WO2003015025A2 - Apparatus, method and system for single well solution-mining - Google Patents
Apparatus, method and system for single well solution-mining Download PDFInfo
- Publication number
- WO2003015025A2 WO2003015025A2 PCT/US2002/025380 US0225380W WO03015025A2 WO 2003015025 A2 WO2003015025 A2 WO 2003015025A2 US 0225380 W US0225380 W US 0225380W WO 03015025 A2 WO03015025 A2 WO 03015025A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- subterranean
- mixture
- fluid
- well
- elbow
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
Definitions
- This invention relates to solution-mining of subterranean materials.
- the following discusses the disclosed solution-mining invention as applied to trona, but it is understood that this solution-mining invention applies to all subterranean materials.
- the subterranean material trona also known as natural soda ash, is a crystalline form of sodium carbonate and sodium bicarbonate, known as sodium sesquicarbonate, having the formula Na CO 3 - NaHCO 3 - 2H 2 O.
- deposits of natural trona are rare, but the world's largest known deposit is located in the Green River Basin of southeastern Wyoming. Smaller deposits of trona are found near Memphis, Egypt and the Lower Nile Valley, widely throughout the soda lakes of Africa, Armenia, and Iran, and in the alkali deserts of Mongolia and Mongolia. From natural trona, the primary end product is soda ash. In fact, Wyoming produces 90% of the processed soda ash in the United States and 30% of the world's supply.
- Other end-products from trona include sodium bicarbonate, caustic soda, sodium sulfite, sodium cyanide and sodium phosphate. Improved and cheaper processes for mining trona from natural deposits are desired.
- Mining is an age-old approach for removing subterranean materials, e.g., trona, nahcolite, dawsonite, wegscheiderite, thermonatrite, pirssonite, natron, gaylussite, shortite, halite, and other salts, minerals, and so forth.
- Many deposits of subterranean materials do not permit commercially viable extraction, whether through underground mechanical mining or solution-mining. For example, not even 10% of known trona deposits permit commercially viable underground mechanical mining, and trona solution-mining has not been economical.
- Underground mechanical mining requires deep shafts to remove the subterranean material, and ever-deeper shafts are used as more material is extracted, hi addition, mechanical mining is people-intensive. This creates a dangerous operating environment.
- the material After lifting the material to the surface, the material is calcined to expel volatile components, such as carbon dioxide. Calcination is an energy-intensive processing step that affects the economics of mechanical mining. After calcination, the calcined material is recrystallized in aqueous solution, collected, dried and ready for further processing or shipping.
- Solution-mining is a advocated alternative to mechanical mining, but solution- mining has not proven as economical as desired.
- Solution-mining of subterranean materials, in particular, trona is possible using hot water or alkaline solutions.
- U.S. Pat. No. 2,388,009 discloses the use of a hot water or hot carbonate solution as the mining fluid. See also U.S. Pat. Nos 2,625,384 (Pike et al.); 2,847,202 (Pullen); 2,979,315 (Bays); 3,018,095 (Redlinger); 3,050,290 (Caldwell et al.); 3,086,760 (Bays); U.S. Pat. No.
- the claimed invention is a method, system, and apparatus for solution-mining of subterranean materials.
- a method for solution-mining of a subterranean material, the method comprising injecting a fluid into an elbow well, the fluid forming a subterranean mixture with the subterranean material, and collecting the subterranean mixture from the elbow well.
- a system is provided for solution-mining of a subterranean material, the system comprising a means for injecting a fluid into an elbow well, the fluid forming a subterranean mixture with the subterranean material, and a means for collecting the subterranean mixture from the elbow well.
- an apparatus for solution-mining of a subterranean material, the apparatus comprising an injection tube, wherein the injection tube has an injection tube inner diameter of sufficient size to allow for injection of a fluid for mining of a subterranean material.
- the apparatus further comprises a production casing, wherein the production casing has a production casing inner diameter of sufficient size to allow for production of a subterranean mixture of the fluid and the subterranean material between an outer surface of the injection tube and an inner surface of the production casing.
- Figure 1 is a schematic of the cased elbow well drilled into a bed of a subterranean material, wherein the elbow well comprises an injection tube, a production casing, and a production tube that is connected to a pump to help lift the subterranean mixture in the cavity to a collection location, here, the earth's surface.
- Figure 2 is a cross-sectional view of the initial cavity in the elbow well.
- Figure 3 is a cross-sectional view of the cavity in the elbow well, wherein the cavity is larger than in Figure 2.
- Figure 4 is a cross-sectional view of the cavity in the elbow well, wherein the cavity is larger than in Figure 3.
- the disclosed solution-mining invention is a device, method, and system for solution-mining of subterranean materials, such as trona, nahcolite, dawsonite, wegscheiderite, theimonatrite, pirssonite, natron, gaylussite, shortite, halite, and other salts, minerals, and so forth.
- subterranean materials such as trona, nahcolite, dawsonite, wegscheiderite, theimonatrite, pirssonite, natron, gaylussite, shortite, halite, and other salts, minerals, and so forth.
- An elbow well 15 is a well that begins at the earth's surface 70, and first penetrates vertically before penetrating horizontally. Although the elbow well 15 does not necessarily resemble the shape of a human elbow, there is a vertical portion that eventually turns to a horizontal portion. For trona, the estimated depth 160 for mining is 2000 feet below the earth's surface 70. Both an injection tube 45 and a production tube 60a are located in the elbow well 15, wherein 3-V" J55 tubing is used in one example for the injection tube 45, but other sizes and types of tubing will occur to those of skill in the art without departing from the scope of the present invention.
- a fluid 10 is injected into the injection tube 45, wherein the fluid 10 reacts with the subterranean material 25 to create a mixture 55 (e.g., a solution) and a cavity 50.
- the mixture 55 flows between the injection tube 45 and the production casing 60b.
- a pump 140 is attached to the production tube 60a to help lift the mixture 55 to the collection point 65 (here, the earth's surface 70).
- the elbow well 15 in some embodiments, is over 3000 linear feet in length 155 within the bed 30 of the subterranean material 25.
- the cavity 50 expands as more fluid 10 is injected into the well 15 dissolving more subterranean material 25.
- the cavity 50 expands outward from the end of the elbow well 15, and therefore the cavity 50 propagates back to the well 15.
- the injection tube 45 is perforated in some embodiments to permit further amounts of the mixture 55 to be collected.
- the injection tube 45 is withdrawn, partially, until debris from the collapse is clear and flow of the mixture 55 is raised to an acceptable level. High pressures of operation may cause the material 25 in the mixture 55 to escape before collection of the subterranean material mixture 55.
- the subterranean material 25 is selected from a group consisting essentially of trona, dawsonite, wegscheiderite, nahcolite, thermonatrite, pirssonite, natron, gaylussite, shortite, halite, and other salts, minerals, and so forth.
- the fluid 10 is selected from a group consisting essentially of water, a caustic mixture, a sodium carbonate solution, or any other fluid 10 capable of mechanically and/or chemically reacting with the subterranean material 25 to be mined so as to produce a mixture 55 capable of being removed from the production casing 60b through a production tube 60a.
- the fluid 10 is heated.
- an acceptable pump 140 comprises an electric submersible centrifugal pump, 140 such as those manufactured by Baker Hughes Centrilift.
- placement of the pump 140 is above the bed 30 of subterranean mineral 25, that is, above the mining areas.
- the pump 140 is placed in some embodiments about 1100 feet below the earth's surface 70 in the elbow well 15.
- Other pumps 140 acceptable for use with the claimed invention include piston/cylinder pumps, driven by sucks rods from the surface 70. Still other pumps 140 acceptable for use with the claimed invention will occur to those of skill in the art.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002332500A AU2002332500A1 (en) | 2001-08-09 | 2002-08-09 | Apparatus, method and system for single well solution-mining |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/925,788 | 2001-08-09 | ||
US09/925,788 US20030029617A1 (en) | 2001-08-09 | 2001-08-09 | Apparatus, method and system for single well solution-mining |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003015025A2 true WO2003015025A2 (en) | 2003-02-20 |
WO2003015025A3 WO2003015025A3 (en) | 2003-12-24 |
Family
ID=25452248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/025380 WO2003015025A2 (en) | 2001-08-09 | 2002-08-09 | Apparatus, method and system for single well solution-mining |
Country Status (5)
Country | Link |
---|---|
US (3) | US20030029617A1 (en) |
CN (1) | CN1564904A (en) |
AU (1) | AU2002332500A1 (en) |
TR (1) | TR200400211T1 (en) |
WO (1) | WO2003015025A2 (en) |
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-
2002
- 2002-08-09 AU AU2002332500A patent/AU2002332500A1/en not_active Abandoned
- 2002-08-09 WO PCT/US2002/025380 patent/WO2003015025A2/en not_active Application Discontinuation
- 2002-08-09 CN CNA028197968A patent/CN1564904A/en active Pending
- 2002-08-09 TR TR2004/00211T patent/TR200400211T1/en unknown
-
2005
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003035801A2 (en) * | 2001-10-24 | 2003-05-01 | Shell Oil Company | Producing hydrocarbons and non-hydrocarbon containing materials from a hydrocarbon containing formation |
WO2003035801A3 (en) * | 2001-10-24 | 2005-02-17 | Shell Oil Co | Producing hydrocarbons and non-hydrocarbon containing materials from a hydrocarbon containing formation |
US8361329B2 (en) | 2009-02-05 | 2013-01-29 | Oci Wyoming L.P. | Ozone treatment of alkali metal compound solutions |
US8490702B2 (en) | 2010-02-18 | 2013-07-23 | Ncs Oilfield Services Canada Inc. | Downhole tool assembly with debris relief, and method for using same |
US8931559B2 (en) | 2012-03-23 | 2015-01-13 | Ncs Oilfield Services Canada, Inc. | Downhole isolation and depressurization tool |
US9140098B2 (en) | 2012-03-23 | 2015-09-22 | NCS Multistage, LLC | Downhole isolation and depressurization tool |
Also Published As
Publication number | Publication date |
---|---|
AU2002332500A1 (en) | 2003-02-24 |
CN1564904A (en) | 2005-01-12 |
TR200400211T1 (en) | 2004-11-22 |
US20030029617A1 (en) | 2003-02-13 |
US20060138853A1 (en) | 2006-06-29 |
WO2003015025A3 (en) | 2003-12-24 |
US20050231022A1 (en) | 2005-10-20 |
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