EP0494408A1 - Procédé et appareil pour élargir un puits de forage - Google Patents

Procédé et appareil pour élargir un puits de forage Download PDF

Info

Publication number
EP0494408A1
EP0494408A1 EP91121614A EP91121614A EP0494408A1 EP 0494408 A1 EP0494408 A1 EP 0494408A1 EP 91121614 A EP91121614 A EP 91121614A EP 91121614 A EP91121614 A EP 91121614A EP 0494408 A1 EP0494408 A1 EP 0494408A1
Authority
EP
European Patent Office
Prior art keywords
cutting
expanding
housing
borehole
head
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.)
Granted
Application number
EP91121614A
Other languages
German (de)
English (en)
Other versions
EP0494408B1 (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

Links

Images

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 a method according to the preamble of claim I and an expansion device, preferably for performing the method, according to the preamble of claim 7.
  • a conical widening head for widening a pilot borehole present in the ground, a conical widening head is connected with its tip to a pipe string laid in the pilot borehole and pulled therefrom through the pilot borehole.
  • liquid is fed to the expander head under high pressure.
  • This has a number of channels running essentially in the direction of movement and transverse to this, which are connected to the inner bore of the pipe rod.
  • At the outer ends of these channels there are nozzles which generate a fine, high-pressure liquid jet which cuts the soil.
  • the conical expansion head is pressed under constant tension and by rotating the pipe rod rotating into the soil divided by the liquid jet, thus expanding the pilot borehole.
  • the expansion process thus consists of a rotating movement and constant, axial pressing of the expansion head into the soil surrounding the pilot borehole.
  • the pipe corresponding to the widened borehole is drawn in at the same time as the widening.
  • pilot borehole can still be created in the case of solid soil or soil interspersed with rock inclusions, since the pilot drilling device was able to bypass rock inclusions laterally, but when expanding these rock inclusions either shifted in the solid soil or parts of should be separated from them. This is not possible with a device of the type described.
  • the pilot drill hole in the soil can only be widened by flushing or cutting and applying a static pull. or pressure force is often not possible because the diameter of the Expanding hole is about 3-4 times the diameter of the pilot hole.
  • the cross-sectional area of the pilot bore is increased by 9 to 16 times the cross-section of the expansion bore and thus the jacket surface accordingly.
  • there is a risk that the large jacket frictional forces acting on the pipe to be pulled in can no longer be overcome due to the surrounding earth.
  • 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 pilot borehole 10 is produced in an operation immediately following the pilot boring process, the widened borehole 9 by connecting, for example, a pipe rod 21 with a displacement pipe to the pilot borehole for the pilot borehole 10 Head, an expander 1 is connected [Fig. 2].
  • the expander is guided in the pilot borehole.
  • a static train of about 5 tons, preferably connected with a damping element, can also be applied.
  • With its cutting and ramming method of operation it expands the pilot borehole.
  • 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 the 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.
  • 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 and can thus be better drilled or widened.
  • a device for carrying out the method according to claim 1 can preferably be a ram expansion device, in the form of a short ram 1, with a striking device 2 for its independent forward movement, which is a cylindrical housing 3 with a front expansion head 4 sitting thereon and one inside the housing 3 has impact body 5 of an impact device 2, the individual associated assemblies being designed as follows.
  • the striking device 2 has a cylindrical housing length of the housing shell, which is shorter than 4 times the housing diameter.
  • This percussion device 2 has a reciprocable in the housing 3 designed as a cylinder, at its rear end hollow cylindrical percussion piston 2.1 as percussion body, 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 the Rammaufweitgeraet 1 runs forward in the soil 7.
  • a device 8 for connecting and pulling pipes into the widened borehole 9 is arranged.
  • 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 that 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 expanding head for the cutting device 13 integrated in the expanding head and a feed line to one or more lubricating nozzles.
  • This first feed line network 11 is connected to this by means of connection to a device upstream of the expansion 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 essentially cylindrical housing is designed as a double-tube housing 3, which is suitably connected to the expansion head 4, preferably welded on, and at the rear end of which is an annular nozzle for the double-tube structure the lubricating fluid contains.
  • the two housing tubes 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 waisted section 3.5 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 with a smaller diameter adjoins this, which for Relief 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 to the housing 3 of the impact device 2, preferably welded, 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 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, a central cutting part 13.3, which is in the area means 15 of the cutting device 13 of its cutting surface 13 for the discharge of cutting fluid under high pressure pointing in suitable directions, which are preferably directed essentially forward, substantially rearward and essentially radially and at the ends of internal conduit channels 13.4, which have 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 automatic 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 conduit 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 15 of the cutting device 13 for exiting cutting fluid under high pressure are nozzle-shaped openings 15.1, which are designed as nozzle insert pieces 15.1.1 and are used at the free end of the internal conduit channels 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 nozzle-shaped openings 15.1 at least partially in the direction of advance of the borehole, ie with a directional component to the front.
  • 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 [1 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 expanding device can be a static pilot drilling device 14 of known design and consists of a pipe string 21, and on the one hand a digesting head 20 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 required static pressure Driving the pilot drill 14 exist in the ground.
  • the expanding device 1 is also connected to the cutting fluid line of the pilot drilling device 14.
  • 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 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 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 14 by means of a pipe screw connection 19. A compression spring 18.6 is clamped between piston 18.1 and cylinder 18.3.
  • connection bores 18.4 are provided in the piston 18.1 for connecting the two cylinder spaces 18.3.1, 18.3.2, which serve as damper bores, by means of which the cutting fluid contained in the cylinder 18.3 passes through each time the ram is struck Autweitgeraetes 1 from one cylinder chamber is pressed into the other cylinder chamber while damping the blow from the expansion unit.
  • a constant pull is exerted on the piston rod 18.2 by the pilot drilling device 14, 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 transmitted to the pilot drilling device 14 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 tip 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 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 14, from which the cutting fluid is also supplied.
  • a housing is provided in a third 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 automatic unit.
  • 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 14, from which the cutting fluid is also supplied.
  • the ramming and cutting expansion device drives into an existing pilot borehole 10 and thereby expands the earth compared to the pilot borehole due to its larger diameter due to its larger diameter.
  • the ramming expansion device which is connected to a pilot drilling device 14 at its tip by means of a damping element 18, drives itself into a pilot drilling hole 10 between two construction pits.
  • the pipe to be pulled in can be connected to the ramming widening device, it is not only pulled in in the same operation as the widening, but it can also be pulled in more easily, and thus also over a longer length, than with the known methods due to the jerky movements. in particular with the expansion methods using static pull.
  • This summary of one operation even over larger areas, saves a great deal of working time and also equipment and operating personnel. As a result, a pipe can be drawn in much more cheaply than hitherto with the known methods and known devices.
  • 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 construction 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 expansion device 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 cutting nozzles etc., is caused by the compressed air Supply device of the expander is operated like a one-direction earth ram with a cadence that can be determined by the control geometry of the control device belonging to the striking 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 from the cutting device of the cutting device under extremely high pressure and cut it up with it. This also allows rock inclusions to be cut and subsequently smashed by the striking movement of the ramming.
  • a supply device the supply device for the pilot drilling device or the supply device of the expanding device itself

Landscapes

  • 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)
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 true EP0494408A1 (fr) 1992-07-15
EP0494408B1 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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027067A1 (fr) * 1995-03-02 1996-09-06 Siegfried Schwert Procede de mise en place d'un tuyau dans le sol
EP0955444A3 (fr) * 1998-05-07 2002-09-25 FlowTex Technologie GmbH & Co. KG Procédé et dispositif pour l'installation d'un branchement domestique au moyen d'un forage dirigé
GB2597777A (en) * 2020-08-05 2022-02-09 Anthony Brice Mark Impact Mole
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

Families Citing this family (15)

* 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
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
FI990589A (fi) * 1999-03-16 2000-09-17 Rd Trenchless Ltd Oy Menetelmä ja laitteisto maanalaiseen poraukseen
AU2002235745A1 (en) * 2000-12-02 2002-06-11 Tracto-Technik Gmbh Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium
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
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272905A2 (fr) * 1986-12-24 1988-06-29 Flowmole Corporation Dispositif de buse pour l'élargissement d'un passage souterrain
EP0350806A2 (fr) * 1988-07-14 1990-01-17 Hans Brochier GmbH & Co Marteau de déplacement du sol
DE3910515A1 (de) * 1989-04-01 1990-10-04 Tracto Technik Selbstantreibbare rammbohrvorrichtung, insbesondere zur herstellung von rohrfoermigen erdbohrungen

Family Cites Families (9)

* 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
US3151687A (en) * 1959-05-25 1964-10-06 Nippon Sharyo Seizo Kk Driving head with plural impact motors
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
US4749050A (en) * 1987-02-13 1988-06-07 Ritter Lester L Impact tool for tunneling
DE3826513A1 (de) * 1988-08-04 1990-02-08 Schmidt Paul Verfahren und rammbohrgeraet zum grabenlosen verlegen von versorgungsleitungen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272905A2 (fr) * 1986-12-24 1988-06-29 Flowmole Corporation Dispositif de buse pour l'élargissement d'un passage souterrain
EP0350806A2 (fr) * 1988-07-14 1990-01-17 Hans Brochier GmbH & Co Marteau de déplacement du sol
DE3910515A1 (de) * 1989-04-01 1990-10-04 Tracto Technik Selbstantreibbare rammbohrvorrichtung, insbesondere zur herstellung von rohrfoermigen erdbohrungen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027067A1 (fr) * 1995-03-02 1996-09-06 Siegfried Schwert Procede de mise en place d'un tuyau dans le sol
EP0955444A3 (fr) * 1998-05-07 2002-09-25 FlowTex Technologie GmbH & Co. KG Procédé et dispositif pour l'installation d'un branchement domestique au moyen d'un forage dirigé
GB2597777A (en) * 2020-08-05 2022-02-09 Anthony Brice Mark Impact Mole
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

Also Published As

Publication number Publication date
EP0494408B1 (fr) 1996-03-27
US5301758A (en) 1994-04-12
CH683016A5 (de) 1993-12-31
DE59107622D1 (de) 1996-05-02

Similar Documents

Publication Publication Date Title
EP0494408B1 (fr) Procédé et appareil pour élargir un puits de forage
EP0216100B1 (fr) Mouton de forage avec outil de coupe percutant actionné par piston
EP0434924B1 (fr) Dispositif pour forer un puits adjacent ou dévié à partir d'un puits, notamment d'un puits tubé
DE60314160T2 (de) Verfahren und vorrichtung zum austausch von unterirdischen rohren
EP1769131B1 (fr) Tete de forage d'un engin a forer le sol
DE2157259B1 (de) Rammbohrgerät
DE3710162C1 (de) Rammbohrgeraet mit beweglichem Meissel
DE2343079C2 (de) Vorrichtung zum im wesentlichen horizontalen Durchbohren eines Dammes o.dgl.
EP0953723B1 (fr) Dispositif d'élargissement
EP0548588B1 (fr) Dispositif pour réaliser des forages dans le sol
DE602004012884T2 (de) Verfahren und vorrichtung zum installieren eines selbstbohrenden expandierenden gebirgsankers und selbstbohrender gebirgsanker
EP0578034A1 (fr) Procédé et dispositif pour le forage d'un trou dans le sol
EP2447462A1 (fr) Procédé d'introduction souterraine d'une conduite
CH704416A2 (de) Bohranlage zum Durchführen von Bohrungen im Erdreich.
EP1157787B1 (fr) Procédé pour travailler le sol et des pierres et outil de percussion hydraulique
DE102015107194A1 (de) Bohranlage zum Erzeugen oder Aufweiten einer Erdbohrung im Erdreich und Verfahren zur Steuerung eines Vorschubantriebs einer solchen Bohranlage
DE19725052C2 (de) Bohrgerät
DE3029963C2 (de) Bohrdüse
DE19946587A1 (de) Vorrichtung zum Richtungsbohren
DE3129722C2 (de) Verfahren zum grabenlosen Verlegen von Rohrleitungen
DE2807121B2 (de) Verfahren und Vorrichtung zur Hochdruck-Strömungsmittel-Reinigung von Strömungswegen in Rohren
DE3622934C2 (de) Bohrgerät kompakter Bauweise
DE1634365C3 (fr)
DE10145603B4 (de) Vorrichtung und Verfahren zum Kanalaufweiten oder -zerstören
EP3865655A1 (fr) Dispositif de production d'un trou de forage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19930115

17Q First examination report despatched

Effective date: 19940321

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 59107622

Country of ref document: DE

Date of ref document: 19960502

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960502

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20001221

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20001228

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010131

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011217

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020702

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20011217

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020830

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST