EP1332269B1 - Device for producing a peripheral hole - Google Patents
Device for producing a peripheral hole Download PDFInfo
- Publication number
- EP1332269B1 EP1332269B1 EP01988814A EP01988814A EP1332269B1 EP 1332269 B1 EP1332269 B1 EP 1332269B1 EP 01988814 A EP01988814 A EP 01988814A EP 01988814 A EP01988814 A EP 01988814A EP 1332269 B1 EP1332269 B1 EP 1332269B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boring
- line
- boring device
- old
- old line
- 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
Links
- 230000002093 peripheral effect Effects 0.000 title claims 3
- 238000000034 method Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000003892 spreading Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 22
- 238000011010 flushing procedure Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000001404 mediated effect Effects 0.000 description 2
- 238000006798 ring closing metathesis reaction Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Definitions
- the invention relates to a device for generating a circumferential bore on a laid in the ground line using a Erdbohrwerkmaschines and takes the priority of German Patent Application 100 53 567.4, to which reference is made.
- a tubular drilling tool with a drive is known, which is placed on the Altteitung and - wegbedorfd means of the drive on the line - rinsed with the aid of front side flushing an annular space around the old line.
- the drive provided in the drilling tool is replaced by a rod-mediated hydraulic drive, as described in DE 195 04 484 C1.
- the known from DE 195 22 579 C1 device uses a drive-over head, the old line separates, passes over and covers the old pipe with a cladding tube. The conically shaped override head displaces the earth surrounding the old pipe during propulsion and thereby forms a cavity for the hull or new pipe.
- the devices described surround the old line annular. This leads to the fact that not only a great deal of effort is needed in the propulsion, but obstacles either not at all or can be overcome only with considerable difficulty. Such obstacles can occur in particular in the form of sleeves, thickenings or repairs on the pipe, but also be formed by pipe branches or pipe bends. In practice, for example, a pipe socket, if it exceeds the pipe outside diameter by more than the inside diameter of the tubular drilling tool, stops the drilling operation.
- the invention is an object of the invention to provide a device that allows a simple clearance of the laid in the ground line.
- the invention is also the object of providing a suitable method available.
- the old pipe is gripped with a drilling tool in the form of an open cuff or a curved blade to more than 50%, advantageously 60%.
- the drilling tool has a helical configuration, which is particularly suitable for driving over sleeves and branches.
- the device according to the invention can have outlet nozzles for a rinsing liquid, which can be aligned so that an annular rinsing space is created.
- the nozzles can form a fan-shaped nozzle ring, which leads to a complete flushing of the old pipe despite the lack of ring closure of the drilling tool.
- the drilling tool on a cutting surface, with the obstacles, such as branches, can be separated.
- the device may have a control surface, can be specifically approached with the obstacles and optionally separated with repetition of the process.
- the particular geometry of the device according to the invention makes it possible to avoid obstacles without difficulty and forcibly follow the course of the old pipe in a preferred embodiment, so that even curvature sections of the pipe are reliably overcome without the drilling tool leaving the pipe route.
- the invention is particularly suitable for the replacement of long pipe sections, as they are now cleared for the first time without hindrance can.
- the device according to the invention is suitable for the replacement of old pipes of any material and allows to easily feed new pipes of the same or larger diameter into the earth channel.
- the device according to the invention has a drilling tool 1 with nozzles 2 and a control surface 3. Due to the geometric configuration of the drilling tool shown in Fig. 1, this has a trough-shaped inner surface 6, which bears against the outer Alt effets- or pipe circumference.
- the voltage applied to the outer surface of the pipe guide surface is formed by the inner surface 6 of the helically shaped drill head 1.
- the drilling tool has at the end a cutting edge 8, with the obstacles can be removed from the outer jacket of the pipe.
- the open design of the drilling tool also makes it possible to avoid obstacles.
- the nozzles 2 are preferably high-pressure nozzles with which a water jet, a bentonite suspension or another flushing medium is introduced into the annular space.
- the nozzles are arranged in a ring on the front side of the drilling tool 1 and aligned so that the old pipe is completely washed around (Fig. 3).
- the drilling tool is connected to a push rod and placed in a starting pit on the exposed there old pipe. Thereafter, the tool 1 is driven by using the flushing nozzles 2 along the pipe by means of a (not shown) thrust drive and the tube completely washed around with the aid of the flushing medium.
- a (not shown) thrust drive When hitting a Hindemis this is either bypassed by targeted rod-mediated rotation of the drilling tool or destructively overcome in one or more steps by applying the required thrust. After clearing the old pipe, it can easily be removed from the ground and replaced with a new pipe.
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)
- Excavating Of Shafts Or Tunnels (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Erzeugen einer Umfangsbohrung an einer im Erdreich verlegten Leitung mit Hilfe eines Erdbohrwerkzeugs und nimmt die Priorität der deutschen Patentanmeldung 100 53 567.4 in Anspruch, auf die inhaltlich Bezug genommen wird.The invention relates to a device for generating a circumferential bore on a laid in the ground line using a Erdbohrwerkzeugs and takes the priority of German Patent Application 100 53 567.4, to which reference is made.
Beim grabenlosen Erdbohren zum Ersetzen erdverlegter Leitungen ist es bekannt, die Leitung zu zerstören und in das seitliche Erdreich zu verdrängen oder die Altleitung aus dem Erdreich herauszuziehen. In beiden Fällen wird in dem bestehenden Erdkanal dann eine neue Leitung oder ein neues Rohr eingezogen. Zur Vereinfachung des Ersetzens der Altleitung als auch des Einziehens der Neuleitung, insbesondere einer Neuleitung mit vergrößertem Querschnitt ist es bekannt, zunächst das die Altleitung umgebende Erdreich zu entfernen und so einen Ringkanal um die Altleitung auszubilden.In trenchless earth drilling for replacing buried pipelines, it is known to destroy the line and to displace into the lateral soil or to pull the old line from the ground. In both cases, a new pipe or a new pipe is then retracted in the existing earth channel. To simplify the replacement of the old line as well as the retraction of the new line, especially a new line with an enlarged cross-section, it is first known to remove the soil surrounding the old pipe and thus form an annular channel around the old line.
In der DE 33 31 291 C2 ist ein rohrförmiges Bohrwerkzeug mit einem Antrieb bekannt, welches auf die Altteitung aufgesetzt wird und - sich mittels des Antriebs auf der Leitung fortbewegend - mit Hilfe von stirnseitig angeordneten Spüldüsen einen Ringraum um die Altleitung freispült. Ein ähnliches Gerät ist in der DE 32 28 637 C2 beschrieben. In einer Weiterentwicklung dieser bekannten Geräte wird der im Bohrwerkzeug vorgesehene Antrieb durch einen gestängevermittelten Hydraulikantrieb, wie in der DE 195 04 484 C1 beschrieben, ersetzt. Die aus der DE 195 22 579 C1 bekannte Vorrichtung bedient sich eines Überfahrkopfes, der die Altleitung auftrennt, überfährt und das Altrohr mit einem Hüllrohr überzieht. Der konisch ausgebildete Überfahrkopf verdrängt während des Vortriebs das das Altrohr umgebende Erdreich und bildet dadurch einen Hohlraum für das Hüll- bzw. Neurohr.In DE 33 31 291 C2, a tubular drilling tool with a drive is known, which is placed on the Altteitung and - wegbewegend means of the drive on the line - rinsed with the aid of front side flushing an annular space around the old line. A similar device is described in DE 32 28 637 C2. In a further development of these known devices, the drive provided in the drilling tool is replaced by a rod-mediated hydraulic drive, as described in DE 195 04 484 C1. The known from DE 195 22 579 C1 device uses a drive-over head, the old line separates, passes over and covers the old pipe with a cladding tube. The conically shaped override head displaces the earth surrounding the old pipe during propulsion and thereby forms a cavity for the hull or new pipe.
Die beschriebenen Vorrichtungen umgreifen die Altleitung ringförmig. Dies führt dazu, daß beim Vortrieb nicht nur ein hoher Kraftaufwand erforderlich ist, sondern Hindernisse entweder gar nicht oder nur unter erheblichen Schwierigkeiten überwunden werden können. Solche Hindernisse können insbesondere in Form von Muffen, Verdickungen oder Reparaturstellen am Rohr auftreten, aber auch durch Rohrabzweigungen oder Rohrkrümmungen gebildet sein. In der Praxis bringt zum Beispiel eine Rohrmuffe, wenn sie den Rohraußendurchmesser um mehr als den Innendurchmesser des rohrförmigen Bohrwerkzeugs überschreitet, den Bohrvorgang zum Stillstand.The devices described surround the old line annular. This leads to the fact that not only a great deal of effort is needed in the propulsion, but obstacles either not at all or can be overcome only with considerable difficulty. Such obstacles can occur in particular in the form of sleeves, thickenings or repairs on the pipe, but also be formed by pipe branches or pipe bends. In practice, for example, a pipe socket, if it exceeds the pipe outside diameter by more than the inside diameter of the tubular drilling tool, stops the drilling operation.
In der DE 198 53 198 C1 ist ein Verfahren zum Rohrleitungsaustausch beschrieben, bei dem mehrere Bohrungen entlang und in der Nähe der Altleitung durchgeführt werden und ein Spülkopf durch diese Bohrungen zurückgezogen wird, um einen entsprechenden Ringraum um die Altleitung auszubilden. Dieses Verfahren ist zeit- und kostenaufwendig, da vor dem Leitungsaustausch zunächst mehrere Bohrschritte erforderlich sind.In DE 198 53 198 C1, a method for piping exchange is described, in which a plurality of holes along and in the vicinity of the old line are performed and a flushing head is withdrawn through these holes to form a corresponding annular space around the old line. This process is time-consuming and costly, since before the line exchange first several drilling steps are required.
Der Erfindung liegt nun die Aufgabe zugrunde, eine Vorrichtung zu schaffen, die ein einfaches Freiräumen der im Erdreich verlegten Leitung erlaubt. Der Erfindung liegt femer die Aufgabe zugrunde, ein dafür geeignetes Verfahren zur Verfügung zu stellen.The invention is an object of the invention to provide a device that allows a simple clearance of the laid in the ground line. The invention is also the object of providing a suitable method available.
Die Aufgabe wird durch eine Vorrichtung und ein Verfahren gemäß den unabhängigen Ansprüchen gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.The object is achieved by an apparatus and a method according to the independent claims. Advantageous developments are the subject of the dependent claims.
Erfindungsgemäß wird von einem Ringschluß des Bohrwerkzeugs abgesehen und damit ein Überfahren von Hindernissen am Rohr oder an der Leitung ermöglicht. Je nach Ausgestaltung des Bohrwerkzeugs kann eine erhebliche Verringerung des Vortriebswiderstandes und ein problemloses Überfahren oder Umfahren von Muffen, Schellen oder Krümmungen der Altleitung erreicht werden.According to the invention apart from a ring closure of the drilling tool and thus allows driving over obstacles on the pipe or on the line. Depending on the design of the drilling tool, a considerable reduction of the propulsion resistance and a problem-free driving over or around of sleeves, clamps or bends of the old line can be achieved.
Vorzugsweise wird die Altleitung mit einem Bohrwerkzeug in Form einer offenen Manschette oder einer gekrümmten Schaufel zu mehr als 50%, vorteilhafterweise zu 60% umgriffen. Bei einer anderen Ausführungsform besitzt das Bohrwerkzeug eine schraubenförmige Ausgestaltung, die besonders für das Überfahren von Muffen und Abzweigungen geeignet ist.Preferably, the old pipe is gripped with a drilling tool in the form of an open cuff or a curved blade to more than 50%, advantageously 60%. In another embodiment, the drilling tool has a helical configuration, which is particularly suitable for driving over sleeves and branches.
Die erfindungsgemäße Vorrichtung kann Austrittsdüsen für eine Spülflüssigkeit aufweisen, die so ausgerichtet sein können, daß ein ringförmiger Spülraum entsteht. Die Düsen können dabei einen fächerförmigen Düsenkranz ausbilden, der trotz des fehlenden Ringschlusses des Bohrwerkzeugs zu einem vollständigen Freispülen des Altrohrs führt.The device according to the invention can have outlet nozzles for a rinsing liquid, which can be aligned so that an annular rinsing space is created. The nozzles can form a fan-shaped nozzle ring, which leads to a complete flushing of the old pipe despite the lack of ring closure of the drilling tool.
Bei einer besonders bevorzugten Ausführungsform weist das Bohrwerkzeug eine Schneidfläche auf, mit der Hindernisse, wie beispielsweise Abzweigungen, abgetrennt werden können. Ferner kann die Vorrichtung eine Steuerfläche aufweisen, mit der Hindernisse gezielt angefahren und gegebenenfalls unter Wiederholung des Vorganges abgetrennt werden können.In a particularly preferred embodiment, the drilling tool on a cutting surface, with the obstacles, such as branches, can be separated. Furthermore, the device may have a control surface, can be specifically approached with the obstacles and optionally separated with repetition of the process.
Die besondere Geometrie der erfindungsgemäßen Vorrichtung erlaubt es, Hindernisse ohne Schwierigkeiten zu umfahren und bei bevorzugter Ausgestaltung dem Verlauf des Altrohres zwangsweise zu folgen, so daß auch Krümmungsabschnitte des Rohres zielsicher überwunden werden, ohne daß das Bohrwerkzeug die Rohrtrasse verläßt.The particular geometry of the device according to the invention makes it possible to avoid obstacles without difficulty and forcibly follow the course of the old pipe in a preferred embodiment, so that even curvature sections of the pipe are reliably overcome without the drilling tool leaving the pipe route.
Die Erfindung ist insbesondere für den Austausch langer Rohrabschnitte geeignet, da diese nun erstmalig ohne Behinderung freigeräumt werden, können. Die erfindungsgemäße Vorrichtung eignet sich für den Austausch von Altleitungen beliebigen Materials und erlaubt es, problemlos Neurohre des gleichen oder größeren Durchmessers in den Erdkanal einzuziehen.The invention is particularly suitable for the replacement of long pipe sections, as they are now cleared for the first time without hindrance can. The device according to the invention is suitable for the replacement of old pipes of any material and allows to easily feed new pipes of the same or larger diameter into the earth channel.
Die Vorrichtung wird im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels des näheren erläutert.The device is explained below with reference to an embodiment shown in the drawing of the closer.
In der Zeichnung zeigen:
- Fig. 1:
- die Erfindung in manschetten- oder schaufelförmiger Ausgestaltung;
- Fig. 2:
- eine Seitenansicht der Ausführungsform der Fig. 1;
- Fig. 3:
- eine Vorderansicht auf die Stirnfläche der Ausführungsform der Fig. 1 und
- Fig. 4:
- eine schraubenförmige Ausgestaltung des erfindungsgemäßen Bohrwerkzeugs;
- Fig. 5 bis 7:
- weitere Ausführungsformen des Bohrwerkzeuges.
- Fig. 1:
- the invention in cuff or blade-shaped configuration;
- Fig. 2:
- a side view of the embodiment of Fig. 1;
- 3:
- a front view of the end face of the embodiment of Fig. 1 and
- 4:
- a helical configuration of the drilling tool according to the invention;
- 5 to 7:
- further embodiments of the drilling tool.
Die erfindungsgemäße Vorrichtung weist ein Bohrwerkzeug 1 mit Düsen 2 und einer Steuerfläche 3 auf. Durch die geometrische Ausgestaltung des in Fig. 1 dargestellten Bohrwerkzeugs weist dieses eine wannenförmige Innenfläche 6 auf, die an dem äußeren Altleitungs- oder Rohrumfang anliegt. Bei der in Fig. 4 dargestellten Ausführungsform ist die am Außenmantel der Rohrleitung anliegende Führungsfläche durch die Innenfläche 6 des schraubenförmig ausgestalteten Bohrkopfes 1 ausgebildet. Das Bohrwerkzeug weist stimseitig eine Schneidkante 8 auf, mit der Hindernisse vom Außenmantel der Leitung entfernt werden können. Die offene Gestaltung des Bohrwerkzeugs erlaubt es aber auch, Hindernisse zu umfahren.The device according to the invention has a
Bei den Düsen 2 handelt es sich vorzugsweise um Hochdruckdüsen, mit denen ein Wasserstrahl, eine Bentonitsuspension oder ein anderes Spülmedium in den Ringraum eingebracht wird. Die Düsen sind kranzförmig auf der Stirnseite des Bohrwerkzeugs 1 angeordnet und so ausgerichtet, daß das Altrohr vollständig umspült wird (Fig. 3).The
Zum Auswechseln einer Altleitung wird das Bohrwerkzeug mit einem Schubgestänge verbunden und in einer Startgrube auf die dort freigelegte Altleitung aufgesetzt. Daraufhin wird das Werkzeug 1 unter Einsatz der Spüldüsen 2 an dem Rohr entlang mittels eines (nicht dargestellten) Schubantriebs vorangetrieben und das Rohr mit Hilfe des Spülmediums vollständig umspült. Beim Auftreffen auf ein Hindemis wird dieses entweder durch gezielte gestängevermittelte Rotation des Bohrwerkzeugs umfahren oder in einem oder in mehreren Schritten durch Aufbringen der erforderlichen Schubkraft zerstörend überwunden. Nach dem Freiräumen der Altleitung kann diese problemlos aus dem Erdreich entfernt und durch eine neue Leitung ersetzt werden.To replace an old pipe, the drilling tool is connected to a push rod and placed in a starting pit on the exposed there old pipe. Thereafter, the
Claims (12)
- Boring device for producing a peripheral bore on a line laid in the ground, wherein a boring tool is connected to a pushing rod assembly and is moved over the old line by means of a push drive, characterised in that the boring tool (1) encompasses the line in open manner by more than 50% without enclosing it.
- Boring device according to claim 1, characterised in that it encompasses the line by 60%.
- Boring device according to one of the preceding claims, characterised in that it has the form of a blade or an open sleeve or a cut half cone.
- Boring device according to one of the claims 1 or 2, characterised by a screw-shaped design.
- Boring device according to one of the preceding claims, characterised by exit nozzles (2) for a rinsing fluid.
- Boring device according to claim 5, characterised in that the exit nozzles (2) are oriented so that a ring-shaped rinsing space comes about.
- Boring device according to claim 6, characterised by a bent crown of nozzles spreading out in a fan shape.
- Boring device according to one of the preceding claims, characterised by a cutting surface or a plurality of cutting surfaces (8).
- Boring device according to one of the preceding claims, characterised by a steering surface (3).
- Method for producing a peripheral bore round an old line laid in the ground and/or for replacing and/or removing this old line, characterised by- placement of a boring tool (1) according to one of the preceding claims on the old line,- moving the boring tool (1) along the old line, whereby a stroke from a push drive is transmitted by a pushing rod assembly to the boring tool,- creating a space comprising at least a circular segment of the old line.
- Method according to claim 10, characterised by- targeted approaching of obstacles,- separating of obstacles from the old line.
- Method according to claim 10 or 11, characterised by- connecting a rinsing device,- rinsing out a ring-shaped space,- driving the boring tool forwardly.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10053567A DE10053567B4 (en) | 2000-10-27 | 2000-10-27 | Drilling tool and device for producing a circumferential bore |
| DE10053567 | 2000-10-27 | ||
| PCT/EP2001/012486 WO2002035050A1 (en) | 2000-10-27 | 2001-10-29 | Device for producing a peripheral hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1332269A1 EP1332269A1 (en) | 2003-08-06 |
| EP1332269B1 true EP1332269B1 (en) | 2006-03-29 |
Family
ID=7661426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01988814A Expired - Lifetime EP1332269B1 (en) | 2000-10-27 | 2001-10-29 | Device for producing a peripheral hole |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1332269B1 (en) |
| AU (1) | AU2002221776A1 (en) |
| DE (1) | DE10053567B4 (en) |
| WO (1) | WO2002035050A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009012083A1 (en) * | 2009-03-06 | 2010-11-11 | Tracto-Technik Gmbh & Co. Kg | Method for trenchless laying of one or multiple new conductors, particularly cables, involves over-drilling old pipe with overdrilling head which is driven by drilling rod in sliding manner |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007050931B4 (en) * | 2007-10-23 | 2015-03-12 | Tracto-Technik Gmbh & Co. Kg | Overhead for displacing the soil surrounding a pipe and method for over-drilling |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403667A (en) * | 1981-08-03 | 1983-09-13 | Electric Power Research Institute, Inc. | Cable following apparatus utilizing a releasable cable gripping mechanism |
| US4593772A (en) * | 1982-09-02 | 1986-06-10 | Electric Power Research Institute, Inc. | Rotary cutter for cable following apparatus |
| US4519462A (en) * | 1982-09-02 | 1985-05-28 | Electric Power Research Institute, Inc. | Cable following apparatus having cable cleaning capabilities and method |
| DE3940354A1 (en) * | 1989-06-14 | 1990-12-20 | Paul Speeck Gmbh & Co Kg | Underground pipe removal method - involves cutting through in lengthwise direction and forming space between it and earth |
| DE4220430C2 (en) * | 1992-06-24 | 1994-09-22 | Tracto Technik | Method and device for making an earth borehole |
| FI95962C (en) * | 1994-01-21 | 1996-04-10 | Aineko Ab Oy | Device especially for sanitization of sewerage systems by using forced retraction method |
| DE19504484C1 (en) * | 1995-02-10 | 1996-09-19 | Flowtex Technologie Import Von | Equipment for removing earth around buried cables or empty pipes |
| DE19522579C1 (en) * | 1995-06-16 | 1996-07-25 | Berliner Wasser Betriebe | Method of replacing underground pipes without excavating |
| DE29703655U1 (en) * | 1997-02-28 | 1997-12-04 | Welldone Engineering GmbH, 29355 Beedenbostel | Tool for horizontal drilling |
| US6250403B1 (en) * | 1997-09-30 | 2001-06-26 | The Charles Machine Works, Inc. | Device and method for enlarging a Bore |
| AU758277B2 (en) * | 1997-10-15 | 2003-03-20 | Se S.R.L. | Directional drilling tool |
| DE19853198C1 (en) * | 1998-11-18 | 2000-01-05 | Flowtex Technologie Gmbh & Co | Replacement of underground pipes of different diameter without digging, with optional expansion to greater conducting cross-sections |
| NO310311B1 (en) * | 1999-06-24 | 2001-06-18 | Thor Bjoernstad | underreamed |
-
2000
- 2000-10-27 DE DE10053567A patent/DE10053567B4/en not_active Expired - Fee Related
-
2001
- 2001-10-29 EP EP01988814A patent/EP1332269B1/en not_active Expired - Lifetime
- 2001-10-29 AU AU2002221776A patent/AU2002221776A1/en not_active Abandoned
- 2001-10-29 WO PCT/EP2001/012486 patent/WO2002035050A1/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009012083A1 (en) * | 2009-03-06 | 2010-11-11 | Tracto-Technik Gmbh & Co. Kg | Method for trenchless laying of one or multiple new conductors, particularly cables, involves over-drilling old pipe with overdrilling head which is driven by drilling rod in sliding manner |
| DE102009012083B4 (en) * | 2009-03-06 | 2016-10-20 | Tracto-Technik Gmbh & Co. Kg | Method for trenchless laying of one or more new pipelines along an already laid old pipeline, over-drilling head for over-drilling an old pipeline laid in the ground, draw-in head and a corresponding drill string |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1332269A1 (en) | 2003-08-06 |
| WO2002035050A1 (en) | 2002-05-02 |
| AU2002221776A1 (en) | 2002-05-06 |
| DE10053567B4 (en) | 2004-05-06 |
| DE10053567A1 (en) | 2002-06-06 |
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