EP1888878B1 - Procede et dispositif pour le forage, notamment pour le forage par percussion ou par roto-percussion, d'un trou dans le sol ou la roche - Google Patents

Procede et dispositif pour le forage, notamment pour le forage par percussion ou par roto-percussion, d'un trou dans le sol ou la roche Download PDF

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Publication number
EP1888878B1
EP1888878B1 EP06741019A EP06741019A EP1888878B1 EP 1888878 B1 EP1888878 B1 EP 1888878B1 EP 06741019 A EP06741019 A EP 06741019A EP 06741019 A EP06741019 A EP 06741019A EP 1888878 B1 EP1888878 B1 EP 1888878B1
Authority
EP
European Patent Office
Prior art keywords
anchoring element
drill bit
borehole
drilling
drill
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
EP06741019A
Other languages
German (de)
English (en)
Other versions
EP1888878B8 (fr
EP1888878A1 (fr
Inventor
Josef Mocivnik
Alfred Wagner
Karl BÖHM
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.)
DYWIDAG-Systems International GmbH
Original Assignee
Dywidag Systems International GmbH Austria
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 Dywidag Systems International GmbH Austria filed Critical Dywidag Systems International GmbH Austria
Priority to PL06741019T priority Critical patent/PL1888878T3/pl
Priority to SI200631122T priority patent/SI1888878T1/sl
Publication of EP1888878A1 publication Critical patent/EP1888878A1/fr
Application granted granted Critical
Publication of EP1888878B1 publication Critical patent/EP1888878B1/fr
Publication of EP1888878B8 publication Critical patent/EP1888878B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • 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
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0053—Anchoring-bolts in the form of lost drilling rods
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid

Definitions

  • the present invention relates to a method for percussion or rotary impact drilling a hole in soil or rock material and defining an anchor in the hole, wherein a borehole is formed by a drill bit mounted on a drill bit, as well as a device for impact or Rotary drilling a hole in soil or rock material and defining an anchorage in the hole, wherein a drill hole is formed by a drill bit supported on a drill string.
  • WO 98/21439 In connection with the production of a hole in soil or rock material and a subsequent determination of an anchorage or a lining in the borehole, it is for example from WO 98/21439 and the WO 98/58132 it is known to introduce a cladding tube into the wellbore during the drilling operation, such as impact or rotational impact drilling, whereupon after completion of the bore, if necessary, a portion of the drillcrown is removed from the well together with the drill string while the cladding tube remains in the wellbore so that subsequently is formed by filling with a hardening mass anchor in the borehole.
  • the drill pipe can be formed on its outer circumference with additional ribs and grooves, so that when the drill string remains in the borehole and a subsequent backfilling a correspondingly good anchor effect can be achieved.
  • a modified embodiment of a method and an apparatus for drilling a hole and forming an anchor is the WO 02/088523 A1 it can be seen in which the drill pipe is removed from the well to form the anchorage after completion of the drilling operation, followed by a separate expansion element is taken from outside the borehole in the interior of the anchoring element for the formation of the anchorage and the expansion of the anchoring element.
  • an anchor or an anchor device is introduced into the well, for example, from the EP-B 0 241 451 , of the US-A 4,490,074 , of the DE-AS 21 05 888 , of the US-A 4,310,266 , of the EP-A 0 875 663 and further references embodiments are known in which the subsequently introduced, for example, tubular anchoring is held by appropriate holding elements on a reduced compared to the final diameter, after which it comes after complete insertion into the borehole in contact with the borehole wall to achieve a desired anchoring effect is pressed.
  • the present invention therefore aims to provide a method and a device of the type mentioned, with a structurally simple means a provisional backup already during the drilling process and a reliable anchoring immediately after completion of the drilling process can be achieved.
  • a method of the type mentioned is essentially characterized in that an anchoring element surrounding the drill string is frictionally introduced into the well, in particular at a distance from the drill bit and that after completion of the well, the anchoring element is widened that the drill string after completion the borehole is retracted in the direction of the anchoring element and the anchoring element is widened by an expansion element mounted on the drill string on the side of the drill bit facing away from the excavation surface.
  • a surrounding the drill string anchoring element frictionally is introduced into the well, it is ensured that a provisional anchoring effect is achieved by the frictional action between the outer periphery of the anchoring element and the inner circumference of the borehole, so that at any time a provisional securing of the anchor formed by the anchoring element and the drill bit arranged thereon achievable is.
  • the drill pipe is bent back after completion of the borehole in the direction of the anchoring element and the anchoring element is expanded by a drill string on the side facing away from the excavation surface side of the drill bit expander.
  • the anchoring element according to the invention frictionally engaged and thus secured in position is introduced into the interior of the borehole, the drill string together with the drill bit can retract over a the section between the drill bit and the anchoring element corresponding length from the borehole, whereupon the anchoring element by a mounted on the drill string expansion element in Plant is widened to the well and additionally pressed.
  • the strength or resistance of the anchorage after expansion of the anchoring element in particular by setting a tester on the drill string on the from the well protruding end is checked.
  • the anchoring element is taken directly at a distance from the drill bit in continuation of the drilling process, it allows for a such increase in the length of the borehole through the anchoring element, which in turn is frictionally engaged or placed in contact with the borehole inner wall, a provisional backup and subsequently achieve a simple determination of the anchoring element by widening.
  • the anchoring element is widened to an outer circumference which is larger than the first expansion process.
  • a device of the type mentioned above is substantially characterized in that the drill string is surrounded at the remote from the excavation surface of the drill bit back at a distance from the drill bit of an anchoring element whose outer dimension at least partially the circumference of borehole produced by the drill bit exceeds that on the side facing away from the excavation surface of the drill bit an expanding element tapering from the drill bit in the direction of the anchoring element is provided, which after completion of the bore by retraction of the drill pipe from the wellbore in the expandable anchoring element can be introduced.
  • the anchoring element the outer dimension of which at least partially exceeds the circumference of the wellbore produced by the drill bit, is substantially frictionally engaged in the interior of the wellbore during the drilling operation, a simple temporary downhole safeguard is available to deliver.
  • an expanding element which tapers in the direction of the anchoring element, permits a simple and reliable entry of the expansion element into the end region of the anchoring element facing the drill bit, whereby a corresponding increasing widening of the anchoring element as a result of the conical taper or expansion as it enters the interior of the anchoring element is achieved by pressing against the borehole inner wall.
  • a slotted tube or pipe which has portions of a reduced outer circumference or reduced external dimensions, can be partially vary slightly in size to adapt to different geological conditions, always ensuring that a frictional engagement is present at least in some areas and thus a provisional securing of the anchoring element during the production of the borehole can be achieved.
  • the anchoring element is formed at its end facing the drill bit with a chamfer.
  • a taper or taper on the end facing the drill bit end of the anchoring element in particular prevents seizure or wedging on the inner wall of the borehole during insertion of the anchoring element during the drilling process.
  • the expander element which conically tapers in the direction of the anchoring element, can be correspondingly easily deployed from the anchoring element when the drill string is acted on and, as a consequence, the drilling process can be carried out or continued via the upstream drill bit.
  • a stopper which can be fixed to the drill pipe is provided at the end facing away from the drill bit end of the anchoring element.
  • a stop which can be fixed to the drill pipe, may be formed, for example, in the manner of a nut or a threaded annular element which can be fixed in a threaded drill pipe in adaptation to the intended positioning of the anchoring element on the drill pipe.
  • the anchoring element is formed, at least in its end region facing the drill bit, from a material with a memory effect biased in the direction of a reduction of the outside dimension. After removal of the expansion element from the anchoring element, the anchoring element returns at least partially or in the drill bit facing portion substantially back to its original outer dimensions, so that a reliable insertion of the anchoring element is also possible during the continued drilling operation.
  • the outer dimension of the anchoring element during the drilling process exceeds the outer circumference of the drill bit by a maximum of 10 percent, preferably about 3 to 5 percent.
  • Fig. 1 and 2 is generally denoted by 1 a device for producing a borehole, not shown, wherein a drill bit 3 is mounted on a particular hollow drill string 2, which by a drive device not shown in detail, which acts on the protruding from the borehole end of the drill string 2, is driven to a rotating and / or beating movement for producing the borehole not shown in detail.
  • an anchoring element 4 is provided, the outer circumference and outer diameter of those the drill bit 3 slightly exceeds, as can be seen from 3 and 4 is apparent, wherein it is shown that the diameter D (1) of the drill bit 3 is smaller than the diameter D (2) of the anchoring element 4.
  • a widening element 6 is mounted on the drill pipe 2 between the drill bit 3 and the anchoring element 4, which has a tapered in the direction of the anchoring element 4 or reduced cross-section.
  • a stop for example in the form of a ring 7 is provided, on which the anchoring element 4 comes into abutment.
  • the anchoring element 4 at its end facing the drill bit 3 a chamfer or taper 8, which allows easy insertion during the frictional engagement on the inner wall of the well.
  • cylindrical or tubular anchoring element 4 has a longitudinally extending slot 9, which according to the dimensions of the borehole inner wall prevents introduction of an excessive frictional force.
  • the outer dimension of the anchoring element 4 during the drilling process is shown to exceed a maximum of 10 percent, for example, about 5 percent.
  • FIGS. 5 and 6 It is shown how after completion of a drilling operation, the drill pipe 2 and the drill bit 3 are withdrawn together with the expander 6 according to the arrow 10 against the drilling direction toward the anchoring element 4, wherein by entering the expanding toward the drill bit 3 expander 6th the anchoring element 4 is correspondingly widened at the end facing the drill bit 3 and placed in an additionally secured position on the borehole wall.
  • the expansion element 6 is withdrawn with the drill bit 3 in the anchoring element 4, wherein, for example, the Increase the securing or anchoring effect the expansion element 6 on the in FIGS. 5 and 6 shown state deeper into the anchoring element 4 can be introduced or withdrawn, so that a correspondingly larger expansion of the outer periphery of the anchoring element 4 to achieve an increased anchoring effect is possible.
  • an anchoring element denoted by 11 is used, which in contrast to the embodiment according to the Fig. 1 to 6 is not provided with a longitudinal slot, but at its outer periphery portions of reduced diameter or reduced dimensions 12, which in turn prevent excessive frictional force during the drilling process.
  • the partial regions of the anchoring element 11 which are different from the partial regions 12 are formed with an enlarged diameter or enlarged external dimensions relative to the drill bit 3.
  • At least in the drill bit 3 facing portion be used to achieve a corresponding reduction in the outer dimensions after deployment of the expansion element 6, so that excessive frictional forces do not occur during the continued drilling process.
  • the length of the anchoring elements 4 and 11 and their distance from the drill bit 3 and the expansion element 6 can be selected by the stop 7 according to the circumstances. Furthermore, it can be seen from the above representations that degraded material can be discharged through the formed between the anchoring element 4 and 11 and the outer periphery of the drill pipe 2 cavity or annulus 13 readily in a region behind the anchoring element 4 and 11, for which corresponding Passage opening are also provided in the region of the stopper 7.
  • a cooling or rinsing fluid can be discharged into the area of the drill bit 3.
  • a central channel 14 of the drill string 2 can also, in particular after a final completion of the well also a curable composition, if necessary, in particular in the area of the drill bit 3 and the anchoring element 4 and 11 are applied to further increase the anchoring effect.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour le forage, notamment pour le forage par percussion ou par roto-percussion, d'un trou dans le sol ou la roche, ainsi que pour la fixation d'un ancrage dans le trou, un trou de forage étant formé par une couronne de forage (3) montée sur un train de tiges de forage (2). Selon l'invention, le train de tiges de forage (2) est entouré, au niveau de la face arrière opposée à la surface de taille (5) de la couronne de forage (3), notamment à distance de la couronne de forage (3), d'un élément d'ancrage (4) dont la dimension extérieure dépasse au moins partiellement la circonférence du trou de forage produit par la couronne de forage (3). Cela permet d'assurer, de manière simple et fiable, un blocage de l'ancrage dans un trou de forage.

Claims (10)

  1. Procédé de forage à percussion ou à rotary percussion d'un trou dans le sol ou de la roche et de fixation d'un ancrage dans le trou, un trou de sonde étant formé par un trépan (3) monté sur un train de tiges (2), caractérisé en ce qu'un élément d'ancrage (4, 11), qui entoure le train de tiges (2), est introduit par force de friction dans le trou de sonde à distance du trépan (3), que le train de tiges (2), après l'achèvement du trou de sonde, est reculé en direction de l'élément d'ancrage (4, 11) et l'élément d'ancrage (4, 11) est élargi par un élément d'élargissement (6), monté sur le train de tiges (2) sur le côté du trépan (3) opposé à la surface d'attaque.
  2. Procédé suivant la revendication 1, caractérisé en ce que la stabilité ou la résistance de l'ancrage, après l'élargissement de l'élément d'ancrage (4, 11), est contrôlée en particulier par fixation d'un dispositif de contrôle sur le train de tiges (2) sur l'extrémité dépassant du trou de sonde.
  3. Procédé suivant la revendication 2, caractérisé en ce que, lors de ou après la détermination d'une baisse de résistance de l'ancrage, le train de tiges (2) est de nouveau mis en oeuvre pour un forage à percussion ou à rotary percussion en vue d'augmenter la longueur du trou de sonde.
  4. Procédé suivant la revendication 3, caractérisé en ce que, après l'augmentation de la longueur du trou de sonde, l'élément d'ancrage (4, 11) est élargi à un pourtour extérieur agrandi par rapport à la première opération d'élargissement.
  5. Dispositif de forage à percussion ou à rotary percussion d' un trou dans le sol ou de la roche et de fixation d'un ancrage dans le trou, un trou de sonde étant réalisé par un trépan (3) monté sur un train de tiges (2), caractérisé en ce que le train de tiges (2), sur le côté arrière opposé à la surface d'attaque (5) du trépan (3), est entouré à distance du trépan (3) par un élément d'ancrage (4, 11), dont la dimension extérieure dépasse au moins en partie le pourtour du trou de sonde créé par le trépan (3), qu'un élément d'élargissement (6), se rétrécissant en direction de l'élément d'ancrage (4, 11), est prévu sur le côté opposé à la surface d'attaque (5) du trépan (3), lequel élément d'élargissement peut être introduit dans l'élément d'ancrage (4, 11) à élargir, après l'achèvement du puits, par un recul du train de tiges (2) du trou de sonde.
  6. Dispositif suivant la revendication 5, caractérisé en ce que l'élément d'ancrage est formé par un tube (4) fendu dans la direction longitudinale et/ou par un tube (11), qui présente des zones partielles (12) de pourtour extérieur réduit.
  7. Dispositif suivant l'une des revendications 5 et 6, caractérisé en ce que l'élément d'ancrage (4, 11) est réalisé avec un chanfrein (8) sur son extrémité tournée vers le trépan.
  8. Dispositif suivant l'une des revendications 5 à 7, caractérisé en ce qu'une butée (7), pouvant être fixée sur le train de tiges (2), est prévue sur l'extrémité de l'élément d'ancrage (4, 11) opposée au trépan (3).
  9. Dispositif suivant l'une des revendications 5 à 8, caractérisé en ce que l'élément d'ancrage (4, 11) est formé, au moins dans sa zone extrême tournée vers le trépan, d'un matériau à effet de mémoire précontraint dans le sens d'une réduction de la dimension extérieure.
  10. Dispositif suivant l'une des revendications 5 à 9, caractérisé en ce que la dimension extérieure de l'élément d'ancrage (4, 11) dépasse, pendant l'opération de forage, le pourtour extérieur du trépan (3) d'au maximum 10%, de préférence d'environ 3 à 5%.
EP06741019A 2005-06-07 2006-05-30 Procede et dispositif pour le forage, notamment pour le forage par percussion ou par roto-percussion, d'un trou dans le sol ou la roche Active EP1888878B8 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL06741019T PL1888878T3 (pl) 2005-06-07 2006-05-30 Sposób i urządzenie do wiercenia, zwłaszcza do udarowego i obrotowo-udarowego wiercenia otworu w gruncie lub materiale skalnym
SI200631122T SI1888878T1 (sl) 2005-06-07 2006-05-30 Postopek in naprava za vrtanje še zlasti udarnovrtanje ali vrtljivo udarno vrtanje luknje v tla ali kamnit material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0096305A AT501875B1 (de) 2005-06-07 2005-06-07 Verfahren und vorrichtung zum bohren, insbesondere schlag- oder drehschlagbohren eines lochs in boden- oder gesteinsmaterial
PCT/AT2006/000220 WO2006130889A1 (fr) 2005-06-07 2006-05-30 Procede et dispositif pour le forage, notamment pour le forage par percussion ou par roto-percussion, d'un trou dans le sol ou la roche

Publications (3)

Publication Number Publication Date
EP1888878A1 EP1888878A1 (fr) 2008-02-20
EP1888878B1 true EP1888878B1 (fr) 2011-06-29
EP1888878B8 EP1888878B8 (fr) 2012-02-22

Family

ID=36754094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06741019A Active EP1888878B8 (fr) 2005-06-07 2006-05-30 Procede et dispositif pour le forage, notamment pour le forage par percussion ou par roto-percussion, d'un trou dans le sol ou la roche

Country Status (15)

Country Link
US (1) US7874380B2 (fr)
EP (1) EP1888878B8 (fr)
JP (1) JP2008542594A (fr)
KR (1) KR20080021616A (fr)
CN (1) CN101189410A (fr)
AT (2) AT501875B1 (fr)
AU (1) AU2006255521B2 (fr)
CA (1) CA2609737C (fr)
DK (1) DK1888878T3 (fr)
ES (1) ES2369485T3 (fr)
PL (1) PL1888878T3 (fr)
PT (1) PT1888878E (fr)
SI (1) SI1888878T1 (fr)
WO (1) WO2006130889A1 (fr)
ZA (1) ZA200709811B (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012113053A1 (de) * 2012-12-21 2014-06-26 Thyssenkrupp Steel Europe Ag Verbindungsmittel mit Formgedächtnis

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AT501875A1 (de) 2006-12-15
EP1888878B8 (fr) 2012-02-22
PL1888878T3 (pl) 2011-11-30
CA2609737A1 (fr) 2006-12-14
ES2369485T3 (es) 2011-12-01
AU2006255521A1 (en) 2006-12-14
CN101189410A (zh) 2008-05-28
KR20080021616A (ko) 2008-03-07
US20090114402A1 (en) 2009-05-07
ATE514836T1 (de) 2011-07-15
SI1888878T1 (sl) 2011-11-30
ZA200709811B (en) 2008-11-26
JP2008542594A (ja) 2008-11-27
PT1888878E (pt) 2011-09-06
AU2006255521B2 (en) 2011-05-19
AT501875B1 (de) 2008-05-15
EP1888878A1 (fr) 2008-02-20
CA2609737C (fr) 2012-09-25
DK1888878T3 (da) 2011-09-19
WO2006130889A1 (fr) 2006-12-14
US7874380B2 (en) 2011-01-25

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