WO2005007980A1 - Puits, et procede de regeneration d'un puits - Google Patents

Puits, et procede de regeneration d'un puits Download PDF

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Publication number
WO2005007980A1
WO2005007980A1 PCT/EP2003/007714 EP0307714W WO2005007980A1 WO 2005007980 A1 WO2005007980 A1 WO 2005007980A1 EP 0307714 W EP0307714 W EP 0307714W WO 2005007980 A1 WO2005007980 A1 WO 2005007980A1
Authority
WO
WIPO (PCT)
Prior art keywords
standpipe
well
water
filter tube
area
Prior art date
Application number
PCT/EP2003/007714
Other languages
German (de)
English (en)
Inventor
Magdalena Rotthäuser
Original Assignee
Exploration Drilling International Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exploration Drilling International Gmbh filed Critical Exploration Drilling International Gmbh
Priority to PCT/EP2003/007714 priority Critical patent/WO2005007980A1/fr
Priority to US10/564,514 priority patent/US20060157237A1/en
Priority to EP03817507A priority patent/EP1644590A1/fr
Priority to AU2003257469A priority patent/AU2003257469A1/en
Priority to DE10394249T priority patent/DE10394249D2/de
Publication of WO2005007980A1 publication Critical patent/WO2005007980A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
    • E03B3/08—Obtaining and confining water by means of wells
    • E03B3/15—Keeping wells in good condition, e.g. by cleaning, repairing, regenerating; Maintaining or enlarging the capacity of wells or water-bearing layers
    • 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

Definitions

  • the invention relates to a well for the extraction, observation and / or lowering of groundwater, with a standpipe having at least one filter pipe area, and with at least one pump arranged in the standpipe. Furthermore, the present invention relates to a method for regenerating a well provided for the extraction, observation and / or lowering of ground water.
  • a major disadvantage of the well-known wells is that they often only have a comparatively short lifespan. This results from the fact that a filter cake forms on the filter tube area after some operating time. At the same time, the fine pores and capillaries in the filter gravel are clogged by particles in the groundwater. This leads to a decrease in the amount of water obtained per unit of time with constant pumping power.
  • backwashing This is not only expensive in terms of equipment. Backwashing also leads to particles loosening from the filter cake, pressed into the mountains and thus hindering the inflow of water during subsequent pumping.
  • Another disadvantage of the known wells is that, particularly in wells in areas in which agricultural use also takes place, excessive nitrate values occur in the required groundwater.
  • other contaminants such as salt water, can affect the groundwater. This results from the fact that when the groundwater is pumped out of the water-bearing layer in question, so-called extraneous water, ie water from other layers, is also pumped out.
  • the object of the present invention is therefore to provide a well of the type mentioned at the outset and a method for regenerating a well, the regeneration of the well being intended to be simple and inexpensive to carry out.
  • the previously derived object is achieved according to the invention in a well of the type mentioned at the outset in that a spraying device for spraying the filter tube area and / or the well area adjacent to the filter tube area is assigned to the filter tube area and in that the spraying device has at least one pressure line for Supply of the spraying device is connected to a medium to be sprayed.
  • the invention offers a number of advantages, some of which are significant. First of all, the invention makes it possible to increase the life of a well considerably. By means of the spraying device it is possible to loosen a filter cake located on the filter tube area and to loosen up the gravel layer surrounding the filter tube area as an adjacent well area to such an extent that particles which clog pores and capillaries in the filter gravel layer are discharged.
  • the spray device It is crucial that it is possible via the spray device, to supply the medium in a very targeted manner only to the areas to be regenerated, so that the indentation of particles into the water-bearing layer can be at least substantially avoided. Since the spraying device is completely independent of the pump of the well, the spraying and thus regeneration of the well can also take place during pumping. Particles that become detached and other contaminations due to the spraying are prompted via the pump without clogging the surrounding mountains. In addition, it is possible with the invention to supply a wide variety of media to the spraying device through the pressure line, which ends above ground.
  • the supplied medium can serve both for regeneration, that is to say for cleaning the filter tube area and the filter bed, and also for water treatment if gases such as ozone and / or liquid water treatment agents, in some cases also with solid matter such as water with charcoal dust the pressure line of the spraying device are supplied.
  • the spraying device has at least one ring channel attached to the filter tube area.
  • This ring channel is distributed over its length with a large number of nozzles through which the medium is fed.
  • the distance between the individual nozzles is preferably chosen such that sufficient removal of the filter cake on the filter tube area and sufficient loosening of the filter gravel layer are readily possible. It is also the case that, in the case of a comparatively long filter tube area, two or more ring channels can also be provided, which are then sufficiently far apart in the axial direction to ensure adequate regeneration of the entire lower well area.
  • annular spraying means instead of an annular spraying means, it is of course also possible to provide a plurality of individual spraying points which are arranged distributed over the circumference of the filter tube area.
  • Good regeneration values ie detachment of the filter cake at the filter tube area and loosening of the adjacent filter gravel layer, are preferably achieved by a part of the nozzles being parallel to the tube axis, preferably immediately adjacent to the wall of the filter tube area or in a point Angles are aligned. Horizontal alignment of the nozzles is also possible. However, this can lead to particles being pressed into the neighboring mountains, which can affect the groundwater supply.
  • the nozzles are adjustable.
  • An adjustment can be achieved, for example, by pivoting the nozzle out of a basic position when the spraying device is pressurized as a function of the pressure.
  • the nozzles it is also possible for the nozzles to rotate about an axis lying on the ring circumferential axis of the ring channel when pressure is applied.
  • the nozzles can basically be designed as simple openings in the ring channel. However, in order to avoid clogging of the individual nozzles by particles and thus a loosening or sintering, the nozzles at least partially each have a valve, in particular a spring-loaded check valve. As a result, the individual nozzles are closed in the non-pressurized state.
  • the check valves only open at a predetermined minimum pressure which results when the spraying device is pressurized, in order to close again immediately after the pressurization has ended. Ultimately, this ensures permanent and trouble-free operation of the spraying device.
  • the spraying device can have one or more ring channels depending on the length of the filter tube area. If only one ring channel is required, it is advisable for the spraying device to have a base plate which is connected to the ring channel and which closes off the filter tube region at the bottom. The spraying device or the annular channel thus forms the lower end of the pipe string. In this embodiment, the nozzles of the ring channel should not be directed downwards in order to prevent the floor from being rinsed out at this point.
  • both the ring channel and the pressure line supplying the medium z should be made of plastic or stainless steel and should preferably be attached to the outside of the standpipe.
  • the external fastening ultimately ensures that when the pump is pulled there can be no contact between the pump and the pressure line, which could damage both the pump and the pressure line.
  • an outlet is provided on the well head with which the pump line of the pump communicates.
  • This outlet has a valve designed in such a way that the water pumped by the pump is not discharged via the usual water discharge line, but exclusively via the outlet.
  • a motor drive should be assigned to the outlet, via which the outlet is automatically opened after or during a spraying operation and the drained water is drained off without the need to dismantle the well head, remove the pump or take any other measures.
  • the fountain according to the invention is assigned a feed device for feeding the liquid and / or gaseous medium to the spraying device.
  • This feed device is connected to the pressure line at its surface end.
  • the supply device is preferably designed such that the medium is supplied to the spraying device either under constant pressure or via pressure surges.
  • the feed device has a pressure limiter so that certain maximum pressures cannot be exceeded.
  • it is particularly useful for automatic operation of the spraying device that the feed device has a timer. As a result, spraying can take place over a precisely specified period of time without the need to monitor an operator.
  • the feed device is coupled to the outlet or its control in such a way that, depending on the spraying, water is automatically removed from the outlet for a predetermined time interval.
  • the standpipe is arranged in an outer standpipe, that the outer standpipe is firmly connected to the surrounding mountains and that the standpipe is designed to be pullable from the outer standpipe.
  • the result is a double-headed design of the well with an inner and an outer standpipe. While the outer standpipe is firmly connected to the Geb ge in a manner known per se, the inner standpipe, on which the lower filter pipe area is located, can easily be pulled for surface regeneration, which is not possible with conventional wells.
  • the lower filter tube area can be cleaned for days after pulling the inner standpipe.
  • the collapsed filter gravel is rinsed out of the borehole itself, which is kept open further via the outer standpipe. Then the inner standpipe with the cleaned or a new filter pipe area can be reinserted into the outer standpipe. The required amount of filter gravel is then introduced into the annular space between the outer and the inner standpipe. The fountain can then continue to be operated.
  • the regeneration described above can easily be carried out by the user of the well himself, so that a corresponding specialist company for carrying out the regeneration is not absolutely necessary.
  • the spraying device described at the outset offers particular advantages, particularly in connection with the double-tube design of the fountain, since the possible drawing of the inner tube only has to be carried out very rarely.
  • the spraying device is then fastened to the inner pipe string, namely to the filter pipe area, in the manner described above.
  • the filter pipe area of the inner standpipe string projects beyond the lower end of the outer standpipe.
  • the outer standpipe extends to the respective water-bearing layer and thus stabilizes the borehole from above to the water-bearing layer. Demge- opposite the inner pipe string with the filter pipe area protrudes into the water-bearing layer, so that the promotion can take place.
  • the necessary filter gravel in the area of the filter tube area via this annular space spacers are provided. These can be attached to the inner and / or the outer standpipe.
  • the pressure line should preferably be received between two spacers which have a greater extent in the radial direction than the pressure line, so that in this case the spacers have an additional protective function for the pressure line. It is understood that a plurality of corresponding spacers are provided in the axial direction over the pipe string.
  • the invention provides that the outer standpipe is sealed from the surrounding mountains by a hydraulic mineral binder in such a way that groundwater is obtained only from the water-bearing layer in which the filter tube area is located, and a water inflow avoided from other layers w d.
  • the invention differs from the prior art in that the hydraulic binders used in the prior art are used only for fastening the outer standpipe in the borehole.
  • the hydraulic binders used in the prior art are used only for fastening the outer standpipe in the borehole.
  • there is no adequate sealing between the rock and the outer standpipe which leads to an inflow of contaminated foreign water through the insufficiently sealed annular space between the outer standpipe and the adjacent rock when the pump is operated.
  • a seal between the outer standpipe and the mountains are restored, the original state of the mountains is restored.
  • the water-bearing layer from which the water is obtained is sealed off from other horizons in the area of the ingraum.
  • a lowering funnel extending into other layers around the well, as is customary in the prior art, is avoided in the invention.
  • the fresh water obtained retains its original quality.
  • the present invention can be used not only for the extraction of groundwater from a water horizon, but also in several water horizons.
  • the outer standpipe or the standpipe string is divided and releases the respective water-bearing layers. Filter tube areas are provided in the water-bearing layers, through which groundwater is obtained. Otherwise, the outer standpipe string is sealed in the manner described above.
  • the binder has a highly and permanently plastic behavior in the set state, that is to say is extremely viscous. This ensures that there is no destruction of the well or of the binder layer, particularly in areas where earth movements occur, which in turn can lead to an inflow of contaminated foreign water.
  • a water / solid mixture based on marl has proven to be the most sealing binder, which also shows a highly and permanently plastic behavior.
  • the flowability in the not yet set state, but also the plastic behavior in the set state, is improved above all by adding a proportion of up to 30%, preferably around 20%, bentonite to the marl. It goes without saying that each individual value is possible in the specified interval from 0% to 30%.
  • FIG. 1 is a schematic cross-sectional view of a fountain according to the invention
  • Fig. 2 is an enlarged view of the lower well area
  • FIG. 3 shows a view corresponding to FIG. 1 of a further embodiment, in which groundwater is obtained from two water horizons.
  • a well 1 is shown, which in the present case is used for the extraction of groundwater.
  • wells of the type shown can also be used for observing or lowering groundwater.
  • the fountain 1 has a standpipe 2, which is referred to below as the inner standpipe.
  • a filter tube area 3 connects to the inner standpipe 2 and is used to extract the groundwater.
  • the filter tube area 3 has perforations, the opening width of which is smaller than the filter gravel of the filter gravel jacket 5, which is arranged around the filter tube area 3.
  • the inner standpipe 2 in the present case is a pipe string made up of a plurality of individual pipe pieces which are attached to one another.
  • the Filte ⁇ Ohr Society 3 is a separate piece of pipe that is connected to the pipe string. It goes without saying that it is also possible in the case of short standpipes that the pipe string consists of only one piece, and the filter pipe area 3 can also be formed in one piece with the standpipe. In the following, only the term "standpipe" is used, regardless of whether this standpipe has one or more pipe sections.
  • a spraying device 9 is assigned to the filter tube area 3, via which the filter tube area 3 and / or the filter gravel jacket 5 can be sprayed in order to regenerate this area.
  • the spray device 9 is connected to a pressure line 10 for supplying the spray device 9 with a medium to be sprayed.
  • the spraying device 9 in the embodiment shown has an annular channel 11 fastened to the filter tube area 3 and having a plurality of nozzles 12.
  • filter tube regions 3 which have a greater length than shown in FIG. 1, can also be provided a plurality of ring channels which are connected to the pressure line 10.
  • the nozzles 11 are aligned parallel to the tube axis adjacent to the wall of the filter tube region 3.
  • the nozzles 12 each have a spring-loaded check valve 13, which is only indicated schematically. This prevents filter gravel or other particles from penetrating and clogging of the nozzle 11.
  • the spraying device has a base plate 13 which is placed on the end of the filter tube region 3.
  • the spraying device 9 thus forms the lower end of the inner standpipe strand.
  • the spraying device 9 itself, like the pressure line 10, is made of stainless steel in order to ensure permanent operation.
  • the pressure line 10 is attached to the outside of the inner standpipe 2, which is not shown in detail.
  • the pump line 7 of the pump 6 communicates with an outlet 14 on the well head 8.
  • the outlet 14 is a discharge line through which the groundwater can be discharged. If there is no drainage of the groundwater via the outlet, which is the rule, the groundwater is fed via the groundwater line 15 to its further use.
  • the pump line 7, the outlet 14 and the groundwater line 15 are connected to one another via a three-way valve 16. Via the three-way valve 16, the groundwater obtained can be drained off before, during or after a spraying operation, without having to dismantle the well head 8, expand the pump 6 or interrupt the groundwater line 15.
  • the pressure line 10 is provided with a supply device 17 arranged above ground for supplying the medium to the spraying device 9.
  • Gases or liquids, which can also contain solids, can be supplied as the medium.
  • ozone can be used to kill microorganisms or others
  • Water treatment agents for influencing the water quality are supplied via the feed device 17.
  • the spraying device 9 can thus perform a double function, namely on the one hand to clean or regenerate the filter tube area 3 and the filter gravel jacket 5 and on the other hand to influence the drinking water quality.
  • the feed device 17 itself can be designed to feed the medium under constant pressure. It is also possible to generate pressure surges via the feed device 17 at regular or irregular intervals.
  • the feed device 17 has a corresponding pump 18.
  • a pressure limiter 19 is provided in order to avoid unintended overpressures.
  • the feed device 17 has a timer 20 in order to carry out the spraying and thus the regeneration only over a predetermined period, which enables automatic operation.
  • both the feed device 17 and the outlet 14 or the three-way valve 16 are coupled to a controller 21, so that, depending on the spraying, groundwater is automatically discharged from the outlet 14 for a predetermined time interval results.
  • the valve 16 in the present case has a motor drive (not shown). This makes it possible to open the valve 16 for a predetermined time interval for the discharge of extracted groundwater via the outlet 14, specifically at the start of the spraying or at a predetermined time after the spraying has started.
  • the duration of the time interval for draining the water through the outlet 14 depends on empirical values.
  • the controller 21 is assigned a corresponding monitoring sensor, via which the water quality is monitored. As soon as the water quality is sufficient, the valve 16 switches over again and the water is returned to its further use via the groundwater line 15.
  • valve 16 can be a manually operated valve.
  • the controller 21 is then not required.
  • the inner standpipe 2 is arranged in an outer standpipe 22.
  • the outer standpipe 22 is arranged in an outer standpipe 22.
  • the inner standpipe 2 can be pulled out of the outer standpipe 22.
  • the inner standpipe 2 which otherwise has no fixed connection with the outer standpipe 22, can then be pulled.
  • the outer standpipe 22 ensures that the borehole is kept open. 1 and 3, the filter tube area 3 projects beyond the lower end of the outer standpipe 22, so that the extraction of the groundwater via the filter tube area of the inner standpipe 2 can take place unaffected by the outer standpipe 22.
  • spacers (not shown) are provided on the outside thereof, which ensure that the inner standpipe 2 is arranged essentially centrally in the outer standpipe 22, although this is not clearly shown in the figures.
  • the radial extension of the spacers is larger than the outside diameter of the pressure line 10, so that an additional protective effect for the pressure line 10 results from the spacers.
  • the outer standpipe 22 is sealed with the surrounding mountains 23 via a hydraulic mineral binding agent 24 in such a way that groundwater only consists of the water-bearing layers (in FIG. 1) or A and B (in FIG 3) in which the filter tube area 3 is located, while a water inflow of extraneous water from other layers is avoided.
  • the binder 24 is one that exhibits a highly and permanently plastic behavior after setting.
  • a water-solid mixture on a natural basis with a predominant proportion of fine-grained marl with a small proportion of approximately 20% fine-grained bentonite serves as the hydraulic binder.
  • the embodiment shown in FIG. 3 differs from that shown in FIG. 1 in that the inner pipe string 3 has two filter pipe regions 3 in different horizons.
  • groundwater is extracted from water-bearing layers A, B. It goes without saying that a plurality of filter tube areas is also possible.
  • the regeneration of the well 1 shown in FIGS. 1 and 3 takes place in such a way that a regeneration medium, for example water, is first supplied under pressure via the feed device 17.
  • a regeneration medium for example water
  • Pressure surges are generated which act on the filter gravel casing 5 on the one hand and on the outside of the filter pipe area 3 on the other hand, so that blockages in the pores and capillaries of the filter gravel casing 5 and on the perforations 4 of the filter pipe area 3 are released.
  • the pump 6 remains in pump mode, so that the dissolved particles are removed.
  • the valve 16 is set via the control 21 in such a way that the ground water contaminated due to the regeneration of the lower well area is discharged via the outlet 14. After the end of the spraying and a subsequent predetermined time interval, the valve 16 is moved into its basic position, the outlet 14 being closed and the access to the groundwater line 15 being opened again.
  • groundwater is obtained only from horizon A, but not from other horizons.
  • the inner standpipe 2 is pulled together with the filter tube area 3, the spraying device 9 and the pressure line 10.
  • the well head 8 is first removed and the pump 6 is pulled.
  • the filter gravel casing 5 collapses and can be rinsed out.
  • the inner standpipe can again be introduced into the outer standpipe 22 together with the pressure line 10 of the spraying device 9.
  • the required amount of filter gravel is then introduced through the annular space provided between the inner and the outer standpipe, which is kept open by the spacers. After insertion the pump and completion of the well by placing the well head, the well 1 can continue to be operated.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Filtration Of Liquid (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

L'invention concerne un puits (1) servant à extraire une eau souterraine, à surveiller une eau souterraine et/ou à faire baisser le niveau d'une eau souterraine. Ce puits comprend : un tuyau vertical (2) comportant au moins une zone tubulaire de filtrage (3), et ; au moins une pompe (6) qui est disposée dans le tuyau vertical (3). L'objectif de cette invention est de concevoir un puits pouvant être régénéré de manière simple et peu onéreuse. A cet effet, un dispositif d'aspersion (9) est associé à la zone tubulaire de filtrage (3) pour asperger cette zone tubulaire de filtrage (3) et/ou la zone de puits adjacente à ladite zone tubulaire de filtrage (3). En outre, le dispositif d'aspersion (9) est relié à au moins une conduite sous pression (10) servant à alimenter ledit dispositif d'aspersion (9) à l'aide d'une substance à vaporiser.
PCT/EP2003/007714 2003-07-16 2003-07-16 Puits, et procede de regeneration d'un puits WO2005007980A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/EP2003/007714 WO2005007980A1 (fr) 2003-07-16 2003-07-16 Puits, et procede de regeneration d'un puits
US10/564,514 US20060157237A1 (en) 2003-07-16 2003-07-16 Well and method for regenerating a well
EP03817507A EP1644590A1 (fr) 2003-07-16 2003-07-16 Puits, et procede de regeneration d'un puits
AU2003257469A AU2003257469A1 (en) 2003-07-16 2003-07-16 Well, and method for regenerating a well
DE10394249T DE10394249D2 (de) 2003-07-16 2003-07-16 Brunnen und Verfahren zur Regenerierung eines Brunnens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/007714 WO2005007980A1 (fr) 2003-07-16 2003-07-16 Puits, et procede de regeneration d'un puits

Publications (1)

Publication Number Publication Date
WO2005007980A1 true WO2005007980A1 (fr) 2005-01-27

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ID=34072434

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/007714 WO2005007980A1 (fr) 2003-07-16 2003-07-16 Puits, et procede de regeneration d'un puits

Country Status (5)

Country Link
US (1) US20060157237A1 (fr)
EP (1) EP1644590A1 (fr)
AU (1) AU2003257469A1 (fr)
DE (1) DE10394249D2 (fr)
WO (1) WO2005007980A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007033704A1 (fr) * 2005-09-22 2007-03-29 Edi Exploration Drilling International Gmbh Puits pourvu d'un dispositif de remplacement du lit filtrant
ITPI20080108A1 (it) * 2008-10-14 2010-04-15 Nicola Cempini Metodo e dispositivo di manutenzione di un pozzo e struttura di pozzo che attua tale metodo
CN103266644A (zh) * 2013-03-26 2013-08-28 西安建筑科技大学 一种与水库取水塔主塔结合规避藻类的装置
EP2952640A1 (fr) * 2014-06-02 2015-12-09 Teftorec GmbH Dispositif d'activation ou de nettoyage de puits
EP3061875A1 (fr) * 2015-02-26 2016-08-31 Teftorec GmbH Dispositif et procede d'activation ou de nettoyage de puits
RU2650515C1 (ru) * 2017-09-08 2018-04-16 Федеральное государственное бюджетное образовательное учреждение высшего образования " Юго-Западный государственный университет" (ЮЗГУ) Способ регенерации скважин на воду

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IT1392346B1 (it) * 2008-12-17 2012-02-28 Scardigli Metodo di rigenerazione di un pozzo

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US2276401A (en) * 1940-03-18 1942-03-17 Layne & Bowler Inc Well cleaning apparatus
DE919520C (de) * 1952-09-02 1954-10-25 Dipl Berging Georg Zaensler Filterboden fuer Kiesschuettungsbrunnen
DE916636C (de) * 1952-09-27 1954-08-12 Otto Kriegbaum Verfahren zur Auflockerung von Boden- und Filterschichten zwecks Erhoehung ihrer Durchlaessigkeit
AT1379U1 (de) * 1996-03-21 1997-04-25 Meister Gerhard Verfahren zur entsandung oder reinigung eines brunnens
DE10023454A1 (de) * 2000-05-12 2001-11-29 Pumpenboese Gmbh & Co Kg Verfahren zur Vermeidung von Inkrustationen bei Brunnen zur Wasserförderung sowie Vorrichtung zur Durchführung des Verfahrens

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007033704A1 (fr) * 2005-09-22 2007-03-29 Edi Exploration Drilling International Gmbh Puits pourvu d'un dispositif de remplacement du lit filtrant
ITPI20080108A1 (it) * 2008-10-14 2010-04-15 Nicola Cempini Metodo e dispositivo di manutenzione di un pozzo e struttura di pozzo che attua tale metodo
CN103266644A (zh) * 2013-03-26 2013-08-28 西安建筑科技大学 一种与水库取水塔主塔结合规避藻类的装置
EP2952640A1 (fr) * 2014-06-02 2015-12-09 Teftorec GmbH Dispositif d'activation ou de nettoyage de puits
EP3061875A1 (fr) * 2015-02-26 2016-08-31 Teftorec GmbH Dispositif et procede d'activation ou de nettoyage de puits
RU2650515C1 (ru) * 2017-09-08 2018-04-16 Федеральное государственное бюджетное образовательное учреждение высшего образования " Юго-Западный государственный университет" (ЮЗГУ) Способ регенерации скважин на воду

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EP1644590A1 (fr) 2006-04-12
DE10394249D2 (de) 2006-06-08
AU2003257469A1 (en) 2005-02-04

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