Mining systems and methods

Patent metadata

Field	Value
Publication number	US-9234980-B2
Application number	US-201113990946-A
Country	US
Kind code	B2
Filing date	Dec 2, 2011
Priority date	Dec 2, 2010
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

The present invention provides systems and methods capable of improving the efficiency and effectiveness of leaching operations. In one embodiment, the present invention may utilize a coiled tubing directional drilling system capable of treating interior portions of the heap/formation. In one embodiment, the present invention may utilize a system and method capable of capturing real time temperature and resistivity data pertaining to pregnant solution characteristics in the heap/formation. In one embodiment, the present invention may utilize one or more wire line deployed X-Ray Fluorescence (XRF) spectrometers capable of quantitatively measuring concentrations of desired metals in the heap/formation during leaching operations. In one embodiment, the present invention utilizes multiple passes of elemental capture spectroscopy logs acquired at regular time intervals to monitor metal concentrations during leaching operations. In one embodiment, the present invention provides one or more subsurface barriers capable of optimizing leaching operations.

First claim

What is claimed is:

1. A method of monitoring the progress of leaching operations comprising the steps of: drilling a monitoring well into a heap;
placing one or more sensors inside the monitoring well, the sensors capable of collecting temperature or resistivity data concerning said heap; and
analyzing said temperature or resistivity data in order to ascertain the location or characteristics of a pregnant solution within said heap.

2. The method of claim 1 , wherein the sensors further comprise distributed temperature system (DTS) fiber optic sensors.

3. The method of claim 1 , wherein the sensors further comprises electrodes attached to the monitoring well.

4. The method of claim 1 , the method further comprising:
generating a three dimensional temperature profile of the heap.

5. The method of claim 1 , wherein a coil tubing arrangement is utilized to drill the monitoring well.

6. The method of claim 1 , wherein the characteristics comprise a concentration of a metal in the pregnant solution.

7. The method of claim 6 , where the sensors further comprise X-ray fluorescence spectrometers capable of measuring the concentration of the metal.

8. The method of claim 1 , wherein the method further comprises:
utilizing elemental capture spectroscopy to measure and monitor a dry weight of one or more metals in the pregnant solution.

9. The method of claim 8 , wherein the method further comprises utilizing multiple passes of elemental capture spectroscopy logs to monitor a concentration of a metal in the pregnant solution.

10. The method of claim 1 , wherein the method further comprises utilizing one or more active and/or passive injection control devices to homogenize a flow of lixiviants.

11. The method of claim 1 , wherein the method further comprises utilizing one or more active and/or passive injection control devices to homogenize a flow of chemicals.

12. The method of claim 1 , wherein the method comprises analyzing the resistivity data to determine a location of the pregnant solution within the heap.

13. The method of claim 12 , wherein the resistivity data is expressed as a function of at least one of porosity, moisture content or conductivity of the pregnant solution.

14. The method of claim 1 , wherein the monitoring well further comprises at least one fiberglass casing.

Assignees

• Mathieu Gilles
• Lang Kent
• Wraight Peter
• Banas Roland
• Grau James A
• Clayton Edward
• Schlumberger Technology Corp

Inventors

• Mathieu Gilles
• Lang Kent
• Wraight Peter
• Banas Roland
• Grau James A
• Clayton Edward

Classifications

• E21B43/28 Primary

  Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent (E21B43/241 takes precedence) · CPC title

• E21B47/09

  Locating or determining the position of objects in boreholes or wells {, e.g. the position of an extending arm}; Identifying the free or blocked portions of pipes · CPC title

• G01V8/10 Primary

  Detecting, e.g. by using light barriers (by reflection from the object G01S17/00) · CPC title

• Y02P10/20

  Recycling · CPC title

• E21B47/00

  Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B21/08) · CPC title