WO1992014905A2 - Device for the precise directional control of capping bores - Google Patents

Device for the precise directional control of capping bores Download PDF

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Publication number
WO1992014905A2
WO1992014905A2 PCT/EP1992/000251 EP9200251W WO9214905A2 WO 1992014905 A2 WO1992014905 A2 WO 1992014905A2 EP 9200251 W EP9200251 W EP 9200251W WO 9214905 A2 WO9214905 A2 WO 9214905A2
Authority
WO
WIPO (PCT)
Prior art keywords
drill
borehole
drilling rods
net
guide
Prior art date
Application number
PCT/EP1992/000251
Other languages
German (de)
French (fr)
Other versions
WO1992014905A3 (en
Inventor
Werner Vorhoff
Heinz Wallussek
Martin Meyer
Original Assignee
Bergwerksverband Gmbh
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 Bergwerksverband Gmbh filed Critical Bergwerksverband Gmbh
Publication of WO1992014905A2 publication Critical patent/WO1992014905A2/en
Publication of WO1992014905A3 publication Critical patent/WO1992014905A3/en

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Classifications

    • 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
    • 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 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
    • 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
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1007—Wear protectors; Centralising devices, e.g. stabilisers for the internal surface of a pipe, e.g. wear bushings for underwater well-heads
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • 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
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/062—Deflecting the direction of boreholes the tool shaft rotating inside a non-rotating guide travelling with the shaft

Definitions

  • the invention relates to a device for the precise control of the drill pipe during the production of, in particular, overlay bores, the drill pipe carrying the drill head being influenced by the drilling machine in a rotating or rotating manner.
  • the object is achieved in that the drill rod is surrounded by an outer rod which has an eccentric guide comprising the drill rod at the end associated with the drill head and is rotatable.
  • the drill pipe is still used as an inner pipe for the transmission of pressure and torque and drills the entire drill diameter by rotating or rotating.
  • the outer rod encompasses the drill rod and holds the drilled borehole open when drilling in stable and especially in non-stable mountains.
  • this outer rod has the essential task of taking out the necessary measuring technology and at the same time also taking over the control of the drill pipe.
  • an eccentric guide is provided in the front area, ie in the first tube of the outer linkage, so that the inner linkage can be brought into the position that is necessary or desired by rotating this eccentric guide. This is achieved simply by rotating the outer tube accordingly by the necessary amount, which at the same time also rotates the eccentric guide, which thus brings the drill pipe into the new position provided.
  • the outer rod can be rotated from the mouth of the borehole, so that in this way, if the desired / actual deviations are determined accordingly, the course of the borehole can be corrected from the mouth of the borehole, which is particularly due to this It is possible that the outer rod is arranged unaffected by the rotation of the drill pipe.
  • the outer rod is not designed to rotate, so that the end of the outer rod protruding from the borehole mouth simply has to be rotated in order to make the necessary borehole course correction in the deepest part of the borehole.
  • the first tube of the outer linkage which has the guide, is at the same time designed to serve as a support for the measuring technology. This ensures an optimal measurement of the borehole course, precisely where the corrections are initiated or initiated.
  • the eccentric guide is formed by a ring in which the bore and recesses for conveying cuttings are introduced. The eccentricity of this hole or the entire guide can vary depending on the application. In order to be able to carry out an exchange here, if necessary, or to simplify repairs that become necessary, it is provided that the eccentric guide is designed as a ring detachably connected to the outer linkage.
  • This ring can be easily released since it is connected to the outer linkage by means of retaining and centering screws.
  • the retaining and centering screws ensure that the ring is also fixed in the predetermined position in the outer rod and thus always assumes the same or precisely provided position, since this is the only way to carry out the correct borehole course correction from the borehole mouth can.
  • the measuring technology can be optimally attached to the first tube of the outer rod if, as provided according to the invention, the measuring technology is integrated in the area of the guide into the first tube of the outer rod, specifically in a protective ring with recesses on the inside, which is let into the tube is arranged. In this way, the measuring technology can be brought close to the eccentric guide, which optimizes the evaluation of the respective results.
  • the necessary parts of the measuring technology can then be preassembled in the protective ring, so that the necessary work is considerably simplified. At the same time, precise assembly is ensured.
  • Figure 1 the standing in the borehole front area of the drill pipe in longitudinal section
  • Figure 2 - a prehead view in the cut area.
  • Figure 1 shows the usual drill pipe 1, which can either have an inner channel 2 or consists of solid material and which is encompassed by the outer rod 3.
  • the necessary contact pressure and the torque are transmitted via the drill pipe 1, the drill head forming the front end of the drill pipe 1 not being shown here.
  • the first tube 4 of the outer rod 3 is equipped at the end 5 facing the drilling head (not shown here) with both the measuring technique 6 and an eccentric guide 10.
  • the measuring technique 6 is accommodated in a protective ring 8 provided with a recess 7 or more recesses, this protective ring 8 being let into the outer rod 3.
  • the outer linkage 3 has a correspondingly deep groove.
  • Further measuring technology is accommodated in the area 6 ', the measuring technology being designed such that the inclination, the roll angle and the direction can be measured over 360 °. The direction is then influenced by the eccentric guide 10.
  • the eccentric guide 10 consists of a ring 11, which is shown in FIG. 2, in which an eccentric inner bore 12 is provided in this ring 11, through which or in which the drill pipe 1 is supported, and recesses 16 are provided for the removal of cuttings.
  • FIG. 2 illustrates the arrangement of the ring 11, that is to say for the eccentric guide 10 within the outer rod 3, the drill rod 1, which is guided in the eccentric guide 10 or the inner bore 12, being drawn out as a tube and dashed as a solid material is reproduced.
  • the drill pipe 1 and the outer pipe 3 are only connected to one another in the frame of the guide 10 with frictional engagement.
  • the outer rod 3 thus does not rotate with the drill rod 1, but remains in the intended position while the drill rod 1 rotates therein.
  • the friction in the area of the guide 10 is otherwise not sufficient to take the outer linkage 3 with it. So that the drill pipe 1 is guided by the eccentricity of the guide 10 exactly in the direction that it needs for a perfect course of the borehole.
  • the outer rod 3 is rotated by a corresponding amount.
  • the drill pipe 1 thus automatically changes its drilling direction and the course of the drill hole can be changed and corrected as provided.
  • the outer pipe 3 remains in this position until a further correction should be necessary.
  • small changes can also be made by turning the outer linkage 3, so that one can certainly speak of fine adjustment.

Abstract

To ensure the precise directional control of drilling rods (1), the invention proposes a device in which the drilling rods which transmits the pressure and torque to the bit, are surrounded by loosely fitting outer drilling rods (3). Near the bit, the outer drilling rods are fitted with an eccentric mounting (10) through which the inner drilling rods pass. Rotation of the outer drilling rods thus makes it possible to carry out any correction required to the course of the borehole. This is normally done by simply rotating the outer drilling rods from the borehole mouth. In order to determine the course of the borehole, the longitudinal inclination, transversal inclination and direction of travel of the drilling rods are measured.

Description

Vorrichtung zur zielgenauen Steuerung von Über¬ lagerungsbohrungen Device for the precise control of overlay bores
Die Erfindung betrifft eine Vorrichtung zur zielgenauen Steuerung des Bohrgestänges beim Herstellen von insbe¬ sondere Überlagerungsbohrungen, wobei das den Bohrkopf tragende Bohrgestänge drehend oder drehschlagend von der Bohrmaschine beeinflußt ist.The invention relates to a device for the precise control of the drill pipe during the production of, in particular, overlay bores, the drill pipe carrying the drill head being influenced by the drilling machine in a rotating or rotating manner.
Bekannt sind mehrere steuerbare BohrSysteme für die Herstellung von Bohrungen, die teilweise drehend mit Unterstützung von Hochdruckspülung oder im Rammbohrver¬ fahren arbeiten. Hierbei ist ein einen Innenkanal auf¬ weisendes Bohrgestänge im Einsatz, das aus einzelnen Abschnitten im Bohrvorschritt entsprechend zusammenge¬ setzt wird. Diese bekannten Bohrsysteme haben jedoch Schwierigkeiten, Hartgestein zu durchortern. Außerdem können Richtungskorrekturen beim Abweichen des Bohr¬ kopfes von der vorgesehenen Richtung nur im ober¬ flächennahen Bereich durchgeführt werden. Ansonsten kann in der Regel nicht einmal überprüft werden, wel¬ chen Weg der Bohrkopf genau genommen hat. Der Erfindung liegt die Aufgabe zugrunde, eine Bohrvor¬ richtung mit einer Richtungskorrekturmöglichkeit zu schaffen, die einfach aufgebaut, leicht zu betätigen und zu überwachen ist.Several controllable drilling systems are known for the production of bores, some of which work rotating with the support of high-pressure flushing or in the ram drilling method. Here, a drill pipe with an inner channel is used, which is assembled from individual sections in the pre-drilling step. However, these known drilling systems have difficulties in piercing hard rock. In addition, directional corrections when the drill head deviates from the intended direction can only be carried out in the area near the surface. Otherwise it is generally not even possible to check which path the drill head has taken. The invention has for its object to provide a Bohrvor¬ device with a direction correction option that is simple, easy to operate and monitor.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Bohrgestänge von einem Außengstänge umgeben ist, das am Bohrkopf zugeordneten Ende eine das Bohrgestänge umfassende exzentrische Führung aufweist und drehbar ausgebildet ist.The object is achieved in that the drill rod is surrounded by an outer rod which has an eccentric guide comprising the drill rod at the end associated with the drill head and is rotatable.
Das Bohrgestänge wird nach wie vor als Innengestänge zur Übertragung von Andruck und Drehmoment verwendet und erbohrt drehend oder drehschlagend den gesamten Bohrdurchmesser. Das Außengestänge dagegen umfaßt das Bohrgestänge und hält bei Bohrungen im standfesten und besonders auch im nicht standfesten Gebirge das er¬ bohrte Bohrloch offen. Gleichzeitig hat dieses Außenge¬ stänge aber die wesentliche Aufgabe, die notwendige Meßtechnik au zunehmen und gleichzeitig auch die Steue¬ rung des Bohrgestänges zu übernehmen. Hierzu ist im vorderen Bereich, d. h. im ersten Rohr des Außenge¬ stänges eine exzentrische Führung vorgesehen, so daß das Innengestänge durch Drehen dieser exzentrischen Führung jeweils in die Lage gebracht werden kann, die notwendig bzw. gewünscht ist. Dies wird einfach dadurch erreicht, daß das Außenrohr entsprechend um den not¬ wendigen Betrag gedreht wird, wodurch sich gleichzeitig auch die exzentrische Führung dreht, die damit das Bohrgestänge in die -neue vorgesehene Lage bringt. Damit kann der gewünschte Bohrlochverlauf hergestellt werden, in dem der bisherige Bohrlochverlauf korrigiert wird. Gleichzeitig wird die genaue Position des Bohrkopfes im Außenrohr während des Bohrvorganges gemessen, zur Bohr¬ maschine geleitet und auf einem Kontrollgerät mit dem Bohrlochverlauf dargestellt. Durch einen Soll-Ist-Wert- vergleich kann damit der Bohrlochverlauf ständig kon¬ trolliert und korrigiert werden. Hierzu werden jeweils über 360° die Neigung, der Rollwinkel und die Richtung gemessen, wobei die Richtung mit umlaufend ausgerichte¬ ten Magnetometern ermittelt wird.The drill pipe is still used as an inner pipe for the transmission of pressure and torque and drills the entire drill diameter by rotating or rotating. The outer rod, on the other hand, encompasses the drill rod and holds the drilled borehole open when drilling in stable and especially in non-stable mountains. At the same time, however, this outer rod has the essential task of taking out the necessary measuring technology and at the same time also taking over the control of the drill pipe. For this purpose, an eccentric guide is provided in the front area, ie in the first tube of the outer linkage, so that the inner linkage can be brought into the position that is necessary or desired by rotating this eccentric guide. This is achieved simply by rotating the outer tube accordingly by the necessary amount, which at the same time also rotates the eccentric guide, which thus brings the drill pipe into the new position provided. This enables the desired course of the borehole to be produced by correcting the previous borehole course. At the same time, the exact position of the drill head in the Outer tube measured during the drilling process, directed to the drilling machine and displayed on a control device with the course of the borehole. The course of the borehole can thus be continuously checked and corrected by comparing the target and actual values. For this purpose, the inclination, the roll angle and the direction are measured in each case over 360 °, the direction being determined with circumferentially aligned magnetometers.
Nach einer zweckmäßigen Ausbildung der Erfindung ist vorgesehen, daß das Außengestänge vom Bohrlochmund aus drehbar ist, so daß auf diese Art und Weise bei ent¬ sprechend festgestellten Soll-Ist-Abweichungen sofort eine Korrektur des Bohrlochverlaufes vom Bohrlochmund aus vorgenommen werden kann, was insbesondere dadurch günstig möglich ist, daß das Außengestänge vom Drehen des Bohrgestänges unbeeinflußt angeordnet ist. Hierzu ist das Außengestänge nicht drehend ausgeführt, so daß das aus dem Bohrlochmund herausragende Ende des Außen¬ gestänges einfach nur gedreht werden muß, um unten im Bereich des Bohrlochtiefsten die notwendige Bohrloch¬ verlaufskorrektur vorzunehmen.According to an expedient embodiment of the invention, it is provided that the outer rod can be rotated from the mouth of the borehole, so that in this way, if the desired / actual deviations are determined accordingly, the course of the borehole can be corrected from the mouth of the borehole, which is particularly due to this It is possible that the outer rod is arranged unaffected by the rotation of the drill pipe. For this purpose, the outer rod is not designed to rotate, so that the end of the outer rod protruding from the borehole mouth simply has to be rotated in order to make the necessary borehole course correction in the deepest part of the borehole.
Um die notwendigen Soll-Ist-Wertvergleiche optimal durchführen zu können, ist vorgesehen, daß das erste die Führung aufweisende Rohr des Außengestänges zu¬ gleich als Träger der Meßtechnik dienend ausgebildet ist. Damit ist eine optimale Vermessung des Bohrloch¬ verlaufes sichergestellt, und zwar genau dort, wo auch die Korrekturen eingeleitet bzw. veranlaßt werden. Die exzentrische Führung ist von einem Ring gebildet, in dem die das Bohrgestänge führende Bohrung und Aus¬ nehmungen zur Bohrkleinförderung eingebracht sind. Die Exzentrizität dieser Bohrung bzw. der gesamten Führung kann je nach Einsatzfall unterschiedlich sein. Um hier einen Austausch gegebenenfalls vornehmen zu können, oder auch um notwendig werdende Reparaturen zu verein¬ fachen, ist vorgesehen, daß die exzentrische Führung als lösbar mit dem Außengestänge verbundener Ring aus¬ gebildet ist. Dieser Ring kann einfach gelöst werden, da er über Halte- und Zentrierschrauben mit dem Außen¬ gestänge verbunden ist. Die Halte- und Zentrier¬ schrauben stellen sicher, daß der Ring auch jeweils in der vorgegebenen Position im Außengestänge fixiert ist und damit eine immer gleiche bzw. genau vorgesehene Position einnimmt, da nur so die einwandfreie Bohrloch¬ verlaufskorrektur vom Bohrlochmund aus vorgenommen wer¬ den kann.In order to be able to optimally carry out the required target / actual value comparisons, it is provided that the first tube of the outer linkage, which has the guide, is at the same time designed to serve as a support for the measuring technology. This ensures an optimal measurement of the borehole course, precisely where the corrections are initiated or initiated. The eccentric guide is formed by a ring in which the bore and recesses for conveying cuttings are introduced. The eccentricity of this hole or the entire guide can vary depending on the application. In order to be able to carry out an exchange here, if necessary, or to simplify repairs that become necessary, it is provided that the eccentric guide is designed as a ring detachably connected to the outer linkage. This ring can be easily released since it is connected to the outer linkage by means of retaining and centering screws. The retaining and centering screws ensure that the ring is also fixed in the predetermined position in the outer rod and thus always assumes the same or precisely provided position, since this is the only way to carry out the correct borehole course correction from the borehole mouth can.
Die Meßtechnik kann optimal am ersten Rohr des Außenge¬ stänges angebracht werden, wenn, wie erfindungsgemäß vorgesehen, die Meßtechnik im Bereich der Führung in das erste Rohr des Außengestänges integriert, und zwar in einem innenseitig Ausnehmungen aufweisenden Schutz- ring, der in das Rohr eingelassen ist, angeordnet ist. Auf diese Art und Weise kann die Meßtechnik dicht an die exzentrische Führung herangebracht werden, wodurch die Auswertung der jeweiligen Ergebnisse optimiert ist. Gleichzeitig ist die Möglichkeit gegeben, die notwendi¬ gen Teile der Meßtechnik genau dort anzubringen, wo sie optimal benötigt werden, um auch in eventuelle Über- wachungs- und Reparaturmaßnahmen vorzunehmen, da dazu nur der Schutzring entfernt bzw. ausgewechselt werden muß. Die notwendige Meßtechnik kann dann im Schutzring vormontiert werden, so daß die notwendigen Arbeiten we¬ sentlich vereinfacht sind. Gleichzeitig ist eine genaue Montage gesichert.The measuring technology can be optimally attached to the first tube of the outer rod if, as provided according to the invention, the measuring technology is integrated in the area of the guide into the first tube of the outer rod, specifically in a protective ring with recesses on the inside, which is let into the tube is arranged. In this way, the measuring technology can be brought close to the eccentric guide, which optimizes the evaluation of the respective results. At the same time, there is the possibility of attaching the necessary parts of the measuring technology exactly where they are optimally required, in order to also carry out any monitoring and repair measures, since only the protective ring is removed or replaced for this purpose got to. The necessary measuring technology can then be preassembled in the protective ring, so that the necessary work is considerably simplified. At the same time, precise assembly is ensured.
Als deutliche Vorteile sind die sicher und zugleich schnell vorzunehmenden Bohrlochverlaufskorrekturen auch bei Überlagerungsbohrungen und ähnlichen Bohrungen, auch außerhalb des oberflächennahen Arbeitsbereiches anzusehen. Damit ist die Möglichkeit gegeben, zielge¬ naue Bohrungen herzustellen, wobei eine ständige Über¬ wachung des Bohrlochverlaufes möglich ist. Der dafür notwendige Aufwand ist verhältnismäßig gering. Das zielgenaue steuerbare Bohrsystem bringt somit erhebli¬ che betriebliche und kostenmäßige Vorteile.The safe and at the same time quick borehole course corrections can also be seen as clear advantages, even for overlay boreholes and similar boreholes, even outside the near-surface work area. This provides the possibility of producing precise bores, with constant monitoring of the course of the borehole being possible. The effort required for this is relatively low. The precisely controllable drilling system thus brings considerable operational and cost advantages.
Die Erfindung wird nachfolgend anhand der Figuren wei¬ ter erläutert. Dabei zeigenThe invention is explained below with reference to the figures. Show
Figur 1 - den im Bohrloch stehenden vorderen Bereich des Bohrgestänges im Längsschnitt undFigure 1 - the standing in the borehole front area of the drill pipe in longitudinal section and
Figur 2 - eine Vorkopfansicht im geschnittenen Be¬ reich.Figure 2 - a prehead view in the cut area.
Figur 1 zeigt das übliche Bohrgestänge 1, das entweder einen Innenkanal 2 aufweisen kann oder aus Vollmaterial besteht und das vom Außengestänge 3 umfaßt ist. Über das Bohrgestänge 1 wird der notwendige Andruck und das Drehmoment übertragen, wobei der das vordere Ende des Bohrgestänges 1 bildende Bohrkopf hier nicht darge¬ stellt ist. Das erste Rohr 4 des Außengestänges 3 ist an dem hier nicht dargestellten Bohrkopf zugewandten Ende 5 sowohl mit der Meßtechnik 6 wie mit einer exzentrischen Füh¬ rung 10 ausgerüstet.Figure 1 shows the usual drill pipe 1, which can either have an inner channel 2 or consists of solid material and which is encompassed by the outer rod 3. The necessary contact pressure and the torque are transmitted via the drill pipe 1, the drill head forming the front end of the drill pipe 1 not being shown here. The first tube 4 of the outer rod 3 is equipped at the end 5 facing the drilling head (not shown here) with both the measuring technique 6 and an eccentric guide 10.
Die Meßtechnik 6 ist in einem mit einer Ausnehmung 7 oder mehreren Ausnehmungen versehenen Schutzring 8 un¬ tergebracht, wobei dieser Schutzring 8 in das Außenge¬ stänge 3 eingelassen ist. Das Außengestänge 3 weist hierzu eine entsprechend tiefe Nut auf. Weitere Me߬ technik ist im Bereich 6' untergebracht, wobei die Me߬ technik so ausgebildet ist, daß über 360° die Neigung, der Rollwinkel und die Richtung gemessen werden können. Die Richtung wird dann über die exzentrische Führung 10 beeinflußt.The measuring technique 6 is accommodated in a protective ring 8 provided with a recess 7 or more recesses, this protective ring 8 being let into the outer rod 3. For this purpose, the outer linkage 3 has a correspondingly deep groove. Further measuring technology is accommodated in the area 6 ', the measuring technology being designed such that the inclination, the roll angle and the direction can be measured over 360 °. The direction is then influenced by the eccentric guide 10.
Die exzentrische Führung 10 besteht aus einem Ring 11, der in Figur 2 wiedergegeben ist, wobei in diesem Ring 11 eine exzentrische Innenbohrung 12 vorgesehen ist, durch die bzw. in der das Bohrgestänge 1 gelagert wird, und Ausnehmungen 16 zur Bohrkleinabförderung vorhanden sind.The eccentric guide 10 consists of a ring 11, which is shown in FIG. 2, in which an eccentric inner bore 12 is provided in this ring 11, through which or in which the drill pipe 1 is supported, and recesses 16 are provided for the removal of cuttings.
Die exzentrische Führung 10 bzw. der Ring 11 sind über Halte- und Zentrierschrauben 13, 14 lösbar mit dem Au¬ ßengestänge 3 verbunden, so daß der Ring 11 ohne Pro¬ bleme ausgewechselt und durch einen anderen ersetzt werden kann, wenn sich dies aus irgendwelchen Gründen als notwendig erweist. Angedeutet ist, daß der Ring 11 zusätzlich über einen Vorsprung 15 hin zum Außenrohr 3 gesichert werden kann. Figur 2 verdeutlicht die Anordnung des Ringes 11, d. h. zur exzentrischen Führung 10 innerhalb des Außengestän¬ ges 3, wobei das Bohrgestänge 1, das in der exzentri¬ schen Führung 10 bzw. der Innenbohrung 12 geführt ist, ausgezogen- als Rohr und gestrichelt als Vollmaterial wiedergegeben ist.The eccentric guide 10 or the ring 11 are releasably connected to the outer linkage 3 by means of holding and centering screws 13, 14, so that the ring 11 can be exchanged without problems and replaced by another if this results from any Reasons prove necessary. It is indicated that the ring 11 can additionally be secured to the outer tube 3 via a projection 15. FIG. 2 illustrates the arrangement of the ring 11, that is to say for the eccentric guide 10 within the outer rod 3, the drill rod 1, which is guided in the eccentric guide 10 or the inner bore 12, being drawn out as a tube and dashed as a solid material is reproduced.
Das Bohrgestänge 1 und das Außengestänge 3 sind, wie aus Figur 1 entnommen werden kann, lediglich im Rahmen der Führung 10 mit Reibschluß miteinander verbunden. Das Außengestänge 3 dreht sich somit mit dem Bohrge¬ stänge 1 nicht mit, sondern bleibt in der vorgesehenen Stellung stehen, während sich das Bohrgestänge 1 darin dreht. Die Reibung im Bereich der Führung 10 reicht im übrigen nicht aus, um das Außengestänge 3 mitzunehmen. Damit wird das Bohrgestänge 1 durch die Exzentrizität der Führung 10 genau in die Richtung geleitet, die es für einen einwandfreien Bohrlochverlauf braucht.As can be seen from FIG. 1, the drill pipe 1 and the outer pipe 3 are only connected to one another in the frame of the guide 10 with frictional engagement. The outer rod 3 thus does not rotate with the drill rod 1, but remains in the intended position while the drill rod 1 rotates therein. The friction in the area of the guide 10 is otherwise not sufficient to take the outer linkage 3 with it. So that the drill pipe 1 is guided by the eccentricity of the guide 10 exactly in the direction that it needs for a perfect course of the borehole.
Wird nun anhand der Meßtechnik ermittelt, daß der Bohr¬ lochverlauf mit dem vorgesehenen nicht mehr überein¬ stimmt, so wird das Außengestänge 3 um einen ent¬ sprechenden Betrag gedreht. Damit verändert das Bohr¬ gestänge 1 automatisch seine Bohrrichtung und der Bohr¬ lochverlauf kann, wie vorgesehen, verändert und korri¬ giert werden. Nachdem das Bohrgestänge 1 seine richtige Richtung wieder eingenommen hat, verbleibt das Außen¬ gestänge 3 in dieser Position, bis eine weitere Kor¬ rektur notwendig werden sollte. Natürlich können durch Drehen des Außengestänges 3 auch kleine Änderungen vor¬ genommen werden, so daß durchaus von einer FeinJus¬ tierung gesprochen werden kann. βIf it is now determined on the basis of the measuring technique that the course of the borehole no longer corresponds to the intended one, then the outer rod 3 is rotated by a corresponding amount. The drill pipe 1 thus automatically changes its drilling direction and the course of the drill hole can be changed and corrected as provided. After the drill pipe 1 has returned to its correct direction, the outer pipe 3 remains in this position until a further correction should be necessary. Of course, small changes can also be made by turning the outer linkage 3, so that one can certainly speak of fine adjustment. β
BezugszeichenlisteReference list
1 Bohrgestänge1 drill pipe
2 Innenkanal2 inner channels
3 Außengestänge3 outer rods
4 erste Rohr von 34 first tube of 3
5 dem Kopf zugewandtes Ende5 end facing the head
6 Meßtechnik6 measurement technology
7 Ausnehmung7 recess
8 Schutzring8 guard ring
10 Führung exzentrisch10 leadership eccentric
11 Ring11 ring
12 Innenbohrung exzentrisch12 eccentric inner bore
13 Halte- und Zentnerschrauben13 retaining and centering screws
14 Halte- und Zentnerschrauben14 retaining and centering screws
15 Vorsprung15 head start
16 Ausnehmungen zur Bohrkleinab¬ förderung 16 recesses for drilling cuttings

Claims

Patentansprüche Claims
1. Vorrichtung zur zielgenauen Steuerung des Bohrge¬ stänges beim Herstellen von insbesondere Überlage¬ rungsbohrungen, wobei das den Bohrkopf tragende Bohrgestänge drehend oder drehschlagend von der Bohrmaschine beeinflußt ist, dadurch gekennzeich¬ net, daß das Bohrgestänge (1) von einem Außenge¬ stänge (3) umgeben ist, das an dem dem Bohrkopf zugewandten Ende (5) eine das Bohrgestänge (1) um¬ fassende exzentrische Führung (10) aufweist und drehbar ausgebildet ist.1. Device for the precise control of the drill rod during the production of, in particular, overlay bores, the drill rod carrying the drill head being influenced by the drilling machine in a rotating or rotating manner, characterized in that the drill rod (1) is driven by an outer rod ( 3) is surrounded, which has at the end (5) facing the drill head an eccentric guide (10) encompassing the drill pipe (1) and is designed to be rotatable.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeich¬ net, daß das Außengestänge (3) vom Bohrlochmund aus drehbar ist.2. Device according to claim 1, characterized gekennzeich¬ net that the outer linkage (3) from the borehole mouth is rotatable.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeich¬ net, daß das Außengestänge (3) vom Drehen des Bohrgestänges (1) unbeeinflußt angeordnet ist.3. Apparatus according to claim 1, characterized gekennzeich¬ net that the outer rod (3) from the rotation of the drill pipe (1) is arranged unaffected.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeich¬ net, daß das erste die Führung (10) aufweisende Rohr (4) des Außengestänges (3) zugleich als Trä¬ ger der Meßtechnik (6) dienend ausgebildet ist. Vorrichtung nach Anspruch 1, dadurch gekennzeich¬ net, daß die exzentrische Führung (10) als lösbar mit dem Außengestänge (3) verbundener Ring (11) ausgebildet ist.4. The device according to claim 1, characterized gekennzeich¬ net that the first guide (10) having tube (4) of the outer linkage (3) is at the same time designed as a support for measuring technology (6) serving. Apparatus according to claim 1, characterized gekennzeich¬ net that the eccentric guide (10) is designed as a detachably connected to the outer linkage (3) ring (11).
Vorrichtung nach Anspruch 5, dadurch gekennzeich¬ net, daß der Ring (11) über Halte- und Zentrier¬ schrauben (13, 14) mit dem Außengestänge (3) ver¬ bunden ist.Apparatus according to claim 5, characterized gekennzeich¬ net that the ring (11) via retaining and centering screws (13, 14) is connected to the outer linkage (3).
Vorrichtung nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Meßtechnik (6) im Bereich der Führung (10) in das erste Rohr (4) des Außen¬ gestänges (3) integriert, und zwar in einem innen¬ seitig Ausnehmungen (7) aufweisenden Schutzring (8), der in das Rohr (4) eingelassen ist, angeord¬ net ist. Device according to claims 1 and 4, characterized in that the measuring technology (6) in the region of the guide (10) is integrated into the first tube (4) of the outer linkage (3), specifically in recesses (7) on the inside ) has protective ring (8), which is embedded in the tube (4), is arranged.
PCT/EP1992/000251 1991-02-19 1992-02-05 Device for the precise directional control of capping bores WO1992014905A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4104992A DE4104992C2 (en) 1991-02-19 1991-02-19 Device for the precise control of overlay bores
DEP4104992.6 1991-02-19

Publications (2)

Publication Number Publication Date
WO1992014905A2 true WO1992014905A2 (en) 1992-09-03
WO1992014905A3 WO1992014905A3 (en) 1992-11-26

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WO (1) WO1992014905A2 (en)
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EP0563950A1 (en) * 1992-04-02 1993-10-06 Ing. Anton Loibelsberger jun. Apparatus and method for directional drilling
US6467557B1 (en) 1998-12-18 2002-10-22 Western Well Tool, Inc. Long reach rotary drilling assembly
US6470974B1 (en) 1999-04-14 2002-10-29 Western Well Tool, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
WO2014025893A3 (en) * 2012-08-07 2014-11-06 Dura Drilling, Inc. High-speed triple string drilling system

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DE19923555C1 (en) * 1999-05-21 2000-11-02 Tracto Technik Directional borehole drilling device uses radially adjustable steering head incorporated in driven drill rod for determining drilling direction
WO2004090276A1 (en) * 2003-03-31 2004-10-21 The Charles Machine Works, Inc. Directional reaming system

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US3377549A (en) * 1964-12-23 1968-04-09 Arps Corp Coil assembly structure and mounting forming an annular chamber to be mounted and sealed on a drill collar
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WO1990000666A1 (en) * 1987-03-16 1990-01-25 Stiftelsen For Industriell Og Teknisk Forskning Ved Nth (Sintef) Device for steering the direction of drilling
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DE3928619A1 (en) * 1989-08-30 1991-03-07 Preussag Ag Directional drilling rig has drill rod inside drill pipe - with drill bit at angle to drill pipe axis and driven independently or simultaneously with drill pipe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563950A1 (en) * 1992-04-02 1993-10-06 Ing. Anton Loibelsberger jun. Apparatus and method for directional drilling
US6467557B1 (en) 1998-12-18 2002-10-22 Western Well Tool, Inc. Long reach rotary drilling assembly
US6470974B1 (en) 1999-04-14 2002-10-29 Western Well Tool, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
US6708783B2 (en) 1999-04-14 2004-03-23 Western Well Tool, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
US6942044B2 (en) 1999-04-14 2005-09-13 Western Well Tools, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
WO2014025893A3 (en) * 2012-08-07 2014-11-06 Dura Drilling, Inc. High-speed triple string drilling system

Also Published As

Publication number Publication date
ZA921087B (en) 1992-11-25
DE4104992C2 (en) 1994-06-09
DE4104992A1 (en) 1992-08-20
WO1992014905A3 (en) 1992-11-26

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