GB2192039A - Cleaning water supply systems - Google Patents
Cleaning water supply systems Download PDFInfo
- Publication number
- GB2192039A GB2192039A GB08615719A GB8615719A GB2192039A GB 2192039 A GB2192039 A GB 2192039A GB 08615719 A GB08615719 A GB 08615719A GB 8615719 A GB8615719 A GB 8615719A GB 2192039 A GB2192039 A GB 2192039A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- blasting cord
- blasting
- cord
- cleaned
- 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.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000004140 cleaning Methods 0.000 title claims description 13
- 238000005422 blasting Methods 0.000 claims abstract description 31
- 238000004880 explosion Methods 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0007—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by explosions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
-
- 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
Abstract
Horizontal or near horizontal water supply systems with a solid metal filter structure especially Ranney wells, are cleaned by introducing a blasting cord into the horizontal or near horizontal filter pipes and the filter pipe and its surrounding is cleaned by the explosion of the blasting cord placed in axially. A device for introducing the blasting cord 10 comprises connectable rod elements 1 having semicircular connecting end sections 2, one of the end sections having a radial hole 4 and the other end section a pipe 5 fitting into the hole, stop rings 6 adjacent the end sections, against one of which a sleeve 7 enclosing the two end sections is bearing whilst against the other stop ring a compression spring 8 is bearing up which presses the sleeve to the first stop ring, and fastening rings 9 attached to the rod elements for attachment of the blasting cord. <IMAGE>
Description
SPECIFICATION
Process and device for cleaning of horizontal water supply systems especially of ranney wells
The invention relates to a process for cleaning of horizontal or near horizontal water supply systems with a metal filter structure, especially of Ranney wells and a device for the realization of the process.
On such territories, where the hydro-geological basis make it possible, i.e. where a gravel accumulation with permanent and considerable water reserves can be found, the so called
Ranney wells settled there are extremely suitable for the provision of water supply demand. The Ranney wells usually have a shaft of 2 to 5 m diameter and 12 to 15 m depth from where radially 6 to 8 pieces of usually 40 to 70 m long horizontal or near horizontal slotted filter tubes made of metal extend.
In course of the settlement of Ranney wells, before their putting into production for the sake of the better permeability and higher water yield, on the other hand in systems already in operation for the sake of elimination of water yield decrease due to depositions of chemical and mechanical origin during the usage, the filter tubes must be cleaned.
According to the present established practice, the cleaning of the Ranney wells is made mainly by high pressure pumps with washing heads placed into the filter tubes. The pump with the highest pressure used for washing until now is cleaning the filter slots and the tube walls with a washing liquid injected in with a pressure of 180 atm.
The efficiency of the treatment is determined by the chemical (dissolving) and mechanical effect of the applied liquid. Since it is not advisable to expose the filter tube made of steel to corrosion effects, the application of chemical dissolvents is limited, at the same time the technical possibilities are limiting the rising of mechanical impact. This means that the efficiency of cleaning is practically not increasable in the traditional way.
The task to be solved by the invention is a process for cleaning of water supply systems of types mentioned in the introduction especially that of Ranney wells making possible more effective, quicker and cheaper cleaning compered to previous methods and at the same time wholly eliminating corrosion chemical effects contaminating the steel tubes.
The base of the invention is the recognition of the fact that the problem can be solved by a properly carried out explosion in the filter tubes during which there is first a pushing than a suckling effect, damping gradually. This way besides its mechanical effect, the power of explosion is injecting the liquid into the surrounding gravel layers as well through the slots and sucks in the small type fractions, improving by it the permeability in the zone around the filter tube and rising the water yield. This is why the method can be successfully applied at the putting into production of new Ranney wells for the increase of yields.
According to the invention the aim can be reached by introducing a blasting cord into the horizontal or near horizontal filter tubes and cleaning the filter tube and the surrounding by explosion the blasting cord placed in axially.
According to the invention it is advisable to start the cleaning with the blasting cord from the inner end of the filter tubes progressing toward the external end by 10-20 m sections.
According to one of the possible realizations of the invention the blasting cord can be brought from the pumped out shaft of the
Ranney well to the section of the filter tube to be cleaned by fixing it to a charging device extendable with a quick connection.
According to another possible realization mode the blasting cord can be introduced into the section of the filter tube to be cleaned by fixing it on a flexible leading element through an arched pipe attached to the filter tube and educted above the static water level of the well.
According to the invention it is advisable after the explosion of the blasting cord, to carry out the washing with a high pressure washing head in the known way.
A device according to the present invention suitable for the working of the process according to invention, more exactly for the introduction of the blasting cord into the section to be cleaned has rod elements extendable to each other, the connection ending sections of which are formed with half diameter in similar length, where one of the ending section has a pin fitting into the hole; moreover, there is a stop ring on each of the rod elements before the connection ending sections, against one of them a sleeve enclosing the two connection ending sections while against the other one a compression spring is beared up, pressing the sleeve to the first stop ring; in addition there are fixed fastening elements assuring the attachment of the blasting cord to the mantle of rod elements.
Another device is suitable for the working of the other mode of realization of the process according to the invention, that has a flexible long body pushable into the filter tube provided with fastening elements for the attaching of the blasting cord at given distances. The body can be made of eg. steel band or glass fibre reinforced polyesther rod.
The invention is hereinafter described in detail by way examples with reference to the enclosed drawing, in which:
Figure 1 is the perspective view in a dismounted way of a charging device according to the invention, suitable for the introduction of the blasting cord,
Figure 2 is the side view of the charging device on Fig. 1 in mounted way and
Figure 3 shows the situation of the charging device introducable into the filter tubes in a
Ranney well.
As already described above, the essence of the invention is that a cord that can be purchased in the trade is introduced into the filter tubes to be cleaned of Ranney wells, and the filter tube and its surrounding is cleaned by the explosion of the blasting cord. There are several possibilities for the introduction and the establishing of the blasting cord into the filter tubes Figs. 1 and 2 shows a device suitable for the realization of one of the possibilities.
The charging device shown on the figures consists of rod elements 1 with a length of 1 to 2 meter extendable to each other, the connection ending sections 2 and 3 of which are formed with half diameter in similar length, where ending section 2 is provided with a radial hole 4, while the ending section 3 has a pin 5 fitting into the hole 4. There is a stop ring 6 fixed on the rod elements 1 before each connecting ending section 2 and 3, against one of these stop rings 6 a sleeve 7 enclosing the connecting ending sections 2,3, while against the other one a compression spring 8 is bearing up, what is pressing the sleeve 7 to the first stop ring 6, that are assuring the stability of the connection. Fastening rings 9 are fixed on the mantle of the rod elements 1, assuring the attaching and tightening of the blasting cord 10 when introducing it into the filter tubes.
At the operational use of the device of our invention all the filter tubes of the Ranney well have to be closed except that filter tube which is to be cleaned. After the aforesaid operation the water has to be pumped out of the shaft at least to the limit when the throat of the filter tube could be reached, thereafter the charging device fixing the blasting cord has to be pushed into the filter tube from the shaft by sections. The igniter housing for the starting of the detonating device must be fixed to the charging device as well.After having introduced the blasting cord until the needed section to be cleaned with the charging device, which length is preferably 10-20 meter, the explosion must be performed from the surface with the detonating machine while the power of this explosion not contaminate either the filter-tube or the charging device, at the same time increasing by several times the efficiency of cleaning, due to the mentioned facts.
Fig. 3 shows the other possible way to introduce the blasting cord into the filter tubes.
Here it can be seen clearly, that there is arched pipe 14 connected to the ending of the horizontal or near horizontal filter tube 12 starting from the bottom part of the Ranney well shaft 11, closable with the gate valve 13, exiting above the static water level of the
Ranney well. By this solution the blasting cord 10 must be introduced into the filter tube section to be cleaned fixed to a flexible leading element 16, which elements body can be made of eg. flexible steel band or glass-fibre reinforced polyesther rod or any other material with similar characteristics. Leading element 16 is suitably provided by similar fixing rings 9 or other fixing elements, as at the charging device presented at the previous figure, suitable for the attaching and tightening of blasting cord 10 during the introduction. Explosion of the blasting cord 10 is here similarly performed from the surface with the help of a detonating machine.
The process according to the invention and the application of the devices for its working has been presented on the example of Ranney wells can be applicated in case of other simiiar structure water supply systems, eg. subsoil water drainage.
Claims (9)
1. Process for the water yield increasing and regenerating cleaning of horizontal or near horizontal water supply systems, with solid metal filter structure, especially of Ranney wells, characterized by that a blasting cord is introduced into the horizontal or near horizontal filter pipes and the filter pipe and its surrounding is cleaned by the explosion of the blasting cord placed in axially.
2. Process as claimed in claim 1, characterized by that the cleaning with the blasting cord is executed from the inner end of the filter by 10-20 meter sections towards the external part.
3. Process as claimed in claim 1 or 2, characterized by that the blasting cord is educted to the section to be cleaned of the filter pipe from the pumped out Ranney well shaft by fixing it to a charging device extendable with quick connection.
4. Process as claimed in claim 1 or 2, characterized by the blasting cord is conducted to the section to be cleaned of the filter pipes by fixing it to a flexible leading element through an arched pipe exited above the static water level of the well and attached to the filter pipe.
5. Process as claimed in any of claims 1 to 4, characterized by that after the explosion of the blasting cord, an already known washing is performed.
6. Device for the working of the process according to any of claims 1 to 3, characterized by that it is provided with rod elements extendable to each other, the connection ending sections of which are formed with half diameter in similar length, where one of the ending sections has a radial hole while the other ending section is provided by a pin fitting into the hole, besides there is a stop ring fixed on the rod elements before each con necting ending section, against one of which a sleeve enclosing the two connecting ending sections, while against the other a compression spring is bearing up, what is pressing the sleeve to the first stop ring, moreover, there are fastening rings fixed to the mantle of the rod elements assuring the attaching of the blasting cord.
7. Device for the working of the process according to claim 4 or 5, characterized by that it has a long flexible body that can be introduced into the filter tube in one part and this body is provided with fixing elements on given distance assuring the fixing of the blasting cord.
8. Device according to claim 7 characterized by that the body is made of flexible steel band.
9. Device according to claim 7 characterized by that the body is made of glass fibre reinforced polyesther rod.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863620979 DE3620979A1 (en) | 1986-06-27 | 1986-06-23 | METHOD AND DEVICE FOR CLEANING HORIZONTALLY APPLIED WATER RECOVERY SYSTEMS, ESPECIALLY HORIZONTAL FILTER FOUNTAIN |
| GB08615719A GB2192039A (en) | 1986-06-27 | 1986-06-27 | Cleaning water supply systems |
| FR8609669A FR2601056B3 (en) | 1986-06-27 | 1986-07-03 | METHOD AND DEVICE FOR CLEANING HORIZONTALLY ARRANGED WATER EXTRACTION SYSTEMS, ESPECIALLY HORIZONTAL FILTER FOUNTAINS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08615719A GB2192039A (en) | 1986-06-27 | 1986-06-27 | Cleaning water supply systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8615719D0 GB8615719D0 (en) | 1986-08-06 |
| GB2192039A true GB2192039A (en) | 1987-12-31 |
Family
ID=10600194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08615719A Withdrawn GB2192039A (en) | 1986-06-27 | 1986-06-27 | Cleaning water supply systems |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3620979A1 (en) |
| FR (1) | FR2601056B3 (en) |
| GB (1) | GB2192039A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0913664A3 (en) * | 1997-10-29 | 2000-10-18 | Berliner Wasserbetriebe Anstalt d. öffentlichen Rechts | Device for mounting a detonating cord in a horizontal filter well |
| US7959432B2 (en) * | 2005-06-01 | 2011-06-14 | Frans Steur, Senior | Method of and apparatus for cleaning fouling in heat exchangers, waste-heat boilers and combustion chambers |
| CN111014196A (en) * | 2019-12-25 | 2020-04-17 | 中国海洋石油集团有限公司 | Continuous blasting and purging device for pipeline and blasting and purging method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3806232A1 (en) * | 1988-02-27 | 1989-09-07 | Otto Plambeck | Explosive method for cleaning steel pipes to which concrete has adhered |
| DE19500149C2 (en) * | 1995-01-04 | 1997-02-13 | Puhlmann Dietrich Dipl Ing | Process for the regeneration of drainage pipes, and arrangement for carrying out such a process |
| DE19808621A1 (en) * | 1998-02-28 | 1999-09-02 | Lanfermann | Drinking water well regeneration method |
| DE10021249A1 (en) * | 1999-11-27 | 2001-08-30 | Dynamit Nobel Gmbh | Connection element for detonator and detonation cord, comprises U-shaped trough for holding and fixing detonator, and trough for cord |
| DE10019174C2 (en) | 2000-04-07 | 2002-05-23 | Berliner Wasserbetriebe | Process for introducing regeneration and treatment liquids into vertical and horizontal wells |
-
1986
- 1986-06-23 DE DE19863620979 patent/DE3620979A1/en not_active Withdrawn
- 1986-06-27 GB GB08615719A patent/GB2192039A/en not_active Withdrawn
- 1986-07-03 FR FR8609669A patent/FR2601056B3/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0913664A3 (en) * | 1997-10-29 | 2000-10-18 | Berliner Wasserbetriebe Anstalt d. öffentlichen Rechts | Device for mounting a detonating cord in a horizontal filter well |
| US7959432B2 (en) * | 2005-06-01 | 2011-06-14 | Frans Steur, Senior | Method of and apparatus for cleaning fouling in heat exchangers, waste-heat boilers and combustion chambers |
| CN111014196A (en) * | 2019-12-25 | 2020-04-17 | 中国海洋石油集团有限公司 | Continuous blasting and purging device for pipeline and blasting and purging method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3620979A1 (en) | 1988-01-07 |
| GB8615719D0 (en) | 1986-08-06 |
| FR2601056A1 (en) | 1988-01-08 |
| FR2601056B3 (en) | 1988-11-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |