Floating wicks for slurry consolidation

Patent metadata

Field	Value
Publication number	US-9598299-B2
Application number	US-201213720958-A
Country	US
Kind code	B2
Filing date	Dec 19, 2012
Priority date	Sep 11, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

Systems and methods for remediating an initially liquid-like slurry pond include distributing one or more floating wicks into the slurry pond, wherein the slurry pond includes a slurry with a supernatant level above the slurry. A method also includes placing a load on the slurry, wherein the load causes an effective stress on the slurry and aids in dewatering the slurry.

First claim

What is claimed is:

1. A method for remediating a slurry pond, comprising:
distributing one or more wicks into the slurry pond wherein the one or more wicks buoyantly float in a slurry at least partially below a level of a supernatant; and
using a mechanism to control a flotation of the one or more wicks so that one end of the one or more wicks floats near an interface between a layer of the slurry and the level of supernatant, wherein the mechanism comprises a diaphragm, weights, weighted buoys, floats, or a selection of a density of the material of the one or more wicks, or any combinations thereof; and
wherein one end of the one or more wicks floats slightly above an interface between the layer of the slurry and the level of supernatant.

2. The method of claim 1 , wherein the slurry has an initial shear strength of less than 200 Pa.

3. The method of claim 1 , further comprising placing a load on the slurry.

4. The method of claim 3 , wherein the load is placed on the slurry after one or more wicks are distributed into the slurry pond.

5. The method of claim 4 , wherein placing the load on the slurry comprises distributing sand on top of the slurry.

6. The method of claim 3 , further comprising placing a geofabric on the slurry wherein the geofabric is positioned above the one or more wicks and below the load.

7. The method of claim 6 , wherein the one or more wicks are attached to the geofabric.

8. The method of claim 6 , wherein the load is placed on the geofabric and causes the geofabric to sink below a level of a supernatant but to remain above a layer of the slurry.

9. The method of claim 8 , wherein placing the load on the geofabric comprises placing sand, treated tailings, mature fine tailings, treated mature fine tailings, coke, or composite tailings, or any combinations thereof, on the geofabric.

10. The method of claim 1 , wherein at least a portion of the one or more wicks sinks within the slurry to a depth of at least one meter.

11. The method of claim 1 , wherein distributing the one or more wicks into the slurry pond comprises using a floating or flying vessel to distribute the one or more wicks.

12. The method of claim 1 , wherein the mechanism comprises an adjustable buoyancy device that can allow the flotation of the one or more wicks to be adjusted.

13. The method of claim 1 , wherein the one or more wicks comprise a plurality of wicks that are connected together.

14. The method of claim 1 , wherein the one or more wicks are sealed at one or both ends.

15. The method of claim 14 , wherein the exterior of the one or more wicks comprises a semi-permeable material and a liquid may only enter into the one or more wicks through the semi-permeable material.

Assignees

• Rennard David C
• Palmer Thomas R
• Clingman Scott R
• Kaminsky Robert D
• Exxonmobil Upstream Res Co

Inventors

• Rennard David C
• Palmer Thomas R
• Clingman Scott R
• Kaminsky Robert D

Classifications

• E21C41/31

  for oil-bearing deposits · CPC title

• C02F2103/10

  from quarries or from mining activities · CPC title

• C02F11/121 Primary

  by mechanical de-watering · CPC title

• C02F11/16

  using drying or composting beds · CPC title

• C10G1/04

  by extraction · CPC title