EP2483522B1 - Boring element of a ground boring device - Google Patents

Boring element of a ground boring device Download PDF

Info

Publication number
EP2483522B1
EP2483522B1 EP10763607.8A EP10763607A EP2483522B1 EP 2483522 B1 EP2483522 B1 EP 2483522B1 EP 10763607 A EP10763607 A EP 10763607A EP 2483522 B1 EP2483522 B1 EP 2483522B1
Authority
EP
European Patent Office
Prior art keywords
transmitter
drilling
receptacle
drilling element
element according
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.)
Active
Application number
EP10763607.8A
Other languages
German (de)
French (fr)
Other versions
EP2483522A2 (en
Inventor
Franz-Josef Püttmann
Peter Grass
Gerhard Völkel
Andreas Riekes
Frank Prutti
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.)
Tracto Technik GmbH and Co KG
Original Assignee
Tracto Technik GmbH and Co KG
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 Tracto Technik GmbH and Co KG filed Critical Tracto Technik GmbH and Co KG
Publication of EP2483522A2 publication Critical patent/EP2483522A2/en
Application granted granted Critical
Publication of EP2483522B1 publication Critical patent/EP2483522B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • E21B47/017—Protecting measuring instruments
    • 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
    • E21B7/04—Directional drilling
    • E21B7/046—Directional drilling horizontal drilling

Definitions

  • the invention relates to a drilling element of a Erdbohrvorraum with a housing and arranged in a receptacle of the housing transmitter.
  • HorizontalDbohrvoriquesen are known in which a front of a drill pipe arranged drill head is propelled by means of a arranged in a pit, a shaft or on the earth's surface driving and rotating rotating through the soil.
  • a controllability in such a horizontal drilling device is achieved in that the drill head is formed asymmetrically, for example with an oblique face, so that in a purely sliding, i. non-rotating driving of the drill head, a lateral force is generated, which leads to the desired lateral deflection of the drill head.
  • this lateral force is compensated on average by additionally driving the drill head in a uniformly rotating manner.
  • a drill head for such a rod-based horizontal drilling device is for example in the DE 195 34 806 A1 disclosed.
  • This includes a designated as a steering head inclined drilling head and an adjoining housing, in which a receptacle is provided for a transmitter.
  • the housing is provided with an external thread, with which this can be screwed to a first rod section of the drill string.
  • the transmitter is movably mounted within the receptacle of the cylindrical housing in its longitudinal axial direction and abuts with its two ends to a respective buffer, which serve to the generated by the exertion of the blows on the drill string relative movement of the transmitter within the receptacle of the housing dampen. In this way, the amount of force pulses acting on the transmitter, can be significantly reduced, which is necessary insofar as it is regularly in such a transmitter is a sensitive electronic component.
  • a structurally similar integration of a transmitter in an earth rocket is for example from the DE 198 23 629 A1 known. It is intended to retrofit an earth rocket with a drill head, in which the transmitter is integrated. There is also provided to embed the transmitter in the corresponding receptacle in the drill bit of Bohrkopfaufsatzes end between two damping elements.
  • EP 0 759 498 A2 discloses an arrangement of a shock sensitive transmitter in a drilling rig.
  • the transmitter is held by means of at least one shock-absorbing buffer at least in the main direction of impact with distance from the wall of a chamber in the drill.
  • the transmitter occupies a defined position relative to a housing, which does not change during operation.
  • EP 0 361 805 A1 discloses an earth boring device in which a probe is provided for locating the earth boring device. The probe is placed firmly between two shock-absorbing buffers.
  • the ram boring device comprises a device housing, inside which there is a sensor which forms a structural unit with a transmitter.
  • the assembly of sensor and transmitter is fixedly mounted with its front end via a Torsions rejoin with a connecting pin to a damping tube and a damping buffer in the device housing.
  • EP 0 617 193 A1 discloses a ram boring machine with a transmitter that can be protected by suitable damping elements against axial or radial vibrations and shocks.
  • a bore is formed, which serves to receive the transmitter, which can be protected by suitable damping elements both in the axial and in the radial direction against vibrations and shocks.
  • the transmitter is thus embedded in damping elements.
  • WO 02/35049 A1 discloses a steerable ground rocket equipped with a probe and roll sensors, the probe being firmly embedded in a chamber via buffers against the impact of the propulsion unit of the ground rocket.
  • the invention therefore an object of the invention to provide an improved integration of a transmitter in a Erdbohrvorraum.
  • the essence of the invention lies in further reducing the height of the forces transmitted to the transmitter from a housing of the earth boring device into which the transmitter is integrated, in that the latter is suspended in an exclusively elastic-damping manner by pulling.
  • the transmitter is connected within a receptacle of a housing of a drilling element of a Erdbohrvorraum in which it is movably mounted in the longitudinal axial direction (of the drilling element) via a front-side buffer to the housing, that the transmitter in a rear impact on the drilling element undergoes a backward displacement in the receptacle, made possible by a deformation of the buffer, without this striking directly against an element of the drilling element.
  • a "drilling element" of an earth boring device can be any component of an earth boring device into which a transmitter can be integrated.
  • a “buffer” is a component that transforms the kinetic energy of a connected component (in this case the transmitter) by deformation, thereby reducing the amount of transmitted forces.
  • a buffer can be designed exclusively as a spring element and also exclusively as a damping element.
  • a buffer according to the invention is a combined spring-damper element.
  • front side or “forward” is understood according to the invention to mean a location that is different from the respective element in the direction of the drill front and consequently extends the front of the Erdbohrvorraum. Accordingly, “backward” or “backwards” refers to a direction that extends from the drilling front or the front of the earth boring device in the direction of the already created bore.
  • this is designed as a drill head. It can thereby be achieved that the transmitter, which is arranged in a receptacle of the housing of the drilling element, is arranged as far as possible at the front end of the Erdbohrvorraum, whereby the positioning accuracy can be improved.
  • the drilling element according to the invention can be provided to provide an additional back buffer, which is arranged so that the transmitter deforms this only after a defined backward displacement in the receptacle (which can be very small).
  • the back buffer may then be used, for example. act by damping a damping when unexpectedly high impact forces are exerted on the drilling element, which lead to a correspondingly high displacement of the transmitter in the recording.
  • the drilling element according to the invention may further comprise an integrated into the drilling element power supply for the transmitter.
  • This can prevent the transmitter from having to be connected to an external power supply via an electrically conductive connection.
  • Such a connection to an external power supply has frequently been found to be susceptible to interference in the earth boring devices known from the prior art.
  • An integrated power supply for the transmitter can preferably be done via batteries, with other possibilities for power supply are possible.
  • a turbine driven by a drilling fluid or by compressed air may be connected to a generator which generates the corresponding energy for the operation of the transmitter.
  • the receptacle in the housing of the drilling element is accessible from the outside, so that the transmitter and possibly also the power supply can be used and replaced again without having to disassemble the auger itself.
  • the opening required for accessibility in the housing of the drilling element is preferably closable by means of a closure element.
  • the closure element is easily fixable and detachable, whereby maintenance work on the transmitter and the preferably provided integrated power supply can be simplified.
  • a particularly preferred embodiment can be provided to form the receptacle as a front hole in the drilling element. This can be avoided be that an opening in the shell of the drilling element must be introduced.
  • a sealing plug may preferably be provided as a closure element, which is further preferably held by clamping in the bore. This can be done for example by means of a conical sealing plug, which in turn is held in a corresponding conical receiving the bore. The reaction forces of the soil acting on the sealing plug during drilling press on the sealing plug, which is thus pressed into the bore; the clamping fixation of the drilling plug in the bore is thereby supported.
  • At least the closure element, the buffer and the transmitter are connected to each other, so that they can be introduced as a transmitter unit in the drilling element and also removed from this again.
  • the assembly and disassembly of the transmitter unit is considerably simplified during maintenance. If an integrated power supply and / or a back buffer are provided, these may preferably also be integrated in the transmitter unit.
  • FIG. 1 and 2 an inventive drill head is shown in a first embodiment.
  • This drill head is intended to be used as part of an earth rocket, including this with a housing of the Erdrakete (not shown) is screwed.
  • the drill head comprises a cylindrical housing 1, which is designed in two parts, wherein the two housing parts are displaceable in the longitudinal axial direction over a certain distance from each other.
  • a front housing part 2 is displaceably mounted on a rear housing part 3, wherein this bearing is sealed by a sealing ring 4.
  • a piston 5, which is connected via a total of four transverse pins 6, which can be inserted through corresponding openings in the housing, with the front housing part 2 extends.
  • the bearing of the piston 5 within the rear Housing part 3 is also designed to be displaceable in the longitudinal axial direction, wherein the rear housing part 3 and the piston 5 are supported by a cylindrical coil spring 7 against each other.
  • the rear housing part further has an external thread 8, with which the drill head can be screwed into a corresponding internal thread of the Erdraketengephaseuses.
  • the free end of the piston 5 projects into a striking space of the earth rocket, in which a percussion piston driven in a known manner by means of compressed air is driven in a cyclical back-and-forth motion.
  • the forward stroke of the percussion piston is thereby slowed down and terminated, that this impinges on the free end of the piston 5 and accelerates it in the direction forward.
  • This acceleration of the piston 5 is transmitted directly to the front housing part 2 of the drill head, whereby this creates the hole step by step.
  • the front housing part 2 of the drill head consists of a first, designated as a drill mandrel portion 10, which has a substantially constant outer diameter. This is followed by a conical widening section 11 formed in a stepped shape, which serves to widen the borehole 10 predrilled bore to the desired diameter.
  • the drill mandrel 10 is hollow and thus forms a receptacle for a transmitter 12, by means of which the drill head can be located by means of a arranged on the earth surface receiving unit (not shown).
  • the transmitter 12 which likewise has a cylindrical shape, is in principle mounted slidably in the receptacle in the longitudinal axial direction (of the drill head and of the transmitter 12), for which purpose a guide bush 13 is integrated into the drill mandrel 10 whose material is chosen such that it on the one hand causes no or only a small shielding of the signals emitted by the transmitter 12 and on the other hand has only a small coefficient of friction with the material of the transmitter 12.
  • the transmitter 12 is connected via a fixing sleeve 14 with a front buffer 15. This is also movably mounted in a portion of the receptacle within the drill mandrel 10. On the opposite end of the fixing sleeve 14 of the front-side buffer 15, this is connected to a sealing plug 16, which closes the front opening of the drill mandrel 10.
  • the impact forces transmitted by the percussion piston of the rocket to the piston 5, from there to the front housing part 2 of the drill head and from there to the closure plug 16 are transmitted further to the transmitter 12 via the front buffer 16 and the fixing sleeve 14, these being tensile forces to act on this; this is thus pulled pulling.
  • the amount of these tensile forces is reduced by the fact that the front-side buffer 15 is deformed under the action of the forward-acting impact forces and the inertial forces of the transmitter 12 and partially converts these into potential forces and into heat. As a result, force peaks can be prevented, which could lead to damage to the transmitter 12.
  • the drill head according to the invention is further provided with a rear buffer 17, which is arranged in the unloaded state of the drill head in a defined, albeit very small distance from the rear end of the transmitter 12.
  • a rear buffer 17 which is arranged in the unloaded state of the drill head in a defined, albeit very small distance from the rear end of the transmitter 12.
  • a battery 18, which serves as an internal power supply for the transmitter This is on the one hand via a first cylindrical coil spring 19 to the transmitter 12 and on the other hand - also via a second cylindrical coil spring 20 and an additional battery buffer 21 - supported on the existing of an electrically conductive material fixing sleeve 14.
  • the cylindrical coil springs 19, 20 serve as additional buffer elements and also as contact elements, by which a circuit is formed by incorporating the electrically conductive fixing sleeve 14.
  • the sealing plug 16, the front buffer 15, the fixing sleeve 14 and the transmitter 12 are connected to each other so that they can be used as a transmitter unit through the front opening in the receptacle of the drill mandrel 10 and removed again.
  • the integrated between the Fixerhülse 14 and the transmitter 12 power supply is also part of the transmitter unit.
  • the sealing plug 16 is formed with a (in the installed state in the rearward direction) conically tapered portion which is inserted into a correspondingly conically widening portion of the receptacle of the drill mandrel.
  • This connection between the sealing plug 16 and the reaming mandrel 10 leads to a clamping connection between these two elements, by the of the Soil is reinforced on the front side of the stopper 16 acting resistance forces. An unwanted loosening of the sealing plug 16 and the associated elements of the transmitter unit can be avoided.
  • An unintentional loosening of the sealing plug (eg during handling prior to introduction into the soil) can additionally be effected by a (not shown) dowel pin, which is introduced into a transverse bore 22, which passes through the sealing plug 16 and the front portion of the drill mandrel 10 ,
  • a loosening of the sealing plug 16 can be effected by means of a tool which engages in the groove formed between the sealing plug 16 and the annular end face of the drill mandrel 10.
  • the drill mandrel In the area of the transmitter, the drill mandrel is provided with a total of four longitudinal openings 23, which are filled with a plastic, which is characterized in that it does not or only weakly shield the signals emitted by the transmitter. This plastic filling prevents clogging of the longitudinal openings 23 with soil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (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)
  • Geophysics (AREA)
  • Earth Drilling (AREA)
  • Geophysics And Detection Of Objects (AREA)

Description

Die Erfindung betrifft ein Bohrelement einer Erdbohrvorrichtung mit einem Gehäuse und einem in einer Aufnahme des Gehäuses angeordneten Sender.The invention relates to a drilling element of a Erdbohrvorrichtung with a housing and arranged in a receptacle of the housing transmitter.

Es ist bekannt, Erdbohrvorrichtungen mit einem Sender zu versehen, um die von dem Sender ausgesendeten Signale mittels einer an der Erdoberfläche angeordneten Empfangseinheit zu lokalisieren und dadurch die Position der Erdbohrvorrichtung innerhalb des Erdreichs zu bestimmen. Dadurch wird ermöglicht, den Verlauf der Bohrung kontinuierlich zu überprüfen und - sofern es sich um eine steuerbare Erdbohrvorrichtung handelt - bei einer Abweichung von dem Soll-Verlauf den Bohrverlauf durch eine Umsteuerung der Erdbohrvorrichtung zu korrigieren.It is known to provide earth boring devices with a transmitter for locating the signals emitted by the transmitter by means of a receiving unit located at the surface of the earth, thereby determining the position of the earth boring device within the soil. This makes it possible to continuously check the course of the bore and - if it is a controllable Erdbohrvorrichtung - to correct the bore course by a reversal of the Erdbohrvorrichtung in a deviation from the desired course.

Im Stand der Technik sind verschiedene Ausführungsformen steuerbarer Erdbohrvorrichtungen bekannt. Für das Einbringen von Horizontalbohrungen in das Erdreich, das heißt solchen Bohrungen, die im Wesentlichen in oberflächennahen Erdschichten in horizontaler Richtung verlaufen, werden häufig sogenannte Erdraketen eingesetzt. Hierbei handelt es sich um selbstgetriebene Schlagbohrgeräte, die mit einem mit Druckluft betriebenen Schlagwerk ausgerüstet sind und über einen rückseitigen Versorgungsschlauch mit der hierfür benötigten Antriebsdruckluft versorgt werden. Eine Steuerbarkeit einer solchen Erdrakete kann beispielsweise durch eine Verstellung der Bohrkopfspitze erreicht werden, wodurch eine seitliche Ablenkung erzeugt wird, die zu einem bogenförmigen Bohrverlauf führt. Eine solche steuerbare Erdrakete ist beispielsweise in der DE 199 47 645 C1 offenbart.In the prior art, various embodiments of controllable Erdbohrvorrichtungen known. For the introduction of horizontal wells in the ground, that is, such holes, which extend substantially in shallow layers of soil in the horizontal direction, so-called ground rockets are often used. These are self-propelled impact drills, which are equipped with a percussion driven air-operated unit and are supplied with the required compressed air supply via a rear supply hose. A controllability of such Erdrakete can be achieved for example by an adjustment of the drill head tip, whereby a lateral deflection is generated, which leads to an arcuate Bohrverlauf. Such a controllable Erdrakete is for example in the DE 199 47 645 C1 disclosed.

Weiterhin sind Horizontalerdbohrvorrichtungen bekannt, bei denen ein frontseitig an einem Bohrgestänge angeordneter Bohrkopf mittels einer in einer Baugrube, einem Schacht oder an der Erdoberfläche angeordneten Antriebsvorrichtung schiebend und rotierend durch das Erdreich vorgetrieben wird. Eine Steuerbarkeit bei einer solchen Horizontalbohrvorrichtung wird dadurch erzielt, dass die Bohrkopf asymmetrisch, beispielsweise mit einer schrägen Stirnfläche, ausgebildet ist, sodass bei einem rein schiebenden, d.h. nicht-rotierenden Vortreiben des Bohrkopfs eine Seitenkraft erzeugt wird, die zu der gewünschten seitlichen Ablenkung des Bohrkopfs führt. Für ein geradliniges Bohren wird diese Seitenkraft im Mittel kompensiert, indem der Bohrkopf zusätzlich gleichmäßig rotierend angetrieben wird.Furthermore, HorizontalDbohrvorrichtungen are known in which a front of a drill pipe arranged drill head is propelled by means of a arranged in a pit, a shaft or on the earth's surface driving and rotating rotating through the soil. A controllability in such a horizontal drilling device is achieved in that the drill head is formed asymmetrically, for example with an oblique face, so that in a purely sliding, i. non-rotating driving of the drill head, a lateral force is generated, which leads to the desired lateral deflection of the drill head. For straightforward drilling, this lateral force is compensated on average by additionally driving the drill head in a uniformly rotating manner.

Auch bei einer solchen gestängebasierten Horizontalbohrvorrichtung kann vorgesehen sein, den Bohrvortrieb des Bohrkopfs durch ein Ausüben von Schlägen zu unterstützen. Dies kann - so wie bei einer Erdrakete - durch in internes Schlagwerk erfolgen; regelmäßig ist jedoch vorgesehen, die Schläge von einem externen Schlagwerk erzeugen zu lassen und diese über das Bohrgestänge auf den Bohrkopf zu übertragen. Dadurch kann vermieden werden, ein Schlagwerk in den häufig in seinen Abmessungen begrenzten Bohrkopf integrieren zu müssen.Even with such a rod-based horizontal drilling device can be provided to assist the Bohrvortrieb the drill head by exerting blows. This can be done - as in a Erdrakete - by internal Schlagwerk; However, it is regularly provided to have the blows generated by an external impact mechanism and to transmit these to the drill head via the drill string. This can avoid having to integrate a hammer mechanism in the often limited in size drill head.

Ein Bohrkopf für eine solche gestängebasierte Horizontalbohrvorrichtung ist beispielsweise in der DE 195 34 806 A1 offenbart. Dieser umfasst einen als Lenkkopf bezeichneten Schrägbohrkopf und ein sich daran anschließendes Gehäuse, in dem eine Aufnahme für einen Sender vorgesehen ist. An dem dem Schrägbohrkopf gegenüber liegenden Ende ist das Gehäuse mit einem Außengewinde versehen, mit dem dieses mit einem ersten Gestängeschuss des Bohrgestänges verschraubt werden kann. Der Sender ist innerhalb der Aufnahme des zylindrischen Gehäuses in dessen längsaxialer Richtung beweglich gelagert und liegt mit seinem beiden Enden an jeweils einem Puffer an, die dazu dienen, die durch die Ausübung der Schläge auf das Bohrgestänge erzeugte Relativbewegung des Senders innerhalb der Aufnahme des Gehäuses zu dämpfen. Auf diese Weise kann die Höhe der Kraftimpulse, die auf den Sender wirken, erheblich reduziert werden, was insoweit erforderlich ist, da es sich bei einem solchen Sender regelmäßig um ein empfindliches elektronisches Bauteil handelt.A drill head for such a rod-based horizontal drilling device is for example in the DE 195 34 806 A1 disclosed. This includes a designated as a steering head inclined drilling head and an adjoining housing, in which a receptacle is provided for a transmitter. At the opposite end of the oblique drill head, the housing is provided with an external thread, with which this can be screwed to a first rod section of the drill string. The transmitter is movably mounted within the receptacle of the cylindrical housing in its longitudinal axial direction and abuts with its two ends to a respective buffer, which serve to the generated by the exertion of the blows on the drill string relative movement of the transmitter within the receptacle of the housing dampen. In this way, the amount of force pulses acting on the transmitter, can be significantly reduced, which is necessary insofar as it is regularly in such a transmitter is a sensitive electronic component.

Eine konstruktiv ähnliche Integration eines Senders in eine Erdrakete ist beispielsweise aus der DE 198 23 629 A1 bekannt. Darin ist vorgesehen, eine Erdrakete mit einem Bohrkopfaufsatz nachzurüsten, in den der Sender integriert ist. Auch dort ist vorgesehen, den Sender in der entsprechenden Aufnahme in dem Bohrmeißel des Bohrkopfaufsatzes endseitig zwischen zwei Dämpfungselementen einzubetten.A structurally similar integration of a transmitter in an earth rocket is for example from the DE 198 23 629 A1 known. It is intended to retrofit an earth rocket with a drill head, in which the transmitter is integrated. There is also provided to embed the transmitter in the corresponding receptacle in the drill bit of Bohrkopfaufsatzes end between two damping elements.

Bei den aus dem Stand der Technik bekannten Erdbohrvorrichtungen mit integriertem Sender hat sich gezeigt, dass bei diesen nicht immer eine ausreichende Verringerung der Stoßbelastung der Sender erzielt werden kann und diese folglich durch den Betrieb der schlagenden Erdbohrvorrichtung beschädigt werden.It has been found in prior art earth boring devices with integrated transmitters that it is not always possible to achieve a sufficient reduction of the impact load of the transmitters and that these are consequently damaged by the operation of the striking earth boring device.

EP 0 759 498 A2 offenbart eine Anordnung eines stoßempfindlichen Senders in einem Bohrgerät. Der Sender ist mittels wenigstens eines stoßdämpfenden Puffers wenigstens in der Hauptstoßrichtung mit Abstand von der Wandung einer Kammer im Bohrgerät gehalten. Der Sender nimmt gegenüber einem Gehäuse eine definierte Lage ein, die sich im Betrieb nicht verändert. EP 0 759 498 A2 discloses an arrangement of a shock sensitive transmitter in a drilling rig. The transmitter is held by means of at least one shock-absorbing buffer at least in the main direction of impact with distance from the wall of a chamber in the drill. The transmitter occupies a defined position relative to a housing, which does not change during operation.

EP 0 361 805 A1 offenbart eine Erdbohrvorrichtung, bei der eine Sonde zur Lokalisierung der Erdbohrvorrichtung vorgesehen ist. Die Sonde wird fest zwischen zwei stoßdämpfenden Puffern angeordnet. EP 0 361 805 A1 discloses an earth boring device in which a probe is provided for locating the earth boring device. The probe is placed firmly between two shock-absorbing buffers.

DE 199 10 292 A1 offenbart ein Verfahren und eine Vorrichtung zum Lenken eines Rammbohrgeräts. Das Rammbohrgerät umfasst ein Gerätegehäuse, in dessen Inneren sich ein Sensor befindet, der mit einem Sender eine Baueinheit bildet. Die Baueinheit aus Sensor und Sender ist mit ihrem vorderen Ende über eine Torsionssicherung mit einem Verbindungsstift zu einem Dämpfungsrohr und über einen Dämpfungspuffer im Gerätegehäuse fest gelagert. DE 199 10 292 A1 discloses a method and apparatus for steering a ram boring machine. The ram boring device comprises a device housing, inside which there is a sensor which forms a structural unit with a transmitter. The assembly of sensor and transmitter is fixedly mounted with its front end via a Torsionssicherung with a connecting pin to a damping tube and a damping buffer in the device housing.

EP 0 617 193 A1 offenbart ein Rammbohrgerät mit einem Sender, der durch geeignete Dämpfungselemente gegenüber axialen oder radialen Schwingungen und Schlägen geschützt werden kann. Im Rammbohrgerät ist eine Bohrung ausgebildet, die zur Aufnahme des Senders dient, der über geeignete Dämpfungselemente sowohl in axialer als auch in radialer Richtung gegen Schwingungen und Schläge geschützt werden kann. Der Sender ist damit in Dämpfungselemente eingebettet. EP 0 617 193 A1 discloses a ram boring machine with a transmitter that can be protected by suitable damping elements against axial or radial vibrations and shocks. In Rammbohrgerät a bore is formed, which serves to receive the transmitter, which can be protected by suitable damping elements both in the axial and in the radial direction against vibrations and shocks. The transmitter is thus embedded in damping elements.

WO 02/35049 A1 offenbart eine lenkbare Erdrakete, die mit einer Sonde und Rollsensoren ausgestattet ist, wobei die Sonde über Puffer fest gegen die Schlagwirkung der Vortriebseinheit der Erdrakete in einer Kammer eingebettet. WO 02/35049 A1 discloses a steerable ground rocket equipped with a probe and roll sensors, the probe being firmly embedded in a chamber via buffers against the impact of the propulsion unit of the ground rocket.

Ausgehend von diesem Stand der Technik lag der Erfindung demnach die Aufgabe zugrunde, eine verbesserte Integration eines Senders in eine Erdbohrvorrichtung anzugeben.Based on this prior art, the invention therefore an object of the invention to provide an improved integration of a transmitter in a Erdbohrvorrichtung.

Diese Aufgabe wird durch den Gegenstand des unabhängigen Patentanspruchs gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Patentansprüche und ergeben sich aus der nachfolgenden Beschreibung der Erfindung.This object is solved by the subject matter of the independent claim. Advantageous embodiments are the subject of the dependent claims and will become apparent from the following description of the invention.

Der Kern der Erfindung liegt darin, die Höhe der von einem Gehäuse der Erdbohrvorrichtung, in das der Sender integriert ist, auf den Sender übertragenen Kräfte dadurch weiter zu reduzieren, dass dieser ausschließlich ziehend elastisch-dämpfend aufgehängt wird. Dies wird dadurch erreicht, dass der Sender innerhalb einer Aufnahme eines Gehäuses eines Bohrelements einer Erdbohrvorrichtung, in der dieser in längsaxialer Richtung (des Bohrelements) beweglich gelagert ist, über einen vorderseitigen Puffer derart mit dem Gehäuse verbunden ist, dass der Sender bei einem rückseitigen Schlag auf das Bohrelement eine durch eine Verformung des Puffers ermöglichte, rückwärts gerichtete Verschiebung in der Aufnahme erfährt, ohne dass dieser direkt an ein Element des Bohrelements anschlägt.The essence of the invention lies in further reducing the height of the forces transmitted to the transmitter from a housing of the earth boring device into which the transmitter is integrated, in that the latter is suspended in an exclusively elastic-damping manner by pulling. This is achieved in that the transmitter is connected within a receptacle of a housing of a drilling element of a Erdbohrvorrichtung in which it is movably mounted in the longitudinal axial direction (of the drilling element) via a front-side buffer to the housing, that the transmitter in a rear impact on the drilling element undergoes a backward displacement in the receptacle, made possible by a deformation of the buffer, without this striking directly against an element of the drilling element.

Es konnte festgestellt werden, dass durch eine ausschließlich ziehend elastisch-dämpfende Aufhängung des Senders in dem Gehäuse des Bohrelements eine gegenüber der aus dem Stand der Technik bekannten beidseitigen Einbettung in zwei Dämpferelemente verbesserte Dämpfung der Schlagimpulse erreicht werden kann.It has been found that an attenuation of the impact pulses that is better than the two-sided embedding known from the prior art in two damper elements can be achieved by an exclusively pulling elastic-damping suspension of the transmitter in the housing of the drilling element.

Bei einem "Bohrelement" einer Erdbohrvorrichtung kann es sich um ein beliebiges Bauteil einer Erdbohrvorrichtung handeln, in das ein Sender integriert werden kann.A "drilling element" of an earth boring device can be any component of an earth boring device into which a transmitter can be integrated.

Bei einem "Puffer" handelt es sich um ein Bauteil, das durch eine Deformation die kinetische Energie eines damit verbundenen Bauteils (hier des Senders) wandelt und dadurch die Höhe der übertragenden Kräfte reduziert. Ein Puffer kann erfindungsgemäß sowohl ausschließlich als Federelement als auch ausschließlich als Dämpferelement ausgebildet sein. Vorzugsweise handelt es sich bei einem erfindungsgemäßen Puffer jedoch um ein kombiniertes Feder-Dämpferelement.A "buffer" is a component that transforms the kinetic energy of a connected component (in this case the transmitter) by deformation, thereby reducing the amount of transmitted forces. According to the invention, a buffer can be designed exclusively as a spring element and also exclusively as a damping element. Preferably, however, a buffer according to the invention is a combined spring-damper element.

Unter "vorderseitig" bzw. "nach vorne" wird erfindungsgemäß eine Ortsangabe verstanden, die sich von dem jeweiligen Element in Richtung der Bohrfront und folglich
der Front der Erdbohrvorrichtung erstreckt. Dementsprechend betrifft "rückseitig" bzw. nach hinten eine Richtung, die sich von der Bohrfront beziehungsweise der Front der Erdbohrvorrichtung in Richtung der bereits erstellten Bohrung erstreckt.The term "front side" or "forward" is understood according to the invention to mean a location that is different from the respective element in the direction of the drill front and consequently
extends the front of the Erdbohrvorrichtung. Accordingly, "backward" or "backwards" refers to a direction that extends from the drilling front or the front of the earth boring device in the direction of the already created bore.

In einer bevorzugten Ausführungsform des erfindungsgemäßen Bohrelements ist dieses als Bohrkopf ausgebildet. Dadurch kann erreicht werden, dass der Sender, der in einer Aufnahme des Gehäuses des Bohrelements angeordnet ist, möglichst weit am vorderen Ende der Erdbohrvorrichtung angeordnet ist, wodurch die Ortungsgenauigkeit verbessert werden kann.In a preferred embodiment of the drilling element according to the invention this is designed as a drill head. It can thereby be achieved that the transmitter, which is arranged in a receptacle of the housing of the drilling element, is arranged as far as possible at the front end of the Erdbohrvorrichtung, whereby the positioning accuracy can be improved.

In einer weiterhin bevorzugten Ausführungsform des erfindungsgemäßen Bohrelements kann vorgesehen sein, einen zusätzlichen rückseitigen Puffer vorzusehen, der so angeordnet ist, dass der Sender diesen erst nach einer definierten rückwärts gerichteten Verschiebung in der Aufnahme (die sehr klein sein kann) deformiert. Der rückseitige Puffer kann beispielweise dann zum Einsatz kommen, d.h. durch eine Deformation dämpfend wirken, wenn unerwartet hohe Schlagkräfte auf das Bohrelement ausgeübt werden, die zu einer entsprechend hohen Verschiebung des Senders in der Aufnahme führen.In a further preferred embodiment of the drilling element according to the invention can be provided to provide an additional back buffer, which is arranged so that the transmitter deforms this only after a defined backward displacement in the receptacle (which can be very small). The back buffer may then be used, for example. act by damping a damping when unexpectedly high impact forces are exerted on the drilling element, which lead to a correspondingly high displacement of the transmitter in the recording.

Das erfindungsgemäße Bohrelement kann weiterhin eine in das Bohrelement integrierte Energieversorgung für den Sender aufweisen. Dadurch kann verhindert werden, dass der Sender über eine elektrisch leitende Verbindung mit einer externen Energieversorgung verbunden werden muss. Eine solche Verbindung mit einer externen Energieversorgung hat sich bei den aus dem Stand der Technik bekannten Erdbohrvorrichtungen häufig als störanfällig gezeigt. Eine integrierte Energieversorgung für den Sender kann vorzugsweise über Batterien erfolgen, wobei auch andere Möglichkeiten zur Energieversorgung möglich sind. Beispielsweise kann eine über eine Bohrflüssigkeit oder auch über Druckluft angetriebene Turbine mit einem Generator verbunden sein, der die entsprechende Energie für den Betrieb des Senders erzeugt.The drilling element according to the invention may further comprise an integrated into the drilling element power supply for the transmitter. This can prevent the transmitter from having to be connected to an external power supply via an electrically conductive connection. Such a connection to an external power supply has frequently been found to be susceptible to interference in the earth boring devices known from the prior art. An integrated power supply for the transmitter can preferably be done via batteries, with other possibilities for power supply are possible. For example, a turbine driven by a drilling fluid or by compressed air may be connected to a generator which generates the corresponding energy for the operation of the transmitter.

Vorteilhafterweise kann vorgesehen sein, dass die Aufnahme in dem Gehäuse des Bohrelements von außen zugänglich ist, so dass der Sender und gegebenenfalls auch die Energieversorgung eingesetzt und wieder ausgetauscht werden können, ohne die Erdbohrvorrichtung selbst demontieren zu müssen. Die für die Zugänglichkeit erforderliche Öffnung in dem Gehäuse des Bohrelements ist dabei vorzugsweise mittels eines Verschlusselements verschließbar. Vorzugsweise ist das Verschlusselement auf einfache Weise fixierbar und wieder lösbar, wodurch Wartungsarbeiten an dem Sender und der vorzugsweise vorgesehenen integrierten Energieversorgung vereinfacht werden.Advantageously, it can be provided that the receptacle in the housing of the drilling element is accessible from the outside, so that the transmitter and possibly also the power supply can be used and replaced again without having to disassemble the auger itself. The opening required for accessibility in the housing of the drilling element is preferably closable by means of a closure element. Preferably, the closure element is easily fixable and detachable, whereby maintenance work on the transmitter and the preferably provided integrated power supply can be simplified.

In einer besonders bevorzugten Ausführungsform kann vorgesehen sein, die Aufnahme als frontseitige Bohrung in dem Bohrelement auszubilden. Dadurch kann vermieden werden, dass eine Öffnung in den Mantel des Bohrelements eingebracht werden muss.In a particularly preferred embodiment can be provided to form the receptacle as a front hole in the drilling element. This can be avoided be that an opening in the shell of the drilling element must be introduced.

Bei einer solchen frontseitigen Bohrung für die Aufnahme des Senders kann vorzugsweise ein Verschlussstopfen als Verschlusselement vorgesehen sein, der weiterhin bevorzugt klemmend in der Bohrung gehalten wird. Dies kann beispielsweise mittels eines konischen Verschlussstopfens erfolgen, der wiederum in einer korrespondierenden konischen Aufnahme der Bohrung gehalten wird. Die während des Bohrens auf den Verschlussstopfen wirkenden Reaktionskräfte des Erdreichs drücken dabei auf den Verschlussstopfen, der so in die Bohrung gedrückt wird; die klemmende Fixierung des Bohrstopfens in der Bohrung wir dadurch unterstützt.In such a front bore for receiving the transmitter, a sealing plug may preferably be provided as a closure element, which is further preferably held by clamping in the bore. This can be done for example by means of a conical sealing plug, which in turn is held in a corresponding conical receiving the bore. The reaction forces of the soil acting on the sealing plug during drilling press on the sealing plug, which is thus pressed into the bore; the clamping fixation of the drilling plug in the bore is thereby supported.

In einer weiterhin bevorzugten Ausführungsform kann vorgesehen sein, dass zumindest das Verschlusselement, der Puffer und der Sender miteinander verbunden sind, so dass diese als Sendereinheit in das Bohrelement eingebracht und auch wieder aus diesem entnommen werden können. Dadurch wird die Montage und Demontage der Sendereinheit im Rahmen von Wartungsarbeiten erheblich vereinfacht. Sofern eine integrierte Energieversorgung und/oder ein rückseitiger Puffer vorgesehen sind, können diese vorzugsweise ebenfalls in die Sendereinheit integriert sein.In a further preferred embodiment it can be provided that at least the closure element, the buffer and the transmitter are connected to each other, so that they can be introduced as a transmitter unit in the drilling element and also removed from this again. As a result, the assembly and disassembly of the transmitter unit is considerably simplified during maintenance. If an integrated power supply and / or a back buffer are provided, these may preferably also be integrated in the transmitter unit.

Die Erfindung wird nachfolgend anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert.The invention will be explained in more detail with reference to embodiments shown in the drawings.

In den Zeichnungen zeigt

Fig. 1:
einen erfindungsgemäßen Bohrkopf in einer isometrischen Ansicht; und
Fig. 2:
den Bohrkopf der Fig. 1 in einer geschnittenen Zeitenansicht.
In the drawings shows
Fig. 1 :
a drill head according to the invention in an isometric view; and
Fig. 2 :
the drill head of Fig. 1 in a cut times view.

In den Fig. 1 und 2 ist ein erfindungsgemäßer Bohrkopf in einer ersten Ausführungsform dargestellt. Dieser Bohrkopf ist vorgesehen, als Bestandteil einer Erdrakete eingesetzt zu werden, wozu dieser mit einem Gehäuse der Erdrakete (nicht dargestellt) verschraubt wird.In the Fig. 1 and 2 an inventive drill head is shown in a first embodiment. This drill head is intended to be used as part of an earth rocket, including this with a housing of the Erdrakete (not shown) is screwed.

Der Bohrkopf umfasst ein zylindrisches Gehäuse 1, das zweiteilig ausgeführt ist, wobei die beiden Gehäuseteile in längsaxialer Richtung über eine gewisse Distanz zueinander verschiebbar sind. Hierzu ist ein vorderer Gehäuseteil 2 verschiebbar auf einem hinteren Gehäuseteil 3 gelagert, wobei diese Lagerung durch einen Dichtring 4 abgedichtet ist. Durch den hinteren Gehäuseteil 3 und einen Abschnitt des vorderen Gehäuseteils 2 erstreckt sich ein Kolben 5, der über insgesamt vier Querbolzen 6, die durch entsprechende Öffnungen in dem Gehäuse einsteckbar sind, mit dem vorderen Gehäuseteil 2 verbunden ist. Die Lagerung des Kolbens 5 innerhalb des hinteren Gehäuseteils 3 ist ebenfalls in längsaxialer Richtung verschiebbar ausgeführt, wobei sich der hintere Gehäuseteil 3 und der Kolben 5 über eine zylindrische Schraubenfeder 7 gegeneinander abstützen.The drill head comprises a cylindrical housing 1, which is designed in two parts, wherein the two housing parts are displaceable in the longitudinal axial direction over a certain distance from each other. For this purpose, a front housing part 2 is displaceably mounted on a rear housing part 3, wherein this bearing is sealed by a sealing ring 4. Through the rear housing part 3 and a portion of the front housing part 2, a piston 5, which is connected via a total of four transverse pins 6, which can be inserted through corresponding openings in the housing, with the front housing part 2 extends. The bearing of the piston 5 within the rear Housing part 3 is also designed to be displaceable in the longitudinal axial direction, wherein the rear housing part 3 and the piston 5 are supported by a cylindrical coil spring 7 against each other.

Der hintere Gehäuseteil weist weiterhin ein Außengewinde 8 auf, mit dem der Bohrkopf in ein entsprechendes Innengewinde des Erdraketengehäuses eingeschraubt werden kann.The rear housing part further has an external thread 8, with which the drill head can be screwed into a corresponding internal thread of the Erdraketengehäuses.

Im montierten Zustand des Bohrkopfs ragt das freie Ende des Kolbens 5 in einen Schlagraum der Erdrakete, in dem ein auf bekannte Art und Weise mittels Druckluft angetriebener Schlagkolben in einer zyklischen Hin-und-Her-Bewegung angetrieben wird. Der Vorwärtshub des Schlagkolbens wird dadurch abgebremst und beendet, dass dieser auf das freie Ende des Kolbens 5 auftrifft und diesen in Richtung nach vorne beschleunigt. Diese Beschleunigung des Kolbens 5 wird direkt auf das vordere Gehäuseteil 2 des Bohrkopfs übertragen, wodurch dieser die Bohrung schrittweise erstellt. Nach einer definierten Vorwärtsbewegung des Kolbens 5 trifft dieser mit einem ringförmigen Überstand 9 auf ein rückseitiges Ende des zweiten Gehäuseteils 3, wodurch die verbleibende kinetische Energie des Kolbens 5 auch auf den zweiten Gehäuseteil 3 des Bohrkopfs sowie das damit verbundene Erdraketengehäuse übertragen wird. Demnach wird, nachdem der vordere Gehäuseteil 2 des Bohrkopfs die Bohrung vorgetrieben hat, das Erdraketengehäuse nachgezogen.In the mounted state of the drill head, the free end of the piston 5 projects into a striking space of the earth rocket, in which a percussion piston driven in a known manner by means of compressed air is driven in a cyclical back-and-forth motion. The forward stroke of the percussion piston is thereby slowed down and terminated, that this impinges on the free end of the piston 5 and accelerates it in the direction forward. This acceleration of the piston 5 is transmitted directly to the front housing part 2 of the drill head, whereby this creates the hole step by step. After a defined forward movement of the piston 5 this meets with an annular projection 9 on a rear end of the second housing part 3, whereby the remaining kinetic energy of the piston 5 is transmitted to the second housing part 3 of the drill head and the associated Erdraketengehäuse. Accordingly, after the front housing part 2 of the drill head has driven the bore, the Erdraketengehäuse tightened.

Der vordere Gehäuseteil 2 des Bohrkopfs besteht aus einem ersten, als Bohrdorn 10 bezeichnete Abschnitt, der einen im Wesentlichen gleich bleibenden Außendurchmesser aufweist. Daran schließt sich ein in Stufenform ausgebildeter, konischer Aufweitabschnitt 11 an, der dazu dient, die von dem Bohrdorn 10 vorgebohrte Bohrung auf den gewünschten Durchmesser aufzuweiten. Der Bohrdorn 10 ist hohl ausgeführt und bildet so eine Aufnahme für einen Sender 12 aus, durch den der Bohrkopf mittels einer an der Erdoberfläche angeordneten Empfangseinheit (nicht dargestellt) lokalisiert werden kann. Der Sender 12, der ebenfalls eine zylindrische Form aufweist, ist grundsätzlich in längsaxialer Richtung (des Bohrkopfs sowie des Senders 12) verschiebbar in der Aufnahme gelagert, wobei hierfür eine Führungsbuchse 13 in den Bohrdorn 10 integriert ist, dessen Material so gewählt ist, dass es zum einen keine oder nur eine geringe Abschirmung der von dem Sender 12 ausgesendeten Signale bewirkt und zum anderen nur einen kleinen Reibungskoeffizienten mit dem Material des Senders 12 aufweist. Der Sender 12 ist über eine Fixierhülse 14 mit einem vorderseitigen Puffer 15 verbunden. Dieser ist ebenfalls beweglich in einem Abschnitt der Aufnahme innerhalb des Bohrdorns 10 gelagert. Auf dem der Fixierhülse 14 gegenüberliegenden Ende des vorderseitigen Puffers 15 ist dieser mit einem Verschlussstopfen 16 verbunden, der die frontseitige Öffnung des Bohrdorns 10 verschließt.The front housing part 2 of the drill head consists of a first, designated as a drill mandrel portion 10, which has a substantially constant outer diameter. This is followed by a conical widening section 11 formed in a stepped shape, which serves to widen the borehole 10 predrilled bore to the desired diameter. The drill mandrel 10 is hollow and thus forms a receptacle for a transmitter 12, by means of which the drill head can be located by means of a arranged on the earth surface receiving unit (not shown). The transmitter 12, which likewise has a cylindrical shape, is in principle mounted slidably in the receptacle in the longitudinal axial direction (of the drill head and of the transmitter 12), for which purpose a guide bush 13 is integrated into the drill mandrel 10 whose material is chosen such that it on the one hand causes no or only a small shielding of the signals emitted by the transmitter 12 and on the other hand has only a small coefficient of friction with the material of the transmitter 12. The transmitter 12 is connected via a fixing sleeve 14 with a front buffer 15. This is also movably mounted in a portion of the receptacle within the drill mandrel 10. On the opposite end of the fixing sleeve 14 of the front-side buffer 15, this is connected to a sealing plug 16, which closes the front opening of the drill mandrel 10.

Die von dem Schlagkolben der Erdrakete auf den Kolben 5, von diesem auf den vorderen Gehäuseteil 2 des Bohrkopfs und von diesem auf den Verschlussstopfen 16 übertragenden Schlagkräfte werden über den vorderseitigen Puffer 16 und die Fixierhülse 14 weiter auf den Sender 12 übertragen, wobei diese als Zugkräfte auf diesen wirken; dieser ist somit ziehend aufgehängt. Die Höhe dieser Zugkräfte wird dadurch verringert, dass sich der vorderseitige Puffer 15 unter Einwirkung der nach vorne wirkenden Schlagkräfte und der Trägheitskräfte des Senders 12 verformt und diese teilweise in Potentialkräfte und in Wärme umwandelt. Dadurch können Kraftspitzen verhindert werden, die zu einer Beschädigung des Senders 12 führen könnten.The impact forces transmitted by the percussion piston of the rocket to the piston 5, from there to the front housing part 2 of the drill head and from there to the closure plug 16 are transmitted further to the transmitter 12 via the front buffer 16 and the fixing sleeve 14, these being tensile forces to act on this; this is thus pulled pulling. The amount of these tensile forces is reduced by the fact that the front-side buffer 15 is deformed under the action of the forward-acting impact forces and the inertial forces of the transmitter 12 and partially converts these into potential forces and into heat. As a result, force peaks can be prevented, which could lead to damage to the transmitter 12.

Der erfindungsgemäße Bohrkopf ist weiterhin mit einem rückseitigen Puffer 17 versehen, der im unbelasteten Zustand des Bohrkopfs in einer definierten, wenn auch sehr kleinen Entfernung von dem rückseitigen Ende des Senders 12 angeordnet ist. Bei der Ausübung von Schlagkräften auf den Kolben 5 des Bohrkopfs kommt es daher zunächst zu einer Relativverschiebung des Senders 12 in der Führungshülse 13, die durch eine Verformung des vorderseitigen Puffers 15 begründet ist, ohne dass es direkt zu einer zusätzlichen dämpfenden Deformation des rückseitigen Puffers 17 kommt. Der rückseitige Puffer 17 dient dazu, bei einem Auftreten von besonders hohen Schlagkräften, die Relativbewegung des Senders 12 in der Führungshülse 13 zusätzlich zu dämpfen.The drill head according to the invention is further provided with a rear buffer 17, which is arranged in the unloaded state of the drill head in a defined, albeit very small distance from the rear end of the transmitter 12. In the exercise of impact forces on the piston 5 of the drill head, therefore, there is initially a relative displacement of the transmitter 12 in the guide sleeve 13, which is due to a deformation of the front-side buffer 15, without directly leading to an additional damping deformation of the back buffer 17th comes. The rear buffer 17 serves, in the event of particularly high impact forces, additionally dampening the relative movement of the transmitter 12 in the guide sleeve 13.

Innerhalb der Fixierhülse 14 befindet sich weiterhin eine Batterie 18, die als interne Energieversorgung für den Sender dient. Diese ist einerseits über eine erste zylindrische Schraubenfeder 19 an dem Sender 12 und andererseits - ebenfalls über eine zweite zylindrische Schraubenfeder 20 und einen zusätzlichen Batteriepuffer 21 - an der aus einem elektrisch leitenden Material bestehenden Fixierhülse 14 abgestützt. Die zylindrischen Schraubenfedern 19, 20 dienen dabei als zusätzliche Pufferelemente und zudem als Kontaktelemente, durch die ein Stromkreis unter Einbindung der elektrisch leitenden Fixierhülse 14 gebildet wird.Within the fixing sleeve 14 is still a battery 18, which serves as an internal power supply for the transmitter. This is on the one hand via a first cylindrical coil spring 19 to the transmitter 12 and on the other hand - also via a second cylindrical coil spring 20 and an additional battery buffer 21 - supported on the existing of an electrically conductive material fixing sleeve 14. The cylindrical coil springs 19, 20 serve as additional buffer elements and also as contact elements, by which a circuit is formed by incorporating the electrically conductive fixing sleeve 14.

Der Verschlussstopfen 16, der vorderseitige Puffer 15, die Fixierhülse 14 und der Sender 12 sind so miteinander verbunden, dass diese als eine Sendereinheit durch die frontseitige Öffnung in die Aufnahme des Bohrdorns 10 eingesetzt und wieder entnommen werden können. Die zwischen die Fixerhülse 14 und den Sender 12 integrierte Energieversorgung stellt ebenfalls einen Bestandteil der Sendereinheit dar.The sealing plug 16, the front buffer 15, the fixing sleeve 14 and the transmitter 12 are connected to each other so that they can be used as a transmitter unit through the front opening in the receptacle of the drill mandrel 10 and removed again. The integrated between the Fixerhülse 14 and the transmitter 12 power supply is also part of the transmitter unit.

Der Verschlussstopfen 16 ist mit einem sich (im eingebauten Zustand in Richtung nach hinten) konisch verjüngenden Abschnitt ausgebildet, der in einen sich entsprechend konisch aufweitenden Abschnitt der Aufnahme des Bohrdorns eingesetzt ist. Diese Verbindung zwischen dem Verschlussstopfen 16 und dem Bohrdorn 10 führt zu einer klemmenden Verbindung zwischen diesen beiden Elementen, die durch die von dem Erdreich auf die Frontseite des Verschlussstopfens 16 wirkenden Widerstandskräfte verstärkt wird. Ein ungewolltes Lösen des Verschlussstopfens 16 sowie der damit verbundenen Elemente der Sendereinheit kann dadurch vermieden werden. Ein ungewolltes Lösen des Verschlussstopfens (z.B. bei der Handhabung vor dem Einbringen in das Erdreich) kann zusätzlich durch einen (nicht dargestellten) Spannstift erfolgen, der in eine Querbohrung 22, die durch den Verschlussstopfen 16 und den vorderen Abschnitt des Bohrdorns 10 führt, eingebracht wird. Ein Lösen des Verschlussstopfens 16 kann mittels eines Werkzeugs erfolgen, das in die zwischen dem Verschlussstopfen 16 und der ringförmigen Stirnfläche des Bohrdorns 10 ausgebildete Nut eingreift.The sealing plug 16 is formed with a (in the installed state in the rearward direction) conically tapered portion which is inserted into a correspondingly conically widening portion of the receptacle of the drill mandrel. This connection between the sealing plug 16 and the reaming mandrel 10 leads to a clamping connection between these two elements, by the of the Soil is reinforced on the front side of the stopper 16 acting resistance forces. An unwanted loosening of the sealing plug 16 and the associated elements of the transmitter unit can be avoided. An unintentional loosening of the sealing plug (eg during handling prior to introduction into the soil) can additionally be effected by a (not shown) dowel pin, which is introduced into a transverse bore 22, which passes through the sealing plug 16 and the front portion of the drill mandrel 10 , A loosening of the sealing plug 16 can be effected by means of a tool which engages in the groove formed between the sealing plug 16 and the annular end face of the drill mandrel 10.

Im Bereich des Senders ist der Bohrdorn mit insgesamt vier Längsöffnungen 23 versehen, die mit einem Kunststoff aufgefüllt sind, das sich dadurch auszeichnet, dass es die von dem Sender ausgestrahlten Signale nicht oder nur schwach abschirmt. Diese Kunststofffüllung verhindert ein Zusetzen der Längsöffnungen 23 mit Erdreich.In the area of the transmitter, the drill mandrel is provided with a total of four longitudinal openings 23, which are filled with a plastic, which is characterized in that it does not or only weakly shield the signals emitted by the transmitter. This plastic filling prevents clogging of the longitudinal openings 23 with soil.

Claims (8)

  1. Drilling element of an earth drilling device with a casing (1) and a transmitter (12) arranged in a receptacle in the casing (1), wherein the transmitter (12) is moveably mounted in the receptacle in the longitudinal axial direction of the drilling element and is connected with the casing (1) via a front-side buffer (15), characterised in that the transmitter (12) is suspended by means of the front-side buffer (15) in an elastically dampened pulling way, so that the transmitter (12) is subjected to a rearward directed displacement in the receptacle by a rearward impact impulse onto the casing (1) that is made possible by a deformation of front-side buffer (15), without the same directly hitting a further element.
  2. Drilling element according to claim 1, characterised in that this is designed as a drill head.
  3. Drilling element according to one of the preceding claims, characterised by a rear-side buffer (17) that is deformed by the transmitter (12) only after a defined rearward directed displacement of the transmitter (12) in the receptacle.
  4. Drilling element according to one of the preceding claims, characterised by an energy supply for the transmitter (12), integrated into the drilling element.
  5. Drilling element according to one of the preceding claims, characterised in that the receptacle is accessible from the outside and can be closed with a closure element.
  6. Drilling element according to claim 5, characterised in that the receptacle is designed as a front-side bore in the drilling element.
  7. Drilling element according to claim 6, characterised in that the closure element is designed as a sealing plug (16) held clamped in the bore.
  8. Drilling element according to one of the claims 5 to 7, characterised in that at least the closure element, the front-side buffer (15) and the transmitter (12) are connected with each other.
EP10763607.8A 2009-10-01 2010-09-24 Boring element of a ground boring device Active EP2483522B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009043716.9A DE102009043716B4 (en) 2009-10-01 2009-10-01 Drilling element of an earth drilling device
PCT/EP2010/005850 WO2011038866A2 (en) 2009-10-01 2010-09-24 Boring element of a ground boring device

Publications (2)

Publication Number Publication Date
EP2483522A2 EP2483522A2 (en) 2012-08-08
EP2483522B1 true EP2483522B1 (en) 2017-12-20

Family

ID=43705490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10763607.8A Active EP2483522B1 (en) 2009-10-01 2010-09-24 Boring element of a ground boring device

Country Status (4)

Country Link
US (1) US9206682B2 (en)
EP (1) EP2483522B1 (en)
DE (1) DE102009043716B4 (en)
WO (1) WO2011038866A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10436016B2 (en) * 2015-03-31 2019-10-08 Halliburton Energy Service, LLP Plug tracking through surface mounted equipment

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673033A (en) * 1985-10-31 1987-06-16 Delaware Halliburton Company Tubing conveyed perforating assembly safety device
US4907658A (en) 1988-09-29 1990-03-13 Gas Research Institute Percussive mole boring device with electronic transmitter
DE4309387C2 (en) 1993-03-23 1999-04-08 Terra Ag Tiefbautechnik Ram drilling machine
EP0759498B1 (en) 1995-08-23 2001-11-07 Tracto-Technik Paul Schmidt Spezialmaschinen Steerable drlling tool with impact sensitive apparatus
DE19534806C2 (en) 1995-08-23 1999-01-21 Tracto Technik Steerable drilling rig
JP3483015B2 (en) * 1995-10-16 2004-01-06 古河機械金属株式会社 Hydraulic shock absorber shock absorber
DE19823629C2 (en) 1998-05-27 2001-08-02 Tracto Technik Housing for transmitter reception
DE19910292A1 (en) 1998-08-27 2000-03-09 Tracto Technik Ground boring ram directed by steering head twists head relative ram housing through indicated angle to change from straightening to curved drivage.
DE19947645C1 (en) 1999-10-04 2001-03-15 Tracto Technik Steering method for directional ground drilling device uses discontinuous rotation of supply line for drilling head for switching between straight and curved drilling modes
DE10052574C2 (en) 2000-10-23 2003-02-06 Tracto Technik Directable rocket and a method for steering an earth rocket

Also Published As

Publication number Publication date
EP2483522A2 (en) 2012-08-08
US9206682B2 (en) 2015-12-08
DE102009043716B4 (en) 2020-04-02
WO2011038866A3 (en) 2011-07-21
WO2011038866A2 (en) 2011-04-07
US20120273274A1 (en) 2012-11-01
DE102009043716A1 (en) 2011-04-07

Similar Documents

Publication Publication Date Title
DE2157259B1 (en) Ram drilling rig
EP0759498B1 (en) Steerable drlling tool with impact sensitive apparatus
CH640304A5 (en) DRILLING TOOL FOR DRILLING HOLES, ESPECIALLY FOR A SELF-DRIVING IMPACT MACHINE.
DE2107112A1 (en) Pulse-shaping element for impact tools
EP2558672A2 (en) Ground-drilling device
DE19652530C2 (en) Downhole hammer
EP2483522B1 (en) Boring element of a ground boring device
DE3152495T1 (en) DRILL HOLDER
EP0565662B1 (en) Drilling process and device
DE10106942B4 (en) Pneumatic bottoming tool with movable chisel head
EP2029851B1 (en) Mud shaft for the drill string of a rotary percussive drilling rig, impact stack for a mud shaft and rotary percussive drilling rig
EP1682745A1 (en) Method and device for the drilling of holes in ground or rocky material
EP2878761B1 (en) Annular bit for drilling a foundation, and a method for detaching an annular bit for drilling a foundation from a sunken tube
DE2824722C3 (en) Rotary percussion drilling device
DE102011000320A1 (en) Drilling rig for carrying out drilling in soil, comprises drilling frame, and drive unit slidably arranged on frame, where drive unit has rod cartridge for detachably connecting with drilling pipe, and drive motor standing with cartridge
EP0979920A2 (en) Drill apparatus with twin impact system
EP4008877B1 (en) Drilling drive device for an earth boring machine
DE19740855C2 (en) Device on a deep drilling machine and method for deep drilling
DE10359880B4 (en) Drill pipe system with a flexible bending element and method for optimized directional drilling
DE19534806C2 (en) Steerable drilling rig
DE102008036722B4 (en) Method, apparatus and drill head for introducing a hole in the soil
EP1162037B1 (en) Rotary percussion device for a drill string
DE3829216A1 (en) Tool for producing a thread-like groove
EP0964133A1 (en) Transmitter housing
DE19616751A1 (en) Counterboring drill

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

17P Request for examination filed

Effective date: 20120413

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20130201

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TRACTO-TECHNIK GMBH & CO.KG

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20170913

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TRACTO-TECHNIK GMBH & CO. KG

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 956579

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502010014491

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20171220

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

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180320

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180321

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180320

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180420

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

Ref country code: DE

Ref legal event code: R097

Ref document number: 502010014491

Country of ref document: DE

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Effective date: 20180921

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

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180930

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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

Ref country code: LU

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

Effective date: 20180924

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

Ref country code: IE

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

Effective date: 20180924

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

Ref country code: LI

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

Effective date: 20180930

Ref country code: CH

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

Effective date: 20180930

Ref country code: BE

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

Effective date: 20180930

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 956579

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180924

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

Ref country code: AT

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

Effective date: 20180924

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20100924

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Ref country code: MK

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

Effective date: 20171220

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

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

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

Ref country code: GB

Payment date: 20230921

Year of fee payment: 14

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

Ref country code: FR

Payment date: 20230919

Year of fee payment: 14

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

Ref country code: DE

Payment date: 20231018

Year of fee payment: 14