WO2020201537A1

WO2020201537A1 - Cleaning device

Info

Publication number: WO2020201537A1
Application number: PCT/EP2020/059634
Authority: WO
Inventors: Marcus BURG; Mohamad FATTAH AHMAD
Original assignee: Burg Marcus; Fattah Ahmad Mohamad
Priority date: 2019-04-05
Filing date: 2020-04-03
Publication date: 2020-10-08
Also published as: DE102019109012A1; EP3947891A1

Abstract

The present invention relates to a cleaning device (1) for cleaning an auger (30), preferably an auger of a kelly drilling apparatus, the cleaning device comprising a retainer and an auger cleaner (14), which is to be fastened or is fastened to the retainer and has cleaning elements (21). According to the invention, the retainer is designed as an auger (2) for use in the kelly drilling method, which can be screwed into a substrate (U), and the auger (2) used as the retainer can be or is reversibly coupled or is permanently connected to the auger cleaner (14). The present invention further relates to a corresponding use and to a corresponding method.

Description

Cleaning device

The invention relates to a cleaning device for cleaning a screw auger, preferably a auger (Kelly auger) egg nes Kelly drilling device, with a bracket and a screw cleaner to be fastened or fastened to the bracket. The invention also relates to a corresponding auger cleaner, a corresponding use and a method for making such a cleaning device available.

In known drilling devices for creating boreholes in the ground, the problem arises how the cuttings excavated by the auger, designed for example as a Kelly auger, can be removed, which does not fall down to the sides, but on the turns of the

Auger sticks. To clean the auger, it is known to either throw out the cuttings adhering to them at high speed or to shake them off by rapid acceleration when the auger changes its direction of rotation. Both variants have disadvantages. When being thrown out, people in the vicinity can be hit by the cuttings. When accelerating, the drive train is heavily loaded and there is a high level of noise pollution. In addition, the service life of the drive components is greatly reduced. To avoid these disadvantages, cleaning devices are known from the prior art, which are set up either on the excavator or drilling crane itself or on the ground. An example of the variant mentioned erstge can be found in DE 34 46 900 A1, in which an auger cleaning body is suspended parallel to the axis of rotation of the auger and is displaced vertically along the derrick. Here, the screw cleaning body can be pivoted from a rest position into a working position will. The auger is then rotated along the auger cleaning body to strip off the cuttings. US Pat. No. 3,968,846 discloses a cleaning device that can be set up independently of a drilling crane. Here, a vertically aligned, about a hori zontal axis of rotation passively rotatable cleaning disc with circumferential elevations is articulated on a pivotable lever arm, which is pivotable in the work area of a screw auger. The turns of the auger come into engagement with the elevations when the auger is rotated or moved longitudinally in order to scrape off the drill well in this way.

The disadvantage of the known cleaning devices is their relatively large technical effort and / or their lack of effectiveness.

It is the object of the present invention to provide a simple but effective cleaning device for augers, especially for augers for Kelly drilling rigs.

This problem is solved by the features of the independent claims. The advantages of the invention are in particular that, compared to being thrown out or the abrupt change of direction, the

Auger no noise is generated, no bystanders are endangered and the moving machine parts are protected. Compared to the known cleaning devices arranged independently of the drilling device, there is the advantage that the device according to the invention is very simple and, in particular, no separate construction is necessary for the holder, since a conventional auger of the Kelly type (Kelly auger), which is therefore designed for use in the be known Kelly drilling method, is used as a bracket anchored in the ground. This holder ensures sufficient stable hold for the entire cleaning device. At the free end area of the auger that is not screwed into the ground, a Snail cleaners can be attached or attached reversibly. In a further embodiment, the auger and auger are permanently connected to each other, for example by welding the auger and auger, this permanent connection preferably being implemented before the auger is screwed into the underground.

The auger cleaner coupled with the auger - reversibly or permanently - is particularly preferably free when the auger is screwed into the ground, i.e. does not require any further supports on the ground or on another facility.

Due to the fact that the auger serving as a holder is a Kelly auger, in the case of a reversible coupling of the worm and auger, a Kelly rod - usually telescopic - can be reversibly coupled to the auger as an alternative to the auger cleaner, as is used for auger is the standard for the Kelly drilling process. This makes it possible, in particular, to screw the auger (Kelly auger) serving as a holder into the ground or into the subsurface with the help of a coupled Kelly rod, which in turn is connected to a rotary drilling device, then uncouple the Kelly rod and then remove the screw cleaner - preferably also with the help of a kelly bar coupled on the one hand to the auger cleaner and on the other hand connected to a rotary drilling device - to be coupled to the free, out of the subsurface lowing end of the auger screwed into the subsurface serving as a holder. The auger cleaner of the Rei cleaning device thus established is particularly preferably free-standing, ie it does not need any support or support. The cleaning device can be dismantled in the opposite direction, preferably again with the aid of a Kelly bar coupled with a rotary drill. Alternatively, it is also conceivable to unscrew the auger cleaner and the holder designed as a screw auger together out of the subsurface in the coupled state, a Kelly rod coupled to a rotary drilling device preferably also being used here.

With a permanent connection of auger cleaner and auger serving as a holder, which can be realized in particular by welding the end regions facing each other, the cleaning device as a whole can be installed in an underground by means of a Kelly bar, which is coupled to the free end of the auger cleaner screwed in (and also unscrewed again), the auger being anchored in the ground and the auger cleaner preferably standing free above the ground, so no further support is required. Alternatively, a permanent connection can also be implemented when the auger is already screwed into the ground and then permanently connected to the auger cleaner, for example by welding.

In the present case, a permanent or permanent or permanent fixed connection is understood to mean a connection that can only be separated by means of destruction. Such a permanent connection can for example and advantageously be realized by means of welded connections.

The auger serving as a holder and the auger cleaner are particularly preferably directly and immediately, ie without intermediate pieces, can be coupled with one another. In this case, for example, screws and / or split pins are used to connect the auger cleaner and auger to one another so that they are securely held together during use; Intermediate pieces between the areas of Auger cleaner and auger are not provided in this preferred embodiment. Alternatively, however, it is also possible to use one or more intermediate pieces in order to also be able to use, for example, auger cleaners (and / or auger) according to the invention, which in particular have no square connection.

The auger serving as a holder and the auger cleaner preferably have coupling pieces that correspond to one another. In the case of conventional auger for Kelly drilling rigs (Kelly auger), for example, a square connection is provided, which is also preferred in the present case in order to be able to fall back on existing constructions. For this reason, the auger cleaner is preferably also provided with a corresponding square connection. Thus, the coupling piece, which is already present on the auger serving as a holder, can be used to directly, i.e. directly to be coupled with her, either reversibly or with a permanent connection, in particular a welded connection.

Known couplings with square connections advantageously have in one coupling piece a circumferential, rectangular cross-section structure with four side walls arranged on an end base and in the other coupling piece an inner part to be inserted into this structure, with one or more fasteners, for example split pins or screws through - in coupled state of the two square connections - aligned openings are made to reversibly couple the auger and the auger cleaner with each other. After a coupling (with or without the aforementioned fastening means), the auger cleaner and the auger can alternatively also be welded to one another, the welded connections preferably being set in the area of the coupling pieces. It is an advantage of the aforementioned design of a reversible coupling that a Kelly rod of a Kelly drilling device can be used to screw in the Kelly auger serving as a holder (still without a coupled auger cleaner), which is preferably connected to the corresponding, also as a Vierkantan circuit formed coupling piece of the auger is coupled.

Preferably, the free Endbe opposite the coupling piece of the screw cleaner is also designed such that it can be coupled to a Kelly bar. Thus, the auger cleaner can be coupled with the Kelly bar and in particular transported to bring the auger cleaner to set up the cleaning device to the turned auger or to convey it away during dismantling, for example by moving the crane.

If, on the other hand, the auger cleaner is already coupled to the auger, in particular is permanently connected to it (for example welded), the cleaning device thus obtained can also be used as a whole by means of a Kel lys rod coupled to the free end of the auger cleaner, which in turn is attached to a rotary drilling device , transported and also screwed in and out of a substrate.

According to a preferred embodiment, the auger cleaner has an elongated support body made of, for example, stainless steel, which preferably comprises a tube, a rod or a box section. The tube, the rod or the box section are preferably taken from steel gefer. The cleaning elements are arranged on these, for example screwed, bolted or welded, which, according to an advantageous embodiment, protrude outward from the support body. The cleaning elements can, for example, at their area to be attached to the support body, for example a free end, an external thread aufwei sen, which in corresponding internal thread in a wall of the support body be screwed in. As a result, the cleaning elements can be exchanged very easily.

The elongated support body and the auger are preferentially aligned with one another in the coupled state. With the cleaning device anchored in the ground, a high level of stability is achieved in this way.

The auger cleaner can furthermore - alternatively or additionally - have a housing that is open at least on one side, preferably upwards, with a drill auger to be cleaned being retractable from said side. Here cleaning elements are arranged on the housing, which protrude into the housing. When the auger to be cleaned retracts, the cleaning elements strip off the adhering soil.

If the said housing is provided, it is advantageously fastened, for example screwed or welded, to the aforementioned support body, in particular designed as a tube, rod or box section. In the case of, for example, strongly cohesive or loamy soil and correspondingly large adhesion of the cuttings to the auger to be cleaned, this auger can be moved into the housing from the open side, preferably from above, in order to use the cleaning elements placed there as much as possible over its to clean the entire scope. In addition, the auger cleaner can, as described above, have cleaning elements protruding freely outward, to which the cleaning elements to be cleaned

Auger is brought in from the side and / or from above, for example by pivoting the drilling crane and / or by moving the Bohrbag gers (depending on the version).

In another embodiment, only the housing is provided with inwardly protruding cleaning elements, so there are no cleaning elements that protrude freely outward from the support body. According to a preferred embodiment, the cleaning elements are designed as pieces of rope or as rods, each made of steel, for example. In an alternative embodiment, the cleaning elements are made of robust plastic, for example. The rope pieces or rods can have different diameters and / or different lengths. They preferably protrude at different angles from the tube or the box profile or into the said housing. Furthermore, the rope pieces or rods are preferably designed to be exchangeable.

The cleaning elements can for example have a length of 50 to 100 cm, advantageously between 60 and 80 cm.

According to an advantageous embodiment, the auger cleaner has a plurality of modules adjoining one another at the end, at least two of the modules having cleaning elements. The modularity increases the application possibilities of the auger cleaner, since depending on the application, more or fewer modules with advantageously a different number and / or differently designed cleaning elements can be used.

Under the snail cleaner, whose lowest cleaning elements are preferably at least one meter away from the ground, one or more containers can be placed next to each other, into which the cuttings stripped by the cleaning elements fall and can then be transported away.

A typical length of the auger to be screwed into the ground using the Kelly drilling method is, for example, approximately 2 to 4 m. The turning depth of the auger into the ground is, for example - depending on the application - 75-95% of its usable length. Also a snail cleaner can have a comparable length. In the case of a modular design, individual modules are, for example, 1-2 m long. The cleaning elements can end, for example, at a height of 2 m above the ground so that the stripped cuttings can collect below without it accumulating too quickly and reaching up to the cleaning elements and then hindering a cleaning of the screw windings. It is also possible to support a container.

The invention also relates to a screw cleaner according to claim 14, which is designed as described above and has a coupling piece for coupling, reversible or with subsequent permanent connection, to a screw to be screwed or screwed into the ground, which accordingly for use in the Kelly drilling method is formed (Kelly auger).

The invention also relates to the use of an auger which is designed for use in the Kelly drilling process and which is used as a screw-in or screw-in holder for reversible or permanent attachment of a screw cleaner, in particular a screw cleaner as described above. The auger cleaner of the cleaning device thus obtained is preferably designed to be free-standing, i. E. only attached to the auger - reversibly or permanently.

The invention also relates to a method for providing a cleaning device as described above. Here, an auger designed for use in the well-known Kelly drilling process (Kelly auger) is screwed into a subsurface and an auger cleaner is attached to the protruding end of the auger, either directly or with an adapter. Alternatively, the cleaning device as a whole, i.e. the auger cleaner and the auger coupled to it - preferably permanently - transported to the destination and screwed into a subsurface with the help of said auger. In the following description of the alternative exemplary embodiments shown in the figures, the same reference numerals are used for features which are identical and / or at least comparable in their design and / or mode of operation. If these are not explained again in detail, their design and / or mode of action corresponds to the design and mode of action of the features already described above. The invention is explained in more detail below with reference to these figures. Show it:

1 shows a side view of a first embodiment of a cleaning device according to the invention, in which the flaming and the screw cleaner are not yet coupled to one another;

Fig. 2 is a side view of interconnected folding and

Auger cleaners, which together form the cleaning device;

FIG. 3 shows a plan view of the cleaning device according to FIG. 2;

4 shows a side view of a second exemplary embodiment of a cleaning device according to the invention;

FIG. 5 shows a plan view of the cleaning device according to FIG. 4, and FIG. 6 shows a modular screw cleaner. A first embodiment of a cleaning device 1 according to the invention is shown in FIGS. The cleaning device 1 has a holder for a screw cleaner 14, the holder according to the invention being designed as a Kelly auger 2 (in the following mostly abbreviated as auger 2), ie as a auger for use in the Kelly drilling method, which is from the prior art is known. The auger 2 has a helix 9 in order to be able to screw the auger 2 into a subsurface U and to be able to displace cuttings and to be able to ben aushe. At the end region 4 of the auger 2 facing away from the helix tip, a coupling piece 6 is provided, which in the present case is designed as a square connection 6a, as is also known from the prior art. The auger 2 is shown as it is screwed into an underground U (by means of a rotary drilling device, not shown, in the form of a drilling excavator or drilling crane). According to the present invention, the auger 2 is not used for the purpose of drilling a borehole, but as a holder for a screw cleaner 14. Due to its training as a Kelly type auger (Kelly drill), instead of the screw cleaner 14, a Kelly rod can also be coupled (see also below).

The auger cleaner 14 is shown in the side view of Fig. 1 in the not yet coupled to the auger 2 state, while it is connected to the auger 2 in Figs. 2 and 3 (see arrow f), the underground U only is indicated in each case. The auger cleaner 14 has an elongated support body 15 made of, for example, stainless steel, which in the present case is designed as a tube 15a. The support body 15 and the auger 2 curse th here. At the end region 19 facing the auger 2, the support body 15 has a coupling piece 16 which in the present case is designed as a square connection 16a corresponding to the square connection 6a of the auger 2. Thus a direct, immediate coupling of the auger cleaner 14 to the auger 2 with the aid of the coupling pieces 16, 6 possible. The square connections 6a, 16a, which are designed, for example, on the one hand as an open, four-walled hollow body and, on the other hand, as a cuboid that can be guided in this hollow body, for example designed as a hollow cuboid, in the coupled state each have two, each offset by 90 ° to each other, in pairs aligned with each other Through holes, through the split pins, screws, etc. can be used for securing (not shown).

At the opposite end region 20 of the support body 15, a coupling piece 17 is also provided, which is also designed as a square connection 17a. This is essentially constructed identically to the square connection 6a of the auger 2 in order to couple a - usually telescopic - Kelly bar 29, as is also indicated in FIG.

The Kelly bar 29 is in turn coupled to a drilling excavator or drilling crane (not shown) (generally: rotary drilling device) and is used to transport the auger cleaner 14 to the auger 2 serving as a holder, which can already be screwed into the underground U.

A Kelly bar 29 can also be coupled to the square connection 6a on the end region 4 of the Kelly auger 2 - when the screw cleaner 14 is disconnected. This configuration then corresponds to the known structure in a known Kelly rotary drilling device. The one serving as a holder

Auger 2 is thus formed according to the invention as a conventional Kelly auger 2 for use in the conventional Kelly drilling process and can be transported to the installation site of the cleaning device 1 using a Kelly bar and screwed into the underground U there.

The coupling between the screw cleaner 14 and the auger 2, shown in particular in FIG. 2, is designed to be reversible, so it can be released again. Alternatively, a permanent connection between the screw cleaner 14 and the auger 2 can be established, in particular special by welding the two end regions 4 and 19. Permanent In the present case means that the two parts can only be separated by destroying them. In the case of a permanent connection of auger cleaner 14 and auger 2, the cleaning device 1 obtained is preferably transported as a whole to the desired cleaning location, preferably by means of a Kelly rod coupled to a Kelly rotary drilling device, which is coupled to the free end area 20 of the auger cleaner 14 . At the desired location, the cleaning device 1 with the auger 2 serving as a holder is then screwed into the subsurface U so that it can be turned out again as a whole after use.

In the tube 15a, cleaning elements 21 are arranged interchangeably, which in the present case are designed as ropes made in particular of steel and have a thickened free end. According to a possible alternative, the cleaning bodies are rods made of steel or, for example, made of a plastic that can withstand the stresses and strains of cleaning. The cleaning elements 21 protrude from the support body 15 at different angles and with different lengths. In the exemplary embodiment shown, the ropes are arranged in such a way that they cover an angular range of approx. 45 ° (see the top view of FIG. 3). It is also possible that the ropes extend through the tube 15a on both sides. Furthermore, designs come into question in which the ropes protruding from the tube 15a - as seen from above - cover a smaller or larger angular range than the dargestell th, for example between 45 ° and 90 ° or larger. An all-round arrangement of the cleaning elements 21 at 360 ° is also possible.

As an alternative to an embodiment as a tube 15a, the support body 15 can be designed, for example, as a rod or as a box section. Instead of ropes as cleaning elements 21, these can also be designed as rods, for example. In Figs. 2 and 3, a drill auger 30 to be cleaned is shown in detail, which was driven from the side and / or from above to the auger cleaner 14 and is rotated, for example, so that cuttings between tween the turns of the auger 30 to be cleaned of the cleaning agents 21 is stripped off.

According to an alternative embodiment of a cleaning device 1, which is shown in FIGS. 4 and 5, the screw cleaner 14 has a support body 15 with an at least upwardly open housing 24, where cleaning elements 21 are arranged on the four side walls of the housing 24 at that are plugged into the housing 24 and screwed ver (with additional screws and / or an external thread on the respective cleaning rod and corresponding internal threads on the housing) or welded or bolted and protrude into the interior of the hous ses 24. In the present case, the housing 24 is also open at the bottom so that the cuttings stripped by the screw cleaner 14 can freely fall down to the ground. In the illustrated embodiment, the Ge housing 24 is arranged with one of its side walls on a support body 15 designed as a tube 15a, for example welded, with the upper and lower opening of the housing 24 in the direction of the extension of the auger 2.

The protruding into the housing 24 cleaning elements 21 are in the Ausfüh approximately example of FIGS. 4 and 5 in turn designed as steel cables (according to al ternative embodiments as rods made of metal or plastic). Furthermore, in the present case - analogously to the exemplary embodiment according to FIGS. 1 to 3 - cleaning elements 21, for example again ropes made of steel, are arranged on the tube 15a and project outward. Thus, an auger 30 to be cleaned can be freed from adhering cuttings both on the freely protruding cleaning elements 21 and by dipping into the housing 24. The auger 30 to be cleaned is shown retracted into the housing 24 in FIGS. 4 and 5. The spacing of the free ends of the steel cables from one another is preferably such that an auger 30 to be cleaned which is introduced centrally from above into the housing 24 is in contact with at least some steel cable ends. When the auger 30 to be cleaned is rotated, the cuttings are moved tangentially out of the turns of the auger 30 to be cleaned. Alternatively or additionally, the cuttings are cleaned by linearly moving the auger to be cleaned into and out of the housing 24 and along the free ends of the cleaning elements 21, which are designed as ropes.

The attachment of the screw cleaner 14 according to FIGS. 4 and 5 takes place in turn on a screwed into the ground U and thereby firmly anchored in the Bo the auger 2 of the Kelly type. Coupling pieces 6, 16 which correspond to one another are in turn preferably designed as square connections 6a, 16a. At the end of the screw cleaner 14 facing away from the auger 2, a coupling piece 17 is also provided, which is designed as a square connector 17a and to which a Kelly bar can be attached (see. Fig. 1-3).

According to an alternative, the screw cleaner 14 and the

Auger 2 can also be permanently connected to one another, for example by means of welding, the cleaning device 1 thus obtained being transported as a whole, screwed into a substrate and screwed out again.

In an embodiment not shown, only one housing 24 is provided on the support body 15. Cleaning elements 21 protruding freely into the outside space are not present in this embodiment, but can be attached. Finally, in FIG. 6, a screw cleaner 14 is shown, which consists of several modules 27a, 27b, 27c of essentially identical construction. These modules 27a, 27b, 27c all have cleaning elements 21 which are arranged in the same way on and around the respective support body 15. But there are also different angle covers (seen in plan view, see. Fig. 3) of the cleaning elements 21 of the various modules 27a, 27b, 27c possible. It is also not necessary for cleaning elements 21 to be provided on all modules 27a, 27b, 27c. In addition, there can be more or less than three modules 27a, 27b, 27c. Different lengths of the modules 27a, 27b, 27c can also be implemented. The coupling pieces 16, 17 of each module 27a, 27b, 27c are again preferably designed as square connections in order to allow coupling to a screw auger 2 (not shown in FIG. 6) screwed into the subsurface U as well as coupling to one another in accordance with FIGS a connection of a Kelly bar (not shown in Fig. 6) to enable the obers th module 27c.

All the exemplary embodiments shown in the figures have in common that the respective auger cleaner 14 is free-standing, i.e. with - reversible or permanent - coupling with a Kelly auger 2 screwed into the ground without any other support or articulation. This configuration allows maximum flexibility with regard to the use of the cleaning devices 1 with a simple construction at the same time.

The present invention is not restricted to the illustrated and described exemplary embodiments. Modifications within the scope of the patent claims are just as possible as a combination of the features, even if these are shown and described in different exemplary embodiments. Reference list

1 cleaning device

2 auger

4 end area

6 coupling piece

6a square connection

9 helix

14 snail cleaners

15 support body

15a pipe

16 coupling piece

16a square connection

17 coupling piece

17a square connection

19 end area

20 end area

21 cleaning elements

24 housing

27a-c modules

29 Kelly bar

30 auger to be cleaned

U underground

Claims

Patent claims

1. Cleaning device (1) for cleaning a screw auger (30), preferably a screw auger of a Kelly drilling device, with a holder and a screw cleaner (14) to be attached or fastened to the holder and having cleaning elements (21), characterized in that, that the bracket is designed as a screw auger (2) for use in the Kelly drilling process, which can be screwed into a sub-surface (U), the one serving as a bracket

The auger (2) can be reversibly coupled or reversibly coupled or permanently connected to the screw cleaner (14).

2. Cleaning device (1) according to claim 1, characterized in that the auger serving as a holder (2) and the auger cleaner (14) mutually corresponding coupling pieces (6, 16) for reversible coupling or for preparing a permanent th connection of the auger ( 2) and snail cleaner (14) have.

3. Cleaning device (1) according to claim 1 or 2, characterized in that the mutually corresponding coupling pieces (6, 16) have square connections (6a, 16a).

4. Cleaning device (1) according to one of the preceding Ansprü surface, characterized in that a Kelly bar (29) can be coupled to the free end region (4) of the auger (2) serving as a holding tion which cannot be screwed into the substrate (U) or screwed into it .

5. Cleaning device (1) according to one of the preceding Ansprü surface, characterized in that the free, the screwed Auger (2) facing away from the end region (20) of the Schneckenput zers (14) for coupling a Kelly bar (29) is formed.

6. Cleaning device (1) according to one of the preceding Ansprü surface, characterized in that the screw cleaner (14) has a support body (15) on which cleaning elements (21) are arranged.

7. Cleaning device (1) according to the preceding claim, characterized in that the support body (15) comprises a tube (15a), a rod or a box profile, wherein cleaning elements (21) from the tube (15a), the rod or the box profile protrude outwards.

8. Cleaning device (1) according to one of the two preceding claims, characterized in that the screw cleaner (14) comprises a housing (24) which is open at least on one side and into which an auger to be cleaned (30) can be moved, with the housing (24) cleaning elements (21) are arranged which protrude into the housing (24).

9. Cleaning device (1) according to the preceding claim, characterized in that the housing (24) on the support body (15), preferably designed as a tube (15a), rod or box profile, is arranged.

10. Cleaning device (1) according to one of the preceding Ansprü surface, characterized in that the cleaning elements (21) rope pieces or rods are preferably made of steel, which have different diameters and / or different lengths and / or different angular orientations.

11. Cleaning device (1) according to one of the preceding Ansprü surface, characterized in that the cleaning elements (21) are arranged interchangeably on the support body (15).

12. Cleaning device (1) according to one of the preceding claims, characterized in that the screw cleaner (14) has several modules (27a, 27b, 27c) adjoining one another at the end, at least two of the modules (27a, 27b, 27c ) Have cleaning elements (21).

13. Cleaning device (1) according to one of the preceding Ansprü surface, characterized in that with the auger (2) formed and screwed into the substrate (U) holder coupled or permanently connected screw cleaner (14) is free-standing.

14. Snail cleaner (14) with a support body (15), with cleaning elements (21) and with a coupling piece (16) provided in a free end region (19) of the support body (15), which becomes a coupling piece (6) a The holder designed as auger (2) for use in the Kelly drilling process corresponds to either reversibly coupling the auger (2) and the auger cleaner (14) or connecting them permanently to one another.

15. Snail cleaner (14) according to the preceding claim, characterized in that a coupling piece (16) is provided in the other free end region (20) of the Tragkör pers (15), which corresponds to a coupling piece of a Kelly bar (29).

16. Snail cleaner (14) according to one of the two preceding claims, characterized in that the snail cleaner (14) has several modules (27a, 27b, 27c) adjoining one another at the end. having, wherein at least two of the modules (27a, 27b, 27c) have cleaning elements (21).

17. Use one trained for the Kelly drilling process

Auger (2) as a holder that can be screwed or turned into a subsurface (U) for the reversible or permanent attachment of a screw cleaner (14), in particular a screw cleaner according to one of claims 14 to 16.

18. The method for making a cleaning device (1) available according to one of the preceding claims, wherein the holder designed as auger (2) for use in the Kelly drilling method is screwed into a substrate (U) and the auger cleaner (14) is screwed into the protruding end region ( 4) the auger (2) is attached or the cleaning device (1) as a whole with the auger (2) serving as a holder is rotated into a substrate (U).