SE1251344A1 - Method and apparatus for improving an energy well - Google Patents

Abstract

Collector pipe device for use in a drilled energy well (700) in the ground, which collector pipe device comprises at least a first pipe part (710), arranged to run along the longitudinal direction of the well and lead a heat carrier towards the bottom of the well, and at least a second pipe part (711). arranged to run along the longitudinal direction of the well and bring the heat carrier in the direction of the mouth of the well. The invention is characterized in that the collector pipe device further comprises a flexible container (720) with side cradles and a duct opening, which container is arranged to be inserted into the well together with said pipe parts into an inserted layer, in which the container runs substantially parallel to the first and second pipe parts along with the longitudinal direction of the well, since the container is arranged to be filled with a liquid in said inserted layer, the side cradles of the container pushing outwards in the radial direction of the well due to the pressure of the water and the side cradles of the container thereby pushing the first pipe part away from the second pipe part. The invention also relates to a method. Application text document 2012-11-28 120053EN

Description

close together, and still achieve the same efficiency.

Shallower holes naturally entail lower costs.

Different ways have therefore been proposed to press apart the parts of the collector pipe inside the well, and at the same time press the parts against the inner walls of the well.

For example, there are devices where pre-assembled spacer elements separate the collector tubes at a certain constant predetermined distance or by means of a spring load which presses the collector tubes from each other. Such a collector pipe has the disadvantage. that it is difficult to bring down into the hole, due. of friction against the inner walls and that the collector tube tends to get stuck in irregularities in the well. In addition, a balance must be made between said distance or spring load and the final contact of the collector tube with the inner walls of the hole.

Another solution is that the collector pipe is delivered with a fold-out spacer device between the pipe parts, which. is recessed and locked. with. using a water-soluble material. When the collector pipes are lowered. in the hole and comes into contact with the groundwater therein, the material dissolves, and the spacer is precipitated, for example with. using compression springs. Such collector pipes suffer from the problem that once they have been lowered into the hole, and the spacer has been unfolded, it is often not possible to move further up or down. If problems are encountered during the lowering, it may thus be the case that the collector tube has time to get stuck before the problems have been solved.

It is also known, from the publication "SEALING OF DRILLS WITH GREEN COLLECTOR II CRYSTAL 'BERG", published in November 2010 by Geostrata HB in S Sandby, to arrange a bag of liquid-tight material: L a drilled energy well, in purpose of sealing Application interior document 2012-11-28 120053EN the interior of the well against the surrounding ground, a collector pipe is then lowered inside the well equipped with the bag.

The present invention solves the problems described above.

Thus the invention relates to a collector pipe device for use in a drilled energy well in the ground with a mouth and a bottom and a longitudinal direction and a radial direction, which collector pipe device comprises at least a first pipe part, arranged to run along the longitudinal direction of the well and, in the first pipe part carry a heat carrier in the direction of the bottom of the well, and at least a second pipe part, arranged to run along the longitudinal direction of the well and in the second pipe part guide the heat carrier in the direction of the well mouth, and characterized in that the collector pipe device container with side walls and an end opening, which container is arranged to be inserted into the well together with said pipe parts to an inserted position, in which the container runs substantially parallel to the first and the second pipe part along the longitudinal direction of the well, in that the container is arranged that in said inserted position it can be filled from the mouth of the well with a liquid, whereby the side walls of the container are pushed outwards in the radial direction of the well due to the pressure of the liquid against the side walls, and because the side walls of the container thereby push the first pipe part away from the second pipe part.

The invention also relates to a method for effecting heat exchange between a drilled energy well in the ground which method uses and. a heat carrier, of such a collector tube device.

Application invention document 2012-11-28 120053EN The invention will now be described in detail, with reference to exemplary embodiments of the invention and the accompanying drawings, in which: Figures 1a and 1b are respective principle sketches as. from the side and in cross section, an collector tube device according to the present invention arranged in an energy well illustrates an unfilled and filled position, respectively; Figures 2, 3 and 4 are respective principle sketches illustrating from above and in cross section three different collector tube devices arranged in a respective energy well according to the invention; Figure 5 is a cross-sectional view of a folded container; Figure 6 is a cross-sectional view of a collector pipe device according to the invention; and Figure 7 is a schematic diagram illustrating from the side and in cross section the installation of a collector pipe device according to the invention.

Figures 1a and 1b show, with common reference numerals, a collector pipe device according to the present invention, for use in a drilled energy well 100 in the ground. The energy source 100 has a mouth 102 and a bottom 103, as well as a longitudinal direction L and a radial direction R. The longitudinal direction L preferably has, but does not necessarily have, a vertical. It is preferably a component, and is preferably substantially vertical. . ensure that the energy well is at least 100 meters deep, at least 150 meters deep. It is preferably in the form of a substantially evenly thick cylinder, preferably a circular cylinder, which preferably has between 5 and 50 cm as the largest diameter. Preferably it is drilled in hard material, such as rock, but it may also be drilled in porous material, such as soil, or mixed material. The well is preferably filled with groundwater, but can also be drained.

The collector pipe device comprises at least a first pipe part 110, arranged to run along the longitudinal direction L of the well 100 and in the first pipe part 110 guide a heat carrier in the direction of the bottom 103 of the well. In addition, the collector pipe device comprises at least a second pipe part 111, arranged to run along the longitudinal direction L of the well 100 and in the other pipe part. 111 moving said heat carrier in the direction of the mouth 10 of the well 100. Thus, the heat carrier is circulated up and down in the well 100 in a pipeline system comprising the pipe sections 110, 111. The pipe sections, which may be more than two in number, are interconnected so that the heat carrier can circulate. cooled down in the well 100 towards the bottom 103 and then up again through. at least one closed well 100 orifice 102 circuit, so that the heat carrier is preferably kept separated from the interior of the well 100. Introduction of the heat carrier into the pipe part 110 and discharge out of the pipe part 111 can take place in a conventional manner, such as that the pipeline system forms part of a per se conventional device for rock heating and / or rock cooling (not shown), where the heat carrier by means of a pump is circulated between the well 100 and a heat exchanger in a closed circuit.

When the heat carrier is circulated in the well 100, in the pipeline device, a heat exchange takes place between the heat carrier and the surrounding ground, via any water 101 or air in the well 100 and the well walls. The heat carrier which is led up from the well 100 therefore has a temperature which is closer to the temperature of the surrounding ground compared to the heat carrier which is led down into the well 100, which thus entails a temperature difference between the pipe parts 110 and 111. These circumstances make it desirable when operating the collector pipe device, keep the pipeline parts 110, radial R joint, 111 as far apart from each other as Inöjligt i and. also1 as close to the well wall as possible.

In order to achieve this, according to the invention the collector pipe device comprises a flexible container 120 with side walls 121 and an end opening 122. The container 120, which is preferably closed in one end 123 opposite the end opening 122, is arranged to be inserted or lowered. in the well 100 together with the pipe parts 110, 111 to an inserted position. In this position inserted, as illustrated in Figure 1a, the container 120 runs substantially parallel to the pipe sections 110, 110 along the longitudinal direction L of the well 100.

When in the inserted position, the container 120 is further arranged to be able to be filled, from the mouth of the well 100 and. via the end opening 122, with. a liquid. The liquid is, but need not be (see below) water or an aqueous solution which consists mainly of water but which may have additives, such as antifreeze.

When the container 120 is filled with said liquid, its side walls will be pushed outwards in the radial direction R of the well 100, due to the pressure of the liquid against the side walls, and the side walls of the container 100 will thereby press the pipe parts 110, 111 away from each other. Preferably, the pipe parts 110, 111 are thus pressed, also in the direction of each opposite inner wall in the well 100, preferably so that they have direct contact with the respective inner wall. This is thus illustrated in Figure 1b.

Figures 2, 3 and 4 illustrate alternative pipe arrangements to which the invention is applicable. These figures are all illustrated, in the above-mentioned introduced position and. in cross section from above.

Figure 2 illustrates the case of two pipe sections 210, 211, where one 210 leads the heat carrier down into the well 200 and the other Application header leads the heat carrier back up out of the well 200. The container 220 is arranged between the pipe sections 210, 211, and upon liquid filling, presses them apart in a direction D1.

Figure 3 illustrates the case of four pipe sections 310, 311, 312, 313 running along the longitudinal direction of the well 300. Two 310, 312 of these are arranged to move the heat carrier towards the bottom of the well 300 and the other two 311, 313 are arranged to move the heat carrier towards the mouth of the well 300.

It will be appreciated that the heat carrier can then be moved either in two separate series-connected, parallel-connected loops or in a single, loop. The side walls of the container 320 are in this case arranged to press at least two of said four pipe parts 310-313, or at least two groups of said four pipe parts 310-313, away from each other when the container 300 is filled with liquid. Preferably, all four pipe sections 310-313 are pressed away from each and against a respective part of the second part of the well, in directions D2, 300 inner wall, preferably so that they each have direct contact with the respective part of said inner wall.

Figure 4 illustrates an alternative design, in which a plurality of pipe sections are arranged to run along the well 400 longitudinal son1 is arranged. to be direction; A central pipe part 410, centrally arranged in the inserted position, is arranged to move the heat carrier in a first direction in the longitudinal direction of the well 400.

The other pipe parts 411, which are preferably at least three in number, are arranged around the central one. the pipe part 410 in the inserted position, and are then arranged to bring the heat carrier to. opposite direction. When filling with liquid, the side walls of the container 420 are arranged to be pressed. the [peripheral pipe sections 411 away from the central pipe section 410, in a direction D3.

The container 420 may, but need not, be attached to the peripheral tubular members 411.

Application text docs 2012-11-28 120053EN In the preferred embodiments illustrated in Figures 2-4, the container 220, 320, 420 consists of a respective elongate, flexible bag-like structure, which is arranged. being, upon insertion into the well, arranged or being arranged between the pipe sections 210, 211; 310, 311, 312, 313; 410, 220, 411 to be pressed apart when filling the container 320, 420 with liquid.

A first preferred way of holding the container in place in its position between the pipe parts is to provide the container with pre-arranged so that the pipe parts can be folded, arranged in the folds when inserted into the well, and so that the container is held in place near the pipe parts. to be pressed One such apart, even while the actual pressing is taking place. container 500 is illustrated in cross section in Figure 5, which also shows two opposite such pre-folded folds 510, 520. Such a folded structure also makes the container 500 flat, whereby it can be easily transported, for example rolled up.

The present inventors have discovered that it is possible to arrange such a container 500 between pipe parts in an energy well in a way which keeps the container in place even during liquid filling, so that the pipe parts are pressed apart without the container sliding out of its desired position between the pipe parts. .

In some cases, it is preferred that the structure illustrated in cross-section in Figure 5 be provided with stiffer material in the longitudinal direction of the container 500 at least the areas of 520, just around the folds 510, so that the container 500 retains its folded folds 510, 520 in shape of indentations even when filled with liquid. This means that the respective pipe parts are better held in place in the folds 510, 520. It is understood that other numbers of pre-folded folds than two can be used, for example four pre-folded folds can be used to hold four pipe parts in place. in Figure 3, in the same way as for two pipe sections.

A second preferred way of holding the pipe parts in place relative to the container is that the collector pipe device comprises a plurality of fasteners 130, 230, 330, 730 (see Figures 1a, 1b, 2, 3 and 7) at different locations along the length of the collector pipe device. , which fastening devices are arranged to be able to fasten the container with the pipe parts during insertion so that the position of the pipe parts in relation to the container, possibly as in the longitudinal direction L, is fixed.Such fastening devices can for instance consist of cable ties fixed in the container, the strings or other fastening means intended to be fastened around a respective pipe part and thereby fix the pipe part in relation to the container.

Such fastening devices can advantageously be fastened in connection with the insertion of the collector pipe device into the energy well (see below in connection with Figure 7).

It is noted that no fasteners, at least not between the container 420 and the central pipe part 410, are required in the case of a central 410 and several peripheral 411 pipe parts shown in Figure 4, since the container 420 is then arranged around the central pipe part 410.

According to a third preferred way of holding the pipe parts in place, as illustrated in Figure * 6, the collector pipe device 601 comprises two pipe parts 610, 611 which are to be pressed, which container 611 is in turn kept fixed by means of liquid filling of a container 620, 620. at the pipe members 610, of prefabricated or pre-assembled fasteners 630, so that the pipe members. 610, 611 med. by means of the fastening means 630 is held in place in relation to the container 620. The fastening means 630 Application text docx 2012-11-28 120053EN 10 preferably runs along. the main length of the container 620. They are either mounted at even needle spaces, such as at least every twenty meters, more preferably at least every five meters, in the longitudinal direction of the container 620, or are fixed along a continuously continuous section of the length 620 of the container at the pipe sections 610, 611.

Figure 6 illustrates a preferred example of the latter case, namely that the tube parts 61, 61 and the container 620 form integral parts of the same material body, which material body is the substantially cylindrical body whose cross section is illustrated by dashed lines in Figure 6. the section thus encloses the inner 610a of the first pipe part 610, the inner 611a of the second pipe part 611 and the inner 620a of the container 620. In other words, the container 620 forms an integral part of the collector tube device 601. Such an arrangement entails both simple installation in the energy well and that the pipe parts 610, 611 are kept in place in relation to the container 620.

It is noted that the invention, in addition to the ready-to-install combination of pipe parts and containers, also relates to a collector pipe device in mounted, ready-to-operate condition in the inserted position in an energy well.

Figure 7 further illustrates a method of the present invention for effecting heat exchange between. a drilled energy well 700 in the ground and a heat carrier. In the well 700, which comprises an orifice 702 and a bottom 703 and a longitudinal direction L and a radial R direction, a collector pipe system comprising at least first 71 and second 71 pipe parts is mounted together with a flexible container 720 with side walls 721 and an end opening (not shown, 760). is thus obscured by the roller In the assembled condition, the pipe parts 710, 711 Application text docs 2012-11-28 120053EN ll and the container 720 run substantially parallel, along the longitudinal direction L of the well 700.

The assembly itself takes place so that the pipe parts 710, 711 are inserted into, or down into, the well 700 together with the container 720. A way of achieving this. this. is that a pre-assembled collector pipe system according to the invention, where when the container is attached to the pipe parts or surrounds a central pipe part, is lowered into the well 700. Another way is that the actual assembly of the collector pipe device takes place in connection with its insertion into the well. 7.

It is this latter method which is illustrated in Figure Thus, on the one hand, the container 720, which is stored in a folded state on, and in roll 760, a direction D5 is rolled off, a and. on the other hand, the pipe sections 710, 711 above the mouth 702 of the well 700, where the sections are also fastened together at regular intervals by means of fastening devices 730 as described above. Initially, the opening end 723 of the container has also been attached, by means of a fastening device 750, to a bottom weight 740, which thereby keeps the container 720 stretched in the longitudinal direction L. The feeding and fastening continues until the entire collector tube device is immersed to the desired depth in the well 700. Such an assembly method means that a container 720 according to the invention can be used together with existing collector pipes 710, 711 and a possible existing weight 740 in order to be able to separate the pipe parts 710, 711 and press apart in a simple manner in the next step. them by filling the container 720.

Thus, after the assembly of the collector pipe device is completed, and it is in the inserted position described above in which the container 720 runs substantially parallel to the pipe parts 710, 711, heat carriers can thus be circulated in the pipe parts 710, 711 according to above, so that the heat exchange is achieved.

Once the collector tube assembly is in the inserted position, the container 720 is then filled, from the mouth, with a liquid, the side walls of the container 720 being pushed outwards in the radial direction R of the well 700 due to the pressure of the liquid against the side wall 711 away from the wolves, and pressed hence the fittings 710, others.

What has been said above in connection with Figures 1a-6 is also applicable to the method illustrated in Figure 7 and vice versa.

The container 720 may be liquid tight or liquid permeable.

According to a preferred embodiment, the liquid filled into the container 720 consists essentially of water. It preferably consists of substantially pure water, or alternatively water with a suitable antifreeze additive. In this case, it is preferred that the container 720 be liquid tight, so that the filled liquid remains in the container and so that the liquid pressure therein continues to press apart the pipe parts 71, 711 even after the filling has ceased and the upper opening of the container 720 has possibly been closed. .

The well 700 may but need not be water-filled 701. Especially with such water-filled wells 700, it is preferred that the liquid be supplied so that an overpressure is formed in the container 720 in relation to the pressure in the well 700 at a certain depth.

This causes the walls of the container 720 to be able to press apart the pipe parts 71, 711 while overcoming the ambient water pressure in the well 700.

Application text document 2012-11-28 120053EN l3 In other cases as well, it is preferable that such an overprint is achieved. A preferred way of producing such overpressures is to arrange a liquid surface 124 (see Figure 1b) at a sufficient height, preferably above, the water surface 101 so that the required overpressure is produced. Another preferred method is to supply the liquid under overpressure, such as adding water. via the municipal. the water supply network via, a valve (not shown) is held during the utilization of the water pressure provided thereby, and. maintain. the overpressure produced, by means of an Äback valve or * equivalent in itself conventional means, after the filling has been completed.

An alternative, which is especially preferred for wells 700 drilled in soil or porous soil, is that the container 720 be water permeable, for example genonl that it is porous.

The liquid in this case consists mainly of soil involved in the certain liquid a certain liquid, preferably drilling masses. is preferably water. In this way, solid material can be introduced into the borehole in a manner which is both gentle on the collector pipes and which presses them apart. The water will seep out of the container 720 and down into the surrounding soil, but the solid material remains in the container 720. If and when the borehole collapses, as the surrounding soil closes around the container 720, the pipe parts 710, 711 will then not compressed again. Also in another preferred embodiment, the container 720 is porous, namely in the case where the liquid consists of a liquid substance which. can cure or solidify to a solid consistency, such as bentonite slurry which can cure to bentonite clay. In this case, it is preferred that the container be permeable to the liquid, but only to such an extent that liquid upon filling seeps out through the walls of the container 720 slowly enough for a sufficient pressure gradient to be present between the container 720 inner and the surrounding well 700 to prevent the pipe members 710, 711 from being compressed before the slurry has hardened and the entire structure has been fixed. Before final curing, it is also preferred that sufficient slurry has time to penetrate the perforations of the container to fill the remaining space in the well, so that the end result is a bentonite clay-filled well with separated pipe sections. This means that an energy well can be sealed with clay, which is often desirable for noise protection reasons, while a good separation between the pipe parts can be guaranteed.

In this context, it is preferred that the container 720 has a cross-sectional area in a completely liquid-filled state which is sufficiently large to substantially completely fill the well 700 in cross-section. This means that the slurry can fill the container 720 and thus also substantially the entire well 700. that the container is permeable to slurry, a certain part of the slurry can then seep out and seal any remaining air pockets in well 700.

In case the filled container 720 in cross section is smaller than the well 700, it is preferred to fill the container with slurry in stages, starting from the bottom 703 of the well 700. In this case, the slurry is thus filled and allowed to solidify in steps of about 1-10 meters at a time, and any air pockets outside the container 720 are sealed with slurry that is fed directly to the well 700, outside the container 720, before the next stage begins.

The pipe parts are preferably made of a plastic material.

In other cases, the container may, for example, be made of a liquid-tight or perforated, flexible plastic or rubber material, or alternatively a textile material.

Application text docs 2012-11-28 120053EN The above preferred embodiments have been described. However, it will be apparent to those skilled in the art that many changes may be made to the described embodiments without departing from the spirit of the invention.

For example, more than four pipe sections can be used in a manner similar to that illustrated in Figure 3, and more or less than 8 peripheral pipe sections can be used in a collector pipe device according to Figure 4.

Furthermore, the energy well may have a different longitudinal direction than vertical, such as a well drilled obliquely downwards.

Thus, the invention should not be limited to the embodiments described, but may be varied within the scope of the appended claims.

Application text document 2012-11-28 120053EN

Claims (19)

1. 0 15 20 25 30 l6 P A TP E li T K I {.A V l. Collector pipe device for use in a drilled energy well (100; 200; 300; 400; 700) in the ground with a mouth (102; 702) and. a bottom (103; 703) and one (R), at least one longitudinal direction '(L) and a radial direction which collector tube device comprises first pipe part 4110; 60; 710), (10; 2010; 310.3l; arranged to run along the longitudinal direction of the well and in the first pipe part carry a heat carrier in the direction of the bottom of the well, and at least a second pipe part (lll; 2ll; 3l2,3l3; 4ll; 6ll; 7ll), arranged to run along the longitudinal direction of the well and in the second pipe section, move the heat carrier towards the mouth of the well, characterized in that it further comprises a (120; 220; 320; 420; 500; 620; 720) (222), flexible container collector pipe device with side walls and a end opening which container is arranged to be inserted into the well together with said pipe parts to an inserted position, in which the container runs substantially parallel to the first and the second pipe part along the longitudinal direction of the well, in that the container is arranged to in said inserted position be able to be filled from the mouth of the well with e n liquid, the side walls of the container being pushed outwards in the radial direction of the well due to the pressure of the liquid against the side walls, and by the side walls of the container thereby. presses the first pipe part away from the second pipe part. 2. Collector pipe device according to. Claim 14, characterized in that the collector pipe device comprises at least four pipe parts (310,3l, 3l2,3l3) (300), arranged to run along the well, two being arranged to move the heat carrier in the direction of the bottom of the well. and. the others. two are arranged to move the heat carrier in the direction of the mouth of the well, and in that the side walls of the container (320) are arranged to, in the mentioned inserted position, press at least two of the application text docs 2012-11-28 120053EN 10 15 20 25 30 35 17 said four pipe sections or at least two groups of said four pipe sections * away from each other when the container is filled with liquid. Collector pipe device according to claim 14, characterized in that the collector pipe device comprises a plurality of pipe parts (410,411) (400), arranged to run along the well, of which a central pipe part (410), son1 is arranged, to be centrally arranged in the inserted position, are arranged to move the heat carrier in a first direction in the longitudinal direction of the well and the others (411), which are arranged to be arranged around the central pipe part in the inserted position, are arranged to move the heat carrier in the opposite direction, and in that the side walls of the container (420) are arranged to press said other pipe parts away from said central pipe part when the container is filled with liquid. 4. A collector pipe device according to any one of the preceding claims, characterized in that the container (120; 220; 320; 420; 620; 720) is constituted by an elongate bag arranged to, upon insertion into the well (100; 200; 300; 400; 700 ), is arranged or be between the pipe parts (110,111; 210,211; shall be arranged 310,311,312,313; 410,411; 610,611; 710,711) which are pressed apart when filling the container with liquid. Collector pipe device according to claim 4, characterized in that the container (500) comprises pre-folded folds (510,520), arranged so that the pipe parts can be arranged in the fold when inserted into the well, so that the container is kept in place in its position between the fittings to be pressed apart. Collector pipe device according to claim 4 or 5, characterized in that the collector pipe device comprises a plurality of fastening devices (130; 230; 330; 730) at different places along the length of the collector pipe device, which fasteners. 18 arrangements are provided to be able to fasten the container (120; 220; 320; 720) (110, 111; 2110, 211; 3110, 311, 3112.313; 710, 711) to the pipe parts during insertion so that the position of the pipe parts in relation to the container is fixed. Collector pipe device according to one of Claims 1 to 4, characterized in that the collector pipe device (620) aV comprises fastening means (630) which fix the container to the pipe parts (61, 611) which are to be pressed apart when filling the container, so that the pipe parts with by means of the fastening means are held in place in relation to the container. k ä n n e t e c k - (620) Collector pipe device according to claim 7, n a d a v that the pipe parts (61, 611) and the container constitute integral parts of the same body of material. 9. A collector tube device according to any one of the preceding claims, characterized in that the container (120; 220; 320; 420; 500; 620; 720) is liquid-tight. any of claims 1-8, (120; 220; 320; 420; 10. lO. Collector pipe device according to the feature that the container 500; 620; 720) aV is porous. 11. ll. Method for effecting heat exchange between a drilled energy well (10O; 200; 300; 400; 700) in the ground and a heat which energy well comprises * an orifice (10 2; 702) (10 3; 703) (R), first carrier , and. a bottom and a longitudinal direction '(L) and a radial direction wherein a collector pipe system, comprising- (110; 2110; 310, 311; 410; 610; 710) (III; 211; 3112.313; 411; 611; 711) tooth at least and other pipe parts which, when mounted, run along the longitudinal direction of the well, are mounted in the energy well, after which the heat carrier is circulated in the pipe parts so. that mentioned. heat exchange is achieved, k ä n n e t e c k n a t a V that a flexible container (l20; 220; 320; 420; 500; 620; 720) Application textdocx 2012-11-28 120053EN 10 15 20 25 30 35 19 with. side walls and. an end opening (122) is mounted in the well together with said pipe parts in a position inserted in the well, in which the container runs substantially parallel to the first and the second pipe part along the longitudinal direction of the well, by the container. in said inserted position is filled from the mouth of the well with a liquid, the side walls of the container being pushed outwards in the radial direction of the well due to the pressure of the liquid against the side walls, and because the side walls of the container thereby press the first pipe part away from the second pipe part. Method according to claim 11, characterized in that the container (120; 220; 320; 420; 620; 720) is made to consist of an elongate bag which upon insertion into the well (100; 200; 300; 400; 700) is arranged between the pipe parts (110,111; 2110, 211; 3110, 311, 312,3,3; 410, 411; 610, 611; 710, 711) which are to be pressed apart when filling the container with liquid. 13. A method according to claim 11 or 12, characterized in that the container (500) is caused to comprise pre-folded folds, and in that the pipe parts (510,520) are arranged in the folds upon insertion into the well, so that the container is held in place in its position between the pipe parts to be pressed apart. according to any one of claims 11-13, k n n e - (ll0, lll; 2l0,2ll; (l20; 220; 320; 720) 14. A method characterized in that the pipe parts 310, 311, 3l2,3l3; 710, 711) and the container are fastened together by means of a plurality of fastening devices (130; 230; 330; 730) which are mounted in different places along the length of the container during insertion. , so that the position of the pipe parts in relation to the container is thereby fixed. 11-14, k ä n n e - (610,611) (620) Method according to one of the claims characterized in that the pipe parts to be pressed apart when filling the container are fixed in advance. Application text doc. 2012-11-28 120053EN 10 15 20 25 20 to the container by means of fastening means (630), so that the pipe parts with the aid of the fastening means are held in place in relation to the container. A method according to any one of claims 11-15, characterized in that the container (120; 220; 320; 420; 500; 620; 720) is of liquid ketate, and in that the liquid consists mainly of water. 17. A method according to any one of claims 11-15, characterized in that the container (120; 220; 320; 420; 500; 620; 720) is water-permeable, and in that the liquid consists mainly of soil mixed with water. 18. A method according to any one of claims 11-15, characterized in that the container (120; 220; 320; 420; 500; 620; 720) is porous, and in that the liquid consists of a liquid substance which can hard to solid consistency, and from the fact that the liquid fills the container when pressed and by overpressure presses (110,111; 210,211; 310,311,312,313; 410,411; the pipe parts freeze 6l0.6ll; 7l0.71l), after which sufficient liquid has time to penetrate the perforations of the container to fill remaining space in the well. 19. A method according to claim 18, characterized in that the liquid consists of bentonite slurry. Application text document 2012-11-28 120053EN