EP0583650A1 - Method and device for underground introduction of long transport pipes into the earth - Google Patents

Method and device for underground introduction of long transport pipes into the earth Download PDF

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Publication number
EP0583650A1
EP0583650A1 EP93111837A EP93111837A EP0583650A1 EP 0583650 A1 EP0583650 A1 EP 0583650A1 EP 93111837 A EP93111837 A EP 93111837A EP 93111837 A EP93111837 A EP 93111837A EP 0583650 A1 EP0583650 A1 EP 0583650A1
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EP
European Patent Office
Prior art keywords
auxiliary
length
section
auxiliary pipe
sections
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Granted
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EP93111837A
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German (de)
French (fr)
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EP0583650B1 (en
Inventor
Friedrich Dipl.-Ing. Schlemm
Manfred Dr.-Ing. Veenker
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BEB Erdgas und Erdol GmbH
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BEB Erdgas und Erdol GmbH
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/046—Directional drilling horizontal drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Definitions

  • the invention relates to a method for the underground insertion of transport pipes of greater length in the ground, in which a media-conducting media or product pipe composed of individual pieces arranged one behind the other from a press pit by means of a hydraulic, pneumatic or mechanical press device in a substantially horizontal direction in the Soil is pressed.
  • Pipes of this type can fulfill a wide range of tasks, for example the transportation of oil, natural gas or the like and of supply and waste water, but they can also be used for the reception and subsequent retraction of cables, be it for electrical power or for telephone lines or for communication lines of any other kind, while at the same time exercising a protective function for such lines.
  • Pipes of the type mentioned are usually either pushed upstream of the pressing device with a drill head or, in the simpler case, provided with a cutting ring at their front end which clears or loosens the soil, so that the cut-off soil can be removed by means of a screw conveyor pointing towards the press pit becomes.
  • a further disadvantage of the known methods is that in the case of pronouncedly thin tubes, their length is limited because, on the one hand, they tend to buckle due to the so-called chest resistance and, on the other hand, they are pretensioned in individual section sections, which can become so large that the pipe may be destroyed.
  • the length that can be introduced in one operation is therefore also limited in pipes with a relatively small cross section.
  • the invention is accordingly based on the object of designing a method of the type mentioned at the outset and an apparatus for carrying out the method in such a way that, despite the use of the known pressing devices, one-piece tubes of greater length can be introduced.
  • auxiliary pipes are introduced into the soil by means of the pressing device, which consist of individual telescoping interlocking sections, the respective output section having a length that corresponds to the length that with economic and optimal conditions according to the previous state the technology is achievable, while the following section has a length that projects beyond the preceding section by that initial length, the media or product pipe engaging in a strand of auxiliary pipes assembled in this way and then in turn the respective last auxiliary pipe section by this initial length towered over.
  • a first auxiliary pipe is first inserted into the soil, which has the above-mentioned initial length and with the introduction of which the power of the pressing device is optimally used. Then the drill head is pulled back through the first auxiliary pipe and the drilling material and the soil are then moved using a screw conveyor or other drilling aids is removed. The second auxiliary pipe section is then introduced into the first auxiliary pipe section, the outer diameter of the second auxiliary pipe section being adapted to the inner diameter of the first auxiliary pipe section such that both auxiliary pipe sections with a sufficient tolerance range so that the second auxiliary tube section can slide easily in the first.
  • the second auxiliary pipe section is approximately twice the length of the first, after it has passed through the first auxiliary pipe section, its front end is inserted into the ground as well as the original first section, so that now after the introduction of the second auxiliary pipe section, approximately twice the pipe length for the product pipe is available.
  • the further auxiliary tube sections are introduced, which always engage in the previously inserted auxiliary tube section and each protrude above the preceding auxiliary tube section by approximately the initial length of the first auxiliary tube section until the desired tube length for the product tube is reached or the ratio of the initial diameter of the first Auxiliary pipe section to the inner diameter of the product pipe limits the length of the product pipe.
  • the inside diameter of the product tube is of course dependent on the medium which is to be conveyed and transported with the product tube or to be absorbed by it.
  • the individual auxiliary pipe sections are also in a manner known per se from their end face out of the press pit acted upon with the pressing device there, like the previous one with respect to the type of introduction, one-piece product pipes which are introduced as a whole into the soil in the manner described.
  • auxiliary pipe sections can remain in the ground after completion of the pipeline; but there is also the possibility of pulling them out again, which is labor-intensive and tedious.
  • the auxiliary pipes remaining in the ground represent a considerable amount of material, which causes corresponding costs, so that the invention is based on the further object of keeping the material accumulation, which is not necessary for the operation of the product pipe itself, small.
  • the individual auxiliary pipe sections have approximately the same length, which corresponds to the length that can be achieved with economical and optimal conditions according to the prior art, the successive auxiliary pipe sections having different diameters, so that the respective preceding auxiliary pipe sections can accommodate the subsequent auxiliary pipe section ends, the adjoining auxiliary pipe section ends only overlapping slightly, namely as far as is necessary for the stability of the Connection is necessary, and in each case a pressure or support tube, which is inserted between the pressure-pressure-side end of the preceding auxiliary tube section and the pressing device, is provided, the outside diameter of which corresponds in each case to the outside diameter of the respective auxiliary tube section to be acted upon and on which the pressing device acts.
  • the pressure or support tubes have a length that corresponds approximately to the length of the individual auxiliary tube sections.
  • auxiliary pipe sections each have the same length, so that the introduction of the auxiliary pipe sections into the ground and their storage is also facilitated.
  • the product pipe can be made "in one piece” and can be driven into the ground over the entire, sometimes considerable, distance in one work step, because only its front section comes into contact with the ground, while the entire rear length is within the auxiliary pipes.
  • Controls for this are known per se, they consist of inclinometers for the vertical and of so-called bound circles for the horizontal, in which the fact is used that the gyro axis which has been initiated once wants to maintain its position.
  • a pressing device consisting of a pressure ring 2 or the like is provided in a so-called press pit 1, which can be operated from a control station 3.
  • the pressure ring 2 can be acted upon in various ways, namely pneumatically, electropneumatically, mechanically, etc., but preferably hydraulically.
  • pressure assemblies 4 preferably arranged in a circle, move on the pressure ring 2 and move the pressure ring 2 in the direction of the arrow 5.
  • the pressure ring 2 in turn acts on auxiliary pipes 11 to 71 (cf. FIG. 3), of which the two first auxiliary pipes 11 and 21 in the illustration according to FIG. 1 have already been introduced into the soil 8.
  • the two auxiliary tubes 11 and 21 telescope into one another, the end of the second auxiliary tube 21 on the press pit side being flush with the end of the first auxiliary tube 11 on the press pit side.
  • next aid pipe 31 according to FIG. 1 is, as shown in FIG. 1, still in a position in which it has not yet reached its end point. Accordingly, with its rear end to the right in FIG. 1, it protrudes beyond the first auxiliary pipe 11 with the section 31a so marked there.
  • Fig. 2 shows this process again in detail and reveals that there are five auxiliary tubes of different lengths are telescopically assembled. These are the outer short auxiliary pipe 11, the subsequent auxiliary pipe 21, the auxiliary pipe 31 and a product pipe 41, which is being retracted in the illustration according to FIG. 2.
  • the length 1 of the press pit 1 is chosen so that the usual pipe lengths, i.e. the length of the individual pieces from which the pipes are assembled, plus the jacking units can be taken up by the press pit.
  • Fig. 3 shows a completed pipe laying below a mudflats 9, which can be completely underrun with the device according to the invention without having to make environmentally harmful upheavals.
  • the water 10 running above the mudflats is protected as well as the marine flora and fauna.
  • FIG. 3 show the large spans in which the arrangement according to the invention and the method according to the invention can be used.
  • the next auxiliary tube always had a length such that, as can be seen from FIG. 3, each auxiliary tube reached from the respective left end in FIG. 3 to the press pit 1.
  • the disadvantages of the resulting material accumulation have been described above.
  • FIG. 5 shows an embodiment for introducing the individual short pipe sections.
  • FIG. 4. pressure pipes 14 are provided which are acted upon by the pressure ring 2 (cf. FIG. 1) in the manner described and thus the bring each last pipe section 101 into its position according to FIG. 4.
  • the pipe sections 81 and 91 which have already been introduced are shown in FIG. 5 in a highly distorted manner compared to their actual dimensions.

Abstract

A method of introducing long transport pipes underground into the earth, in which a media or product pipe conducting the media and composed of individual pieces arranged one behind the other is jacked into the earth in an essentially horizontal direction from a jacking pit by means of a hydraulic, pneumatic or mechanical jacking device, is to be developed in such a way that longer one-piece pipes can be introduced despite the use of the known jacking devices. To this end, provision is made according to the invention for auxiliary pipes to be introduced into the earth by means of the jacking device. The auxiliary pipes consist of individual sections engaging telescopically one inside the other, the respective initial section being of a length which corresponds to the length which can be achieved with cost-effective and optimum conditions according to the prior art, while the respectively following section is of a length which projects beyond the respectively preceding section by that initial length, the media or product pipe engaging in a string of auxiliary pipes assembled in this way and then projecting in turn beyond the respective last auxiliary pipe section by this initial length. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur unterirdischen Einbringung von Transportrohren größerer Länge in das Erdreich, bei welchem ein die Medien leitendes aus hintereinander engeordneten Einzelstücken zusammengesetztes Medien- oder Produktenrohr von einer Preßgrube aus mittels einer hydraulischen, pneumatischen oder mechanischen Preßvorrichtung in im wesentlichen horizontaler Richtung in das Erdreich eingepreßt wird.The invention relates to a method for the underground insertion of transport pipes of greater length in the ground, in which a media-conducting media or product pipe composed of individual pieces arranged one behind the other from a press pit by means of a hydraulic, pneumatic or mechanical press device in a substantially horizontal direction in the Soil is pressed.

Rohre dieser Art können vielfältige Aufgeben erfüllen, so können sie zum Beispiel dem Transport von Erdöl, Erdgas oder dergleichen sowie von Zu- und Abwasser dienen, sie können aber auch der Aufnahme und nachträglichen Einziehung von Kabeln, sei es für elektrischen Strom oder für Telefonleitungen oder für Kommunikationsleitungen anderer Art dienen, wobei sie gleichzeitig eine Schutzfunktion für derartige Leitungen ausüben.Pipes of this type can fulfill a wide range of tasks, for example the transportation of oil, natural gas or the like and of supply and waste water, but they can also be used for the reception and subsequent retraction of cables, be it for electrical power or for telephone lines or for communication lines of any other kind, while at the same time exercising a protective function for such lines.

Rohre der genannten Art werden üblicherweise entweder unter Vorschaltung eines Bohrkopfes durch die Preßvorrichtung vorgeschoben oder aber im einfacheren Fall mit einem Schneidring an ihrem vorderen Ende versehen, welcher das Erdreich räumt oder auflockert, so daß der Abtransport des abgeschnittenen Bodens mittels einer zur Preßgrube hinweisenden Förderschnecke möglich wird.Pipes of the type mentioned are usually either pushed upstream of the pressing device with a drill head or, in the simpler case, provided with a cutting ring at their front end which clears or loosens the soil, so that the cut-off soil can be removed by means of a screw conveyor pointing towards the press pit becomes.

Nachteilig bei diesen bekannten Verfahren ist es, daß aufgrund der technisch begrenzten Preßdrücke auch die Länge des in einem Arbeitsgang einstückig einbringbaren Rohres begrenzt ist, weil die Reibung auf dar Außenseite des Rohres, also auf der Mantelfläche zwischen Rohr und Erdreich eine Größe erreichen kann, die nur den Vortrieb einer bestimmten Rohrlänge zuläßt. Dieser Reibungsbeiwert ist einerseits abhängig von der Größe der Mantelfläche, die mit dem Erdreich in Verbindung steht, andererseits ist er aber auch von der Zusammensetzung der Konsistenz des Erdreiches sowie von dem sogenannten Gebirgsdruck abhängig, also von dem Druck, den das oberhalb des Rohres befindliche Erdreich auf das Rohr ausübt.It is a disadvantage of these known methods that, due to the technically limited pressing pressures, the length of the pipe that can be integrally inserted in one operation is limited because the friction on the outside of the pipe, i.e. on the lateral surface between the pipe and the soil, can reach a size that only allows the advance of a certain length of pipe. This coefficient of friction is dependent on the one hand on the size of the surface area that is connected to the soil, but on the other hand it is also dependent on the composition of the consistency of the soil and the so-called rock pressure, that is, the pressure that the soil above the pipe exerts on the pipe.

Die obengenannte Begrenzung der Rohrlänge ergibt sich außerdem aus der mathematischen Beziehung zwischen Rohrdurchmesser und Rohroberfläche, wobei sich bei durchschnittlichen Reibungsbeiwerten (normales Erdreich) ergibt, daß mit den größten wirtschaftlich verwendbaren Preßvorrichtung bei einem Rohrdurchmesser von 1.000 mm eine Rohrlänge von etwa 1.000 m in einem Arbeitsgang einbringbar ist.The above-mentioned limitation of the pipe length also results from the mathematical relationship between pipe diameter and pipe surface, whereby with average friction coefficients (normal soil) it follows that with the largest economically usable pressing device with a pipe diameter of 1,000 mm, a pipe length of about 1,000 m in one operation can be introduced.

Nachteilig bei den bekannten Verfahren ist es weiter, daß bei ausgeprägt dünnen Rohren diese in ihrer Länge deswegen begrenzt sind, weil sie einmal aufgrund des sogenannten Brustwiderstandes zum Ausknicken neigen und weil sie zum anderen in einzelnen Bereichsabschnitten unter Vorspannung gesetzt werden, die so groß werden kann, daß es zu einer Zerstörung des Rohres kommen kann. Auch bei Rohren mit einem relativ kleinen Querschnitt ist mithin die in einem Arbeitsgang einbringbare Länge begrenzt.A further disadvantage of the known methods is that in the case of pronouncedly thin tubes, their length is limited because, on the one hand, they tend to buckle due to the so-called chest resistance and, on the other hand, they are pretensioned in individual section sections, which can become so large that the pipe may be destroyed. The length that can be introduced in one operation is therefore also limited in pipes with a relatively small cross section.

Der Erfindung liegt demgemäß die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art und eine Vorrichtung zur Durchführung des Verfahrens so auszubilden, daß trotz der Verwendung der bekannten Preßvorrichtungen einstückige Rohre größerer Länge eingebracht werden können.The invention is accordingly based on the object of designing a method of the type mentioned at the outset and an apparatus for carrying out the method in such a way that, despite the use of the known pressing devices, one-piece tubes of greater length can be introduced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß in das Erdreich mittels der Preßvorrichtung Hilfsrohre eingebracht werden, die aus einzelnen teleskopertig ineinander eingreifenden Abschnitten bestehen, wobei der jeweilige Ausgangsabschnitt eine Länge hat, die derjenigen Länge entspricht, die mit wirtschaftlichen und optimalen Bedingungen gemäß dem bisherigen Stand der Technik erreichbar ist, während der jeweils folgende Abschnitt eine Länge hat, die den jeweils vorangehenden Abschnitt um jene Ausgangslänge überragt, wobei des Medien- oder Produktenrohr in einen Strang von auf diese Weise zusammengesetzten Hilfsrohren eingreift und dann seinerseits den jeweiligen letzten Hilfsrohrabschnitt um diese Ausgangslänge überragt.This object is achieved in that auxiliary pipes are introduced into the soil by means of the pressing device, which consist of individual telescoping interlocking sections, the respective output section having a length that corresponds to the length that with economic and optimal conditions according to the previous state the technology is achievable, while the following section has a length that projects beyond the preceding section by that initial length, the media or product pipe engaging in a strand of auxiliary pipes assembled in this way and then in turn the respective last auxiliary pipe section by this initial length towered over.

Bei diesem Verfahren wird also zunächst ein erstes Hilfsrohr in das Erdreich eingebracht, das die obengenannte Ausgangslänge hat und mit dessen Einbringung die Leistung der Preßvorrichtung optimal ausgenutzt wird, Anschließend wird der Bohrkopf durch das erste Hilfsrohr zurückgezogen und des Bohrgut und der Boden mittels eines Schneckenförderers oder anderer Bohrhilfsmittel entfernt wird. Sodann wird der zweite Hilfsrohrabschnitt in den ersten Hilfarohrabschnitt eingebracht, wobei der Außendurchmesser des zweiten Hilferohrabschnittes dem Innendurchmesser des ersten Hilfsrohrabschnittes derart angepaßt ist, daß beide Hilfsrohrabschnitte mit einem ausreichenden Toleranzbereich ineinandergroifen, so daß der zweite Hilfsrohrabschnitt im ersten leicht gleiten kann. Da der zweite Hilferohrabschnitt etwa die doppelte Länge wie der erste hat, wird, nachdem er den ersten Hilfsrohrabschnitt durchgriffen hat, sein vorderes Ende ebenso in des Erdreich eingeführt wie der ursprüngliche erste Abschnitt, so daß nunmehr nach Einbringung des zweiten Hilfarohrabschnittes etwa die doppelte Rohrlänge für das Produktenrohr zur Verfügung steht.With this method, a first auxiliary pipe is first inserted into the soil, which has the above-mentioned initial length and with the introduction of which the power of the pressing device is optimally used.Then the drill head is pulled back through the first auxiliary pipe and the drilling material and the soil are then moved using a screw conveyor or other drilling aids is removed. The second auxiliary pipe section is then introduced into the first auxiliary pipe section, the outer diameter of the second auxiliary pipe section being adapted to the inner diameter of the first auxiliary pipe section such that both auxiliary pipe sections with a sufficient tolerance range so that the second auxiliary tube section can slide easily in the first. Since the second auxiliary pipe section is approximately twice the length of the first, after it has passed through the first auxiliary pipe section, its front end is inserted into the ground as well as the original first section, so that now after the introduction of the second auxiliary pipe section, approximately twice the pipe length for the product pipe is available.

In entsprechender Weise werden die weiteren Hilfsrohrabschnitte eingebracht, die stets in den jeweils zuvor eingebrachten Hilfsrohrabschnitt eingreifen und die jeweils den vorangehenden Hilfsrohrabschnitt um etwa die Ausgangslänge des ersten Hilfsrohrabschnittes überragen, bis die gewünschte Rohrlänge für das Produktenrohr erreicht ist oder aber das Verhältnis von Ausgangsdurchmesser des ersten Hilfsrohrabschnittes zum Innendurchmesser des Produktanrohras die Länge des Produktenrohres begrenzt. Der Innendurchmesser des Produktenrohres ist selbstverständlich abhängig von dem Medium, welches mit dem Produktenrohr gefördert und transportiert oder durch dieses aufgenommen werden soll.In a corresponding manner, the further auxiliary tube sections are introduced, which always engage in the previously inserted auxiliary tube section and each protrude above the preceding auxiliary tube section by approximately the initial length of the first auxiliary tube section until the desired tube length for the product tube is reached or the ratio of the initial diameter of the first Auxiliary pipe section to the inner diameter of the product pipe limits the length of the product pipe. The inside diameter of the product tube is of course dependent on the medium which is to be conveyed and transported with the product tube or to be absorbed by it.

Die einzelnen Hilfsrohrabschnitte werden in an sich bekannter Weise ebenso von ihrer Stirnseite her aus der Preßgrube heraus mit der dortigen Preßvorrichtung beaufschlagt wie die bisherigen im Hinblick auf die Einbringungeart einstückigen Produktenrohre, die als Ganzes in der beschriebenen Weise in das Erdreich eingebracht werden.The individual auxiliary pipe sections are also in a manner known per se from their end face out of the press pit acted upon with the pressing device there, like the previous one with respect to the type of introduction, one-piece product pipes which are introduced as a whole into the soil in the manner described.

Die Hilfsrohrabschnitte können nach Fertigstellung der Rohrleitung im Boden verbleiben; es besteht aber auch die Möglichkeit, sie wieder herauszuziehen, was arbeitsaufwendig und mühsam ist.The auxiliary pipe sections can remain in the ground after completion of the pipeline; but there is also the possibility of pulling them out again, which is labor-intensive and tedious.

Andererseits stellen die im Boden verbleibenden Hilfsrohre doch eine erhebliche Materialmenge dar, die entsprechende Kosten verursacht, so daß der Erfindung die weitere Aufgabe zugrundeliegt, diee Materialanhäufung, die für den Betrieb des Produktenrohres selbst nicht erforderlich ist, klein zu halten.On the other hand, the auxiliary pipes remaining in the ground represent a considerable amount of material, which causes corresponding costs, so that the invention is based on the further object of keeping the material accumulation, which is not necessary for the operation of the product pipe itself, small.

Hierzu ist erfindungsgemäß weiter vorgesehen, daß die einzelnen Hilfsrohrabschnitte etwa die gleiche Länge haben, die derjenigen Länge entspricht, die mir wirtchaftlichen und optimalen Bedingungen gemäß dem bisherigen Stand der Technik erreichbar ist, wobei die aufeinanderfolgenden Hilfsrohrabschnitte unterschiedliche Durchmesser haben, so daß die jeweils vorangehenden Hilfsrohrabschnitte die nachfolgenden Hilfsrohrabschnittsenden aufnehmen können, wobei sich die aneinander anschließenden Hilfsrohrabschnittsenden nur geringfügig, nämlich so weit überlappen, wie es zur Stabilität der Verbindung notwendig ist, und wobei jeweils ein Druck- oder Stützrohr, das zwischen das preßdruckseitige Ende des vorangehenden Hilfsrohrabschnittes und die Preßvorrichtung eingesetzt ist, vorgesehen ist, dessen Außendurchmesser jeweils dem Außendurchmesser des jeweiligen zu beaufschlagenden Hilfsrohrabschnittes entspricht und auf welches die Preßvorrichtung wirkt.For this purpose, it is further provided according to the invention that the individual auxiliary pipe sections have approximately the same length, which corresponds to the length that can be achieved with economical and optimal conditions according to the prior art, the successive auxiliary pipe sections having different diameters, so that the respective preceding auxiliary pipe sections can accommodate the subsequent auxiliary pipe section ends, the adjoining auxiliary pipe section ends only overlapping slightly, namely as far as is necessary for the stability of the Connection is necessary, and in each case a pressure or support tube, which is inserted between the pressure-pressure-side end of the preceding auxiliary tube section and the pressing device, is provided, the outside diameter of which corresponds in each case to the outside diameter of the respective auxiliary tube section to be acted upon and on which the pressing device acts.

Dadurch ergeben sich um das Produktenrohr herum lediglich einwandige Hilfsrohrabschnitte (von der Überlappung einmal abgesehen) nicht aber eine Materialanhäufung wie bei der ersten Ausführungsform. Gegenüber dieser muß allerdings eine zusätzliche Vorrichtung geschaffen werden, um die ineinander eingreifenden Hilfsrohrabschnitte in ihre jeweilige Lage zu bringen, da ein direkter Druck der Preßvorrichtung auf die jeweilige Stirnseite dann nicht möglich ist, wenn der jeweilige Hilfsrohrabschnitt innerhalb des dem Ausgangsabschnitt zugewandten Endes von der Preßvorrichtung in der Regel nicht erreicht werden kann.This results in only single-walled auxiliary pipe sections around the product pipe (apart from the overlap) but not a material accumulation as in the first embodiment. Compared to this, however, an additional device must be created in order to bring the intermeshing auxiliary tube sections into their respective position, since direct pressure of the pressing device on the respective end face is not possible if the respective auxiliary tube section is within the end of the pressing device facing the output section usually cannot be achieved.

Zweckmäßig ist es weiter, wenn die preßgrubenseitigen Enden der einzelnen Hilfsrohrabschnitte mit inneren Abschrägungen zur Erleichterung der Aufnahme der jeweils folgenden Hilfsrohrabschnittsenden versehen sind.It is further expedient if the ends of the individual auxiliary pipe sections on the press pit side are provided with internal bevels to facilitate the reception of the respective following auxiliary pipe section ends.

Diese geringfügige Überlappung erleichtert die Rückführung der einzelnen Hilfsrohrabschnitte ungemein, weil es sich jetzt um Hilfsrohrabschnitte handelt, die im Mittel um ein Mehrfaches kürzer sind als diejenigen, die bei den bekannten Verfahren verwendet wurden und die zu der oben beschriebenen Materialanhäufung führten.This slight overlap greatly facilitates the return of the individual auxiliary tube sections, because the auxiliary tube sections are now several times on average are shorter than those used in the known methods and which resulted in the material accumulation described above.

Zweckmäßig ist es weiter, wenn die Druck- oder Stützrohre eine Länge haben, die etwa der Länge der einzelnen Hilfsrohrabschnitte entspricht.It is also expedient if the pressure or support tubes have a length that corresponds approximately to the length of the individual auxiliary tube sections.

Besonders vorteilhaft ist es, wenn die einzelnen Hilfsrohrabschnitte jeweils die gleiche Länge haben, so daß auch das Einbringen der Hilfsrohrabschnitte in den Boden sowie deren Lagerhaltung erleichtert wird.It is particularly advantageous if the individual auxiliary pipe sections each have the same length, so that the introduction of the auxiliary pipe sections into the ground and their storage is also facilitated.

Gleichwohl kann das Produktenrohr "einstückig" ausgebildet werden und in einem Arbeitsgang über die gesamte, zum Teil also erhebliche Strecke in das Erdreich eingefahren werden, weil nur sein vorderster Abschnitt Kontakt zum Erdreich bekommt, während die gesamte rückwärtige Länge sich innerhalb der Hilfsrohre befindet.At the same time, the product pipe can be made "in one piece" and can be driven into the ground over the entire, sometimes considerable, distance in one work step, because only its front section comes into contact with the ground, while the entire rear length is within the auxiliary pipes.

Insbesondere bei dieser Ausführungsform, die ja eine besondere Führung der Rohrabschnitte im jeweils letzten Bereich erzwingt, muß für einen guten Geradeauslauf Sorge getragen werden. Steuerungen hierfür sind an sich bekannt, sie bestehen für die Vertikale aus Neigungsgebern und für die Horizontale aus sogenannten gefesselten Kreisein, bei denen der Umstand ausgenutzt wird, daß die einmal angestoßene Kreiselachse ihre Lage beibehalten will.Especially in this embodiment, which is a special guidance of the pipe sections in the last Area must be ensured that there is a good straight line. Controls for this are known per se, they consist of inclinometers for the vertical and of so-called bound circles for the horizontal, in which the fact is used that the gyro axis which has been initiated once wants to maintain its position.

Entsprechendes gilt steuerungstechnisch, wenn gegebenenfalls das einzuziehende Rohr aus bestimmten Gründen einen Bogen oder dergleichen durchlaufen soll, sei es, daß die Krümmung nun in der Horizontalen, sei es, daß sie in der Vertikalen oder dazwischen liegt.The same applies in terms of control technology if, for certain reasons, the pipe to be drawn in is to pass through an arc or the like, be it that the curvature is now horizontal, or that it is vertical or in between.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen in der Zeichnung näher erläutert.

Fig. 1
zeigt in schematischer Darstellung eine Rohrverlegungsanlage, auf die die Erfindung Anwendung findet.
Fig. 2
zeigt im Schnitt einen Ausschnitt aus der Anlage nach Fig. 1.
Fig. 3
zeigt im Schnitt ein Anwendungsbeispiel für das Unterfahren eines Wattgebietes.
Fig. 4
zeigt in schematischer Darstellung eine abgewandelte Ausführungsform der Teleskopeinrichtung.
Fig. 5
zeigt in schematischer Darstellung, teilweise geschnitten, eine Anordnugn zur Betätigung und Erzeugung eines Rohrstranges nach Fig. 4.
The invention is explained in more detail below on the basis of exemplary embodiments in the drawing.
Fig. 1
shows a schematic representation of a pipe laying system to which the invention is applied.
Fig. 2
shows a section of a section of the system of FIG. 1st
Fig. 3
shows on average an application example for driving under a mudflat area.
Fig. 4
shows a schematic representation of a modified embodiment of the telescopic device.
Fig. 5
4 shows a schematic representation, partially in section, of an arrangement for actuating and generating a pipe string according to FIG. 4.

Gemäß Fig. 1 ist in einer sogenannten Preßgrube 1 eine aus einem Druckring 2 oder dergleichen bestehende Preßeinrichtung vorgesehen, die von einem Steuerstand 3 aus bedienbar ist. Die Beaufschlagung des Druckringes 2 kann in verschiedener Weise, nämlich pneumatisch, elektropneumatisch, mechanisch usw., vorzugsweise aber hydraulisch erfolgen. Zu diesem Zweck greifen an dem Druckring 2 vorzugsweise kreisförmig angeordnete Druckaggregate 4 an, die den Druckring 2 in Richtung des Pfailes 5 verschieben. Der Druckring 2 beaufschlagt seinerseits Hilferohrs 11 bis 71 (vgl. Fig. 3), von denen die beiden ersten Hilfsrohre 11 und 21 in der Darstellung nach Fig. 1 bereits in das Erdreich 8 eingebracht sind. Wie aus Fig. 1 hervorgeht, greifen die beiden Hilfsrohre 11 und 21 teleskopartig ineinander, wobei das preßgrubenseitige Ende des zweiten Hilfsrohres 21 mit dem preßgrubenseitigen Ende des ersten Hilfsrohres 11 bündig liegt.According to FIG. 1, a pressing device consisting of a pressure ring 2 or the like is provided in a so-called press pit 1, which can be operated from a control station 3. The pressure ring 2 can be acted upon in various ways, namely pneumatically, electropneumatically, mechanically, etc., but preferably hydraulically. For this purpose, pressure assemblies 4, preferably arranged in a circle, move on the pressure ring 2 and move the pressure ring 2 in the direction of the arrow 5. The pressure ring 2 in turn acts on auxiliary pipes 11 to 71 (cf. FIG. 3), of which the two first auxiliary pipes 11 and 21 in the illustration according to FIG. 1 have already been introduced into the soil 8. As can be seen from FIG. 1, the two auxiliary tubes 11 and 21 telescope into one another, the end of the second auxiliary tube 21 on the press pit side being flush with the end of the first auxiliary tube 11 on the press pit side.

Das nächste Hilferohr 31 gemäß Fig. 1 befindet sich gemäß der Darstellung noch Fig. 1 noch in einer Lage, in welcher es seinen Endpunkt noch nicht erreicht hat. Es ragt demgemäß mit seinem rückwärtigen Ende nach rechts in Fig. 1 eine dem ersten Hilfsrohr 11 mit dem dort so gekennzeichneten Abschnitt 31a hinaus.The next aid pipe 31 according to FIG. 1 is, as shown in FIG. 1, still in a position in which it has not yet reached its end point. Accordingly, with its rear end to the right in FIG. 1, it protrudes beyond the first auxiliary pipe 11 with the section 31a so marked there.

Fig. 2 zeigt diesen Vorgang nochmals im einzelnen und läßt erkennen, daß dort fünf Hilfsrohre unterschiedlicher Länge teleskopartig zusammengefügt sind. Es handelt sich hier um das jeweils äußere kurze Hilferohr 11, das nachfolgende Hilferohr 21, das Hilfsrohr 31 und um ein Produktenrohr 41, welches in der Darstellung nach Fig. 2 gerade eingefahren wird.Fig. 2 shows this process again in detail and reveals that there are five auxiliary tubes of different lengths are telescopically assembled. These are the outer short auxiliary pipe 11, the subsequent auxiliary pipe 21, the auxiliary pipe 31 and a product pipe 41, which is being retracted in the illustration according to FIG. 2.

Die Länge 1 der Preßgrube 1 ist so gewählt, daß die üblichen Rohrlängen, d.h. die Länge der Einzelstücke, aus denen die Rohre zusammengesetzt werden, zuzüglich der Vortriebsaggregate von der Preßgrube aufgenommen werden können.The length 1 of the press pit 1 is chosen so that the usual pipe lengths, i.e. the length of the individual pieces from which the pipes are assembled, plus the jacking units can be taken up by the press pit.

Fig. 3 zeigt eine beendigte Rohrverlegung unterhalb eines Wattgebietes 9, des mit dar erfindungsgemäßen Einrichtung zur Gänze unterfahren werden kann, ohne daß umweltschädliche Aufbrüche nach oben hin vorgenommen werden müssen.Fig. 3 shows a completed pipe laying below a mudflats 9, which can be completely underrun with the device according to the invention without having to make environmentally harmful upheavals.

Das oberhalb des Wattgebietes auflaufende Wasser 10 wird damit ebenso geschützt wie die Meeresflora und -fauns.The water 10 running above the mudflats is protected as well as the marine flora and fauna.

Die in Fig. 3 vorgenommenen Maßangaben lassen erkennen, in welchen großen Spennweiten mit der erfindungsgemäßen Anordnung und dem erfindungegemäßen Verfahren gearbeitet werden kann.The dimensions given in FIG. 3 show the large spans in which the arrangement according to the invention and the method according to the invention can be used.

Bei der Ausführungsform nach Fig. 3 hatte des jeweils nächste Hilfsrohr immer eine solche Länge, daß, wie aus Fig. 3 ersichtlich, jedes Hilfsrohr vom jeweiligen linken Ende in Fig. 3 bis zur Preßgrube 1 reichte. Die Nachteile der sich dadurch ergebenden Materialanhäufung wurden oben beschrieben.In the embodiment according to FIG. 3, the next auxiliary tube always had a length such that, as can be seen from FIG. 3, each auxiliary tube reached from the respective left end in FIG. 3 to the press pit 1. The disadvantages of the resulting material accumulation have been described above.

Fig. 4 zeigt nun eine Ausführungsform, bei welcher die Materialanhäufung vermieden wird, indem die einzelnen Hilfsrohre 81, 91, 101 und 111 nur so weit ineinandergesteckt sind, wie es für eine Stabilität der Anordnung erforderlich ist. Um bei dieser Anordnung das Einfädeln zu erleichtern, können die preßgrubenseitigen Enden der einzelnen Hilfsrohre mit Abschrägungen 12 oder dergleichen versehen sein.4 now shows an embodiment in which the material accumulation is avoided by the individual auxiliary tubes 81, 91, 101 and 111 being inserted into one another only as far as is necessary for the stability of the arrangement. In order to facilitate threading in this arrangement, the ends of the individual auxiliary tubes on the press pit side can be provided with bevels 12 or the like.

Fig. 5 zeigt eine Ausführungsform zur Einbringung der einzelnen kurzen Rohrabschnitte noch Fig. 4. Bei dem Anwendungsbeispiel nach Fig. 5 sind Druckrohre 14 vorgesehen, die von dem Druckring 2 (vgl. Fig. 1) in der beschriebenen Weise beaufschlagt werden und damit die jeweils letzten Rohretücke 101 in ihre Position gemäß Fig. 4 bringen. Die schon eingebrachten Rohrabschnitte 81 und 91 sind in Fig. 5 gegenüber ihren tatsächlichen Abmessungen stark verzerrt dargestellt.FIG. 5 shows an embodiment for introducing the individual short pipe sections. FIG. 4. In the application example according to FIG. 5, pressure pipes 14 are provided which are acted upon by the pressure ring 2 (cf. FIG. 1) in the manner described and thus the bring each last pipe section 101 into its position according to FIG. 4. The pipe sections 81 and 91 which have already been introduced are shown in FIG. 5 in a highly distorted manner compared to their actual dimensions.

Claims (8)

Verfahren zur unterirdischen Einbringung von Transportrohren größerer Länge in das Erdreich, bei welchem ein die Medien leitenden aus hintereinander angeordneten Einzelstücken zusammengesetztes Medien- oder Produktenrohr von einer Preßgrube aus mittels einer hydraulischen, pneumatischen oder mechanischen Preßvorrichtung in im wesentlichen horizontaler Richtung in das Erdreich eingepreßt wird, dadurch gekennzeichnet, daß in das Erdreich (8) mittels der Preßvorrichtung (2) Hilfsrohre (11 bis 61) eingebracht werden, die aus einzelnen teleskopartig ineinander eingreifenden Abschnitten bestehen, wobei der jeweilige Ausgangsabschnitt (11) eine Länge hat, die derjenigen Länge entspricht, die mit wirtschaftlichen und optimalen Bedingungen gemäß dem bisherigen Stand der Technik erreichbar ist, während der jeweils folgende Abschnitt (21 bis 71) eine Länge hat, die den jeweils vorangehenden Abschnitt (11 bis 61) um jene Ausgengslänge überragt, wobei das Medien- oder Produktenrohr (71) in einen Strang von auf diese Weise zusammengesetzten Hilfsrohren (11 bis 61) eingreift und dann seinerseits den jeweiligen letzten Hilfsrohrabschnitt (61) um diese Ausgangslänge überregt.Method for the underground introduction of transport pipes of greater length into the earth, in which a media or product pipe, which conducts the media and is composed of individual pieces arranged one behind the other, is pressed into the soil in a substantially horizontal direction by means of a hydraulic, pneumatic or mechanical press device, characterized in that auxiliary pipes (11 to 61) are introduced into the soil (8) by means of the pressing device (2), said sections consisting of individual telescoping sections, the respective output section (11) having a length which corresponds to that length, those with economic and optimal conditions can be achieved according to the prior art, while the following section (21 to 71) has a length that projects beyond the preceding section (11 to 61) by that length, the media or product tube (71) engages in a string of auxiliary pipes (11 to 61) assembled in this way and then in turn overexcurs the respective last auxiliary pipe section (61) by this initial length. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zunächst ein erstes Hilfsrohr (11) in das Erdreich (8) eingebracht wird, welches die obengenannte Ausgangslänge hat und mit dessen Einbringung die Leistung der Preßvorrichtung (2) optimal ausgenutzt wird, worauf der Bohrkopf durch das erste Hilfsrohr (11) zurückgezogen und das Bohrgut und der Boden mittels eines Schneckenförderers oder anderer Bohrhilfsmittel entfernt wird, worauf der zweite Hilfsrohrabschnitt (21) in den ersten Hilferohrabschnitt (11) eingebracht wird und wobei der Außendurchmesser des zweiten Hilfsrohrabschnittes (21) dem Innendurchmesser das ersten Hilfsrohrabschnittes (11) derart angepaßt ist, daß beide Hilfsrohrabschnitte (11,21) mit einem ausreichenden Toleranzbereich ineinandergreifen, so daß der zweite Hilferohrabschnitt (21) im ersten (11) leicht gleiten kann.A method according to claim 1, characterized in that first a first auxiliary pipe (11) is introduced into the soil (8), which has the above-mentioned initial length and with the introduction of which the power of the pressing device (2) is optimally used, whereupon the drill head is pressed through the the first auxiliary pipe (11) is withdrawn and the drilling material and the soil are removed by means of a screw conveyor or other drilling aids, whereupon the second auxiliary pipe section (21) is introduced into the first auxiliary pipe section (11) and the outer diameter of the second auxiliary pipe section (21) is the inner diameter the first auxiliary pipe section (11) is adapted such that both auxiliary pipe sections (11, 21) interlock with a sufficient tolerance range so that the second auxiliary pipe section (21) can slide easily in the first (11). Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der zweite Hilfsrohrabschnitt (21) etwa die doppelte Länge wie der erste Hilfsrohrabschnitt (11) hat, wobei der zweite Hilfsrohrabschnitt (21), nachdem er den ersten Hilfsrohrabschnitt (11) durchgriffen hat, mit seinem vorderen Ende in das Erdreich (8) eingeführt wird.A method according to claim 2, characterized in that the second auxiliary pipe section (21) has approximately twice the length as the first auxiliary pipe section (11), the second auxiliary pipe section (21) having passed through the first auxiliary pipe section (11) with its front one End is introduced into the soil (8). Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die weiteren Hilfsrohrabschnitte eingebracht werden, indem sie stets in den jeweils zuvor eingebrachten Hilfsrohrabschnitt eingreifen, wobei sie jeweils den vorangehenden Hilfsrohrabschnitt um etwa die Ausgangslänge des ersten Hilfsrohrabschnittes (11) überragen.Method according to Claim 3, characterized in that the further auxiliary tube sections are introduced by always engaging in the respective previously inserted auxiliary tube section, each projecting beyond the preceding auxiliary tube section by approximately the initial length of the first auxiliary tube section (11). Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die einzelnen Hilfsrohrabschnitte (11 bis 61) von ihrer Stirnseite her aus der Preßgrube (1) heraus mit der dortigen Preßvorrichtung (2) beaufachlagt werden wie die bisherigen einstückigen Produktenrohre.Method according to one of the preceding claims, characterized in that the individual auxiliary pipe sections (11 to 61) are acted upon from their end face out of the press pit (1) with the press device (2) there like the previous one-piece product pipes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die einzelnen Hilfsrohrabschnitte (81, 91) etwa die gleiche Länge haben, die derjenigen Länge entspricht, die mit wirtschaftlichen und optimalen Bedingungen gemäß dem bisherigen Stand der Technik erreichbar ist, wobei die aufeinanderfolgenden Hilfsrohrabschnitte (81, 91, 101, 111) unterschiedliche Durchmesser haben, so daß die jeweils vorangehenden Hilfsrohrabschnitte die nachfolgenden Hilfsrohrabschnittsenden aufnehmen können, wobei sich die aneinander anschliessenden Hilfsrohrabschnittsenden nur geringfügig, nämlich so weit überlappen, wie es zur Stabilität der Verbindung notwendig ist, und wobei jeweils ein Druck- oder Stützrohr (14), das zwischen das preßdruckseitige Ende des vorangehenden Hilfsrohrabschnittes und die Preßvorrichtung eingesetzt ist, vorgesehen ist, dessen Außendurchmesser jeweils dem Außendurchmesser des jeweiligen zu beaufschlagenden Hilfsrohrabschnittes entspricht und auf welches die Preßvorrichtung wirkt.A method according to claim 1, characterized in that the individual auxiliary pipe sections (81, 91) have approximately the same length, which corresponds to that length which with economic and optimal conditions according to the previous state The technology is achievable, the successive auxiliary pipe sections (81, 91, 101, 111) having different diameters, so that the respective preceding auxiliary pipe sections can accommodate the subsequent auxiliary pipe section ends, the adjoining auxiliary pipe section ends only overlapping slightly, namely as far as possible is necessary for the stability of the connection, and in each case a pressure or support tube (14), which is inserted between the pressure-pressure end of the preceding auxiliary tube section and the pressing device, is provided, the outer diameter of which corresponds in each case to the outer diameter of the respective auxiliary tube section to be acted upon and onto which the pressing device works. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die preßgrubenseitigen Enden der einzelnen Hilfsrohrabschnitte (81, 91, 101, 111) mit inneren Abschrägungen (12) zur Erleichterung der Aufnahme der jeweils folgenden Hilfsrohrabschnittsenden versehen sind.Method according to Claim 6, characterized in that the ends of the individual auxiliary tube sections (81, 91, 101, 111) on the press pit side are provided with internal bevels (12) to facilitate the reception of the respective subsequent auxiliary tube section ends. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Druck- oder Stützrohre (14) eine Länge haben, die etwa der Länge der einzelnen Hilfsrohrabschnitte (81, 91, 101, 111) entspricht.Method according to claim 6 or 7, characterized in that the pressure or support tubes (14) have a length which corresponds approximately to the length of the individual auxiliary tube sections (81, 91, 101, 111).
EP93111837A 1992-07-28 1993-07-23 Method and device for underground introduction of long transport pipes into the earth Expired - Lifetime EP0583650B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4224831 1992-07-28
DE4224831A DE4224831A1 (en) 1992-07-28 1992-07-28 Method and device for the underground introduction of transport pipes of greater length into the ground

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EP0583650A1 true EP0583650A1 (en) 1994-02-23
EP0583650B1 EP0583650B1 (en) 1997-01-15

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AT (1) ATE147831T1 (en)
DE (2) DE4224831A1 (en)
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WO2001025588A1 (en) * 1999-10-01 2001-04-12 Ludwig Pfeiffer Hoch- Und Tiefbau Gmbh & Co. Kg Method and device for construction of an underground pipe duct
WO2005100732A1 (en) * 2004-04-13 2005-10-27 Harald Strand A telescopic conductor casing for a well installation and a method of driving same into the underground
CN110397789A (en) * 2019-07-08 2019-11-01 中铁创通建设集团有限公司 Artificial push pipe guiding pricker auxiliary device and its application method

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DE19745130A1 (en) * 1997-10-13 1999-04-15 Ruhrgas Ag Method for laying a line and line with a jacket pipe and a product pipe

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WO2001025588A1 (en) * 1999-10-01 2001-04-12 Ludwig Pfeiffer Hoch- Und Tiefbau Gmbh & Co. Kg Method and device for construction of an underground pipe duct
WO2005100732A1 (en) * 2004-04-13 2005-10-27 Harald Strand A telescopic conductor casing for a well installation and a method of driving same into the underground
CN110397789A (en) * 2019-07-08 2019-11-01 中铁创通建设集团有限公司 Artificial push pipe guiding pricker auxiliary device and its application method

Also Published As

Publication number Publication date
ATE147831T1 (en) 1997-02-15
EP0583650B1 (en) 1997-01-15
DK0583650T3 (en) 1997-07-21
NO932707L (en) 1994-01-31
NO305725B1 (en) 1999-07-12
NO932707D0 (en) 1993-07-27
DE4224831A1 (en) 1994-02-03
DE59305116D1 (en) 1997-02-27

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