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US20060157237A1 - Well and method for regenerating a well - Google Patents

Well and method for regenerating a well Download PDF

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Publication number
US20060157237A1
US20060157237A1 US10/564,514 US56451403A US2006157237A1 US 20060157237 A1 US20060157237 A1 US 20060157237A1 US 56451403 A US56451403 A US 56451403A US 2006157237 A1 US2006157237 A1 US 2006157237A1
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US
United States
Prior art keywords
standpipe
well
filter pipe
water
pipe area
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.)
Abandoned
Application number
US10/564,514
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English (en)
Inventor
Magdalena Rotthauser
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.)
EXPLORATIN DRILLING INTERNATIONAL GmbH
MAGDALENE ROTTHUSER
Original Assignee
EXPLORATIN 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 EXPLORATIN DRILLING INTERNATIONAL GmbH filed Critical EXPLORATIN DRILLING INTERNATIONAL GmbH
Assigned to EXPLORATIN DRILLING INTERNATIONAL GMBH reassignment EXPLORATIN DRILLING INTERNATIONAL GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROTHAUSER, MAGDALENA
Publication of US20060157237A1 publication Critical patent/US20060157237A1/en
Abandoned legal-status Critical Current

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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 extracting, observing and/or lowering of ground water, comprising a standpipe having at least one filter pipe area and comprising at least one pump arranged in the standpipe.
  • the invention further relates to a method for regenerating a well provided for extracting, observing and/or lowering of ground water.
  • An important disadvantage of the known wells is that these frequently have only a comparatively short lifetime. This occurs because after a certain operating time, a filter cake is formed on the filter pipe area. At the same time, the fine pores and capillaries in the filter gravel are clogged by particles in the ground water. This has the result that at constant pump power the quantity of water obtained per unit time decreases.
  • an attempt is made to carry out backflushing. This is not only expensive in terms of apparatus. Backflushing also has the result that particles are dissolved out from the filter cake, are pressed into the rock mass and thus impede the water inflow during the subsequent pumping.
  • Another disadvantage of the known wells is that especially in the case of wells located in areas where agricultural usage is also taking place, elevated nitrate levels occur in the conveyed groundwater.
  • other contamination such as salt water for example can adversely affect the ground water. This is obtained because when ground water is pumped from the relevant water-bearing layer, so-called foreign water, that is water from other layers, is also pumped.
  • the previously derived object is solved according to the invention in a well of the type specified initially by allocating to the filter pipe area a spraying device for spraying the filter pipe area and/or the well area adjacent to the filter pipe area and connecting the spraying device to at least one pressure line for supplying the spraying unit with a medium to be sprayed.
  • the invention offers a number of in some cases substantial advantages. Firstly, the invention makes it possible to increase the lifetime of a well quite considerably.
  • the spraying device makes it possible to loosen any filter cake located on the filter pipe area and loosen the gravel layer surrounding the filter pipe area as adjacent well area to such an extent that particles blocking the pores and capillaries in the filter gravel layer are removed.
  • the medium can be supplied quite specifically on to the areas to be regenerated so pressing 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 therefore regeneration of the well can also take place during pumping. As a result of the spraying, loosened particles and other contamination are immediately removed via the pump without clogging the surrounding rock mass. In addition, it is possible in the invention to supply a wide range of media to the spraying device through the pressure line which ends above ground.
  • the supplied medium can be used both for regeneration, that is for cleaning the filter pipe area and the filter gravel bed and also for water treatment if gases such as ozone and/or liquid water treatment agents, in some cases with solid particles such as water with charcoal dust, are supplied to the spraying device by means of the pressure line.
  • the spraying unit has at least one annular channel affixed to the filter pipe region.
  • This annular channel is provided with a plurality of nozzles distributed over its length via which the medium is supplied.
  • the spacing of the individual nozzles is preferably selected so that sufficient removal of the filter cake on the filter pipe region and adequate loosening of the filter gravel layer are easily achieved.
  • two or more annular channels can be provided which then have a sufficient spacing from one another in the axial direction to ensure sufficient regeneration of the entire lower well area.
  • annular spraying means instead of an annular spraying means, a plurality of individual spraying points distributed over the circumference of the filter pipe area can naturally also be provided.
  • Good regeneration values i.e. dislodging the filter cake on the filter pipe area and loosening the adjacent filter gravel layer are preferably achieved by aligning some of the nozzles parallel to the pipe axis, preferably directly adjacent to the wall of the filter pipe area or at an acute angle thereto. A horizontal alignment of the nozzles is certainly possible. However, this can have the result that particles are pressed into the adjacent rock mass which can impair the ground water inflow.
  • the nozzles are adjustable. An adjustment can be made for example by the nozzle being pivoted from a base position when pressure is applied to the spraying device depending on the pressure. At the same time, it is fundamentally also possible for the nozzles to rotate about an axis located on the ring circumferential axis when pressure is applied.
  • the nozzles can in principle be constructed as simple openings in the annular channel. However, in order to avoid clogging of the individual nozzles by particles and therefore encrustation or sintering, the nozzles have at least one valve and in particular a spring-loaded check valve. The individual nozzle are hereby closed in the non-pressure-loaded state. The check valves only open at a predetermined minimum pressure obtained from the pressure loading of the spraying device in order to close again immediately after the end of the pressure loading. Finally, this ensure permanent and disturbance-free operation of the spraying device.
  • the spraying device can have one or a plurality of annular channels depending on the length of the filter pipe area. If only one annular channel is required, it is possible for the spraying device to have a base plate connected to the annular channel which terminates the filter pipe area at the bottom. The spraying device or the annular channel thus form the lower end of the pipeline. In this embodiment the nozzles of the annular channel should not be directed downwards to avoid flushing out the soil at this point.
  • both the annular channel and also the pressure line supplying the medium should be made of plastic or stainless steel and should preferably be fixed to the standpipe on the outside. This outside fixing ultimately ensures that during withdrawal of the pump no contact can take place between the pump and the pressure line which could damage the pump and the pressure line.
  • an outlet is provided at the wellhead which communicates with the pump line of the pump.
  • This outlet has a valve constructed such that the water pumped by the pump is not removed via the usual water drain pipe but exclusively via the outlet.
  • the outlet should have an associated drive by which means the outlet is automatically opening following or during spraying and the pumped water is removed without it being necessary to dismantle the wellhead, remove the pump or other measures.
  • a supply device for supplying a liquid and/or gaseous medium to the spraying device.
  • This supply device is connected to the pressure line at its above-ground end.
  • the supply device is preferably constructed so that the medium is supply thereby to the spraying device either at constant pressure or by means of pressure surges.
  • the supply device has a pressure limiter so that certain maximum pressures cannot be exceeded.
  • the supply device has a time switch. By this means spraying can be carried out over a precisely predetermined time interval without an operator needing to monitor this. It is also favourable in this connection if the supply device is coupled to the outlet or its control so that depending on the spraying, water is automatically removed from the outlet for a predetermined time interval.
  • the filter pipe area or the filter gravel layer cannot be regenerated sufficiently.
  • the standpipe is located in an outer standpipe, that the outer standpipe is fixedly connected to the surrounding rock mass and that the standpipe is constructed as withdrawable from the outer standpipe.
  • the outer standpipe is fixedly connected to the rock mass in an inherently known fashion, the inner standpipe on which the lower filter pipe area is located, can easily be withdrawn for above-ground regeneration which is not possible with conventional wells.
  • the lower filter pipe area can be cleaned above ground after withdrawing the inner standpipe.
  • the collapsed filter gravel is flushed out of the borehole itself which is held further open by means of the outer standpipe.
  • the inner standpipe with the cleaned or a new filter pipe area can then be inserted into the outer standpipe again.
  • the required quantity of filter gravel is then inserted into the annular space between the outer and the inner standpipe.
  • the well can then be further operated again.
  • the spraying device described initially specifically in connection with the double-pipe design of the well offers particular advantages since the possible withdrawal of the inner pipe only needs to be made very rarely.
  • the spraying device is then fixed to the inner pipe, namely on the filter pipe area in the manner described previously.
  • the filter pipe area of the inner standpipe line projects downwards over the lower end of the outer standpipe.
  • the outer standpipe extends as far as the respective water-bearing layer and thus stabilised the borehole from above ground as far as the water-bearing layer.
  • the inner pipeline with the filter pipe area penetrates into the water-bearing layer so that conveyance can be carried out by this means.
  • spacers are provided. These can be affixed to the inner and/or the outer standpipe.
  • the pressure line should preferably be accommodated between two spacers which have a greater extension in the radial direction than the pressure pipe so that in this case the spacers have an additional protection function for the pressure line. It is understood that a plurality of corresponding spacers are provided distributed over the pipeline in the axial direction.
  • the invention provides that the outer standpipe is sealed from the surrounding rock mass by means of a hydraulic mineral binder so that ground water is only obtained from the water-bearing layer in which the filter pipe area is located and an inflow of water from other layers is avoided.
  • the invention differs from the prior art in that the hydraulic binders used in the prior art merely serve to fix the outer standpipe in the borehole.
  • the hydraulic binders used in the prior art merely serve to fix the outer standpipe in the borehole.
  • there is no sufficient sealing between the rock mass and the outer standpipe which results in an intake of contaminated external water via the inadequately sealed annular space between the outer standpipe and the adjacent rock mass when the pump is operating. Since in the invention a seal is made between the outer standpipe and the rock mass, the original state of the rock mass is almost restored as it were.
  • the water-bearing layer from which the water is obtained is sealed from other layers in the area of the annular space.
  • a lowering funnel around the well, extending into other layers, as is usual in the prior art, is avoided in the invention.
  • the fresh water obtained thus retains its original quality.
  • the present invention can be used not only for extracting ground water from one water level but also in several water levels.
  • the outer standpipe or the standpipe line is divided and exposes the respective water-bearing layers.
  • filter pipe areas are provided via which the ground water is obtained. Otherwise, the outer standpipe line is sealed in the manner described previously.
  • the binder has a highly and permanently plastic behaviour when set, that is, it is extremely viscous. This ensures that especially in areas where earth movements occur, the well or the binder layer is not destroyed which can in turn result in an intake of contaminated external water.
  • a water/solid mixture based on marl has proved to be particularly suitable as a sealing binder which also exhibits highly and permanently plastic behaviour.
  • the fluidity when not yet set and also the plastic behaviour when set are particularly improved by adding a fraction of up to 30%, preferably of around 20% bentonite to the marl.
  • a fraction of up to 30% preferably of around 20% bentonite to the marl.
  • bentonite it is understood that each individual value in the specified interval of 0% to 30% is possible.
  • FIG. 1 is a schematic cross-sectional view of a well according to the invention
  • FIG. 2 is an enlarged view of the lower well area
  • FIG. 3 is a view corresponding to FIG. 1 of a further embodiment where ground water is obtained from two water levels.
  • the individual figures each show a well 1 which is presently used to extract ground water.
  • wells of the type shown can also be used for observing or for lowering ground water.
  • the well 1 has a standpipe 2 which is hereinafter designated as inner standpipe.
  • Adjacent to the inner stand pipe 2 is a filter pipe area 3 via which the ground water is obtained.
  • the filter pipe area 3 has perforations whose opening width is smaller than the filter gravel of the filter gravel casing 5 arranged around the filter pipe area 3 .
  • Located inside the inner standpipe 2 is a pump 6 whose pump line 7 leads to a well head 8 .
  • the inner standpipe comprises a pipeline comprising a plurality of individual pipe lengths placed adjacent to one another.
  • the filter pipe area 3 comprises an inherently separate pipe length which is connected to the pipeline. It is naturally understood that in the case of short standpipes it is also possible that the pipeline merely consists of a single piece where the filter pipe area 3 can be constructed in one piece with the standpipe.
  • standpipe is used regardless of whether this standpipe comprises one or a plurality of pipe lengths.
  • a spraying device 9 is associated with the filter pipe area 3 so that the filter pipe area 3 and/or the filter gravel casing 5 can be sprayed by means of said device in order to regenerate this area.
  • the spraying device 9 is connected to a pressure line 10 for supplying the spraying device 9 with a medium to be sprayed.
  • the spraying device 9 comprises an annular channel 11 having a plurality of nozzles 12 affixed to the filter pipe area 3 .
  • a plurality of annular channels can be provided, these being connected to the pressure line 10 .
  • the nozzles 11 are aligned parallel to the pipe axis adjacent to the wall of the filter pipe area 3 .
  • the outwardly expanding nozzle jet from the nozzle 12 thus acts on the wall of the filter pipe area 3 and loosens the filter gravel of the filter gravel casing 5 which results in regeneration.
  • the nozzles 12 each have a spring-loaded check valve 13 which is only indicated schematically. This avoids any penetration of filter gravel or other particles and clogging of the nozzle 11 .
  • the spraying device When only one annular channel 11 is used, the spraying device has a base plate 13 which is placed on the end of the filter pipe area 3 .
  • the spraying device 9 thus forms the lower end of the inner standpipe line.
  • the lower base plate 13 is omitted.
  • the spraying device 9 itself together with the pressure line 10 consists of stainless steel to ensure permanent operation.
  • the pressure line 10 is fixed 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 at the well head 8 .
  • the outlet 14 comprises a drain pipe via which the ground water can be led off. If no ground water is led off via the outlet, which is generally the case, the ground water is supplied for its further use via the ground water pipe 15 .
  • the pump line 7 , the outlet 14 and the ground water pipe 15 are interconnected by means of a three-way valve 16 .
  • the three-way valve 16 can be used to lead off the ground water obtained before, during or after a spraying without it being necessary to dismantle the well head 8 , remove the pump 6 or interrupt the ground water pipe 15 .
  • the pressure line 10 is provided with an above-ground supply device 17 for supplying the medium to the spraying device 9 .
  • Gases or liquids which can also contain solid can be supplied as medium.
  • ozone for example for killing micro-organisms or other water treatment means for influencing the water quality can be supplied via the supply device 17 .
  • the spraying device 9 can thus fulfil a double function, namely on the one hand it can contribute to cleaning or regenerating the filter pipe area 3 and the filter gravel casing 5 and on the other hand it can contribute to influencing the quality of the drinking water.
  • the supply device 17 itself can be constructed to supply the medium at constant pressure. It is also possible to produce pressure surges via the supply device 17 at regular or irregular intervals.
  • the supply device 17 has a corresponding pump 18 .
  • a pressure limiter 19 is provided in the present case to avoid unintentional overpressures.
  • the supply device 17 further has a time clock 20 in order to carry out the spraying and therefore the regeneration only over a predetermined time interval, making automatic operation possible.
  • both the supply device 17 and also the outlet 14 or the three-way valve 16 are coupled to a controller 21 so that ground water can be led off automatically from the outlet 14 for a predetermined time interval depending on the spraying.
  • valve 16 in connection with the automatic operation the valve 16 has a motor drive which is not shown. It is hereby possible to open the valve 16 for a predetermined time interval to lead off conveyed ground water via the outlet 14 and specifically at the beginning of spraying or at a predetermined time after the beginning of spraying. The duration of the time interval for leading off water via the outlet 14 is determined from empirical values. Alternatively it can be provided that a corresponding monitoring sensor is associated with the controller 21 which monitors the water quality. As soon as the water quality is sufficient, the valve 16 switches over again and the water is supplied to its intended usage via the ground water pipe 15 .
  • valve 16 can be a manually actuated valve.
  • the controller 21 is not necessary.
  • the inner standpipe 2 is arranged in an outer standpipe 22 .
  • the outer standpipe 22 can be constructed in the same way as has been described previously in relation to the inner standpipe 2 . However, no filter pipe area 3 is provided there.
  • the outer standpipe 22 is fixedly connected to the surrounding rock mass 23 .
  • the inner standpipe 2 can be withdrawn from the outer standpipe 22 . For this purpose it is merely necessary to dismount the well head 2 and withdrawn the pump 6 .
  • the inner stand pipe 2 which otherwise has no fixed connection to the outer standpipe 22 can then be withdrawn.
  • the outer standpipe 22 ensures that the borehole is kept open.
  • the filter pipe area 3 projects over the lower end of the outer standpipe 22 so that ground water can be extracted via the filter pipe area of the inner stand pipe 2 unimpaired by the outer standpipe 22 .
  • spacers not shown are provided on its outside to ensure a substantially central arrangement of the inner standpipe 2 in the outer stand pipe 22 although this is not clear in the figures.
  • the radial extension of the spacers is greater than the outside diameter of the pressure line 10 so that an additional protective effect for the pressure line 10 is obtained via the spacers.
  • the outer standpipe 22 is sealed with the surrounding rock mass 23 by means of a hydraulic mineral binder 24 so that the ground water is only obtained from the water-bearing layers (in FIG. 1 ) or A and B (in FIG. 3 ) in which the filter pipe area 3 is located whereas an inflow of external water from other layers is avoided.
  • the binder 24 is one that exhibits highly and permanently plastic behaviour after setting.
  • a natural-based water-solid mixture having a predominant fraction of fine-grained marl and a small fraction of about 20% of fine-grained bentonite is used as hydraulic binder.
  • FIG. 3 differs from that in FIG. 1 in that the inner pipeline 2 has two filter pipe areas 3 in different levels.
  • ground water is obtained from the water-bearing layers A, B. It is understood that a plurality of filter pipe areas is also possible.
  • the well 1 shown in FIGS. 1 and 3 is regenerated by first supplying a regeneration medium, for example, water under pressure via the supply device 17 .
  • a regeneration medium for example, water under pressure
  • pressure surges are produced, acting on the filter gravel casing 5 on the one hand and on the outside of the filter pipe area 3 on the other so that blockages in the pores and capillaries of the filter gravel casing 5 and at the perforations 4 of the filter pipe area 3 are released.
  • the pump 6 remains in pumping mode so that the released particles are removed.
  • the valve 16 is set by means of the controller 21 so that the ground water contaminated as a result of the regeneration of the lower well area is removed via the outlet 14 .
  • the valve 16 is moved into its normal position whereby the outlet 14 is closed and the access to the ground water pipe 15 is opened again.
  • ground water is presently only obtained from level A but not from other levels.
  • the inner standpipe 2 is withdrawn together with the filter pipe area 3 , the spraying device 9 and the pressure line 10 .
  • the well head 8 is first dismantled and the pump 6 withdrawn.
  • the filter gravel casing 5 collapses into itself and can be flushed out.
  • the inner standpipe 3 can be re-inserted into the outer standpipe 22 together with the pressure line 10 of the spraying device 9 .
  • the required quantity of filter gravel is then inserted via the annular space provided between the inner and the outer standpipe which is held open by the spacers. After inserting the pump and closing the well by placing the well head thereon, the well 1 can be operated again.

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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)
US10/564,514 2003-07-16 2003-07-16 Well and method for regenerating a well Abandoned US20060157237A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/007714 WO2005007980A1 (de) 2003-07-16 2003-07-16 Brunnen und verfahren zur regenerierung eines brunnens

Publications (1)

Publication Number Publication Date
US20060157237A1 true US20060157237A1 (en) 2006-07-20

Family

ID=34072434

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/564,514 Abandoned US20060157237A1 (en) 2003-07-16 2003-07-16 Well and method for regenerating a well

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPI20080130A1 (it) * 2008-12-17 2010-06-18 Lodovico Scardigli Metodo di rigenerazione di un pozzo

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007033700A2 (de) * 2005-09-22 2007-03-29 Edi Gmbh Rohrbrunnen
IT1391462B1 (it) * 2008-10-14 2011-12-23 Scardigli Metodo e dispositivo di manutenzione di un pozzo e struttura di pozzo che attua tale metodo
CN103266644B (zh) * 2013-03-26 2014-06-18 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
DE102014007812A1 (de) * 2014-06-02 2015-12-03 Teftorec Gmbh Vorrichtung zum Aktivieren oder Reinigen von Brunnen
DE102015002476A1 (de) * 2015-02-26 2016-09-01 Teftorec Gmbh Vorrichtung und Verfahren zum Aktivieren oder Reinigen von Brunnen
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

Citations (12)

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US1599744A (en) * 1925-11-19 1926-09-14 Layne New York Company Inc Well cleaner and developer
US1656550A (en) * 1924-11-03 1928-01-17 White Francis Well screen
US1665569A (en) * 1923-05-31 1928-04-10 Ohio Drilling Company Well-casing shoe
US1693405A (en) * 1927-04-20 1928-11-27 Guaranteed Water Engineering C Apparatus for cleaning wells
US1762012A (en) * 1928-05-01 1930-06-03 Artesian Well & Equipment Co I Well-casing shoe
US1918756A (en) * 1932-05-25 1933-07-18 Philip S Judy Apparatus for cleaning the filter bed of a well
US2276401A (en) * 1940-03-18 1942-03-17 Layne & Bowler Inc Well cleaning apparatus
US2309697A (en) * 1940-12-26 1943-02-02 Layne Northern Company Inc Well cleaning
US3347319A (en) * 1965-03-15 1967-10-17 Fenix & Scisson Inc Large diameter casing
US3548935A (en) * 1968-10-10 1970-12-22 Acie Darrel Harkins Apparatus for development and completion of wells
US6557565B1 (en) * 2000-09-29 2003-05-06 The Regents Of The University Of California In-situ well cleaning and refurbishing device
US20040060698A1 (en) * 2002-09-27 2004-04-01 Bj Services Company Method for cleaning gravel packs

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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
DE10023454C2 (de) * 2000-05-12 2002-09-19 Pumpenboese Gmbh & Co Kg Verfahren zur Vermeidung von Inkrustationen bei Brunnen zur Wasserförderung sowie Vorrichtung zur Durchführung des Verfahrens

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1665569A (en) * 1923-05-31 1928-04-10 Ohio Drilling Company Well-casing shoe
US1656550A (en) * 1924-11-03 1928-01-17 White Francis Well screen
US1599744A (en) * 1925-11-19 1926-09-14 Layne New York Company Inc Well cleaner and developer
US1693405A (en) * 1927-04-20 1928-11-27 Guaranteed Water Engineering C Apparatus for cleaning wells
US1762012A (en) * 1928-05-01 1930-06-03 Artesian Well & Equipment Co I Well-casing shoe
US1918756A (en) * 1932-05-25 1933-07-18 Philip S Judy Apparatus for cleaning the filter bed of a well
US2276401A (en) * 1940-03-18 1942-03-17 Layne & Bowler Inc Well cleaning apparatus
US2309697A (en) * 1940-12-26 1943-02-02 Layne Northern Company Inc Well cleaning
US3347319A (en) * 1965-03-15 1967-10-17 Fenix & Scisson Inc Large diameter casing
US3548935A (en) * 1968-10-10 1970-12-22 Acie Darrel Harkins Apparatus for development and completion of wells
US6557565B1 (en) * 2000-09-29 2003-05-06 The Regents Of The University Of California In-situ well cleaning and refurbishing device
US20040060698A1 (en) * 2002-09-27 2004-04-01 Bj Services Company Method for cleaning gravel packs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPI20080130A1 (it) * 2008-12-17 2010-06-18 Lodovico Scardigli Metodo di rigenerazione di un pozzo
EP2226465A1 (de) * 2008-12-17 2010-09-08 Lodovico Scardigli Bohrlochregenerationsverfahren

Also Published As

Publication number Publication date
DE10394249D2 (de) 2006-06-08
AU2003257469A1 (en) 2005-02-04
WO2005007980A1 (de) 2005-01-27
EP1644590A1 (de) 2006-04-12

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