EP0376422B1 - Method of cleaning well shafts - Google Patents

Method of cleaning well shafts Download PDF

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Publication number
EP0376422B1
EP0376422B1 EP89250124A EP89250124A EP0376422B1 EP 0376422 B1 EP0376422 B1 EP 0376422B1 EP 89250124 A EP89250124 A EP 89250124A EP 89250124 A EP89250124 A EP 89250124A EP 0376422 B1 EP0376422 B1 EP 0376422B1
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EP
European Patent Office
Prior art keywords
washing liquid
deposits
separated
measuring
cleaning
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP89250124A
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German (de)
French (fr)
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EP0376422A2 (en
EP0376422A3 (en
Inventor
Kerry F. Dipl.-Ing. Paul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Charlottenburger Motoren- und Geratebau KG Hw Paul
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Charlottenburger Motoren- und Geratebau KG Hw Paul
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Publication of EP0376422A2 publication Critical patent/EP0376422A2/en
Publication of EP0376422A3 publication Critical patent/EP0376422A3/en
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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
    • E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/113—Locating fluid leaks, intrusions or movements using electrical indications; using light radiations

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the cleaning of well shafts has mostly been carried out by first performing a visual inspection of the shaft and then determining, for example, the composition of the washing liquid and the duration of the cleaning process.
  • a device for performing this method is known for example from DE-PS 34 45 316.
  • This object is achieved in that the ion concentration of various ions released from the deposits in the washing liquid is measured during the cleaning process, that the concentration of the ions released from the deposits in the washing liquid is suitably reduced depending on the result of these measurements for the further course of the cleaning , and that the duration of the cleaning process is controlled in dependence on the result of these measurements in such a way that the cleaning process is ended when no appreciable increase in the measured ion concentration is detected, although the washing liquid is still capable of absorbing corresponding ions.
  • the ions to be measured are, for example, the cations iron, manganese, calcium and / or aluminum, and the anions, for example sulfate and / or chloride, and also the cations and anions of the washing liquid additives.
  • sum parameter parameters of the washing liquid containing the various dissolved deposits can also be measured and the further cleaning process can also be influenced as a function of these measurements.
  • the master parameters are essentially the pH value, the conductivity and / or the redox voltage of the washing liquid.
  • the measurement can be carried out continuously or discontinuously. By determining the respective ion concentration and in particular its change over time, it can be determined which composition the Deposits and which detergent composition is the cheapest. If, for example, the concentration of an ion type increases only very slowly, although the absorption capacity of the washing liquid for these ions is far from exhausted, this means that these ion-forming deposits are only present to a negligible extent. If, on the other hand, there is no longer an increase in the concentration of an ion type because the absorption capacity of the washing liquid has been exhausted for this purpose, then suitable measures must be taken to ensure that these ions are absorbed further in the washing liquid.
  • the washing liquid is expediently led out of the shaft upwards and then returned to the shaft. This also facilitates the removal of used and fresh washing liquid, since these measures can then also be carried out outside the shaft.
  • the fresh washing liquid can be used up by reducing the ion concentration of the dissolved deposits in the discharged Washer fluid can be obtained.
  • the composition of the fresh washing liquid supplied is preferably determined by the result of the measurement, so that the absorption capacity is increased specifically for ions which are still present to a considerable extent in the deposits.
  • the deposits to be removed must not only be those that gradually accumulate during the operation of the well, but can also be so-called drilling fluid additives that were used in the manufacture of the well and must then be removed, since they impair the performance of the well.
  • the detergent liquid can also contain additives suitable for disinfection.
  • the measurements carried out then also serve in each case to control the disinfection and, if appropriate, by additional measurements to detect biological activities.
  • the total amount of the deposited deposits, divided into the individual types of ions measured can also be determined. This enables conclusions to be drawn about the condition of the well, for example at what intervals cleaning is carried out or whether the well should be replaced.
  • the concentration of the ions can be replaced by the continuous pumping out of the sample by continuous removal of ions from the washing liquid.
  • the figure thus represents only an example to explain the claimed method and in no way limits the application of the method by the representation of the figure.
  • the necessary measurements can be carried out inside or outside the well.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geophysics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

A method of cleaning well shafts is described in which a washing liquid, consisting of the ground water with suitable admixtures, is forced out of the well filter pipe into gravel layers adjoining the filter-pipe wall and is drawn back again. Here, deposits, which reduce the capacity and are to be removed, can be dissolved with and in the admixtures so that they are dissolved by the washing liquid and are absorbed in the latter in the dissolved state. During the cleaning operation, the ion concentration of various ions, dissolved from the deposits, in the washing liquid is measured and the further cleaning operation is controlled as a function of the result of these measurements. In addition, summation-parameter command variables of the various dissolved deposits and of the washing liquid can also be measured, the further cleaning operation also being controlled as a function of these measurements.

Description

Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruchs 1.The invention relates to a method according to the preamble of claim 1.

Bisher ist man bei der Reinigung von Brunnenschächten zumeist so vorgegangen, daß zunächst eine visuelle Inspektion des Schachtes durchgeführt wurde und hiernach beispielsweise die Zusammensetzung der Waschflüssigkeit und die Dauer des Reinigungsvorganges bestimmt wurden. Eine Vorrichtung zur Durchführung dieses Verfahrens ist beispielsweise aus der DE-PS 34 45 316 bekannt.So far, the cleaning of well shafts has mostly been carried out by first performing a visual inspection of the shaft and then determining, for example, the composition of the washing liquid and the duration of the cleaning process. A device for performing this method is known for example from DE-PS 34 45 316.

Dieses Verfahren ist naturgemäß sehr ungenau, da die visuelle Untersuchung nur einen ungenügenden Aufschluß über den Umfang und die Art der Verunreinigung gibt. Daher tritt entweder der Fall ein, daß die Reinigung nicht ausreichend ist, oder der Fall, daß zuviel Waschmittel zugeführt wird.This method is naturally very imprecise, since the visual examination only provides insufficient information about the extent and type of the contamination. Therefore, there is either the case that the cleaning is insufficient or the case that too much detergent is added.

Aus der US-A-3 547 194 ist ein Verfahren Zum Reinigen von Brunnenschächten bekannt, bei dem eine eine Mischung aus Salzsäure und Glykolsäure enthaltende Waschflüssigkeit aus dem Brunnenfilterrohr in die an die Filterrohrwandung angrenzenden Kiesschichten gedrückt und wieder zurückgesandt wird. Die zu beseitigenden leistungsmindernden Ablagerungen werden in der Waschflüssigkeit gelöst und von dieser aufgenommen. Es findet jedoch auch hier keine Überwachung während des Reinigungsvorgangs statt.From US-A-3 547 194 a method for cleaning wells is known, in which a washing liquid containing a mixture of hydrochloric acid and glycolic acid is pressed out of the well filter tube into the gravel layers adjacent to the filter tube wall and sent back again. The performance-reducing deposits to be removed are dissolved in and taken up by the washing liquid. However, there is no monitoring during the cleaning process here either.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Verfahrenssteuerung zur Reinigung von Brunnenschächten anzugeben, die gute Reinigungsergebnisse bewirkt und kostengünstig arbeitet.It is therefore an object of the present invention to provide a process control for cleaning well shafts, which brings about good cleaning results and works inexpensively.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß während des Reinigungsvorganges die Ionenkonzentration verschiedener aus den Ablagerungen gelöster Ionen in der Waschflüssigkeit gemessen wird, daß die Konzentration der aus den Ablagerungen gelösten Ionen in der Waschflüssigkeit in Abhängigkeit vom Ergebnis dieser Messungen für den weiteren Reinigungsverlauf geeignet verringert wird, und daß die Dauer des Reinigungsvorganges in Abhängigkeit vom Ergebnis dieser Messungen gesteuert wird derart, daß der Reinigungsvorgang beendet wird, wenn kein nennenswerter Anstieg der gemessenen Ionenkonzentration mehr festgestellt wird, obwohl die Waschflüssigkeit zur Aufnahme entsprechender Ionen noch fähig ist.This object is achieved in that the ion concentration of various ions released from the deposits in the washing liquid is measured during the cleaning process, that the concentration of the ions released from the deposits in the washing liquid is suitably reduced depending on the result of these measurements for the further course of the cleaning , and that the duration of the cleaning process is controlled in dependence on the result of these measurements in such a way that the cleaning process is ended when no appreciable increase in the measured ion concentration is detected, although the washing liquid is still capable of absorbing corresponding ions.

Die zu messenden Ionen sind zum Beispiel die Kationen Eisen, Mangan, Calcium und/oder Aluminium, sowie die Anionen, z.B. Sulfat und/oder Chlorid, und außerdem die Kationen und Anionen der Waschflüssigkeit-Zusätze.The ions to be measured are, for example, the cations iron, manganese, calcium and / or aluminum, and the anions, for example sulfate and / or chloride, and also the cations and anions of the washing liquid additives.

Zusätzlich können auch Summenparameter-Leitgrößen der die verschiedenen gelösten Ablagerungen enthaltenden Waschflüssigkeit gemessen und auch in Abhängigkeit von diesen Messungen der weiteren Reinigungsvorgang beeinflußt werden. Die Summenparameter-Leitgrößen sind im wesentlichen der pH-Wert, die Leitfähigkeit und/oder die Redoxspannung der Waschflüssigkeit. Die Messung kann kontinuierlich oder diskontinuierlich durchgeführt werden. Durch die Ermittlung der jeweiligen Ionenkonzentration und insbesondere ihrer zeitlichen Veränderung kann festgestellt werden, welche Zusammensetzung die Ablagerungen aufweisen und welche Waschmittelzusammensetzung jeweils am günstigsten ist. Nimmt beispielsweise die Konzentration einer Ionenart nur noch sehr langsam zu, obwohl die Aufnahmefähigkeit der Waschflüssigkeit für diese Ionen noch längst nicht erschöpft ist, dann bedeutet dies, daß diese Ionen bildenden Ablagerungen nur noch in vernachlässigbarem Umfang vorhanden sind. Ist dagegen kein Anstieg der Konzentration einer Ionenart mehr zu verzeichnen, weil die Aufnahmefähigkeit der Waschflüssigkeit hierfür erschöpft ist, dann müssen geeignete Maßnahmen getroffen werden, um eine weitere Aufnahme dieser Ionen in der Waschflüssigkeit sicherzustellen.In addition, sum parameter parameters of the washing liquid containing the various dissolved deposits can also be measured and the further cleaning process can also be influenced as a function of these measurements. The master parameters are essentially the pH value, the conductivity and / or the redox voltage of the washing liquid. The measurement can be carried out continuously or discontinuously. By determining the respective ion concentration and in particular its change over time, it can be determined which composition the Deposits and which detergent composition is the cheapest. If, for example, the concentration of an ion type increases only very slowly, although the absorption capacity of the washing liquid for these ions is far from exhausted, this means that these ion-forming deposits are only present to a negligible extent. If, on the other hand, there is no longer an increase in the concentration of an ion type because the absorption capacity of the washing liquid has been exhausted for this purpose, then suitable measures must be taken to ensure that these ions are absorbed further in the washing liquid.

Demgemäß ist es vorteilhaft, die Konzentration der Ionen gelöster Ablagerungen in der Waschflüssigkeit zu verringern.Accordingly, it is advantageous to reduce the concentration of ions of dissolved deposits in the washing liquid.

Wird kein nennenswerter Anstieg der gemessenen Ionenkonzentration mehr festgestellt, obwohl die Waschflüssigkeit zur Aufnahme entsprechender Ionen noch fähig ist, dann sind die Ablagerungen im wesentlichen beseitigt und der Reinigungsvorgang kann beendet werden.If there is no longer any appreciable increase in the measured ion concentration, even though the washing liquid is still capable of absorbing corresponding ions, the deposits are essentially removed and the cleaning process can be ended.

Zur Durchführung der Messung wird die Waschflüssigkeit zweckmäßig nach oben aus dem Schacht heraus- und anschließend wieder in den Schacht zurückgeführt. Dies erleichtert auch eine Abführung verbrauchter und Zuführung frischer Waschflüssigkeit, da diese Maßnahmen dann ebenfalls außerhalb des Schachtes vorgenommen werden können. Die frische Waschflüssigkeit kann durch Herabsetzung der Ionenkonzentration der gelösten Ablagerungen in der abgeführten verbrauchten Waschflüssigkeit gewonnen werden. Die Zusammensetzung der zugeführten frischen Waschflüssigkeit wird vorzugsweise durch das Ergebnis der Messung bestimmt, damit gezielt die Aufnahmefähigkeit gerade für solche Ionen erhöht wird, die noch in erheblichem Maße in den Ablagerungen vorhanden sind.To carry out the measurement, the washing liquid is expediently led out of the shaft upwards and then returned to the shaft. This also facilitates the removal of used and fresh washing liquid, since these measures can then also be carried out outside the shaft. The fresh washing liquid can be used up by reducing the ion concentration of the dissolved deposits in the discharged Washer fluid can be obtained. The composition of the fresh washing liquid supplied is preferably determined by the result of the measurement, so that the absorption capacity is increased specifically for ions which are still present to a considerable extent in the deposits.

Die zu lösenden Ablagerungen müssen nicht nur solche sein, die sich während des Brunnenbetriebes allmählich ansammeln, sondern es kann sich hierbei auch um sogenannte Bohrspülzusätze handeln, die bei der Brunnenherstellung eingesetzt wurden und anschließend entfernt werden müssen, da sie das Leistungsvermögen des Brunnens beeinträchtigen.The deposits to be removed must not only be those that gradually accumulate during the operation of the well, but can also be so-called drilling fluid additives that were used in the manufacture of the well and must then be removed, since they impair the performance of the well.

Die Waschmittelflüssigkeit kann auch zur Desinfektion geeignete Zusätze enthalten. Hierbei dienen die durchgeführten Messungen dann jeweils auch zur Steuerung der Desinfektion sowie gegebenenfalls durch zusätzliche Messungen zum Nachweis von biologischen Aktivitäten.The detergent liquid can also contain additives suitable for disinfection. The measurements carried out then also serve in each case to control the disinfection and, if appropriate, by additional measurements to detect biological activities.

Durch Messung der Menge der verbrauchten Waschflüssigkeit und der in dieser enthaltenen Ionenkonzentrationen kann auch die Gesamtmenge der herausgelösten Ablagerungen, unterteilt in die einzelnen gemessenen Ionenarten, bestimmt werden. Dies ermöglicht Rückschlüsse auf den Zustand des jeweiligen Brunnens, beispielsweise in welchen Zeitabständen eine Reinigung vorgenommen oder ob der Brunnen erneuert werden sollte.By measuring the amount of washing liquid used and the ion concentrations contained in it, the total amount of the deposited deposits, divided into the individual types of ions measured, can also be determined. This enables conclusions to be drawn about the condition of the well, for example at what intervals cleaning is carried out or whether the well should be replaced.

Die Erfindung wird im folgenden anhand eines in der Figur dargestellten Beispiels näher erläutert.The invention is explained below with reference to an example shown in the figure.

Diese zeigt beispielhaft die schematische Darstellung der Konzentrationsverläufe für eine beliebig gewählte Ionenart der zu lösenden Ablagerungen aus dem Brunnen in Abhängigkeit von Lösungs-und Abpumpvorgängen für ein beispielsweise abschnittsweise arbeitendes Brunnenreinigungsverfahren. Parameter sind: Regenerierung mit Säuren, Einhaltung eines konstanten pH-Wertes.This shows, by way of example, the schematic representation of the concentration profiles for an arbitrarily selected type of ion of the deposits to be released from the well, depending on the solution and pumping-out processes for a well-cleaning method that works in sections, for example. Parameters are: regeneration with acids, maintaining a constant pH value.

Dabei sind im einzelnen:

  • 1. spezifische Ionen-Konzentration im Reinigungsgerät-Arbeitsabschnitt, z.B. Eisen-Gesamt
  • 2. Zeit
  • 3. maximale Aufnahme-Kapazität der Reinigungsflüssigkeit für die jeweils gemessene Ionen-Art
  • 4. gesteuerte Dosierung -Regeneriermittel
  • 5. gesteuerte Nach-Dosierung-Regeneriermittel
  • 6. Lösungsvorgang
  • 7. Zwischen-Abpumpen
  • 8. Abpumpen
  • 9. entfernte Menge 1. Durchgang
  • 10. entfernte Menge 2. Druchgang
  • 11. entfernte Menge vorletzter Durchgang
  • 12. entfernte Menge letzter Durchgang
  • 13. alle Ablagerungen gelöst
  • 14. Umsetzen des Reinigungsgerätes auf den nächsten Arbeitsabschnitt
  • 15. im zeitlichen Verlauf zur vollständigen Lösung der tatsächlich vorhandenen Ablagerungen eventuell notwendige Reinigungsdurchgänge am Arbeitsabschnitt.
The following are:
  • 1. specific ion concentration in the cleaning device working section, for example total iron
  • 2nd time
  • 3. Maximum absorption capacity of the cleaning liquid for the measured ion type
  • 4. Controlled dosing - regenerating agent
  • 5. Controlled post-dosing regenerant
  • 6. Solution process
  • 7. Intermediate pumping
  • 8. Drain
  • 9. Quantity removed 1st round
  • 10. Quantity removed 2nd pass
  • 11. removed quantity penultimate round
  • 12. Quantity removed last run
  • 13. All deposits removed
  • 14. Transfer of the cleaning device to the next working section
  • 15. In the course of time for the complete removal of the actually existing deposits, possibly necessary cleaning passes on the working section.

Selbstverständlich kann die Konzentration der Ionen durch kontinuierlichen Ionen-Entzug aus der Waschflüssigkeit das beispielhafte Zwischen-Abpumpen ersetzen. Die Figur stellt somit auch nur ein Beispiel zur Erläuterung des beanspruchten Verfahrens dar und schränkt die Anwendung des Verfahrens durch die Darstellung der Figur in keiner Weise ein. Die notwendigen Messungen können je nach Erfordernissen und Anlagengestaltung im oder außerhalb des Brunnens vorgenommen werden.Of course, the concentration of the ions can be replaced by the continuous pumping out of the sample by continuous removal of ions from the washing liquid. The figure thus represents only an example to explain the claimed method and in no way limits the application of the method by the representation of the figure. Depending on the requirements and the design of the system, the necessary measurements can be carried out inside or outside the well.

Claims (9)

  1. Process of cleaning wellshafts, in which a washing liquid consisting of groundwater with suitable additives is forced from the wellshaft filtration pipe into layers of gravel adjacent to the filtration-pipe wall and sucked back, and that output reducing deposits which have to be removed are separated with and in the additives and are separated by the washing liquid and absorbed by the latter in said separated state, characterized in that during the cleaning process the ion concentration of different ions which have been separated from the deposits in the washing liquid is measured, that the concentration of ions separated from the deposits in the washing liquid is suitably reduced in dependence of the result of such measuring operations for further cleaning, and that the duration of a cleaning process is controlled in dependence of the result of these measuring processes so that the cleaning process is terminated when no significant increase in a measured ion concentration is detected, although the washing liquid is still capable of accommodating respective ions.
  2. Process according to claim 1, characterized in that additionally sum parameter guide values of the various separated deposits and of the washing liquid are measured, and that subsequent cleaning is controlled in dependence of these measuring processes.
  3. Process according to one of claims 1 or 2, characterized in that the washing liquid is ducted upwards and out of the shaft and thereafter back into the shaft for the purpose of measuring, or measuring is carried out directly in a section to be cleaned.
  4. Process according to one of claims 1 to 3, characterized in that a portion of used washing liquid is replaced by fresh washing liquid in order to reduce the concentration of ions of separated deposits.
  5. Process according to claim 4, characterized in that the ion concentration of separated deposits in the used washing liquid to be replaced is reduced, and this washing liquid is then reintroduced into the cleaning process.
  6. Process according to claim 4, characterized in that the composition of the fresh washing liquid is controlled by the measuring result.
  7. Process according to one of claims 1 to 6, characterized in that the respective total quantity of deposits separated in the washing liquid in the course of a cleaning process is determined.
  8. Process according to one of claims 1 to 7, characterized in that the washing liquid contains suitable disinfectant additives, and that carried out measuring operations are additionally used to control disinfection by measurements which determine biological activities.
  9. Process according to one of claims 1 to 8, characterized in that the washing liquid contains suitable additives for the removal of bore-rinsing additives, and that carried out measuring operations are complemented by suitable measuring operations relative to applied additives for the purpose of removal as well as bore-rinsing additives which have to be removed, and the measuring results are also used both to control the removal and quantitative determination of the bore-rinsing additives.
EP89250124A 1988-12-30 1989-12-20 Method of cleaning well shafts Expired - Lifetime EP0376422B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3844499 1988-12-30
DE3844499A DE3844499C1 (en) 1988-12-30 1988-12-30

Publications (3)

Publication Number Publication Date
EP0376422A2 EP0376422A2 (en) 1990-07-04
EP0376422A3 EP0376422A3 (en) 1991-10-30
EP0376422B1 true EP0376422B1 (en) 1995-03-01

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ID=6370642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89250124A Expired - Lifetime EP0376422B1 (en) 1988-12-30 1989-12-20 Method of cleaning well shafts

Country Status (5)

Country Link
EP (1) EP0376422B1 (en)
AT (1) ATE119236T1 (en)
DD (1) DD292286A5 (en)
DE (2) DE3844499C1 (en)
ES (1) ES2071650T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224677A1 (en) * 2002-06-03 2003-12-18 Aquaplus Brunnensanierung H Mu Combined mechanical and chemical regeneration of a well, involves introducing a regenerate to the water via a filter pipe

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940107C2 (en) * 1989-12-05 1999-03-18 Bauer Reinhold Device for cleaning the filter gravel fill in water wells
DE4133531C2 (en) * 1991-10-10 1994-09-15 Aquaplus Brunnensanierung Kaet Combined mechanical / chemical well regeneration method and device for carrying out the same
SE9201843L (en) * 1992-06-16 1993-12-17 In Terra Aqua Fresh water storage facility
DE102005027405A1 (en) * 2005-06-13 2006-12-14 Aqua Brunnen Service Regenerierungstechnik Gmbh Process and assembly to clean sub-surface pipes by pumping cleaning agents in solution through radial discharge outlets
DE102008055623B4 (en) * 2008-11-03 2012-04-26 Peter Nillert Apparatus and method for activating or cleaning wells
DE102009018383B4 (en) 2009-04-26 2011-04-07 Nillert, Peter, Dr. Ing. Device for activating or cleaning filter tube wells
DE102014007812A1 (en) 2014-06-02 2015-12-03 Teftorec Gmbh Device for activating or cleaning wells
DE102015002476A1 (en) 2015-02-26 2016-09-01 Teftorec Gmbh Apparatus and method for activating or cleaning wells

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Publication number Priority date Publication date Assignee Title
US3547194A (en) * 1968-12-06 1970-12-15 Maher D L Co Method of cleaning gravel packed,gravel developed,and drilled igneous wells
DE3025275A1 (en) * 1980-07-03 1982-01-28 Siemens AG, 1000 Berlin und 8000 München METHOD FOR MONITORING PURE WATER FOR FOREIGN DION CONTENT USING A CONDUCTIVITY MEASUREMENT
US4392529A (en) * 1981-11-03 1983-07-12 Burwell Maurel R Method of cleaning a well and apparatus thereof
EP0103779A3 (en) * 1982-09-20 1985-01-09 John E. Oliver Removing contaminates from a well fluid and well system
DE3303802A1 (en) * 1983-02-04 1984-08-16 Deutsche Nalco Chemie GmbH, 6000 Frankfurt Process for cleaning and conditioning water storage and water distribution systems and a cleaner for water wells
DE3445316A1 (en) * 1984-12-07 1986-06-19 Charlottenburger Motoren- und Gerätebau KG H.W. Paul, 1000 Berlin Apparatus for cleaning well shafts
DE3504752A1 (en) * 1985-02-08 1986-08-14 Charlottenburger Motoren- und Gerätebau KG H.W. Paul, 1000 Berlin Process for cleaning well shafts and bore wells
GB2202047A (en) * 1987-03-09 1988-09-14 Forex Neptune Sa Monitoring drilling mud

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224677A1 (en) * 2002-06-03 2003-12-18 Aquaplus Brunnensanierung H Mu Combined mechanical and chemical regeneration of a well, involves introducing a regenerate to the water via a filter pipe
DE10224677B4 (en) * 2002-06-03 2005-06-16 Aquaplus - Brunnensanierung H. Munding Gmbh & Co. Kg Method for combined mechanical / chemical well regeneration

Also Published As

Publication number Publication date
DE3844499C1 (en) 1990-07-05
DD292286A5 (en) 1991-07-25
ATE119236T1 (en) 1995-03-15
ES2071650T3 (en) 1995-07-01
DE58909063D1 (en) 1995-04-06
EP0376422A2 (en) 1990-07-04
EP0376422A3 (en) 1991-10-30

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