EP0494408B1 - Procédé et appareil pour élargir un puits de forage - Google Patents

Procédé et appareil pour élargir un puits de forage Download PDF

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Publication number
EP0494408B1
EP0494408B1 EP91121614A EP91121614A EP0494408B1 EP 0494408 B1 EP0494408 B1 EP 0494408B1 EP 91121614 A EP91121614 A EP 91121614A EP 91121614 A EP91121614 A EP 91121614A EP 0494408 B1 EP0494408 B1 EP 0494408B1
Authority
EP
European Patent Office
Prior art keywords
expanding
expanding apparatus
head
pilot
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91121614A
Other languages
German (de)
English (en)
Other versions
EP0494408A1 (fr
Inventor
Dietmar Dipl.-Wi-Ing. Jenne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terra AG fuer Tiefbautechnik
Original Assignee
Terra AG fuer Tiefbautechnik
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 Terra AG fuer Tiefbautechnik filed Critical Terra AG fuer Tiefbautechnik
Publication of EP0494408A1 publication Critical patent/EP0494408A1/fr
Application granted granted Critical
Publication of EP0494408B1 publication Critical patent/EP0494408B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring
    • E21B7/30—Enlarging drilled holes, e.g. by counterboring without earth removal
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • E21B4/145—Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole
    • 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
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets

Definitions

  • the invention relates to an expanding device for expanding a pilot borehole according to the preamble of claim 1.
  • a device is known for example from EP-A-350 806.
  • a device for expanding an existing pilot borehole which can be connected at the tip of its conical expansion head to a pipe string laid in the pilot borehole and pulled by it through the pilot borehole. Liquid is fed to the expander head under high pressure through the pipe string.
  • This has a number of channels which are connected to the inner bore of the pipe string. At the radially outward-pointing ends of these channels, nozzles are formed, which generate a fine, high-pressure liquid jet for cutting the soil.
  • the conical expansion head is pressed into the soil divided by the liquid jet while simultaneously rotating the pipe string, so that the pilot borehole is widened.
  • the pipe corresponding to the widened borehole is drawn in at the same time as it is widened.
  • the invention has for its object to provide an expansion device of the generic type, with which the expansion of the pilot hole can also be carried out in dense soil or soil with rock inclusions and which has good maneuverability in curves.
  • a pilot borehole 10 present in the soil 7 between two construction pits B is widened by driving an expanding device 1 into the pilot borehole from one side of the pilot borehole 10 [Fig . 1].
  • the widened borehole 9 is produced in an operation immediately following the pilot boring process, in that an expanding device 1 is attached to the pilot boring device for the pilot borehole 10, for example a pipe string 21 with a displacement head is connected [Fig. 2].
  • an expanding device 1 is attached to the pilot boring device for the pilot borehole 10, for example a pipe string 21 with a displacement head is connected [Fig. 2].
  • the expander is guided in the pilot borehole.
  • a static tension can also be applied to the expansion device of approximately 5 tons, preferably connected with a damping element.
  • Such a pilot borehole 10 can have a diameter of 40-50 mm, for example, and the expanded borehole can have a diameter of 160-200 mm.
  • the pilot drilling device can also supply the expanding device with cutting fluid.
  • pilot borehole 10 is widened by striking and cutting action and displacing the soil 7.
  • High-pressure cutting fluid is used to cut the soil. With these methods, part of the cutting fluid supplied to cut the soil can be used to reduce the friction between the borehole wall and the pipe to be drawn in.
  • cutting fluid is pressed in a manner known per se under high pressure by jetting a cutting device into the soil to be drilled or widened, as a result of which it is divided up and can thus be better drilled or widened.
  • a device for carrying out the method explained above is an expanding device in the form of a short ram 1 with a striking device 2 for its independent forward movement.
  • the expander has a cylindrical housing 3 with a front expander head 4 seated thereon and an impact body 5 of the impact device 2, which strikes on the front side inside the housing 3, the individual, associated assemblies being designed as follows.
  • the cylindrical housing shell is shorter than 4 times the housing diameter.
  • the percussion device 2 has a reciprocating piston 2.1, which is hollow-cylindrical at its rear end, in the housing 3, which is designed as a cylinder, and which is pressurized with compressed air and has control openings 2.2 at its rear end. Its back and forth movement is controlled by a control device 6 with control edges 6.1, which partially projects into the percussion piston 2.1 and which cooperate with the control openings 2.2 arranged in the percussion piston 2.1, in such a way that the percussion piston 2.1 hits the front area 1.1 of the Rammaufweitgeraetes 1 hits and thereby drives the ramming device 1 forward in the soil 7.
  • a device 8 for connecting and pulling pipes into the widened borehole 9.
  • the housing 3 is closed with a housing cover 3.7 at its rear end, this housing cover 3.7 having exhaust air openings 3.8 and carrying the control device 6 and lines of the second supply line network for the compressed air [FIG. 6].
  • supply lines are provided in the housing wall as a first feed line network 11 for a cutting fluid which is fed to a cutting device [13], this connecting to the cutting device 13 on the one hand and on the other hand to a supply device outside the Borehole, which also supplies the compressed air for the impact device 2, is set up.
  • a second feed line network 12 is provided for connection to the control device 6 on the one hand and the compressed air lines of the supply device on the other hand. [Fig. 3].
  • a first feed line network 11 for a cutting fluid is not provided in the housing itself, but only in the expansion head for the cutting device 13 integrated in the expansion head and a feed line to one or more lubricating nozzles.
  • This first feed line network 11 is provided with means for connection to a device upstream of the expander head 4, for example a pilot drilling device or a cutting device 13.
  • a second feed line network 12 is provided for connection to the control device 6 on the one hand and the compressed air lines of the supply device of the expander on the other and is arranged in the rear part of the expander [Fig. 4].
  • the substantially cylindrical housing is designed as a double-tube housing 3, which is suitably connected to the expansion head 4, preferably welded on, and is at its rear end by the double-tube structure Ring nozzle for the lubricating fluid contains.
  • the two housing pipes 3.1, 3.2 are supported at suitable points with spacers 3.3 [Fig. 5].
  • the housing is designed as a cylindrical housing 3 [Fig. 6].
  • the essentially cylindrical housing is designed as a waisted housing 3, in which guiding rims 3.4 are arranged on both housing ends and a section 3.5 of smaller diameter is provided between them to facilitate cornering [Fig. 7].
  • the essentially cylindrical housing is designed as a stepped housing 3, in which a guide wedge 3.4 is arranged at the front end of the housing and then a region 3.6 of the housing, which is smaller in diameter and connects to this, connects to it Facilitation of cornering is provided [Fig. 8th].
  • the expanding head 4 is for receiving a part of the impact device 2 as a hollow head 4.1 educated. It is firmly connected, preferably welded, to the housing 3 of the impact device 2, the connection point or the weld seam being located behind an impact point 4.2 of the impact body 5 arranged on the end face. When this part of the striking device 2 is received, the striking piston 2.1 of the striking device 2 protrudes temporarily or permanently with part of its length into the hollow head [FIG. 4, 5].
  • the cutting device 13 is arranged in a first variant in front of the expansion head 4 and connected to it, preferably screwed.
  • This cutting device 13 has between a front and a rear connection device 13.1 or 13.2, preferably corresponding parts of pipe fittings 13.1.1, 13.2.1, in particular union nut pipe fittings 13.1.1, 13.2.1, and a central cutting part 13.3, which in the Has region of its surface in suitable directions nozzles 15.1 of the cutting device 13 for the discharge of cutting fluid under high pressure, which are preferably directed substantially forward, substantially rearward and essentially radially and are located at the ends of internal conduits 13.4 which are connected to a central feed channel 13.5 are connected.
  • the central feed channel 13.5 is connected by means of the pipe fittings 13.1.1, 3.2.1 to external cutting fluid circuits, for example a pilot drilling device 14 or the expansion device 1.
  • the expanding device can also be connected to the pilot drilling device 14 by means of the cutting device 13 [FIG. 10].
  • the cutting device 13 can be arranged integrated in the expansion head 4.
  • the internal line channels 13.4 are provided for forwarding the cutting fluid to means for exiting cutting fluid under high pressure in the expansion head 4, these fluid lines being connected to corresponding lines of a feed line network of the cylindrical housing 3 [Fig. 4, 5].
  • the means of the cutting device 13 for the discharge of cutting fluid under high pressure are nozzle-shaped openings 15.1, which are designed as nozzle insert pieces 15.1.1 and are inserted at the free end of the internal duct 13.4 of the cutting device 13.
  • the nozzle insert pieces 15.1.1 are preferably made of industrial gemstones.
  • the axis direction points at least a part of the jet-shaped openings 15.1 at least partially in the direction of advance of the borehole, ie with a directional component to the front and some of the nozzle-shaped openings 15.1 at least partially opposite to the direction of advance of the borehole, ie with a directional component to the rear.
  • the lubricating fluid is part of the cutting fluid and is supplied from the first feed line network 11 through a lubrication line 17 connecting the lubricating nozzles 16 to the first feed line network.
  • This lubricating nozzle 16 can also be designed as a ring nozzle and extend practically over the entire circumference of the rear end of the housing [Fig. 5].
  • the expansion device can be a static pilot drilling device of known design and consists of a pipe string 21 and, on the one hand, a digging head connected to it with integrated high-pressure cutting nozzles and, on the other hand, a connected supply and pressure device [not shown] for applying the necessary static pressure for driving the pilot forward -Drilling tools exist in the ground.
  • the expansion device 1 is also connected to the cutting fluid line of the pilot drilling device.
  • the damping element 18 is preferably a hydraulically acting damping element. It is necessary if the expansion device is connected to a pilot drilling device in the retreat and consists of a cylinder 18.3 which can be connected to the expansion device 1, for example with a pipe screw connection 19 and which contains a piston 18.1 inside, which, like its piston rod 18.2, has a central bore 18.5. The piston rod can also be connected to a pilot drilling device by means of a pipe screw connection 19. A compression spring 18.6 is clamped between piston 18.1 and cylinder 18.3.
  • 18.1 connecting bores are provided in the piston for connecting the two cylinder spaces 18.3.1, 18.3.2, which serve as damper bores by using the cutting fluid contained in the cylinder 18.3 with each impact of the ramming Expander 1 is pressed from one cylinder chamber while damping the impact of the expander in the other cylinder chamber.
  • a constant pull is exerted on the piston rod 18.2 by the pilot drilling device, which is in its retraction phase from the pilot bore 10.
  • Such a damping element is required so that the strikes of the short rams are as far as possible not transferred to the pilot drilling machine and this is prevented from being destroyed [Fig. 9].
  • a housing is provided in a first variant of the inner structure, which contains a striking device 2 as described above, which is connected with its second line network to the compressed air lines of the supply device of the expanding device 1.
  • the top of the expander 1 is connected to a cutting device 13, the supply of cutting fluid from the supply device of the expander 1 through the housing.
  • a housing is provided in a second variant of the inner structure, which contains an impact device 2 as described above, which is connected with its second line network to the compressed air lines of the supply device of the expansion device.
  • the first line network of the casing is connected via the head tip of the expander 1 to a damping element 18 and this to a pilot drill pipe of a pilot drill device, from which the cutting fluid is also supplied.
  • a housing is provided in a third variant of the inner structure, which contains an impact device 2 as described above, which is connected with its second line network to the compressed air lines of the supply device of the expander.
  • the first line network of the housing is connected via the head tip of the expander 1 to a damping element 18 and this to a pilot drill pipe of a pilot drill device, from which the cutting fluid is also supplied.
  • the ramming and cutting expansion device drives into an existing pilot borehole 10 and, as a result of its larger diameter compared to the pilot borehole, expands it, thereby displacing the soil.
  • the ramming expansion device which is connected to a pilot drilling device at its tip by means of a damping element 18, drives itself into a pilot drilling hole 10 between two construction pits.
  • the pilot drilling device which is withdrawn from the pilot borehole 10, pulls on the expander 1 additionally with a pull of approx. 5 tons. Due to its larger diameter compared to the pilot borehole 10, the latter is expanded.
  • the expansion device in the form of short rams can also follow the bores of the pilot hole without any problems due to its short design compared to normal ram boring machines. Due to its striking mode of operation, it is also able to smash larger rock inclusions which are adjacent to the pilot borehole To hit side. Particularly in the versions with the waisted or offset housing, there is particularly good cornering ability even for smaller radii.
  • the cutting and ramming expander in each of the variants with an integrated cutting device, with a cutting device in front, with the supply only from behind, the supply from behind and from the front, with a ring nozzle as a lubricating nozzle, with individual lubricating nozzles etc., is caused by the compressed air Supply device of the expander is operated like a one-way earth ram with a cadence that can be determined by the control geometry of the control device belonging to the impact device.
  • a cutting fluid is supplied to the expanding device by a supply device [the supply device for the pilot drilling device or the supply device of the expanding device itself] which is dependent on the respective process variant and is pressed into the soil under extremely high pressure from the cutting nozzles of the cutting device and cut it up with it.
  • a supply device the supply device for the pilot drilling device or the supply device of the expanding device itself
  • This also allows rock inclusions to be cut and subsequently crushed by the striking movement of the ramming.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Claims (9)

  1. Appareil d'élargissement d'un trou foré pilote (10), comprenant un corps cylindrique (3) dont la longueur est inférieure à quatre fois le diamètre de celui-ci, une tête élargisseuse avant (4) pourvue d'un dispositif de coupe (13), un dispositif de percussion (2) pour l'avancement automatique de l'appareil d'élargissement (1) dans le sol, pourvu d'un corps de percussion (5) percutant frontalement à l'intérieur du corps (3), et un dispositif (8) pour le raccordement d'un tuyau (R) à introduire dans le trou foré élargi (9), la tête élargisseuse (4) étant creuse pour recevoir au moins temporairement le corps de percussion (8), caractérisé en ce que le dispositif de coupe (13) a pour la sortie de liquide de coupe à haute pression des ouvertures en forme de buse (15.1) qui sont faites dans la zone de la tête élargisseuse (4) à l'extrémité libre de conduits internes (13.4) et présentent trois directions d'axe différentes, la direction d'axe d'une première partie des buses (15.1) étant sensiblement parallèle à la direction longitudinale du corps, la direction d'axe d'une deuxième partie des buses (15.1) étant sensiblement perpendiculaire à la direction longitudinale du corps et la direction d'axe d'une troisième partie des buses (15.1) étant sensiblement perpendiculaire à la paroi de la tête élargisseuse (4).
  2. Appareil d'élargissement selon la revendication 1, caractérisé en ce que le dispositif de coupe (13) est placé devant la tête élargisseuse (4) et est joint à celle-ci.
  3. Appareil d'élargissement selon la revendication 1, caractérisé en ce que le dispositif de coupe (13) est intégré dans la tête élargisseuse (4).
  4. Appareil d'élargissement selon l'une des revendications 1 à 3, caractérisé en ce que la tête élargisseuse (4) est soudée au corps (3), le cordon de soudure étant fait derrière un endroit de percussion frontal (4.2) du corps de percussion (5).
  5. Appareil d'élargissement selon l'une des revendications 1 à 4, caractérisé en ce que la tête élargisseuse (4) présente à son extrémité libre des moyens de raccordement à d'autres appareils, en particulier des conduites à haute pression pour le liquide de coupe.
  6. Appareil d'élargissement selon l'une des revendications 1 à 5, caractérisé en ce qu'à l'extrémité arrière de l'appareil d'élargissement (1) est prévue au moins une buse de lubrification (16) pour la sortie de liquide de coupe vers le côté de la surface latérale extérieure du tuyau (R) introduit par l'appareil d'élargissement (1).
  7. Appareil d'élargissement selon l'une des revendications 1 à 6, caractérisé en ce que le corps (3), sensiblement cylindrique, a des couronnes de guidage (3.4) faites à ses deux extrémités et une partie de plus petit diamètre (3.5) située entre ces couronnes et destinée à faciliter le mouvement en courbe de l'appareil d'élargissement.
  8. Appareil d'élargissement selon l'une des revendications 1 à 7, caractérisé en ce qu'il peut être joint à un appareil de forage pilote (14), entre les deux étant placé un élément amortisseur (18).
  9. Appareil d'élargissement selon la revendication 8, caractérisé en ce que des conduites d'alimentation de l'appareil de forage pilote (14) peuvent être raccordées à l'appareil d'élargissement (1).
EP91121614A 1990-12-24 1991-12-17 Procédé et appareil pour élargir un puits de forage Expired - Lifetime EP0494408B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4077/90A CH683016A5 (de) 1990-12-24 1990-12-24 Verfahren zum Aufweiten eines Bohrloches und Aufweitgerät.
CH4077/90 1990-12-24

Publications (2)

Publication Number Publication Date
EP0494408A1 EP0494408A1 (fr) 1992-07-15
EP0494408B1 true EP0494408B1 (fr) 1996-03-27

Family

ID=4269398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121614A Expired - Lifetime EP0494408B1 (fr) 1990-12-24 1991-12-17 Procédé et appareil pour élargir un puits de forage

Country Status (4)

Country Link
US (1) US5301758A (fr)
EP (1) EP0494408B1 (fr)
CH (1) CH683016A5 (fr)
DE (1) DE59107622D1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313221C2 (de) * 1993-04-22 1995-08-17 Flowtex Service Ges Fuer Horiz Verfahren zum Verlegen von unterirdischen Sammelleitungen für Flüssigkeiten und Gase, insbesondere zum Bau von Horizontalfilterbrunnen und Drainageleitungen, und Arbeitsmittel zur Durchführung des Verfahrens
DE4433533C1 (de) * 1994-09-20 1995-11-23 Terra Ag Tiefbautechnik Rammbohrvorrichtung
DE19508703A1 (de) * 1995-03-02 1996-09-05 Siegfried Schwert Verfahren zum Einbringen eines Rohres in das Erdreich
US5687805A (en) * 1996-04-29 1997-11-18 Perry; Robert G. Back reamer apparatus
US5811741A (en) * 1997-03-19 1998-09-22 Coast Machinery, Inc. Apparatus for placing geophones beneath the surface of the earth
US5944117A (en) * 1997-05-07 1999-08-31 Eastern Driller's Manufacturing Co., Inc. Fluid actuated impact tool
DE19725052C2 (de) * 1997-06-13 1999-10-28 Tracto Technik Bohrgerät
DE19820483C1 (de) * 1998-05-07 2000-04-27 Flowtex Technologie Gmbh & Co Verfahren und Vorrichtung zur Erstellung gesteuerter Hausanschlüsse
FI990589A (fi) * 1999-03-16 2000-09-17 Rd Trenchless Ltd Oy Menetelmä ja laitteisto maanalaiseen poraukseen
US7093671B2 (en) * 2000-12-02 2006-08-22 Tracto-Technik Gmbh Pneumatic rock-boring device and method for starting such a device
US7156189B1 (en) * 2004-12-01 2007-01-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Self mountable and extractable ultrasonic/sonic anchor
US8910727B2 (en) * 2006-02-03 2014-12-16 California Institute Of Technology Ultrasonic/sonic jackhammer
US8544566B2 (en) 2010-06-15 2013-10-01 Eastern Drillers Manufacturing, Inc. Fluid actuated impact tool with solid piston-standard bit arrangement and water seal
US9453372B2 (en) 2014-02-12 2016-09-27 Eastern Driller Manufacturing Co., Inc. Drill with integrally formed bent sub and sonde housing
US10240314B2 (en) * 2017-06-16 2019-03-26 William Eugene Hodge Apparatus and method to enhance the utility of hydrodynamic compaction machine
US10519763B2 (en) 2017-09-08 2019-12-31 Eastern Driller Manufacturing Co., Inc. Sonde housing having side accessible sonde compartment
GB2597777A (en) * 2020-08-05 2022-02-09 Anthony Brice Mark Impact Mole
CN113703036B (zh) * 2021-08-31 2024-05-28 宁波瑞能环境能源技术有限公司 用于声学相控阵测地下管道位置的管道发声装置及方法
EP4368809A1 (fr) * 2022-11-10 2024-05-15 LMR Drilling GmbH Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1005770A (en) * 1909-11-18 1911-10-10 Amasa B Clark Apparatus for sinking tubular piles.
US2740612A (en) * 1954-02-23 1956-04-03 Phipps Orville Two-arm rotary drill bit
GB946451A (en) * 1959-05-25 1964-01-15 Nippon Sharyo Seizo Kk Improvements in methods of and apparatus for digging deep holes in the ground
SU545726A1 (ru) * 1967-11-20 1977-02-05 Институт Горного Дела Со Ан Ссср Устройство дл расширени скважин в грунте
AT321206B (de) * 1972-10-02 1975-03-25 Boehler & Co Ag Geb Bohrverfahren und Vorrichtung zu seiner Durchführung
DE2824915C2 (de) * 1978-06-07 1985-01-10 Paul 5940 Lennestadt Schmidt Verfahren zum Herstellen von beiderseits offenen Erdbohrungen
DE3326246A1 (de) * 1983-07-21 1985-01-31 Paul 5940 Lennestadt Schmidt Rammvorrichtung
US4754526A (en) * 1986-12-24 1988-07-05 Flowmole Corporation System including a multi-stepped nozzle assembly for back-boring an inground passageway
US4749050A (en) * 1987-02-13 1988-06-07 Ritter Lester L Impact tool for tunneling
DE3823900C1 (fr) * 1988-07-14 1989-02-16 Hans Brochier Gmbh & Co, 8500 Nuernberg, De
DE3826513A1 (de) * 1988-08-04 1990-02-08 Schmidt Paul Verfahren und rammbohrgeraet zum grabenlosen verlegen von versorgungsleitungen
DE3910515A1 (de) * 1989-04-01 1990-10-04 Tracto Technik Selbstantreibbare rammbohrvorrichtung, insbesondere zur herstellung von rohrfoermigen erdbohrungen

Also Published As

Publication number Publication date
US5301758A (en) 1994-04-12
EP0494408A1 (fr) 1992-07-15
DE59107622D1 (de) 1996-05-02
CH683016A5 (de) 1993-12-31

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