a
bottom end of the hollow conduit is open to the mature fine tailings and
positioned to
receive the mature fine tailings of a desired density and such that a top end
of the
hollow conduit is open above a free water surface of the pond, wherein the
mature fine
tailings of the desired density fill the hollow conduit to a hydrostatically
equilibrating level
for balancing hydrostatic pressures inside the conduit with hydrostatic
pressures outside
the conduit; and
removing the mature fine tailings of the desired density from within the
hollow conduit.
2. The method of claim 1, further comprising adjusting a length of the
hollow conduit.
3. The method of claim 1, further comprising coupling deflector plates
to an outer surface of the hollow conduit.
4. The method of claim 1, further comprising coupling a buoyancy
element to the hollow conduit.
5. The method of claim 1, wherein selecting a desired density
comprises selecting a desired density greater than 1.35 t/m3.
6. The method of claim 1, wherein the hollow conduit is a hollow
cylindrical conduit.

- 11 -
7. The method of claim 1, wherein removing the mature fine tailings of
the desired density from within the hollow conduit comprises pumping the
mature fine
tailings of the desired density from within the hollow conduit.
8. The method of claim 1, wherein removing the mature fine tailings of
the desired density from within the hollow conduit comprises siphoning the
mature fine
tailings of the desired density from within the hollow conduit.
9. The method of claim 1, further comprising selecting a diameter of
the hollow conduit which allows an inflow of the mature fine tailings of the
desired
density into the hollow conduit to sustain a selected mature fine tailings
removal
capacity.
10. A system for removing mature fine tailings of a desired density from
a tailings pond, comprising:
a hollow conduit configured to be positioned within the pond such that a
bottom end of the hollow conduit is open to the mature fine tailings and
positioned to
receive mature fine tailings of a desired density, such that a top end of the
hollow
conduit is open above a free water surface of the pond, and such that the
mature fine
tailings of the desired density fill the hollow conduit to a hydrostatically
equilibrating level
for balancing hydrostatic pressures inside the hollow conduit with hydrostatic
pressures
outside the hollow conduit; and
means for removing the mature fine tailings from within the hollow conduit;
wherein the hollow conduit has a width or a diameter selected to allow an
inflow of the mature fine tailings of the desired density into the hollow
conduit to sustain
a selected mature fine tailings removal capacity.
11. The system as claimed in claim 10 wherein the means for removing
the mature fine tailings is a pump.

- 12 -
12. The system as claimed in claim 10 wherein the means for removing
the mature fine tailings is a siphon.
13. The system as claimed in claim 10 wherein the means for removing
the mature fine tailings is selected from a group consisting of an auger, a
clam shell and
a shovel.
14. The system as claimed in claim 10 further comprising at least one
deflector element surrounding an outside surface of the hollow conduit.
15. The system as claimed in claim 10 wherein the hollow conduit is
cylindrical hollow conduit.
16. The system as claimed in claim 15, wherein the diameter of the
hollow conduit is constant.
17. The system as claimed in claim 10 wherein the hollow conduit
further comprises a wall extending between the top end and the bottom and
having an
adjustable section that is adjustable to change the location of the bottom end
in the
pond.
18. The system as claimed in claim 10 further comprising a buoyancy
element connected to the hollow conduit.
19. The system as claimed in claim 10 further comprising at least one
support element extending from the hollow conduit to a bottom of the pond.
20. A system for removing mature fine tailings of a desired density from
a tailings pond, comprising:
(a) a hollow conduit having a wall defining an open bottom end
for
immersion in the pond and an open top end for locating above a free water
surface of
the pond, and wherein the hollow conduit has a width or a diameter selected
such that
when the hollow conduit is positioned in the pond such that a bottom end of
the conduit
is open to the mature fine tailings and positioned to receive mature fine
tailings of a

- 13 -
desired density, the mature fine tailings of the desired density fill the
hollow conduit to a
hydrostatically equilibrating level for balancing hydrostatic pressures inside
the hollow
conduit with hydrostatic pressures outside the hollow conduit, and such that
during the
mature fine tailings removal process the mature fine tailings of the desired
density are
allowed to inflow into the hollow conduit to sustain a selected removal
capacity;
(b) means for adjusting the conduit wall height to change the distance
between the bottom end and the top end
(c) means for removing the mature fine tailings from within the hollow
conduit, selected from a group consisting of a pump, a siphon, an auger, a
clam shell
and a shovel; and
(d) means for supporting the hollow conduit, selected from a group
consisting of at least one of a buoyancy element connected to the hollow
conduit and at
least one support element extending from the hollow conduit and for contacting
a
bottom of the pond.


A single figure which represents the drawing illustrating the invention.

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Admin Status

Title Date
(22) Filed 2013-04-02
Examination Requested 2013-10-16
(41) Open to Public Inspection 2014-02-11
(45) Issued 2016-02-16

Maintenance Fee

Description Date Amount
Last Payment 2018-01-09 $100.00
Next Payment if small entity fee 2019-04-02 $100.00
Next Payment if standard fee 2019-04-02 $200.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Filing $200.00 2013-04-02
Request for Examination $400.00 2013-10-16
Registration of Documents $100.00 2014-08-20
Maintenance Fee - Application - New Act 2 2015-04-02 $50.00 2015-03-18
Final $150.00 2015-12-04
Maintenance Fee - Patent - New Act 3 2016-04-04 $50.00 2016-03-07
Maintenance Fee - Patent - New Act 4 2017-04-03 $50.00 2017-01-10
Maintenance Fee - Patent - New Act 5 2018-04-03 $100.00 2018-01-09

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Abstract 2013-04-02 1 21
Description 2013-04-02 6 222
Claims 2013-04-02 2 66
Drawings 2013-04-02 6 109
Representative Drawing 2013-10-28 1 5
Cover Page 2014-02-17 2 43
Description 2015-03-03 9 309
Claims 2015-03-03 4 123
Description 2015-05-28 9 309
Claims 2015-05-28 4 123
Description 2015-10-08 9 305
Claims 2015-10-08 4 131
Cover Page 2016-01-27 1 37
Correspondence 2014-11-05 2 59
Correspondence 2013-04-23 1 18
Prosecution-Amendment 2013-10-16 2 60
Prosecution-Amendment 2013-10-16 1 41
Prosecution-Amendment 2013-10-23 1 22
Correspondence 2014-09-17 5 186
Correspondence 2014-09-25 1 24
Prosecution-Amendment 2013-11-21 1 20
Correspondence 2013-12-12 2 69
Correspondence 2013-12-17 1 18
Correspondence 2014-11-18 1 24
Correspondence 2014-11-18 1 27
Prosecution-Amendment 2014-12-04 5 288
Prosecution-Amendment 2015-07-15 4 279
Correspondence 2014-08-28 1 30
Prosecution-Amendment 2014-10-28 1 4
Correspondence 2015-02-23 2 75
Correspondence 2015-03-13 1 24
Correspondence 2015-03-13 1 31
Prosecution-Amendment 2015-03-03 20 795
Correspondence 2015-03-03 2 65
Prosecution-Amendment 2015-05-04 3 214
Prosecution-Amendment 2015-05-28 9 303
Prosecution-Amendment 2015-06-17 230 16,023
Prosecution-Amendment 2015-06-25 1 25
Prosecution-Amendment 2015-06-25 1 19
Prosecution-Amendment 2015-10-08 18 667
Correspondence 2015-12-04 2 49
Correspondence 2015-12-23 1 23
Correspondence 2016-01-11 1 23