EP1327053B1 - Method and pumping out means for improving the supply of water to a source or a water procurement well - Google Patents

Method and pumping out means for improving the supply of water to a source or a water procurement well Download PDF

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Publication number
EP1327053B1
EP1327053B1 EP01988816A EP01988816A EP1327053B1 EP 1327053 B1 EP1327053 B1 EP 1327053B1 EP 01988816 A EP01988816 A EP 01988816A EP 01988816 A EP01988816 A EP 01988816A EP 1327053 B1 EP1327053 B1 EP 1327053B1
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Prior art keywords
well
water
carbon dioxide
pipe
shut
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EP01988816A
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German (de)
French (fr)
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EP1327053A2 (en
Inventor
Godefridus Marinus Van Manen
Jaap Kuijpers Wentink
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Linde GmbH
Hoek Loos BV
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Linde GmbH
Hoek Loos BV
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/001—Cooling arrangements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B43/25—Methods for stimulating production
    • E21B43/255—Methods for stimulating production including the injection of a gaseous medium as treatment fluid into the formation

Definitions

  • the invention relates to a method for improvement the water supply from a water-containing earth layer too a source or well placed in the ground, in particular water extraction well, which source or well from a borehole, which extends into the previously mentioned layer of earth or groundwater ranges, whereby first the well or a part of the Well closed by shut-off, so that the lower part of the well is airtight at the top is closed and can be pressurized, which shut-off means contain a shut-off device, on or in the fairing pipe or riser of the Well and this is airtight closes which shut-off device an inflow pipe contains a substance (such as a gas, a liquid or a solid) under a desired pressure, in the upper part of the closed upper part of the To be able to supply wells.
  • a substance such as a gas, a liquid or a solid
  • the pumping out of water from hydrous Earth layers occur through wells or springs. With In time, the water yield of water wells always decreases because the supply to the well is gradually getting silted up.
  • the cause of the silting of a well or a source can be mechanical, biological or chemical type or a combination of these.
  • the silting can be done by using the Water entrained particles, by the increase of Bacteria or by deposition of, for example, lime, Iron or other chemical substances or compounds or a combination of these factors have been.
  • Another method to improve the water flow to well is that near the Bottom of the well pipe forced new openings by, hoping that the performance of the Well increases, with dynamite new cracks in the Earth layer be brought.
  • This method is included dried out wells that are in a rocky Soil and dried out, applied. Often the Use of dynamite results in the well being damaged in such a way that this is no longer good usable. In any case, such is one Method for a large number of wells such as water wells not applicable.
  • This device forms the preamble of claim 1.
  • liquid carbon dioxide is pressed into the borehole, until there is solid Carbon dioxide is created. This happens at a temperature of minus 78 ° C. Around To cool the well so deep, considerable amounts of energy are necessary.
  • Object of the present invention is to propose a method with which it is possible to determine the yield of an existing well, whose yield in Has decreased over time, e.g. was halved, to enlarge again.
  • a method for optimizing the flow of water from a hydrous soil layer to a well, or from groundwater to one Water extraction well, which has the quality of the pumped out Water after cleaning the well did not worsen. It should the method may be cheaper than known methods.
  • Nitrogen has that Advantage that carbon dioxide is readily soluble in water and thus formed Gas bubbles from carbon dioxide again be quickly absorbed by the water and so not as is the case with nitrogen, the pores with Gas bubbles clog, which gas bubbles at a pressure reduction of or cooling the water, which the gas contains (caisson disease), arise.
  • Such a method for improving the inflow from water from a hydrous soil layer to a Well is from US Patent US 5,394,942 Known which method to the aforementioned American Patent 4,534,413 is founded and also first the well is closed, after which then liquid carbon dioxide in the sealed Well is introduced under such pressure, that under the near the bottom of the well prevailing pressure the liquid carbon dioxide into solid Carbon dioxide passes over with the intention of making the well far To cool down below freezing. After the Fountain up to a desired height with firm Carbon dioxide is filled, the well becomes some time left alone until the solid carbon dioxide sublimates is, so that by the low temperature of the solid Carbon dioxide the water, which in the well and in the adjacent part of the fountain surrounding Earth layer is located over as large a distance as possible frozen from the well in the soil layer.
  • Both methods intend the water, which is in the well pipe and in the surrounding the well pipe Floor is located over as large a distance from To freeze wells in the hydrous soil layer, with it new openings and cracks in the earth layer arise, which then causes the water from the earth's layer can flow back to the well. Water, which freezes, expands. So, after the water in Well is frozen by further cooling the fountain Environment deeper and deeper in the surrounding earth layer that freeze existing water there. Once then a lot Water is trapped and then freezes, Freezing this amount of water will make you huge Forces exerted on the surrounding earth layer, thereby existing openings are enlarged, as well as surrounding Parts of the earth layer are offset.
  • the temperature which can be maintained in the well during a certain time during the sublimation of the carbon dioxide in the well is at least below the triple point of carbon dioxide, namely -60 ° Celsius.
  • the temperature which can be achieved by the sudden reduction of the pressure in the well when using nitrogen is even lower.
  • this method is particularly suitable for a Application in wells and water wells, whose Water yield has decreased, for example, halved and groundwater over several dozens Meter depth difference from a hydrous Soil layer is sucked.
  • the invention further relates to evacuation means for removal from a well of e.g. in the water Suspension gone loose particles or from in the water dissolved products, both from around the water well existing hydrous soil layer as well near the hydrous soil layer in the well existing filter means which Abpumpsch from a suction tube, at the near the lower end two parallel to each other and on one another Distance to each other perpendicular to the suction tube fastened, flat plate-shaped devices whose Outer diameter about the inner diameter of the Riser corresponds, so that a closed space is formed, the side of the wall of the riser and both at the top and at the bottom bounded by the two plate-shaped devices is, which suction pipe one or more inflow openings has, which is in that part of the suction tube located in a closed space between located the two plate-shaped devices and which device contains pumping means containing the water can be discharged from the well via the suction tube.
  • Figure 1 shows a cross section of a source or a Water extraction well 1.
  • This well 1 consists from a borehole 2 with a diameter of 600 mm up to a depth of 80 meters below the earth's surface 3 enough.
  • On the bottom 4 of the borehole 2 is a 4 Meter thick layer 5 loam attached and on it Riser 6 made of PVC with a diameter of 250 mm.
  • the foot of the riser consists of a sand trap 7, which is closed at the bottom and whose standing wall 8 is about 1 meter.
  • the part 9 of the wall 8 of the riser provided with filter slots or perforations 10 with a diameter of 0.75 mm as a filter or Sieve, through which the water flow into the riser 6 can while the remaining upper part 11 of the riser 6 from a water-impermeable wall 12 consists.
  • the borehole with special filter gravel with Filter quality filled the diameter between 1.0 mm and 1.6 mm, which together with the Filter part 9 of the riser 6, the filter 14 for the inflowing water forms.
  • Figures 2 to 6 show a number of phases of the process for improving the inflow of water to the well.
  • Figure 2 shows schematically the same water extraction well of Figure 1, wherein the riser is closed by a shut-off device 21, also known under the name "Packer" through which the supply pipe 22, while both above and below the shut-off water in the riser 6.
  • the supply pipe 22 for the carbon dioxide is so deep in the water production well or well 1 that the discharge port 23 of the supply pipe 22 is located at the desired depth in the water production well 1.
  • Figure 3 shows schematically the same water well 1 during the feeding of carbon dioxide into the well, the temperature of the carbon dioxide gas is not so important because the water in the well has a high thermal output and will freeze only after the water in the well has been replaced by gaseous carbon dioxide
  • Figure 4 shows schematically the same water extraction well, after the water has been pushed below the outflow opening 23 and before the well is frozen.
  • a solid line 24 approximately indicates which part of the well and the surrounding filter 14 has filled up with the gas.
  • FIG. 5 shows the same water extraction well after carbon dioxide has been introduced for a long time in the lower closed part of the water production well, the temperature of which is below the freezing point of water and before the well is thawed, schematically with a dashed line 25 the part of the well, the surrounding filter 14 and the surrounding hydrous soil layer 17 is shown, which is below the freezing point of the water before the well is thawed.
  • FIG. 6 schematically shows the same water extraction well, the process being applied at a different depth in the well and showing the same state as in FIG. 5.
  • FIG 7 shows the same well as shown in Figure 1, wherein in the well 1 Abpumpsch 26 are introduced for gradual, gradual pumping out of the water with the substances dissolved therein and the particles in suspension from the surrounding the fountain filter 14 and the hydrous soil layer 17.
  • the Abpumpstoff consist of a suction tube 27, at the near the lower end of two parallel to each other and at a mutual distance to each other vertically mounted on the exhaust pipe, flat plate-shaped devices 28 and 29 whose outer diameter corresponds approximately to the inner diameter of the riser 6, thus forming a closed space bounded laterally by the wall of the riser 6 and at the top by the one plate-shaped device and at the bottom by the other plate-shaped device.
  • the suction pipe 27 has a series of inflow openings 30.
  • a supply 31 for gas is attached, whereby it is possible to remove very gradually water with suspended particles.
  • the part of the well 1 above the plate-shaped device 28 and the part of the well 1 below the plate-shaped device 29 are connected to each other by a tube 32 so that the pumping 26 can be easily offset in the well of the well.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Earth Drilling (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

The invention relates to a method for improving the supply of water from a layer in the earth to a source which is located in the ground or a well, especially a water procurement well, said source or well consisting of a drill hole extending as far as the above-mentioned earth layer or groundwater. The well or part of the well is initially sealed by cutting off means which include an inflow pipe, whereby the lower part of the well is sealed in an airtight manner in an upward direction and can be pressurized by supplying a gas, liquid or a solid. According to the invention, the well is initially filled with gaseous carbon dioxide below the outflow opening of the inflow pipe. The carbon dioxide is subsequently guided through the inflow pipe, whereby the water located close to the end of the pipe and the earth layer is frozen at a specific distance from the outflow opening of the pipe. After a specific time period during which the well re-thaws, the fine particles of the deposits which are dissolved as a result of the inventive method are removed from the well, along with the pump water, with the aid of the pumping out means.

Description

Die Erfindung betrifft ein Verfahren zur Verbesserung der Wasserzufuhr aus einer wasserhaltigen Erdschicht zu einer im Boden angebrachten Quelle oder einem Brunnen, insbesondere Wassergewinnungsbrunnen, welche Quelle oder Brunnen aus einem Bohrloch besteht, welches bis in die vorher genannte Erdschicht oder in das Grundwasser reicht, wobei zuerst der Brunnen oder ein Teil des Brunnens durch Absperrmittel verschlossen wird, so daß der untere Teil des Brunnens nach oben hin luftdicht verschlossen ist und unter Druck gesetzt werden kann, welche Absperrmittel eine Absperrvorrichtung enthalten, die auf oder im Verkleidungsrohr oder Steigrohr des Brunnens befestigt wird und dieses luftdicht verschließt, welche Absperrvorrichtung ein Zuflußrohr enthält, um einen Stoff (wie ein Gas, eine Flüssigkeit oder einen festen Stoff) unter einem gewünschten Druck, in den nach oben hin verschlossenen unteren Teil des Brunnens zuführen zu können.The invention relates to a method for improvement the water supply from a water-containing earth layer too a source or well placed in the ground, in particular water extraction well, which source or well from a borehole, which extends into the previously mentioned layer of earth or groundwater ranges, whereby first the well or a part of the Well closed by shut-off, so that the lower part of the well is airtight at the top is closed and can be pressurized, which shut-off means contain a shut-off device, on or in the fairing pipe or riser of the Well and this is airtight closes which shut-off device an inflow pipe contains a substance (such as a gas, a liquid or a solid) under a desired pressure, in the upper part of the closed upper part of the To be able to supply wells.

Das Herauspumpen von Wasser aus wasserhaltigen Erdschichten erfolgt durch Brunnen oder Quellen. Mit der Zeit nimmt der Wasserertrag von Wasserbrunnen immer ab, weil die Zufuhr zum Brunnen allmählich verschlammt. Die Ursache für die Verschlammung eines Brunnens oder einer Quelle kann mechanischer, biologischer oder chemischer Art oder eine Kombination von diesen sein. So kann die Verschlammung zum Beispiel durch mit dem Wasser mitgeführten Teilchen, durch den Zuwachs von Bakterien oder durch Absetzung von zum Beispiel Kalk, Eisen oder anderen chemischen Stoffen oder Verbindungen oder eine Kombination von diesen Faktoren verursacht worden sein. The pumping out of water from hydrous Earth layers occur through wells or springs. With In time, the water yield of water wells always decreases because the supply to the well is gradually getting silted up. The cause of the silting of a well or a source can be mechanical, biological or chemical type or a combination of these. For example, the silting can be done by using the Water entrained particles, by the increase of Bacteria or by deposition of, for example, lime, Iron or other chemical substances or compounds or a combination of these factors have been.

Bis heute wird versucht, den Zufluß von Wasser zum Brunnen zu verbessern, indem der Schlamm in einer Quelle oder Wassergewinnungsbrunnen mit chemischen Mitteln entfernt wird; dazu werden zum Beispiel Salzsäure oder eine andere anorganische oder organische Säure, die ein in Wasser lösliches Salz bildet, in den Brunnen gepumpt. Auch werden oxydierende Stoffe wie Peroxyd, Sauerstoff oder organische Lösemittel wie Alkohol verwendet. Eine Schwierigkeit dabei ist, daß sich diese Stoffe im Wasser der wasserhaltigen Erdschicht verbreiten und das Grundwasser mit diesen Stoffen verschmutzt wird und daß dadurch, während längerer Zeit nachdem der Brunnen auf eine solche Art bearbeitet wurde, das heraufgepumpte Wasser mit dem im Brunnen verwendeten chemischen Mittel verschmutzt ist und dadurch keine Trinkwasserqualität hat. Dadurch können Brunnen, die Wasser mit einer Trinkwasserqualität liefern sollen, z.B. für die Bierindustrie, nach der Reinigung des Brunnens über längere Zeit nicht verwendet werden. Auch ist die Verwendung von solchen chemischen Stoffen eine schwere Belastung für die Umwelt, da das verschmutzte Wasser abgeführt und gereinigt werden muß und somit eine Verschwendung von Grundwasser und Energie auftritt. Die Alternative zur Reinigung des Wassergewinnungsbrunnens ist es, den Brunnen tiefer zu bohren oder einen neuen Brunnen oder Wassergewinnungsbrunnen anzubringen. Dies bringt jedoch hohe Kosten mit sich.To this day, attempts are being made to reduce the inflow of water To improve wells by putting the mud in one Source or water production well with chemical Funds is removed; These are, for example, hydrochloric acid or another inorganic or organic Acid, which forms a salt soluble in water, in the Well pumped. Also, oxidizing substances such as Peroxide, oxygen or organic solvents like Alcohol used. One difficulty is that these substances are in the water of the hydrous Earth layer spread and the groundwater with these Polluted substances and that thereby, during longer time after the well in such a way The pumped up water with the water in the Well used chemical agent is contaminated and thus has no drinking water quality. Thereby may well, the water with a drinking water quality to deliver, e.g. for the beer industry, after The cleaning of the well for a long time not be used. Also, the use of such chemical substances put a heavy burden on the Environment, since the polluted water is drained and cleaned must be and thus a waste of groundwater and energy occurs. The alternative to cleaning of the water extraction well it is, the well drill deeper or a new well or water extraction well to install. However, this brings high Costs with you.

Ein anderes Verfahren zur Verbesserung des Wasserzuflusses zu Brunnen besteht darin, daß in der Nähe der Unterseite des Brunnenrohrs neue Öffnungen forciert werden, indem, in der Hoffnung, daß die Leistung des Brunnens zunimmt, mit Dynamit neue Risse in die Erdschicht gebracht werden. Diese Methode wird bei ausgetrockneten Brunnen, die sich in einem felsigen Boden befinden und die ausgetrocknet sind, angewendet. Oft hat die Verwendung von Dynamit zur Folge, dass der Brunnen derart beschädigt wird, dass dieser nicht mehr gut verwendbar ist. Auf jeden Fall ist eine solche Methode bei einer großen Zahl von Brunnen wie Wassergewinnungsbrunnen nicht anwendbar.Another method to improve the water flow to well is that near the Bottom of the well pipe forced new openings by, hoping that the performance of the Well increases, with dynamite new cracks in the Earth layer be brought. This method is included dried out wells that are in a rocky Soil and dried out, applied. Often the Use of dynamite results in the well being damaged in such a way that this is no longer good usable. In any case, such is one Method for a large number of wells such as water wells not applicable.

Aus der WO 95/12740 ist ein Verfahren zur Verbesserung der Wasserzufuhr aus einer wasserhaltigen Erdschicht zu einer im Boden angebrachten Quelle oder einem Brunnen bekannt, wobei die Quelle oder der Brunnen aus einem Bohrloch bestehen, welches bis in die vorher genannte Erdschicht oder in das Grundwasser reicht, wobei

  • zuerst der Brunnen oder ein Teil des Brunnens durch Absperrmittel verschlossen wird, so dass der untere Teil des Brunnens nach oben hin luftdicht verschlossen ist und unter Druck gesetzt werden kann, welche Absperrmittel eine Absperrvorrichtung enthalten, die auf oder im Verkleidungsrohr oder Steigrohr des Brunnens befestigt wird und dieses luftdicht verschließt, welche Absperrvorrichtung ein Zuflussrohr enthält, um einen Stoff (wie ein Gas, eine Flüssigkeit oder einen festen Stoff) unter einem gewünschten Druck, in den nach oben hin verschlossenen unteren Teil des Brunnens zuführen zu können, wobei zuerst die Absperrmittel in den Brunnen angeordnet werden,
  • anschließend die Absperrvorrichtung luftdicht in oder auf dem Brunnen befestigt wird,
  • anschließend Kohlendioxid durch das Zuflussrohr unter einem bestimmten Druck, der über dem Druck des hydrostatischen Drucks, der an der Ausströmöffnung des Zuflussrohrs herrscht, liegt, eingebracht wird,
  • dieses Kohlendioxid flüssig eingebracht wird und im Brunnen in die feste Phase übergeht
  • und anschließend der Druck vom Brunnen genommen wird
From WO 95/12740 a method is known for improving the supply of water from a hydrous soil layer to an in-ground well or well, wherein the well or well consists of a well which extends into the aforementioned soil layer or groundwater ranges, where
  • First, the well or a part of the well is closed by shut-off means, so that the lower part of the well is hermetically sealed at the top and can be pressurized, which shut-off means include a shut-off device which is mounted on or in the casing pipe or riser of the well and this hermetically closes which shut-off device contains an inflow pipe to be able to supply a substance (such as a gas, a liquid or a solid) under a desired pressure in the upwardly closed lower part of the well, wherein first the shut-off means in the fountain can be arranged
  • then the shut-off device is airtight mounted in or on the well,
  • then carbon dioxide is introduced through the inlet pipe at a certain pressure higher than the pressure of the hydrostatic pressure prevailing at the outlet opening of the inlet pipe;
  • this carbon dioxide is introduced liquid and passes into the well in the solid phase
  • and then the pressure is taken from the well

Diese Vorrichtung bildet den Oberbegriff des Anspruchs 1. Bei diesem Verfahren wird flüssiges Kohlendioxid in das Bohrloch gepresst, bis dort festes Kohlendioxid entsteht. Dies passiert bei einer Temperatur von minus 78 °C. Um den Brunnen so tief abzukühlen, sind erhebliche Energiemengen notwendig.This device forms the preamble of claim 1. In this Procedure, liquid carbon dioxide is pressed into the borehole, until there is solid Carbon dioxide is created. This happens at a temperature of minus 78 ° C. Around To cool the well so deep, considerable amounts of energy are necessary.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren vorzuschlagen, mit dem es möglich ist, den Ertrag eines bestehenden Brunnens, dessen Ertrag im Laufe der Zeit abgenommen hat, z.B. halbiert wurde, wieder zu vergrößern. Insbesondere ein Verfahren zur Optimierung des Wasserzuflusses aus einer wasserhaltigen Erdschicht zu einem Brunnen, oder von Grundwasser zu einem Wassergewinnungsbrunnen, bei dem sich die Qualität des herausgepumpten Wassers nach der Reinigung des Brunnens nicht verschlechtert hat. Dabei soll das Verfahren preisgünstiger sein als bekannte Verfahren.Object of the present invention is to propose a method with which it is possible to determine the yield of an existing well, whose yield in Has decreased over time, e.g. was halved, to enlarge again. In particular, a method for optimizing the flow of water from a hydrous soil layer to a well, or from groundwater to one Water extraction well, which has the quality of the pumped out Water after cleaning the well did not worsen. It should the method may be cheaper than known methods.

Diese Aufgabe wird erfindungsgemäß gelöst von einem Verfahren mit den Schritten des Anspruchs 1. Ausgestaltungen der Erfindung sind Gegenstände von Unteransprüchen.This object is achieved by a method with the Steps of claim 1. Embodiments of the invention are articles of dependent claims.

Mit diesen Maßnahmen gemäß dem vorliegenden Verfahren wird erreicht, dass Stoffe, die sich auf und um den Brunnen herum, sowie auf den sich um den Brunnen befindlichen Gesteinen oder Filtermaterialien wie Filterkies niedergeschlagen und abgesetzt haben, losgefroren werden. Da das Wasser, welches den Brunnen umgibt, allmählich abkühlt, werden keine großen Kräfte auf den Brunnen und auf die den Brunnen umgebenden Teile ausgeübt, um so mehr, da das Wasser, welches sich um den Brunnen befindet, mit Kohlendioxyd gesättigt ist und bei Abkühlung teilweise aus dem Wasser entweicht, wodurch das Wasser in den Löchern und Öffnungen nahe dem Brunnen Wasser mit kleinen Gasbläschen aus Kohlendioxyd enthält. Ein zusätzlicher Vorteil der Anwendung von Kohlendioxyd vor z.B. Stickstoff ist, dass das gelöste Kohlendioxyd mit dem Wasser eine schwache Säure bildet, wodurch sich auch die chemischen Bedingungen ändern und z.B. Bakterien getötet werden. Da Kohlendioxyd und Stickstoff von Natur aus in der Luft vorkommen, werden diese Stoffe keine zusätzliche Belastung für die Umwelt bedeuten und die Verwendung von Kohlendioxyd vor der Anwendung von z.B. Stickstoff hat den Vorteil, dass Kohlendioxyd in Wasser gut lösbar ist und dadurch gebildete Gasblasen aus Kohlendioxyd wieder schnell vom Wasser aufgenommen werden und also nicht, wie es bei Stickstoff der Fall ist, die Poren mit Gasblasen verstopfen, welche Gasblasen bei einer Druckherabsetzung von oder Abkühlung des Wassers, welches das Gas enthält (Caissonkrankheit), entstehen.With these measures according to the present method is achieved that Substances that are on and around the well, as well as on the around the Well located rocks or filter materials such as filter gravel dejected and deposed, be frozen off. Because the water, which surrounds the fountain, gradually cools down, does not become great forces on the well and on the surrounding parts of the well, so to speak more, because the water, which is around the well, with carbon dioxide is saturated and partially escapes from the water on cooling, whereby the water in the holes and openings near the fountain water with contains small gas bubbles of carbon dioxide. An added benefit of Use of carbon dioxide before e.g. Nitrogen is that dissolved Carbon dioxide forms a weak acid with the water, which also causes change the chemical conditions and e.g. Bacteria are killed. There Carbon dioxide and nitrogen naturally occur in the air these substances do not represent an additional burden on the environment and the Use of carbon dioxide before the application of e.g. Nitrogen has that Advantage that carbon dioxide is readily soluble in water and thus formed Gas bubbles from carbon dioxide again be quickly absorbed by the water and so not as is the case with nitrogen, the pores with Gas bubbles clog, which gas bubbles at a pressure reduction of or cooling the water, which the gas contains (caisson disease), arise.

An sich ist aus dem amerikanischen Patent US 4.534.413 ein Verfahren zur Verbesserung des Zuflusses von Wasser aus einer wasserhaltigen Erdschicht zu einem Brunnen bekannt, welches Verfahren darin besteht, daß der Brunnen an der Oberseite mit einem Absperrmittel wie im amerikanischen Patent US 4.580.629 beschrieben, verschlossen wird, daß anschließend über dieses Absperrmittel ein Gas oder ein flüssiges Gas und vorzugsweise erst flüssiges Stickstoffgas und danach Kohlendioxyd unter einem bestimmten Druck, in den Brunnen eingebracht wird, um das Wasser im Brunnen und die den Brunnen umgebende Erdschicht einzufrieren, um anschließend das in den Brunnen eingebrachte Gas oder Flüssiggas während eines bestimmten Zeitraums unter einem gewünschten Druck zu halten und dann den Druck auf den Brunnen schnell herabzusetzen, wodurch das eingebrachte Gas adiabatisch stark abkühlt, das Wasser, welches sich im Brunnen und in der den Brunnen umgebenden Erdschicht befindet, weiter stark unter dem Gefrierpunkt abkühlt, so daß ein möglichst großer Teil des im Brunnen und um den Brunnen herum vorhandenen Wassers friert.In itself, the US patent US 4,534,413 a method for improving the inflow of water from a hydrous layer of earth to a well Known which method is that the Fountain at the top with a shut-off as in US Pat. No. 4,580,629, is closed, then on this Absperrmittel a gas or a liquid gas and preferably first liquid nitrogen gas and thereafter Carbon dioxide under a certain pressure, in the Fountain is brought to the water in the fountain and To freeze the layer of earth surrounding the well to then the gas introduced into the well or Liquefied gas during a certain period of time to maintain a desired pressure and then the pressure to quickly reduce to the well, causing the injected gas adiabatically strongly cools the water, which is located in the fountain and surrounding the fountain Earth layer is located, further strong under the Freezing point cools, so that the largest possible part of the fountain present in the fountain and around the fountain Water freezes.

Ein solches Verfahren zur Verbesserung des Zuflusses von Wasser aus einer wasserhaltigen Erdschicht zu einem Brunnen ist aus dem amerikanischen Patent US 5.394.942 bekannt, welches Verfahren auf das vorher genannte amerikanische Patent 4.534.413 gründet und wobei ebenfalls zuerst der Brunnen verschlossen wird, wonach anschließend flüssiges Kohlendioxyd in den verschlossenen Brunnen unter einem solchen Druck eingebracht wird, daß unter dem nahe der Unterseite des Brunnen herrschenden Druck das flüssige Kohlendioxyd in festes Kohlendioxyd übergeht mit der Absicht, den Brunnen weit unter dem Gefrierpunkt abkühlen zu können. Nachdem der Brunnen bis zu einer gewünschten Höhe mit festem Kohlendioxyd gefüllt ist, wird der Brunnen einige Zeit in Ruhe gelassen bis das feste Kohlendioxyd sublimiert ist, so daß durch die niedrige Temperatur des festen Kohlendioxyds das Wasser, welches sich im Brunnen und im angrenzenden Teil der den Brunnen umgebenden Erdschicht befindet über einen möglichst großen Abstand ab dem Brunnen in der Erdschicht gefroren ist.Such a method for improving the inflow from water from a hydrous soil layer to a Well is from US Patent US 5,394,942 Known which method to the aforementioned American Patent 4,534,413 is founded and also first the well is closed, after which then liquid carbon dioxide in the sealed Well is introduced under such pressure, that under the near the bottom of the well prevailing pressure the liquid carbon dioxide into solid Carbon dioxide passes over with the intention of making the well far To cool down below freezing. After the Fountain up to a desired height with firm Carbon dioxide is filled, the well becomes some time left alone until the solid carbon dioxide sublimates is, so that by the low temperature of the solid Carbon dioxide the water, which in the well and in the adjacent part of the fountain surrounding Earth layer is located over as large a distance as possible frozen from the well in the soil layer.

Beide Verfahren beabsichtigen das Wasser, welches sich im Brunnenrohr und in dem das Brunnenrohr umgebenden Boden befindet, über einen möglichst großen Abstand vom Brunnen in der wasserhaltigen Erdschicht einzufrieren, damit neue Öffnungen und Risse in der Erdschicht entstehen, wodurch dann das Wasser aus der Erdschicht wieder zum Brunnen strömen kann. Wasser, welches friert, dehnt sich aus. Also, nachdem das Wasser im Brunnen gefroren ist, wird durch weitere Abkühlung der Umgebung immer tiefer in der umgebenden Erdschicht das dort vorhandene Wasser frieren. Sobald dann eine Menge Wasser eingeschlossen wird und anschließend friert, werden durch Frieren dieser Menge von Wasser enorme Kräfte auf die umgebende Erdschicht ausgeübt, wodurch bestehende Öffnungen vergrößert werden, sowie umgebende Teile der Erdschicht versetzt werden. Dazu sollte das Wasser möglichst wenig Gas enthalten, damit die Gasblasen im Wasser die auftretenden Kräfte nicht verringern. Nachdem der Brunnen wieder aufgetaut ist, werden sich um den Brunnen herum bestimmte Risse vergrößert haben und eventuell neue Öffnungen entstanden sein, wodurch die Zufuhr des Wassers aus der wasserhaltigen Schicht zum Brunnen zugenommen haben wird. Both methods intend the water, which is in the well pipe and in the surrounding the well pipe Floor is located over as large a distance from To freeze wells in the hydrous soil layer, with it new openings and cracks in the earth layer arise, which then causes the water from the earth's layer can flow back to the well. Water, which freezes, expands. So, after the water in Well is frozen by further cooling the fountain Environment deeper and deeper in the surrounding earth layer that freeze existing water there. Once then a lot Water is trapped and then freezes, Freezing this amount of water will make you huge Forces exerted on the surrounding earth layer, thereby existing openings are enlarged, as well as surrounding Parts of the earth layer are offset. This should be the Water contains as little gas as possible, so that the gas bubbles Do not reduce the forces in the water. After the well has thawed again, it will become around the well certain cracks have increased and possibly new openings have been created, which the supply of water from the hydrous layer to the fountain will have increased.

Nach dem Verfahren des amerikanischen Patents US 5.394.942 liegt die Temperatur, die im Brunnen während einer bestimmten Zeit während des Sublimierens des Kohlendioxyds im Brunnen beibehalten werden kann mindestens unter dem Tripelpunkt von Kohlendioxyd, nämlich bei -60° Celsius.
Nach dem Verfahren des amerikanischen Patents US 4.534.413 liegt die Temperatur, die durch die plötzliche Herabsetzung des Drucks im Brunnen bei Verwendung von Stickstoff erreicht werden kann, noch tiefer.According to the method of US Pat. No. 5,394,942, the temperature which can be maintained in the well during a certain time during the sublimation of the carbon dioxide in the well is at least below the triple point of carbon dioxide, namely -60 ° Celsius.
According to the method of US Pat. No. 4,534,413, the temperature which can be achieved by the sudden reduction of the pressure in the well when using nitrogen is even lower.

Beide Verfahren beabsichtigen also, große Kräfte auf die Bodenformationen nahe der Unterseite des Brunnens auszuüben und entsprechen dem Verfahren, bei dem im Brunnen Dynamit verwendet wird. Dadurch sind diese bekannten Verfahren auch nur geeignet, um bei trockenen oder fast ausgetrockneten Brunnen in Felsformationen verwendet zu werden, wobei im Brunnen keine verletzbaren Teile vorhanden sind.Both methods therefore intend to use large forces the ground formations near the bottom of the fountain exercise and comply with the procedure whereby Well dynamite is used. As a result, these are known methods only suitable to dry or almost dried wells in rock formations to be used, wherein in the well no vulnerable Parts are present.

Da das erfindungsgemäße Verfahren in verschiedenen Tiefen in einem Brunnen durchgeführt werden kann und zwar stufenweise von der größten Tiefe nach oben hin, eignet sich dieses Verfahren daher besonders für eine Anwendung in Quellen und Wassergewinnungsbrunnen, deren Wasserertrag zurückgegangen ist, zum Beispiel halbiert wurde, und bei dem das Grundwasser über etliche Dutzende Meter Tiefenunterschied aus einer wasserhaltigen Erdschicht angesaugt wird.Since the inventive method in various Depths can be done in a fountain and stepwise from the greatest depth to the top, Therefore, this method is particularly suitable for a Application in wells and water wells, whose Water yield has decreased, for example, halved and groundwater over several dozens Meter depth difference from a hydrous Soil layer is sucked.

Die Erfindung betrifft weiter Abpumpmittel zur Entfernung aus einem Wasserbrunnen von z.B. im Wasser in Suspension gegangene lose Teilchen oder von im Wasser aufgelöste Produkte, aus sowohl der um den Wasserbrunnen vorhandenen wasserhaltigen Erdschicht als auch aus den nahe der wasserhaltigen Erdschicht im Brunnen vorhandenen Filtermitteln, welche Abpumpmittel aus einem Absaugrohr bestehen, an dem nahe dem unteren Ende zwei parallel zu einander und auf einem gegenseitigen Abstand zu einander senkrecht auf dem Absaugrohr befestigte, flache plattenförmige Vorrichtungen, deren Außendurchmesser ungefähr dem Innendurchmesser des Steigrohrs entspricht, so daß ein geschlossener Raum gebildet wird, der seitlich von der Wand des Steigrohrs und sowohl an der Oberseite als auch an der Unterseite von den beiden plattenförmigen Vorrichtungen begrenzt wird, welches Absaugrohr eine oder mehrere Einströmöffnungen hat, die sich in jenem Teil des Absaugrohrs befinden, welches sich im geschlossenen Raum zwischen den beiden plattenförmigen Vorrichtungen befindet und welche Vorrichtung Pumpmittel enthält, die das Wasser über das Absaugrohr aus dem Brunnen abführen können. Mit diesen Maßnahmen wird erreicht, daß alle Teilchen, die sich gelöst haben in Ruhe abgesaugt werden können, ohne daß die Teilchen in den Poren durch eine zu hohe Saugkraft festgesogen werden und dadurch wieder Verstopfungen verursachen würden.The invention further relates to evacuation means for removal from a well of e.g. in the water Suspension gone loose particles or from in the water dissolved products, both from around the water well existing hydrous soil layer as well near the hydrous soil layer in the well existing filter means which Abpumpmittel from a suction tube, at the near the lower end two parallel to each other and on one another Distance to each other perpendicular to the suction tube fastened, flat plate-shaped devices whose Outer diameter about the inner diameter of the Riser corresponds, so that a closed space is formed, the side of the wall of the riser and both at the top and at the bottom bounded by the two plate-shaped devices is, which suction pipe one or more inflow openings has, which is in that part of the suction tube located in a closed space between located the two plate-shaped devices and which device contains pumping means containing the water can be discharged from the well via the suction tube. These measures ensure that all particles, that have dissolved can be sucked off in peace, without the particles in the pores being too high Suction force are absorbed and thereby again Would cause blockages.

Dadurch, daß die Abpumpmittel im Absaugrohr nahe dem geschlossenen Raum, aber oberhalb der Einströmöffnungen des Absaugrohrs eine Zufuhr für Gas enthalten, oder weil im Absaugrohr ein Zuflußrohr für Gas angeordnet ist, welches in das Absaugrohr mündet, nahe, aber oberhalb der Einströmöffnungen des Absaugrohrs, wird erreicht, daß durch den Luftblasenfluß das Wasser mit den Teilchen sehr ruhig nach oben abgeführt wird und außerdem die in Suspension befindlichen Teilchen in Suspension bleiben. Eventuell kann noch eine Pumpe hinzugefügt werden.Characterized in that the Abpumpmittel in the suction tube near the enclosed space, but above the inlet openings the suction tube contain a supply for gas, or because arranged in the suction pipe, an inlet pipe for gas which is in the suction pipe, close, but above the inlet openings of the suction tube, is achieved that by the bubble flow with the water the particles are discharged very calmly upwards and also the suspended particles in Stay suspension. You may also have a pump to be added.

Anhand der Abbildung wird die Erfindung näher erläutert. In der Abbildung zeigt:

  • Fig. 1 zeigt einen Wassergewinnungsbrunnen im Querschnitt;
  • Fig. 2 bis 6 zeigen eine Reihe von Phasen des Verfahrens zur Verbesserung des Zuflusses des Wassers zum Brunnen;
  • Fig. 7 zeigt den Brunnen aus Fig. 1 in dem erfindungsgemäße Abpumpmittel dargestellt sind.
    • With reference to the figure, the invention will be explained in more detail. In the picture shows:
  • Fig. 1 shows a water extraction well in cross section;
  • Figs. 2 to 6 show a series of phases of the process for improving the inflow of water to the well;
  • Fig. 7 shows the well of Fig. 1 are shown in the Abpumpmittel invention.

    • Figur 1 zeigt einen Querschnitt einer Quelle oder eines Wassergewinnungsbrunnens 1. Dieser Brunnen 1 besteht aus einem Bohrloch 2 mit einem Durchmesser von 600 mm der bis gut 80 Meter Tiefe unter die Erdoberfläche 3 reicht. Auf dem Boden 4 des Bohrlochs 2 ist eine 4 Meter dicke Schicht 5 Lehm angebracht und darauf ein Steigrohr 6 aus PVC mit einem Durchmesser von 250 mm. Der Fuß des Steigrohrs besteht aus einem Sandfang 7, welcher nach unten hin verschlossen ist und dessen stehende Wand 8 ungefähr 1 Meter beträgt. Ab 75 Meter bis 40 Meter Tiefe ist der Teil 9 der Wand 8 des Steigrohrs versehen mit Filterschlitzen oder Perforationen 10 mit einem Durchmesser von 0,75 mm als Filter oder Sieb, durch das das Wasser in das Steigrohr 6 strömen kann, während der restliche obere Teil 11 des Steigrohrs 6 aus einer für Wasser undurchdringbaren Wand 12 besteht. Zwischen der Bohrwand 13 des Bohrlochs 2 und dem Filterteil 9 des Steigrohrs 6, welches Perforationen enthält, also von ungefähr 76 Metern bis 38 Meter Tiefe, ist das Bohrloch mit speziellem Filterkies mit Filterqualität gefüllt, dessen Durchmesser zwischen 1,0 mm und 1,6 mm beträgt, welches gemeinsam mit dem Filterteil 9 des Steigrohrs 6 den Filter 14 für das zufließende Wasser bildet. Von ungefähr 38 Metern bis 25 Meter Tiefe ist das Steigrohr von einer bestimmten Sorte Lehm 15 umgeben, welcher dadurch eine für Wasser undurchdringbare Schicht bildet und in der Verlängerung der undurchdringbaren Bodenschicht 16, welche die Oberseite der wasserhaltigen Erdschicht 17 begrenzt. Ab 38 Meter bis ungefähr 6 Meter unter der Oberfläche ist das Bohrloch mit Kies 18 mit einem Durchmesser, der zwischen 2,0 und 5,0 mm beträgt, aufgefüllt. Anschließend ist noch eine Lehmschicht 19 von 3 Metern angebracht und das Bohrloch bis oben weiter mit Kies 20 gefüllt.Figure 1 shows a cross section of a source or a Water extraction well 1. This well 1 consists from a borehole 2 with a diameter of 600 mm up to a depth of 80 meters below the earth's surface 3 enough. On the bottom 4 of the borehole 2 is a 4 Meter thick layer 5 loam attached and on it Riser 6 made of PVC with a diameter of 250 mm. The foot of the riser consists of a sand trap 7, which is closed at the bottom and whose standing wall 8 is about 1 meter. From 75 meters to 40 meters depth is the part 9 of the wall 8 of the riser provided with filter slots or perforations 10 with a diameter of 0.75 mm as a filter or Sieve, through which the water flow into the riser 6 can while the remaining upper part 11 of the riser 6 from a water-impermeable wall 12 consists. Between the bore 13 of the borehole 2 and the filter part 9 of the riser 6, which perforations contains, so from about 76 meters to 38 meters Depth, is the borehole with special filter gravel with Filter quality filled, the diameter between 1.0 mm and 1.6 mm, which together with the Filter part 9 of the riser 6, the filter 14 for the inflowing water forms. From about 38 meters to 25 meters depth is the riser of a certain Variety loam 15 surrounded, which thereby one for water impenetrable layer forms and in the extension the impermeable bottom layer 16, which the Top of the hydrous soil layer 17 limited. From 38 meters to about 6 meters below the surface the borehole with gravel 18 with a diameter that between 2.0 and 5.0 mm, filled up. Then there is a clay layer 19 of 3 meters attached and the hole further up with gravel 20 filled.

    Die Figuren 2 bis 6 zeigen eine Reihe von Phasen des Verfahrens zur Verbesserung des Zuflusses des Wassers zum Brunnen. Figur 2 zeigt schematisch denselben Wassergewinnungsbrunnen aus Figur 1, wobei das Steigrohr durch eine Absperrvorrichtung 21, auch bekannt unter dem Namen "Packer", durch die das Zufuhrrohr 22 ragt, verschlossen ist, während sowohl über als unter dem Absperrvorrichtung Wasser im Steigrohr 6 steht. Das Zufuhrrohr 22 für das Kohlendioxyd steckt so tief im Wassergewinnungsbrunnen oder Brunnen 1, daß die Ausströmöffnung 23 des Zufuhrrohrs 22 sich in der gewünschten Tiefe im Wassergewinnungsbrunnen 1 befindet. Figur 3 zeigt schematisch denselben Wassergewinnungsbrunnen 1 während des Zuführens von Kohlendioxyd in den Brunnen, wobei die Temperatur des Kohlendioxydgases nicht so wichtig ist, da das Wasser im Brunnen eine große Wärmeleistung hat und erst frieren wird, nachdem das Wasser im Brunnen durch gasförmiges Kohlendioxyd ersetzt wurde. Figur 4 zeigt schematisch denselben Wassergewinnungsbrunnen, nachdem das Wasser bis unter die Ausströmöffnung 23 gedrückt wurde und bevor der Brunnen eingefroren wird. Schematisch ist mit einer gezogenen Linie 24 ungefähr dargestellt, welcher Teil des Brunnens und des umringenden Filters 14 sich mit dem Gas gefüllt hat. Figur 5 zeigt denselben Wassergewinnungsbrunnen, nachdem im unteren verschlossenen Teil des Wassergewinnungsbrunnens während längerer Zeit Kohlendioxyd eingebracht wurde, dessen Temperatur unter dem Gefrierpunkt von Wasser liegt und bevor der Brunnen aufgetaut wird, wobei schematisch mit einer gestrichelten Linie 25 der Teil des Brunnens, der umgebende Filter 14 und die umringende wasserhaltige Erdschicht 17 dargestellt ist, die sich unter dem Gefrierpunkt des Wassers befindet, bevor der Brunnen aufgetaut wird. Figur 6 zeigt schematisch denselben Wassergewinnungsbrunnen, wobei das Verfahren auf einer anderen Tiefe im Brunnen angewendet wird und derselbe Zustand dargestellt wird wie in Figur 5.
    Figur 7 zeigt denselben Brunnen wie in Figur 1 dargestellt, wobei im Brunnen 1 Abpumpmittel 26 eingebracht sind, zum stufenweisen, allmählichen Abpumpen des Wassers mit den darin gelösten Stoffen und den sich in Suspension befindlichen Teilchen aus dem den Brunnen umgebenden Filter 14 und der wasserhaltigen Erdschicht 17. Die Abpumpmittel bestehen aus einem Absaugrohr 27, an dem nahe dem unteren Ende zwei parallel zu einander und auf einem gegenseitigen Abstand zu einander senkrecht auf dem Abzugrohr befestigte, flache plattenförmige Vorrichtungen 28 und 29, deren Außendurchmesser ungefähr dem Innendurchmesser des Steigrohrs 6 entspricht, so daß damit ein geschlossener Raum gebildet wird, der seitlich von der Wand des Steigrohrs 6 und an der Oberseite von der einen plattenförmigen Vorrichtung, und an der Unterseite von der anderen plattenförmigen Vorrichtung begrenzt wird. Das Absaugrohr 27 hat eine Reihe von Einströmöffnungen 30. Im Absaugrohr über den plattenförmigen Vorrichtungen ist eine Zufuhr 31 für Gas angebracht, womit es möglich ist, sehr allmählich Wasser mit in Suspension gebrachten Teilchen abzuführen. Der Teil des Brunnens 1 über der plattenförmigen Vorrichtung 28 und dem Teil des Brunnens 1 unter der plattenförmigen Vorrichtung 29 sind unter einander durch ein Röhrchen 32 verbunden, damit die Abpumpmittel 26 leicht im Steigrohr des Brunnens versetzt werden können.    Figures 2 to 6 show a number of phases of the process for improving the inflow of water to the well. Figure 2 shows schematically the same water extraction well of Figure 1, wherein the riser is closed by a shut-off device 21, also known under the name "Packer" through which the supply pipe 22, while both above and below the shut-off water in the riser 6. The supply pipe 22 for the carbon dioxide is so deep in the water production well or well 1 that the discharge port 23 of the supply pipe 22 is located at the desired depth in the water production well 1. Figure 3 shows schematically the same water well 1 during the feeding of carbon dioxide into the well, the temperature of the carbon dioxide gas is not so important because the water in the well has a high thermal output and will freeze only after the water in the well has been replaced by gaseous carbon dioxide , Figure 4 shows schematically the same water extraction well, after the water has been pushed below the outflow opening 23 and before the well is frozen. Schematically, a solid line 24 approximately indicates which part of the well and the surrounding filter 14 has filled up with the gas. FIG. 5 shows the same water extraction well after carbon dioxide has been introduced for a long time in the lower closed part of the water production well, the temperature of which is below the freezing point of water and before the well is thawed, schematically with a dashed line 25 the part of the well, the surrounding filter 14 and the surrounding hydrous soil layer 17 is shown, which is below the freezing point of the water before the well is thawed. FIG. 6 schematically shows the same water extraction well, the process being applied at a different depth in the well and showing the same state as in FIG. 5.
    Figure 7 shows the same well as shown in Figure 1, wherein in the well 1 Abpumpmittel 26 are introduced for gradual, gradual pumping out of the water with the substances dissolved therein and the particles in suspension from the surrounding the fountain filter 14 and the hydrous soil layer 17. The Abpumpmittel consist of a suction tube 27, at the near the lower end of two parallel to each other and at a mutual distance to each other vertically mounted on the exhaust pipe, flat plate-shaped devices 28 and 29 whose outer diameter corresponds approximately to the inner diameter of the riser 6, thus forming a closed space bounded laterally by the wall of the riser 6 and at the top by the one plate-shaped device and at the bottom by the other plate-shaped device. The suction pipe 27 has a series of inflow openings 30. In the suction pipe above the plate-shaped devices, a supply 31 for gas is attached, whereby it is possible to remove very gradually water with suspended particles. The part of the well 1 above the plate-shaped device 28 and the part of the well 1 below the plate-shaped device 29 are connected to each other by a tube 32 so that the pumping 26 can be easily offset in the well of the well.

    Claims (6)

    1. Method for improving the supply of water from a water-containing earth layer to a source or well (1), in particular water procurement well (1), formed in the ground, the said source or well (1) consisting of a borehole (2) which extends into the abovementioned earth layer or into the ground water,
      first, the well (1) or part of the well (1) being closed by shut-off means, so that the lower part of the well (1) is closed upwardly in an airtight manner and can be put under pressure, the said shut-off means containing a shut-off device (21) which is fastened on or in the cladding pipe or riser pipe of the well and closes this in an airtight manner, the said shut-off device (21) containing an inflow pipe (22), so that a material (such as a gas, a liquid or a solid) can be supplied under a desired pressure into the upwardly closed lower part of the well (1), the shut-off means (21) first being arranged in the well (1),
      subsequently, the shut-off device being fastened in or on the well (1) in an airtight manner,
      subsequently, carbon dioxide being introduced through the inflow pipe (22) under a defined pressure which lies above the pressure of the hydrostatic pressure prevailing at the outflow orifice (23) of the inflow pipe (22),
      a material changing into the solid phase,
      and, subsequently, the pressure being removed from the well (1),
      characterized
      in that, in the arrangement of the shut-off means (21), the inflow pipe (22) projects into the well (1) to a depth such that it issues in the well (1) at a depth which lies in the water-containing earth layer,
      in that, in the first filling step, carbon dioxide is conducted in the gaseous state into the lower part of the well (1), until the well (1) is filled with gas to below the outflow orifice (23) of the inflow pipe (22),
      in that, thereafter, for a defined period of time, carbon dioxide is added through the inflow pipe (22) under the same abovementioned defined pressure, with the result that, under the pressure prevailing near the end of the pipe (22) and the prevailing temperature, the water located near the end of the pipe (22) and the earth layer gradually change, over a defined distance from the outflow orifice (23) of the inflow pipe (22), into the solid phase, that is to say freeze,
      and in that, subsequently, after the well (1) is thawed out, the well (1) is pumped out for a defined period of time by pumping-out means (26), in order to remove the dissolved fine particles and materials together with the pumping water.
    2. Method according to Claim 1, characterized in that the carbon dioxide which is introduced into the well (1) and serves for gradually freezing the well (1) consists partially of gaseous and partially of liquid carbon dioxide.
    3. Method according to Claim 1 or 2, characterized in that the method is applied at a plurality of depths within the water layer in the well (1).
    4. Method according to Claim 3, characterized in that the method is applied in the well (1) first at the greatest depth and then in steps from the bottom upwards.
    5. Method according to one of Claims 1, 2, 3 or 4, characterized in that the carbon dioxide which is introduced into the well (1) in order to freeze the well (1) consists partially of gaseous and partially of liquid carbon dioxide.
    6. Method according to one of Claims 1, 2, 3, 4 or 5, characterized in that the water-containing layer surrounding the well and the filter means located in the well (1) are sucked away in steps from the top downwards by the pumping-out means (26).
    EP01988816A 2000-10-09 2001-10-09 Method and pumping out means for improving the supply of water to a source or a water procurement well Expired - Lifetime EP1327053B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    NL1016358A NL1016358C2 (en) 2000-10-09 2000-10-09 Method and pumping means for improving the supply of water to a source or water extraction well.
    NL1016358 2000-10-09
    PCT/EP2001/011671 WO2002035061A2 (en) 2000-10-09 2001-10-09 Method and pumping out means for improving the supply of water to a source or a water procurement well

    Publications (2)

    Publication Number Publication Date
    EP1327053A2 EP1327053A2 (en) 2003-07-16
    EP1327053B1 true EP1327053B1 (en) 2005-12-14

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    ID=19772213

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01988816A Expired - Lifetime EP1327053B1 (en) 2000-10-09 2001-10-09 Method and pumping out means for improving the supply of water to a source or a water procurement well

    Country Status (6)

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    EP (1) EP1327053B1 (en)
    AT (1) ATE313002T1 (en)
    AU (1) AU2002220606A1 (en)
    DE (1) DE50108403D1 (en)
    NL (1) NL1016358C2 (en)
    WO (1) WO2002035061A2 (en)

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2259262A (en) * 1940-11-12 1941-10-14 Layne & Bowler Inc Means for well cleaning
    US4580629A (en) 1984-12-27 1986-04-08 Igor Jaworowsky Method and apparatus for water flow stimulation in a well
    US4534413A (en) 1984-12-27 1985-08-13 Igor Jaworowsky Method and apparatus for water flow stimulation in a well
    US4763728A (en) * 1987-07-16 1988-08-16 Lacey James J Jet-type well screen cleaner
    US5394942A (en) * 1993-11-02 1995-03-07 Aqua Freed Of New York, Inc. Method for stimulation of liquid flow in a well
    US6047773A (en) * 1996-08-09 2000-04-11 Halliburton Energy Services, Inc. Apparatus and methods for stimulating a subterranean well

    Also Published As

    Publication number Publication date
    WO2002035061A2 (en) 2002-05-02
    ATE313002T1 (en) 2005-12-15
    DE50108403D1 (en) 2006-01-19
    EP1327053A2 (en) 2003-07-16
    WO2002035061A3 (en) 2002-09-06
    AU2002220606A1 (en) 2002-05-06
    NL1016358C2 (en) 2002-04-16

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