WO2005095752A1 - Verfahren und vorrichtung zum bohren von löchern in boden-oder gesteinsmaterial - Google Patents
Verfahren und vorrichtung zum bohren von löchern in boden-oder gesteinsmaterial Download PDFInfo
- Publication number
- WO2005095752A1 WO2005095752A1 PCT/AT2005/000102 AT2005000102W WO2005095752A1 WO 2005095752 A1 WO2005095752 A1 WO 2005095752A1 AT 2005000102 W AT2005000102 W AT 2005000102W WO 2005095752 A1 WO2005095752 A1 WO 2005095752A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drill
- heads
- drill bit
- drilling
- borehole
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000011435 rock Substances 0.000 title claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 23
- 238000010168 coupling process Methods 0.000 claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 claims abstract description 23
- 238000005253 cladding Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 18
- 238000009527 percussion Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 7
- 238000005065 mining Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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
- 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
- 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
- E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/20—Drives for drilling, used in the borehole combined with surface drive
Definitions
- the present invention relates to a method for drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material, a drill hole being formed by a striking and / or rotating movement by means of a drill bit supported on a drill pipe, wherein on the drill bit a plurality of drill heads are provided which are coupled to the drill string and driven independently of one another, and wherein the drill bit is removed from the borehole after completion of the drilling process.
- the present invention further relates to a device for drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material, a drill hole being formed by a striking and / or rotating movement by means of a drill bit mounted on a drill pipe, wherein A plurality of drill heads are provided on the drill bit, which can be coupled to the drill pipe and driven independently of one another.
- Embodiments known It is known, for example, in connection with the insertion of a cladding or lining tube, one into a pilot drill bit and to use a core bit subdivided core bit, whereby boreholes with comparatively large dimensions can thereby be reliably produced.
- a cladding or lining pipe is connected to the ring drill bit surrounding the pilot drill bit, the pilot drill bit being separated from the ring drill bit after completion of the drill hole and removed from the drill hole with the drill pipe, as is the case, for example, with the AT B 408 472 can be removed.
- a disadvantage of this known embodiment is, in particular, the fact that at least the ring bit remains in the borehole and is lost.
- modified embodiments for carrying out the above-mentioned method are known, a plurality of separate drill heads forming a drill bit, for example US Pat. No. 3,870,113, US Pat. No. 2,162,314 and US Pat. No. 2,400 853, DE-A 2 157 282, US Pat. No. 1,461,713 and US Pat. No. 3,773,121.
- a disadvantage of these known embodiments is, in particular, the fact that complex and complicated drive devices are provided for the individual and separate drill heads.
- the present invention aims to further develop a method and a device of the type mentioned at the outset in such a way that the above-mentioned disadvantages are avoided and in particular it is ensured that after the completion of a borehole with a particularly large diameter or large, clear width, the entire drill bit, which has a plurality of drill heads, and the drill pipe can be quickly and reliably removed from the finished borehole.
- the method according to the invention of the type mentioned at the outset is essentially characterized in that after the completion of the drilling process, the drill heads are decoupled from a rigid coupling with the drill pipe and are displaceably mounted in the direction of the center of the borehole.
- the drilling heads can be decoupled from a rigid coupling with the drill string after completion of the drilling process, whereby the rigid or mechanically fixed coupling with the drilling string for carrying out the drilling process and for introducing the mechanical ones required for carrying out the drilling process Forces serves, is lifted, it is subsequently possible in a simple manner to store the drill heads in the direction of the center of the borehole, so that after completion of the borehole and release of the rigid coupling to the drill pipe while reducing the outer diameter of the drill bit limited by the drill heads the entire drill bit with the plurality of drill heads can be removed from the borehole together with the drill pipe.
- the proposed displacement of the individual drilling heads toward the interior or center of the borehole ensures that the elements or drilling heads of the drill bit, which, in order to produce the borehole, had to have a larger diameter than the outer diameter of the simultaneously inserted cladding or jacket tube, can be moved or brought overall into a position which now has an outer dimension that is now reduced compared to the inside diameter of the cladding tube, in order to allow passage of the to enable the entire drill bit with all drill heads and the drill pipe to be removed from the borehole.
- the drill heads are coupled to the drill string via rod or drive elements which can be displaced essentially in the longitudinal direction of the drill bit in the interior of the drill bit.
- rod or drive elements which can be displaced in the longitudinal direction of the drill bit or the drill rod allow a safe and reliable, mechanical or rigid coupling between the drill rod and the individual drill heads, which perform the work of dismantling, in addition, after completion of the borehole or ensure a simple and reliable decoupling from the drilling heads at the end of the drilling process for a further displacement towards the center of the borehole.
- the drill heads be connected to the drill bit via spring elements after decoupling from the drill string or from the drive elements become.
- spring elements allow an essentially automatic displacement of the individual drill heads towards the center of the borehole, so that removal of the drill bit and the drill string is possible quickly and reliably.
- the drill heads are driven in a manner known per se independently of one another in a striking and / or rotating movement.
- the drilling heads are acted upon in a manner known per se with a cooling or flushing fluid, which is preferably in the interior of the drilling heads the drill rod coupling rod elements is supplied.
- the mined material is removed from the excavation area between the drill heads, in particular via passage channels running essentially in the longitudinal direction of the drill bit.
- at least three drill heads are arranged in a manner known per se, distributed essentially symmetrically over the surface of the drill bit.
- a device of the type mentioned at the outset is also essentially characterized in that the drilling heads can be decoupled from a rigid coupling with the drill pipe after the completion of the drilling process and can be displaced towards the center of the borehole.
- the drilling heads can be decoupled from a rigid coupling with the drill pipe after the completion of the drilling process and can be displaced towards the center of the borehole.
- the drill heads can be moved into a position or position having a correspondingly reduced outer circumference in order to allow free passage through the interior of the cladding or. To enable casing pipe, which remains inside the borehole.
- Drill heads are proposed in accordance with a further preferred embodiment that for coupling the drill heads to the drill pipe in the interior of the drill bit, in particular in the longitudinal direction of the same, displaceable rod or drive elements are provided.
- Such linkage or drive elements which can be displaced in particular in the longitudinal direction of the drill bit or the drill string, provide sufficient mechanical coupling for the production of the borehole and, after the borehole has been completed, allow this coupling to be easily removed in order subsequently to make the drill heads displaceable Allow direction to the center of the borehole.
- the drill heads have in particular the rod elements between the drill rod and the spring elements surrounding the drill heads, in particular helical springs, are coupled or can be coupled.
- Such spring elements allow a reliable coupling between the remaining sub-areas of the drill bit and the drill heads as well as a simple and reliable adaptation to the conditions given by the inner wall of the borehole and an optionally existing cladding tube with regard to the simple and quick removal of the drill bit and the Drill pipe required to reduce the external dimensions of the drill heads.
- the drill heads are provided in a manner known per se with outlet openings for a cooling or flushing fluid which can be supplied in particular through the rod elements.
- a cooling or flushing fluid which can be supplied in particular through the rod elements.
- the invention preferably provides that such a cooling or rinsing fluid takes place directly through the drive or rod elements which provide a coupling between the drill rod and the drill head.
- receiving holes for a discharge of mined material are provided between the drill heads on the mining surface of the drill bit, to which passage channels connect in the interior of the drill bit, as is a further preferred embodiment of the invention Device corresponds.
- each drill head can be acted upon by a percussion and / or rotary drive mounted inside the drill bit, which can be supplied with drive energy via the common drill pipe.
- an immediate lining of the borehole is often required during the drilling process, in particular when producing a borehole in at least partially loose soil or rock material. This is to prevent the material from collapsing during the drilling process, which would subsequently prevent the drill pipe and the drill bit from being removed after the borehole has been completed.
- the drill bit is surrounded by a jacket or cladding tube, at least in its end region facing the interior of the borehole.
- FIG. 1 shows schematic side views, partly in section, of individual steps of the method according to the invention using a device according to the invention for drilling holes in soil or rock material, FIG. 1 a showing the drilling process, FIG. 1 b shows the position or position in which the rigid or mechanical coupling between the drill heads and the drill string is released, and FIG. 1c shows the process of withdrawing the drill bit with all drill heads and the drill string after the drill heads have been displaced towards the center of the borehole; FIG. 2 shows a perspective and enlarged illustration of the position of the drill heads similar to the illustration according to FIG. 1b; and
- Fig. 3 in an enlarged scale a top view of the mining area formed by the drill heads, for example in the direction of arrow III of Fig. La.
- each drill bit 2 being driven by a drive or rod element designated by 4 in FIG / or rotary drive is coupled, the hammer 5 being coupled to the drill pipe 3 via a connecting plate 6.
- connecting lines 7 between the drill pipe 3 and the individual hammers 5 are also indicated.
- a cladding or jacket tube 8 is also indicated, which surrounds the drill bit 1 at least in the foremost area, wherein this cladding or jacket tube 8 can optionally also extend substantially over the entire length of the borehole 9, the the inner wall of the borehole that can be produced by the drill heads 2 is schematically designated 9 in FIG.
- both the entire drill bit 1 is around the through the drill string 3 defined, central axis in the direction of arrow 10 can be subjected to a rotational movement, the individual drill heads 2 additionally being able to be subjected to a rotational movement in the direction of arrow 11, so that overall a borehole 9 with a correspondingly large cross section or large, clear width can be produced , 3 it is also indicated that the drill heads are each provided with a plurality of outlet openings 12 for a cooling or rinsing fluid, this cooling or rinsing fluid through a central channel via the drive or.
- Linkage element 4 can be fed to the drill heads.
- removal tools formed by hard material elements or inserts are indicated by 21.
- passages 13 between the individual drill heads 2 or the hammers 5 can be seen in the figures, material which has been removed being discharged through these passage channels 13 and being introduced into the passage channels 13 via passage openings 14.
- the passage channels 13 are extended in a manner not shown in accordance with the length of the borehole to be produced, in order to enable the extracted material to be reliably discharged.
- the rigid or direct, mechanical coupling of the individual drill heads 2 to the drill pipe 3 is interrupted with the interposition of the drive or rod elements 4 and the hammers 5 or uncoupled, with the hammers 5 and the drive or linkage elements 4 coupled to them being pulled back into a position decoupled from the drill heads 2, as can be seen in FIGS. 1b and 2.
- Drill heads at their end 16 facing away from the surface 15 are coupled to articulation elements 18 via spring elements, in particular helical springs 17, so that the resilient mounting of the drill heads 2 now enables the drill heads 2 to be moved and displaced.
- the drill heads 2 are each provided with a bevel 19 on the rear side facing the drill bit 1 or the interior of the borehole, which chamfer ensures reliable entry into the interior of the casing or cladding tube 8 when the Drill bit 1 according to arrow 20, as indicated in Fig. Lc, enables.
- the displacement or displacement of the drill heads 2 in the direction of the center of the borehole 9 to be carried out via the spring elements 17 also permits simple and reliable removal of the entire drill bit 1 with all the drill heads 2 and the drill pipe 3 according to the arrow 20 in FIG. 1c, since the drill heads 2 do not lie against the inner wall of the borehole and can therefore be removed from the borehole 9 quickly and without friction with the inner wall of the borehole.
- Drill heads 2 for example four or more drill heads 2 may be provided in order to enable a correspondingly large excavation area.
- a central drill head could be provided if, for example, different spring lengths ensure that, in particular, the drill heads 2 lying on the outer circumferential edge can be displaced to the interior of the borehole for decoupling from the drill string 3 for removal from the borehole 9.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (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)
- Earth Drilling (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005228906A AU2005228906A1 (en) | 2004-03-30 | 2005-03-22 | Method and device for drilling holes in the ground or in rock |
CA002560829A CA2560829A1 (en) | 2004-03-30 | 2005-03-22 | Method and device for drilling holes in the ground or in rock |
EP05714184A EP1730382A1 (de) | 2004-03-30 | 2005-03-22 | Verfahren und vorrichtung zum bohren von löchern in boden-oder gesteinsmaterial |
JP2007505321A JP2007530832A (ja) | 2004-03-30 | 2005-03-22 | 地面または岩盤に穴を孔ける方法および装置 |
US11/529,359 US7290624B2 (en) | 2004-03-30 | 2006-09-29 | Method and device for drilling holes in soil or rock material |
HR20060365A HRP20060365A2 (en) | 2004-03-30 | 2006-10-24 | Method and device for drilling holes in the ground or in rock |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0056404A AT501696B1 (de) | 2004-03-30 | 2004-03-30 | Verfahren und vorrichtung zum bohren von löchern in boden- oder gesteinsmaterial |
ATA564/2004 | 2004-03-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/529,359 Continuation US7290624B2 (en) | 2004-03-30 | 2006-09-29 | Method and device for drilling holes in soil or rock material |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005095752A1 true WO2005095752A1 (de) | 2005-10-13 |
Family
ID=34964141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2005/000102 WO2005095752A1 (de) | 2004-03-30 | 2005-03-22 | Verfahren und vorrichtung zum bohren von löchern in boden-oder gesteinsmaterial |
Country Status (11)
Country | Link |
---|---|
US (1) | US7290624B2 (de) |
EP (1) | EP1730382A1 (de) |
JP (1) | JP2007530832A (de) |
KR (1) | KR20070011405A (de) |
CN (1) | CN1954130A (de) |
AT (1) | AT501696B1 (de) |
AU (1) | AU2005228906A1 (de) |
CA (1) | CA2560829A1 (de) |
HR (1) | HRP20060365A2 (de) |
WO (1) | WO2005095752A1 (de) |
ZA (1) | ZA200608071B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008072950A2 (en) * | 2006-12-13 | 2008-06-19 | Vertical Development B.V. | Foundation system for the forming of a foundation pile in the ground |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102518393B (zh) * | 2011-12-15 | 2014-01-22 | 贵州航天天马机电科技有限公司 | 一种组合潜孔锤 |
US9657521B2 (en) | 2014-06-02 | 2017-05-23 | King Fahd University Of Petroleum And Minerals | Directional system drilling and method |
CN106194017B (zh) * | 2016-08-26 | 2018-03-16 | 陈后亥 | 一种五金制作用原料开采装置 |
CN106522844B (zh) * | 2016-11-10 | 2018-11-30 | 王天勇 | 十字型冲击钻头结构、含有该结构的旋挖机钻头及其应用 |
EP3336301B1 (de) * | 2016-12-19 | 2023-09-13 | BAUER Maschinen GmbH | Drehbohrwerkzeug und verfahren zum erstellen einer bohrung |
CN106894759B (zh) * | 2017-04-19 | 2019-08-20 | 中海石油(中国)有限公司 | 一种自升式钻井平台桩腿主动刺穿一钻多孔钻头及方法 |
CN110056361B (zh) * | 2019-03-20 | 2020-08-07 | 中铁四局集团有限公司 | 一种超深地层盾构进出洞加固方法 |
CN114577091B (zh) * | 2022-02-24 | 2023-11-03 | 湖南城市学院设计研究院有限公司 | 一种老旧小区改造规划用的墙体结构检测装置 |
CN116296556B (zh) * | 2023-05-06 | 2023-12-22 | 中国地质大学(北京) | 一种露天矿山生态地质环境勘探采样装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2016068A (en) * | 1934-02-17 | 1935-10-01 | Clyde E Bannister | Earth boring device |
FR1407698A (fr) * | 1964-06-10 | 1965-08-06 | Neyrpic Ets | Dispositif de forage pour trous de grand diamètre avec tubage simultané |
CH613491A5 (en) * | 1977-08-24 | 1979-09-28 | Albert Rombaldi | Drilling device |
US4790391A (en) * | 1985-10-04 | 1988-12-13 | Tone Boring Co., Ltd. | Air pressure impact drilling method and apparatus for same |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US901392A (en) * | 1907-05-15 | 1908-10-20 | Russel B Sigafoos | Rotary tunneling-machine. |
US1062050A (en) * | 1911-10-10 | 1913-05-20 | Alfred C Stewart | Well-drilling apparatus. |
US1461713A (en) * | 1921-07-22 | 1923-07-10 | Reni S Berry | Well drill |
US2400853A (en) * | 1941-07-08 | 1946-05-21 | Walter P Stilley | Well drilling apparatus |
US2815932A (en) * | 1956-02-29 | 1957-12-10 | Norman E Wolfram | Retractable rock drill bit apparatus |
US3773121A (en) * | 1970-11-20 | 1973-11-20 | Tone Boring Co | Reaction minimized earth boring |
JPS5117201B1 (de) | 1971-05-13 | 1976-06-01 | ||
US3870113A (en) * | 1974-02-14 | 1975-03-11 | Newell E Slawson | Pneumatic drill apparatus |
CA2036602C (en) | 1990-02-28 | 2001-04-24 | Takeshi Hayashi | Excavation tool |
ZA915502B (en) * | 1990-07-16 | 1992-04-29 | Norncott Pty Ltd | Variable geometry cluster drill |
DE4211048C1 (de) | 1992-04-02 | 1993-05-06 | Boart Hwf Gmbh & Co Kg Hartmetallwerkzeugfabrik, 6419 Burghaun, De | |
AT408472B (de) | 1997-06-18 | 2001-12-27 | Techmo Entw & Vertriebs Gmbh | Verfahren und einrichtung zum bohren und auskleiden von löchern |
SG97991A1 (en) * | 1999-12-03 | 2003-08-20 | Tone Kk | Multiple air hammer apparatus and excavating direction correcting method therefor |
FI115245B (fi) * | 2002-11-18 | 2005-03-31 | Hannu Paasonen | Teräsovitelma iskevään poraan |
-
2004
- 2004-03-30 AT AT0056404A patent/AT501696B1/de not_active IP Right Cessation
-
2005
- 2005-03-22 EP EP05714184A patent/EP1730382A1/de not_active Withdrawn
- 2005-03-22 AU AU2005228906A patent/AU2005228906A1/en not_active Abandoned
- 2005-03-22 KR KR1020067022448A patent/KR20070011405A/ko active IP Right Grant
- 2005-03-22 WO PCT/AT2005/000102 patent/WO2005095752A1/de active Application Filing
- 2005-03-22 CN CNA2005800104387A patent/CN1954130A/zh active Pending
- 2005-03-22 CA CA002560829A patent/CA2560829A1/en not_active Abandoned
- 2005-03-22 JP JP2007505321A patent/JP2007530832A/ja active Pending
-
2006
- 2006-09-28 ZA ZA200608071A patent/ZA200608071B/en unknown
- 2006-09-29 US US11/529,359 patent/US7290624B2/en not_active Expired - Fee Related
- 2006-10-24 HR HR20060365A patent/HRP20060365A2/xx not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2016068A (en) * | 1934-02-17 | 1935-10-01 | Clyde E Bannister | Earth boring device |
FR1407698A (fr) * | 1964-06-10 | 1965-08-06 | Neyrpic Ets | Dispositif de forage pour trous de grand diamètre avec tubage simultané |
CH613491A5 (en) * | 1977-08-24 | 1979-09-28 | Albert Rombaldi | Drilling device |
US4790391A (en) * | 1985-10-04 | 1988-12-13 | Tone Boring Co., Ltd. | Air pressure impact drilling method and apparatus for same |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008072950A2 (en) * | 2006-12-13 | 2008-06-19 | Vertical Development B.V. | Foundation system for the forming of a foundation pile in the ground |
WO2008072950A3 (en) * | 2006-12-13 | 2008-07-31 | Vertical Dev B V | Foundation system for the forming of a foundation pile in the ground |
WO2008072951A3 (en) * | 2006-12-13 | 2008-08-07 | Vertical Dev B V | Drill head for the excavation in the ground of a pit, and a foundation system for the forming of a foundation pile in the ground |
Also Published As
Publication number | Publication date |
---|---|
AT501696B1 (de) | 2008-03-15 |
KR20070011405A (ko) | 2007-01-24 |
CN1954130A (zh) | 2007-04-25 |
JP2007530832A (ja) | 2007-11-01 |
HRP20060365A2 (en) | 2006-11-30 |
US20070023204A1 (en) | 2007-02-01 |
EP1730382A1 (de) | 2006-12-13 |
US7290624B2 (en) | 2007-11-06 |
ZA200608071B (en) | 2007-11-28 |
AU2005228906A1 (en) | 2005-10-13 |
AT501696A1 (de) | 2006-10-15 |
CA2560829A1 (en) | 2005-10-13 |
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