EP1888878B8 - 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 rocheInfo
- Publication number
- EP1888878B8 EP1888878B8 EP06741019A EP06741019A EP1888878B8 EP 1888878 B8 EP1888878 B8 EP 1888878B8 EP 06741019 A EP06741019 A EP 06741019A EP 06741019 A EP06741019 A EP 06741019A EP 1888878 B8 EP1888878 B8 EP 1888878B8
- Authority
- EP
- European Patent Office
- Prior art keywords
- anchoring element
- drill bit
- drill
- drilling
- borehole
- 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
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title claims abstract description 15
- 239000011435 rock Substances 0.000 title claims abstract description 12
- 239000002689 soil Substances 0.000 title claims abstract description 10
- 238000009527 percussion Methods 0.000 title claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims abstract description 121
- 238000009412 basement excavation Methods 0.000 claims description 6
- 230000003446 memory effect Effects 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 20
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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 drilling, in particular percussion or rotary impact drilling of a hole in soil or rock material and fixing an anchor in the hole, wherein a drill hole is formed by a drill bit mounted on a drill string, as well as to a device for drilling in particular impact or rotary impact drilling of a hole in soil or rock material and fixing an anchor in the hole, wherein a borehole is formed by a drill bit mounted on a drill string.
- the drill pipe can be formed on its outer circumference with additional ribs and grooves, so that when the drill pipe remains in the borehole and a subsequent backfilling a correspondingly good anchor effect can be achieved.
- an armature or an anchoring device is introduced into the borehole, for example from EP-B 0 241 451, US Pat.
- a 4,490,074, DE-AS 21 05 888, US-A 4,310,266, EP-A 0 875 663 and other references embodiments are known in which the subsequently introduced, for example, tubular anchoring by corresponding holding elements on a reduced compared to the final diameter which, after complete insertion into the wellbore, abuts or presses against the borehole wall to achieve a desired anchoring effect.
- a disadvantage of this known prior art on the one hand, the fact that the borehole must be prepared in a first step, and then after removing the drilling tool together with the drill string in a further process step, the anchor device is introduced into the optionally long hole having a borehole, then subsequently An investment in the borehole wall succeeds.
- 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 borehole, in particular at a distance from the drill bit, and that after completion of the borehole, the anchoring element is widened.
- the anchoring element after completion of the well, is additionally expanded in abutment against the borehole wall, a correspondingly secure and reliable anchoring effect immediately after completion of the borehole and in particular without additional steps in contrast to the prior art, where after completion of the drilling Hole removal of the drill string and the drill bit and a subsequent introduction of an anchor element provided with anchoring element provided on the circumference.
- the drill string is withdrawn after completion of the borehole in the direction of the anchoring element and the anchoring element by a drill rod on the side remote from the excavation side of the drill bit Expander element is widened.
- the anchoring element according to the invention frictionally engaged and thus introduced in its position introduced into the interior of the borehole, the drill pipe together with the drill bit can be withdrawn over a the section between the drill bit and the anchoring element corresponding length from the borehole, whereupon the anchoring element is widened by a mounted on the drill string expander in contact with the well and additionally pressed.
- the strength or resistance of the anchoring after widening of the anchoring element be determined, in particular by setting a checking device on the drill string at the end projecting from the borehole.
- 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 abovementioned type is essentially characterized in that the drill string is surrounded by an anchoring element at the rear side facing away from the surface of the drill bit, in particular at a distance from the drill bit, whose outer dimension at least partially exceeds the circumference of the wellbore produced by the drill bit.
- the anchoring element due to the fact that the anchoring element, the outer dimension of which at least partially exceeds the circumference of the wellbore produced by the drill bit, is essentially frictionally inserted into the interior of the wellbore during the drilling operation, a simple provisional securing in the wellbore succeeds to provide.
- a slotted tube or tube which subregions of a reduced outer circumference has fangs or reduced external dimensions, can be partially vary slightly in adaptation to different geological conditions, it is always ensured that a frictional engagement is present at least in some areas and thus a provisional securing the anchoring element during the production of the well can be achieved ,
- the anchoring element is formed with a bevel at its end facing the drill bit.
- a chamfer 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 operation.
- 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 rod is subjected to force, and the drilling process can then be carried out or continued via the upstream drill bit.
- the drill string festergbarer stop which can be fixed to the drill string, can 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 outer dimension. After removal of the expander element from the anchoring element, the anchoring element returns at least partially or in the section facing the drill bit substantially to its original external dimensions, so that 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 shows a schematic partial section through a first embodiment of a device according to the invention for carrying out the method according to the invention during the drilling process.
- Fig. 2 is a side view of the embodiment of FIG. 2;
- Fig. 3 is a front view of the drill bit according to the arrow III in Fig. 1;
- Fig. 4 is a section along the line IV-IV of Fig. 2;
- 5 shows a side view of the embodiment according to FIGS. 1 and 2, wherein the drill string is retracted for at least partial widening of the anchoring element;
- Fig. 6 is a sectional view through the embodiment of FIG. 5; and
- FIG. 7 shows a side view corresponding to FIG. 2 of a modified embodiment of a device according to the invention for carrying out the method according to the invention; and
- FIG. 8 shows a section along the line VIII-VIII of FIG. 7.
- a device for producing a well not shown, generally designated 1, wherein on a particular hollow drill string 2, a drill bit 3 is mounted, which by a drive device, not shown in detail, which projecting from the borehole End of the drill string 2 engages, is driven to a rotating and / or beating movement for producing the well not shown in detail.
- an anchoring element 4 is provided, the outer circumference or outer diameter of den- 3 and 4, wherein it is shown that the diameter D (I) of the drill bit 3 is smaller than the diameter D (2) of the anchoring element 4.
- a widening element 6 is additionally mounted on the drill pipe 2 between the drill bit 3 and the anchoring element 4, which has a cross section tapering or reduced in the direction of the anchoring element 4.
- 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 exceeds the outer circumference of the drill bit 3, as shown in FIGS. 3 and 4, by a maximum of 10 percent, for example about 5 percent.
- Fig. 5 and 6 it is shown how after completion of a drilling operation, the drill string 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 in the direction of Drill bit 3 conically widening expansion element 6, the anchoring element 4 is correspondingly expanded 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 Increasing the securing or anchoring effect the expansion element 6 can be introduced beyond the shown in Fig. 5 and 6 state deeper into the anchoring element 4 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 which, in contrast to the embodiment according to FIGS. 1 to 6, is not provided with a longitudinal slot, but at its outer circumference partial areas of reduced diameter or reduced dimensions 12, which in turn prevent excessive frictional force during the drilling operation.
- 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.
- 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 material, if necessary borrowed, in particular in the area of the drill bit 3 and the anchoring element 4 and 11 applied to further increase the anchoring effect become.
Landscapes
- 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
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
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 |
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 EP1888878B1 (fr) | 2011-06-29 |
EP1888878B8 true 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) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT505189B1 (de) * | 2007-04-19 | 2009-01-15 | Techmo Entw & Vertriebs Gmbh | Vorrichtung zum herstellen eines bohrlochs in gesteinsmaterial |
AT10289U1 (de) | 2007-06-19 | 2008-12-15 | Alwag Tunnelausbau Gmbh | Verfahren und vorrichtung zum bohren eines loches in boden- oder gesteinsmaterial und ausbilden einer verankerung |
AU2008288696B2 (en) * | 2007-08-22 | 2015-07-16 | DSI Underground Australia Pty Limited | Friction bolt assembly |
AT13162U1 (de) * | 2012-04-12 | 2013-07-15 | Dywidag Systems Int Gmbh | Verfahren zum Bohren von Löchern in Boden- bzw. Gesteinsmaterial und zum Festlegen eines Ankers in einem Bohrloch sowie Vorrichtung hierfür |
DE102012113053A1 (de) * | 2012-12-21 | 2014-06-26 | Thyssenkrupp Steel Europe Ag | Verbindungsmittel mit Formgedächtnis |
GB201513485D0 (en) * | 2015-07-30 | 2015-09-16 | Ihc Engineering Business Ltd | Anchoring device and method |
CA3098153A1 (fr) * | 2018-05-03 | 2019-11-07 | Epiroc Drilling Tools Ab | Ancre pour roche hybride a auto-forage |
CN108726400B (zh) * | 2018-08-13 | 2024-09-24 | 山河智能特种装备有限公司 | 一种工程车用锚固机构 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3202034A (en) * | 1963-01-18 | 1965-08-24 | John J Korenchan | Bolt anchorage with loosening preventing means |
US3837258A (en) * | 1970-02-03 | 1974-09-24 | C Williams | Rock bolts |
US3695045A (en) | 1970-02-03 | 1972-10-03 | Chester I Williams | Rock bolts |
DE2611676A1 (de) | 1976-03-19 | 1977-09-29 | Paul Schmidt | Verfahren und vorrichtung zum niederbringen von erdbohrungen fuer erdanker |
DE2653873A1 (de) | 1976-11-26 | 1978-06-01 | Hilti Ag | Verfahren zum setzen eines spreizankers im erdreich |
US4310266A (en) * | 1980-03-10 | 1982-01-12 | Ingersoll-Rand Company | Friction rock stabilizer and method of inserting same in an earth structure bore |
DE3137569A1 (de) | 1981-09-22 | 1983-04-21 | Leybold-Heraeus GmbH, 5000 Köln | Verfahren und vorrichtung zur herstellung von hochreinem stickstoff |
US4490074A (en) | 1982-01-12 | 1984-12-25 | Ingersoll-Rand Company | Friction rock stabilizer and sheathing means, in combination, and method of securing a friction rock stabilizer in an earth bore |
AT387429B (de) | 1986-04-09 | 1989-01-25 | Gd Anker Gmbh & Co Kg | Gebirgsanker |
DE3717024A1 (de) * | 1987-05-21 | 1988-12-01 | Willich F Gmbh & Co | Vorrichtung zum bohren von bohrloechern und injizieren von verfestigungsmaterial |
SE470406B (sv) * | 1991-07-01 | 1994-02-14 | Soilex Ab | Förfarande för att sätta dragstag och ett dragsteg |
EP0948701B1 (fr) | 1996-11-12 | 2002-05-15 | Techmo Entwicklungs- und Vertriebs GmbH | Procede et dispositif pour forer et revetir en meme temps des trous |
US5931606A (en) | 1997-05-02 | 1999-08-03 | Ingersoll-Rand Company | Stabilizer length coding system |
AT408248B (de) | 1997-06-18 | 2001-09-25 | Techmo Entw & Vertriebs Gmbh | Verfahren und vorrichtung zum bohren von löchern |
KR100609938B1 (ko) * | 1998-08-21 | 2006-08-04 | 테크모 엔트비클룽스-운트 페어트립스 게엠베하 | 토양 또는 암석에 구멍을 드릴링하고 배수하기 위한 장치 |
DE50207438D1 (de) | 2001-04-26 | 2006-08-17 | Alwag Tunnelausbau Gmbh | Verfahren und vorrichtung zum bohren eines loches und zum festlegen einer verankerung in einem bohrloch |
US7150324B2 (en) * | 2002-10-04 | 2006-12-19 | Halliburton Energy Services, Inc. | Method and apparatus for riserless drilling |
US20070269274A1 (en) * | 2003-06-03 | 2007-11-22 | Ross Seedsman | Rock Bolt |
AT412802B (de) * | 2003-10-01 | 2005-07-25 | Techmo Entw & Vertriebs Gmbh | Verfahren und vorrichtung zum bohren von löchern in boden- oder gesteinsmaterial |
AU2004284121A1 (en) * | 2003-10-27 | 2005-05-06 | Marcellin Bruneau | Anchor device with an elastic expansion sleeve |
SE529459C2 (sv) | 2004-03-10 | 2007-08-14 | Sandvik Intellectual Property | Borrande apparatur |
AT509159B1 (de) | 2004-03-23 | 2011-09-15 | Alwag Tunnelausbau Gmbh | Verfahren und vorrichtung zum bohren, insbesondere schlag- oder drehschlagbohren, eines lochs in boden- oder gesteinsmaterial und zum ausbilden einer verankerung in dem loch |
AU2005200804B2 (en) * | 2005-02-23 | 2012-10-11 | Fci Holdings Delaware, Inc. | Improved resin groutable expansion anchor and method of installing same |
US20080008553A1 (en) * | 2006-07-10 | 2008-01-10 | Robert Andrew Gillis | Self-drilling anchor screw and method of using the same |
US7566189B2 (en) * | 2007-04-19 | 2009-07-28 | Jennmar Corporation | Mine roof bolt with resin control surface |
-
2005
- 2005-06-07 AT AT0096305A patent/AT501875B1/de not_active IP Right Cessation
-
2006
- 2006-05-30 AT AT06741019T patent/ATE514836T1/de active
- 2006-05-30 ES ES06741019T patent/ES2369485T3/es active Active
- 2006-05-30 WO PCT/AT2006/000220 patent/WO2006130889A1/fr not_active Application Discontinuation
- 2006-05-30 US US11/921,762 patent/US7874380B2/en not_active Expired - Fee Related
- 2006-05-30 CN CNA2006800200158A patent/CN101189410A/zh active Pending
- 2006-05-30 EP EP06741019A patent/EP1888878B8/fr active Active
- 2006-05-30 JP JP2008514995A patent/JP2008542594A/ja not_active Withdrawn
- 2006-05-30 PL PL06741019T patent/PL1888878T3/pl unknown
- 2006-05-30 KR KR1020077027640A patent/KR20080021616A/ko not_active Application Discontinuation
- 2006-05-30 PT PT06741019T patent/PT1888878E/pt unknown
- 2006-05-30 CA CA2609737A patent/CA2609737C/fr not_active Expired - Fee Related
- 2006-05-30 AU AU2006255521A patent/AU2006255521B2/en not_active Ceased
- 2006-05-30 SI SI200631122T patent/SI1888878T1/sl unknown
- 2006-05-30 DK DK06741019.1T patent/DK1888878T3/da active
-
2007
- 2007-11-14 ZA ZA200709811A patent/ZA200709811B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
CA2609737A1 (fr) | 2006-12-14 |
AU2006255521B2 (en) | 2011-05-19 |
US7874380B2 (en) | 2011-01-25 |
WO2006130889A1 (fr) | 2006-12-14 |
SI1888878T1 (sl) | 2011-11-30 |
EP1888878A1 (fr) | 2008-02-20 |
DK1888878T3 (da) | 2011-09-19 |
ZA200709811B (en) | 2008-11-26 |
PL1888878T3 (pl) | 2011-11-30 |
JP2008542594A (ja) | 2008-11-27 |
CA2609737C (fr) | 2012-09-25 |
ES2369485T3 (es) | 2011-12-01 |
PT1888878E (pt) | 2011-09-06 |
AT501875A1 (de) | 2006-12-15 |
EP1888878B1 (fr) | 2011-06-29 |
ATE514836T1 (de) | 2011-07-15 |
AU2006255521A1 (en) | 2006-12-14 |
KR20080021616A (ko) | 2008-03-07 |
AT501875B1 (de) | 2008-05-15 |
US20090114402A1 (en) | 2009-05-07 |
CN101189410A (zh) | 2008-05-28 |
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AT5644U1 (de) | Verfahren und vorrichtung zum bohren eines loches und zum festlegen einer verankerung in einem bohrloch | |
AT7067U1 (de) | Verfahren und vorrichtung zum bohren eines loches und zum festlegen einer verankerung in einem bohrloch | |
DE1955623A1 (de) | Nachschneide- oder Erweiterungsbohrer |
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