WO2011015342A1 - Dispositif de pose de sonde géothermique - Google Patents

Dispositif de pose de sonde géothermique Download PDF

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Publication number
WO2011015342A1
WO2011015342A1 PCT/EP2010/004744 EP2010004744W WO2011015342A1 WO 2011015342 A1 WO2011015342 A1 WO 2011015342A1 EP 2010004744 W EP2010004744 W EP 2010004744W WO 2011015342 A1 WO2011015342 A1 WO 2011015342A1
Authority
WO
WIPO (PCT)
Prior art keywords
probe
head
geothermal probe
geothermal
ground
Prior art date
Application number
PCT/EP2010/004744
Other languages
German (de)
English (en)
Inventor
Guido Kania
Original Assignee
Rehau Ag + Co
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 Rehau Ag + Co filed Critical Rehau Ag + Co
Publication of WO2011015342A1 publication Critical patent/WO2011015342A1/fr

Links

Classifications

    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E21B7/205—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal
    • E21B7/206—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal using down-hole drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
    • F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
    • F24T10/15—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using bent tubes; using tubes assembled with connectors or with return headers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
    • F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
    • F24T10/17—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T2010/50—Component parts, details or accessories
    • F24T2010/53—Methods for installation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

Definitions

  • the invention relates to a geothermal probe installation device which is adapted to install a geothermal probe in the ground. Furthermore, the invention relates to a method for introducing a geothermal probe in the ground using a Erdettason- deneinbauvorraum and means for obtaining or storing geothermal ge with a geothermal probe, which introduced by the method for introducing a geothermal probe in the ground using a geothermal probe mounting device is.
  • Geothermal probes serve to extract heat energy from the soil or to store heat energy in the soil. Another application is to dissipate waste heat from cooling processes.
  • the heat transfer is accomplished by means of a fluid, which is passed in a pipe arrangement.
  • a fluid which is passed in a pipe arrangement.
  • U-probes are known in the form of two approximately parallel to each other in approximately perpendicularly introduced into the ground pipes, one of the tubes as a feed and the other tube serves as a return.
  • the tubes are connected at their foot end, that is, the lowest part in the ground, by a generally U-shaped deflection, which can be designed as a probe foot and the flow of fluid from the flow to the return allows connected.
  • geothermal probes Another known type of geothermal probes is the so-called coaxial probe.
  • a tube arrangement is selected in which an outer tube and an approximately coaxially received in the lumen of the outer tube inner tube is provided.
  • the outer tube is closed at its lowest point in the ground.
  • the liquid flow is then formed between the inner and outer tubes.
  • geothermal probes are typically installed in depths of up to about 300 m and more in the ground. Due to the prevailing in deep soil layers constant and increasing in particular increasing temperature levels geothermal probes are preferably installed as low as possible.
  • a hole is first drilled with the aid of a suitably suitable drill, and after reaching the desired depth drill head and drill pipe are removed from the well produced.
  • the geothermal probe is then sunk into this hole and filled the remaining annular gap between the inner surface of the borehole and geothermal probe with a suitable filling material.
  • the work processes that are associated with the production of the borehole so include the actual drilling process, as well as the preparation of the borehole for the geothermal probe to be introduced and also the operation of filling the borehole after introducing the geothermal probe require on the one hand a considerable amount of space to There, the required equipment on or off, as well as space is needed to bring equipment to the well, finally, more space is needed to create, for example, the Bohrteich.
  • the drilling pond is required to rinse and receive the drill bit from the wellbore.
  • Object of the present invention is therefore to provide a Erdtownsondeneinbauvorraum that overcomes the above-mentioned disadvantages, that is operable without the need for large and extensive equipment, and in particular allowed to install geothermal probes in the ground, without the existing building stock to a considerable extent affected become.
  • the geothermal probe mounting device should also be able to be used in places where the space available in the above-mentioned sense is extremely scarce.
  • Another object of the invention is to provide a method for introducing a geothermal probe into the ground using such a geothermal probe mounting device.
  • the geothermal probe installation device for introducing a geothermal probe into the ground, which has at least one geothermal probe with a probe head, which fluid-tight flow and return of a geothermal probe tube assembly interconnects, which is characterized in that the probe head is set in a propellant head, wherein the propellant head an earth rocket is assigned such that their impact energy acts on him.
  • the free space in the ground which serves to receive the borehole heat exchanger tube arrangement, is produced by means of a drive head, to which an earth rocket is assigned.
  • the Erdrakete is a known from the prior art device which acts by means of a pneumatic, hydraulic or electric drive by impact energy such that it moves through soil layers, in this way creates a free space through the soil layer, which then usable is.
  • a pneumatic, hydraulic or electric drive by impact energy such that it moves through soil layers, in this way creates a free space through the soil layer, which then usable is.
  • horizontal bores where, for example, a road is to be undercut by a line, such free spaces or cavities are produced with the aid of ground rockets.
  • the probe head of the geothermal probe tube assembly is fixed to the propellant head.
  • the propellant head absorbs impact energy of the earth rocket and displaces the ground creating a free space into which the geothermal probe installation device successively penetrates more deeply.
  • the probe head is fixed non-positively in the propellant head.
  • the probe head is fixed by means of at least one screw in the driving head.
  • a screw for fixing the probe head in the driving head is particularly advantageous if this is to be carried out on the construction site. It is particularly easy, fast and safe to set the probe head in the propellant head in this way. It is also included and advantageous in a modification of the invention if at least one tube of the borehole heat exchanger tube arrangement is fastened to a section in a force-locking manner on or in the driving head at least in a region near the probe head.
  • connection or the transition between the at least one tube of borehole heat exchanger tube assembly and the probe head is not burdened by tensile forces, but then the tensile forces then act exclusively on the pipe.
  • the propellant head is designed such that the penetration into the soil and / or the displacement of the soil is facilitated.
  • the propellant head is designed tapering in the direction of penetration.
  • pointed driving head designed, for example, cone or frustoconical, arrow-shaped, prismatic or be designed in the form of a partial ellipsoid of revolution. It is essential in the context of the present invention that the cross section of the propellant head at the end located in the direction of penetration, which is designed tapered, is substantially smaller than at the opposite end, at which the geothermal probe tube assembly is dragged.
  • the propellant head has a lubricious or lubricious coated surface.
  • a lubricious coated surface of the propellant head With a lubricious coated surface of the propellant head, it is possible - especially in different soil types - to bring about rapid and thus effective laying of the geothermal probe tube assembly in the ground.
  • a lubricious coating on the surface of the propellant head is used in particular a layer of a polymer material, which is also tough and has a low coefficient of sliding friction.
  • polyamide is very well suited for this purpose.
  • halogenated, in particular fluorinated hydrocarbons for example Teflon
  • Teflon fluorinated hydrocarbons
  • the propellant head is designed with respect to its surface in such a way that it is as homogeneous as possible, that is, has no cracks or bulges.
  • the propulsion head has an element for receiving the impact energy of the earth rocket.
  • an element for receiving the impact energy of the earth rocket in the propellant head is advantageous in that the impact energy provided by the rocket is brought into effect very effectively in the propellant head.
  • the element for receiving the impact energy is arranged at the penetrating end of the propellant head.
  • the production of the free space, which serves to retract the geothermal probe tube assembly is particularly fast to produce.
  • the earth rocket can be operated in such a way that the resultant of the force vector introduced into the geothermal probe installation device by the earth rocket points in a direction deviating from the longitudinal axis of the installation device, and thus the installation device is curved during installation , For example, describes hyperbolic or parabolic web. It is thus possible to install several geothermal probes in the ground so that they are far away from each other at their feet, but for example, end up in a common shaft structure, which greatly reduces the technical complexity of the connections and their maintenance. The greatest possible distance between the bases of several geothermal probes is of course preferred under the aspect of the most efficient possible energy generation.
  • geothermal probes from a common shaft structure in the ground in such a way that they are essentially straight, that is to say they are essentially flat.
  • H not curved forward movement in the ground just by starting in a direction oblique to the earth's surface position in the direction you want. Even so, it succeeds without problems to place the bases of geothermal probes far from each other and thus to make their operation effectively.
  • the drawn with the help of Erdettasondeneinbauvortechnisch invention in the produced space geothermal probe can either be a so-called U-probe, in which the tubes for flow and return are arranged approximately parallel to each other.
  • the geothermal probe may be a coaxial probe in which an outer tube and an inner tube approximately coaxially fixed therein are formed.
  • the geothermal probe tubes dragged behind the propellant head can have a special sliding layer (for example, one containing Teflon and / or fluoropolymers and / or silicone-containing compounds, etc.) on the outer surface of the tubes to allow better penetration in the soil.
  • a special sliding layer for example, one containing Teflon and / or fluoropolymers and / or silicone-containing compounds, etc.
  • the ground rocket provided in the geothermal probe installation device can be operated electrically or hydraulically or pneumatically or in a combination of the aforementioned. It is thus possible, depending on the available drive energies to operate the earth rocket accordingly.
  • a Verhelltechnisch is provided, which serves for filling the created by the displacement of the soil free space next to the geothermal probe with a Ver hypothala- material.
  • the backfill is drawn parallel to the geothermal probe tube assembly into the ground.
  • a backfill material such as bentonite
  • the hydraulic or pneumatic line which supplies the Erdrakete with energy, remains after the introduction of geothermal probe in the ground and is used for introducing a suitable material for backfilling the remaining free space.
  • the hydraulic or pneumatic line can be decoupled from the Erdrakete distant effect. In this case, it can then be waived to provide a separate backfill.
  • the thermal connection of the geothermal probe is reached to the surrounding soil.
  • the method for introducing a geothermal probe into the ground using a geothermal probe installation device is characterized in that a Erdettason- deneinbauvorraum of the aforementioned type provided and at the Einbringort, d. H. at the place where the geothermal probe is to be introduced into the ground, is placed.
  • the Erdrakete is operated to introduce the geothermal probe into the ground and created by displacing the soil a free space. Into the free space penetrates the geothermal probe installation device successively until the desired depth of penetration is reached in the ground. It is thus possible to install geothermal probes in all types of soil, only in pending rock, the technique described above is not applicable.
  • geothermal probes The operation of geothermal probes is thereby more effective.
  • the earth rocket can be removed from the space created by displacement of the ground.
  • the propellant head is fixed asymmetrically or eccentrically or at a defined angle to the probe longitudinal axis, so that the probe describes a defined arc during movement through the ground during installation.
  • the unwinding of the probe head to the axis in which the propellant head moves is remote-controlled adjustable and thus the installation is controlled.
  • the path of the earthquake probe can be specified in the ground, so that a particularly favorable installation in the ground can be done.
  • the invention also includes that the propellant head can be located by an integrated active or passive transmitter or transponder or reflector.
  • the means for supplying energy to the earth rocket can be decoupled from the earth rocket when the desired penetration depth in the ground has been reached.
  • the decoupling can be controlled by remote control or, for example, by a certain movement of the means for supplying power to the earth rocket, for example by movement of the tube in the form of a rotary movement.
  • the means for powering the earth rocket if this is a hose, as it is selected in the pneumatic or hydraulic operation of the earth rocket, be used after uncoupling of the earth rocket for filling the remaining free space in the ground.
  • the filling material is pumped through the hose and exits at its end.
  • the filling material is thereby introduced into the remaining free space and distributed there, with the thermal coupling takes place on the wall of the space generated by displacement of the soil free space.
  • the filling material is, for example, bentonite, which due to its low viscosity can completely fill the remaining free space.
  • a device for obtaining or storing geothermal heat with at least one geothermal probe, which is introduced into the ground according to the method described above, is likewise encompassed by the present invention.
  • Fig. 1 shows a cross section through a geothermal probe installation device in a first embodiment of the invention
  • Fig. 2 shows a cross section through a geothermal probe installation device in a second embodiment of the invention.
  • 1 shows a borehole heat exchanger installation device 1 in a cross section, which comprises a geothermal probe 2.
  • the geothermal probe 2 has a tube 2a, which serves as a flow for the geothermal probe. Furthermore, a pipe 2b is provided which represents the return of the geothermal probe.
  • the probe head 2c connects the two tubes 2a and 2b of the geothermal probe. 2
  • the geothermal probe 2 is fixed in the propellant head 3 by means of a fastening means 4 on the probe head 2c.
  • the propellant head 3 has an end 3a, which is designed tapering.
  • Fig. 1 it is shown that the end of the propellant head 3a is designed stepped tapered.
  • the propellant head 3 further has a hull 3b, which is larger in cross-section than the end of the propellant head 3a.
  • the tubes 2a, 2b of the geothermal probe 2 protrude from the fuselage of the propellant head 3 approximately in the axis in which the propellant head penetrates with its pointed end designed into the ground.
  • the geothermal probe mounting device 1 further comprises an earth rocket 5, which is associated with a means for supplying energy to the earth rocket 5a.
  • the means for energizing the Erdrakete 5a is a hose.
  • the propellant head 3 further comprises an element for receiving impact energy 6.
  • the earth rocket 5 transmits its impact energy to the element for receiving impact energy 6.
  • the propellant head 3 with its pointed end can penetrate into the ground and thereby retract the borehole heat exchanger 1 into the free space created by displacement of the ground.
  • FIG. 2 shows a cross section through a borehole heat exchanger installation device 1 in a second embodiment of the invention.
  • a geothermal probe 2 is fixed by means of a fastening means 4 on the probe head 2c.
  • the geothermal probe 2 has a tube 2d, which is used as a feed of the geothermal probe.
  • a tube 2e which is approximately axially fixed in the tube 2d, serves as a return of the geothermal probe.
  • the propellant head 3 is configured as described above under FIG. 1.
  • the earth rocket 5 which has a means 5a for supplying energy to the earth rocket 5, here in the form of a hose, acting on a member for receiving impact energy 6, which is assigned to the propellant head 3 ,
  • the propellant head 3 Under the influence of acting on the element for receiving the impact energy 6 Erdrakete 5, the propellant head 3 can penetrate with its pointed end designed into the ground and thereby collect the geothermal probe 1 in the space created by displacement of the soil free space.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un dispositif de pose d'une sonde géothermique (1) servant à introduire une sonde géothermique (2) dans le sol, comprenant au moins une sonde géothermique (2) équipée d'une tête (2c) qui relie une arrivée (2a, 2d) et un retour (2b, 2e) étanches aux fluides d'un agencement tubulaire de sonde géothermique. Ce dispositif est caractérisé en ce que la tête de sonde (2c) est fixée dans une tête d'avancement (3) à laquelle est associée une fusée de forage (5) de sorte que l'énergie d'impact de cette dernière agisse sur ladite tête d'avancement.
PCT/EP2010/004744 2009-08-06 2010-08-03 Dispositif de pose de sonde géothermique WO2011015342A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009036324.6 2009-08-06
DE102009036324A DE102009036324A1 (de) 2009-08-06 2009-08-06 Erdwärmesondeneinbauvorrichtung

Publications (1)

Publication Number Publication Date
WO2011015342A1 true WO2011015342A1 (fr) 2011-02-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/004744 WO2011015342A1 (fr) 2009-08-06 2010-08-03 Dispositif de pose de sonde géothermique

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DE (1) DE102009036324A1 (fr)
WO (1) WO2011015342A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018125947A1 (de) 2018-10-18 2020-04-23 Marquardt Brunnen & bohren GmbH Verfahren und Vorrichtung zum Rückbau von Erdwärmesonden

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010045126A1 (de) * 2010-09-11 2012-03-15 Rehau Ag + Co. Erdsondenanordnung und Erdsondeneinbauvorrichtung
DE102013007805A1 (de) 2013-05-07 2014-11-13 Daimler Ag Säule für eine Kraftfahrzeug-Rohbaustruktur, Verfahren zur Herstellung einer Säule und Kraftfahrzeug-Rohbaustruktur

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BE879592A (fr) * 1979-10-23 1980-02-15 Carminati Franco Nouveau procede de recuperation et de stockage de calories dans le sous-sol
FR2492043A1 (fr) * 1980-10-15 1982-04-16 Svensson Bruno Installation pour inserer en continu un tube flexible dans le sol d'une maniere sensiblement verticale
DE3114262A1 (de) * 1981-04-09 1982-11-04 Jürgen 7990 Friedrichshafen Koll Erdkollektor von waermepumpen und vorrichtung zu seiner herstellung
EP0323433A1 (fr) * 1987-12-04 1989-07-05 Friedrich Hammer Dispositif pour poser sous le sol des conduites ou similaires
US5161626A (en) * 1990-12-10 1992-11-10 Industrial Engineering, Inc. Method for embedding lines, anchoring cables, and sinking wells
EP0548588A1 (fr) * 1991-12-20 1993-06-30 TERRA AG fuer Tiefbautechnik Dispositif pour réaliser des forages dans le sol
US5758724A (en) * 1995-09-12 1998-06-02 Enlink Geoenergy Services, Inc. Underground heat exchange system
EP1486741A1 (fr) * 2003-06-13 2004-12-15 Tiroler Röhren- und Metallwerke Aktiengesellschaft Pieu pour énergie
GB2436582A (en) * 2006-03-29 2007-10-03 Cementation Found Skanska Ltd Geothermal energy pile / foundation
DE102007009773A1 (de) * 2007-02-27 2008-08-28 Tracto-Technik Gmbh & Co. Kg Verfahren zum Einbringen von Erdwärmesonden in das Erdreich und eine Vorrichtung
DE202007017371U1 (de) * 2007-12-11 2009-04-16 Rehau Ag + Co Erdwärmesonde aus vernetztem Polymermaterial
DE102008006768A1 (de) * 2008-01-30 2009-08-06 Malecha & Nissen Energietechnik Gmbh Vorrichtung und Verfahren zum Einbringen von Erdsonden in Erdreich
WO2010103317A2 (fr) * 2009-03-10 2010-09-16 Mark Brice Taupe à percussion

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DE3010155A1 (de) * 1980-03-17 1981-09-24 Sita Bauelemente Gmbh, 2080 Pinneberg Waermegewinnung mittels als bohrer ausgebildeter waermetauscher-sonde
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Publication number Priority date Publication date Assignee Title
BE879592A (fr) * 1979-10-23 1980-02-15 Carminati Franco Nouveau procede de recuperation et de stockage de calories dans le sous-sol
FR2492043A1 (fr) * 1980-10-15 1982-04-16 Svensson Bruno Installation pour inserer en continu un tube flexible dans le sol d'une maniere sensiblement verticale
DE3114262A1 (de) * 1981-04-09 1982-11-04 Jürgen 7990 Friedrichshafen Koll Erdkollektor von waermepumpen und vorrichtung zu seiner herstellung
EP0323433A1 (fr) * 1987-12-04 1989-07-05 Friedrich Hammer Dispositif pour poser sous le sol des conduites ou similaires
US5161626A (en) * 1990-12-10 1992-11-10 Industrial Engineering, Inc. Method for embedding lines, anchoring cables, and sinking wells
EP0548588A1 (fr) * 1991-12-20 1993-06-30 TERRA AG fuer Tiefbautechnik Dispositif pour réaliser des forages dans le sol
US5758724A (en) * 1995-09-12 1998-06-02 Enlink Geoenergy Services, Inc. Underground heat exchange system
EP1486741A1 (fr) * 2003-06-13 2004-12-15 Tiroler Röhren- und Metallwerke Aktiengesellschaft Pieu pour énergie
GB2436582A (en) * 2006-03-29 2007-10-03 Cementation Found Skanska Ltd Geothermal energy pile / foundation
DE102007009773A1 (de) * 2007-02-27 2008-08-28 Tracto-Technik Gmbh & Co. Kg Verfahren zum Einbringen von Erdwärmesonden in das Erdreich und eine Vorrichtung
DE202007017371U1 (de) * 2007-12-11 2009-04-16 Rehau Ag + Co Erdwärmesonde aus vernetztem Polymermaterial
DE102008006768A1 (de) * 2008-01-30 2009-08-06 Malecha & Nissen Energietechnik Gmbh Vorrichtung und Verfahren zum Einbringen von Erdsonden in Erdreich
WO2010103317A2 (fr) * 2009-03-10 2010-09-16 Mark Brice Taupe à percussion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018125947A1 (de) 2018-10-18 2020-04-23 Marquardt Brunnen & bohren GmbH Verfahren und Vorrichtung zum Rückbau von Erdwärmesonden
WO2020078623A1 (fr) 2018-10-18 2020-04-23 Btr Bohrtechnik Rosswag Gmbh & Co.Kg Procédé et dispositif de démantèlement de sondes géothermiques

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