EP2011958B1 - Tarière - Google Patents
Tarière Download PDFInfo
- Publication number
- EP2011958B1 EP2011958B1 EP07013318A EP07013318A EP2011958B1 EP 2011958 B1 EP2011958 B1 EP 2011958B1 EP 07013318 A EP07013318 A EP 07013318A EP 07013318 A EP07013318 A EP 07013318A EP 2011958 B1 EP2011958 B1 EP 2011958B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting edge
- drilling axis
- helix
- auger
- cutting
- 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.)
- Not-in-force
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 101
- 239000002689 soil Substances 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 64
- 239000000463 material Substances 0.000 claims description 14
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims 2
- 230000007423 decrease Effects 0.000 abstract description 7
- 125000006850 spacer group Chemical group 0.000 description 8
- 239000011295 pitch Substances 0.000 description 5
- 230000036346 tooth eruption Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 235000011437 Amygdalus communis Nutrition 0.000 description 1
- 241000220304 Prunus dulcis Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 235000020224 almond Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- 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
- E21B7/201—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means
Definitions
- the invention relates to an auger according to the preamble of claim 1.
- Such auger is formed with a drill shank extending coaxially to a drilling axis, wherein in a lower portion of the drill shank, processing means are provided for working off existing soil material and in an upper region of the Bohrschaftes a connecting device for a rotary drive is provided, a coil which extends along the drill shank, and a cutting edge, which is provided in particular in a lower portion of the helix, wherein the cutting edge is at least partially degressive, wherein a distance of the cutting edge of the drilling axis decreases with increasing height of the cutting edge along the drilling axis, and wherein the helix has an outer edge which, at least at the level of the cutting edge, extends on a cylinder jacket surface.
- Such an auger is for example from the US 3,995,706 known.
- the drill known from this document is intended to pass through particularly hard soil layers.
- Another auger is for example from the DE 10 2005 011 120 A1 known.
- This document describes a worm drill with a drilling helix, which is formed in a bottom tapered region helically tapering towards the drill bit, wherein in this tapering region along an outer edge of the drill helix a cutting edge is formed with drill teeth.
- augers with helices which are provided on a the ground to be processed lower side processing means with cutting teeth, are from the US 4,553,612 , of the US 4,228,862 and the EP 1 085 166 A1 known.
- the object of the invention is to provide an auger with a particularly high cutting performance with high stability, which is particularly suitable for drilling hard rock layers.
- the cutting edge is degressive at least in sections, wherein a distance of the cutting edge of the drilling axis decreases with increasing height of the cutting edge along the drilling axis.
- a basic idea of the invention can be seen to provide, at the lower end of the helix, a cutting edge running obliquely to the drilling axis, the radial distance of which from the drilling axis pointing upwards, i. especially with increasing distance from the upcoming soil, decreases.
- This basic idea of the invention makes it possible, for example, to design the cutting edge in such a way that, when the auger is operating at the bottom of the borehole, a rock projection projecting conically towards the drill is produced coaxially with the drilling axis. This projection can be used to guide the auger during further drilling, so that a particularly precise bore with high cutting performance is possible.
- the processing means may, for example, be cutting teeth.
- the rotary drive is used to rotate the auger around the drilling axis. It can be designed in particular as a hydraulic rotary drive.
- the connecting device may for example be a detachable polygonal coupling, by means of which the drill shaft with a drill pipe or directly to the rotary drive rotatably connected.
- the cutting action can be improved by making the cutting edge concavely curved.
- This may in particular be understood to mean that the cutting edge is curved in the helix.
- the cutting edge in drilling operation projects in its radially inner and / or its radially outer regions with respect to the edge center.
- material worked off by the cutting edge is not radially displaced away from the cutting edge, but is conveyed towards the center of the cutting edge, so that a particularly effective comminution of soil material is possible.
- the cutting edge may in particular be helical or spiral-shaped.
- a radius of curvature of the cutting edge increases with increasing distance from the drilling axis.
- the cutting edge in the region of the drilling axis in plan view extend approximately radially to the drilling axis, with increasing distance from the drilling axis, a direction component in the circumferential direction to the drilling axis increases more and more.
- the cutting edge in the vicinity of the drilling axis can be made steeply to the upcoming ground.
- Radially outward, ie to areas in which the speed is greater with rotation, the angle of attack can be flatter and flatter. In particular, this makes it possible to ensure that each cutting edge section has to cope with approximately the same cutting volume during operation, and thus a uniform load along the cutting edge is provided.
- variable radius of curvature can be provided that the cutting edge has the shape of a spiral portion which tapers with increasing height.
- a variable radius of curvature allows in particular to choose the radius of curvature in the region of the drilling axis smaller than half the cross-sectional radius of the auger.
- the cutting edge is suitably designed so that the curve formed by it intersects the drilling axis.
- the cutting performance can be further improved by providing cutting tools on the cutting edge.
- the cutting tools may be, for example, cutting teeth, in particular around round shank bits and / or flat teeth.
- the cutting tools are preferably fixed at an angle to the cutting edge. In particular, they can be arranged on the cutting edge projecting downwards.
- recesses in the helix are suitably provided on the cutting edge, in which the cutting tools are mounted.
- the distances between adjacent cutting tools on the cutting edge are suitably chosen so that each cutting tool has to handle about the same cutting volume. As a result, a uniform stress on the cutting tools can be obtained. For this reason in particular, it is advantageous that a spacing of adjacent cutting tools varies with the distance of the cutting edge from the drilling axis and / or the radius of curvature of the cutting edge. For example, it can be provided that a spacing of adjacent cutting tools increases at least in sections as the spacing of the cutting edge from the drilling axis and / or with increasing radius of curvature increases.
- the helix it is advantageous for the helix to begin at a distance from the drill shaft in a radially outer region in the lower region and / or in the region of the cutting edge, to approach the drilling axis more and more radially with increasing height along the drilling axis, and in particular with a further increasing height finally reaching the drill shaft. It is particularly preferred that the helix width measured in particular in the radial direction in the region of the cutting edge increases with increasing height along the drilling axis. With such an arrangement, a particularly good drilling progress can be achieved.
- the slope, i. the pitch of the helix is suitably constant at least at the level of the cutting edge.
- the helix has an outer edge which, at least at the level of the cutting edge, extends on a cylinder jacket surface.
- the helix can extend from the cylinder jacket surface and widen with increasing height ever wider, so that it comes closer and closer to the drilling axis.
- a jacket tube is provided, with which the helix is connected at its outer edge, in particular welded.
- the jacket tube can stabilize the helix, which is particularly advantageous when the helix is spaced from the drill shank in the region of its cutting edge.
- the jacket tube and / or the drill shank are suitably arranged coaxially to the drilling axis.
- the helix may be offset upwards relative to the lower end face of the jacket tube.
- the jacket tube is not flat at its upper end but helical completed, the helical end edge can preferably follow the helix.
- cutting tools are provided on the front side, in particular on the lower end side, on the jacket tube. These may be, for example, cutting teeth, in particular round shank bits.
- the caliber tools may be, in particular, caliber ledges that run, for example, parallel to the drilling axis.
- caliber tools By provided on the cylinder outer surface caliber tools can be counteracted setting of cuttings between casing pipe and borehole.
- the cutting performance can be further increased by providing two coils each having at least one cutting edge at least in the lower region of the earth borer.
- both cutting edges are formed as described and arranged in particular axially symmetrical.
- the material costs for the auger can be reduced while maintaining good cutting performance, that the helices have a different height.
- the auger has two spirals in the region of the jacket tube, only one of which extends upward for further conveying the cuttings along the drill shank, while the second ends in the region of the jacket tube.
- the height of the shorter second coil may be about one to one two pitches amount. If two coils are provided, their cutting edges are suitably arranged at the same height. If the second coil is formed shorter than the first coil can also be provided to arrange the second coil longitudinally offset to the drill shaft. The second coil can be carried in particular by the outer jacket tube.
- a guide tube is provided in the upper region of the drill shank, which surrounds the drill shank in particular coaxially.
- This guide tube can guide the auger radially on the borehole wall, so that particularly high contact pressures are possible with high directional stability.
- the guide tube and the jacket tube have at least approximately the same outer diameter, so that both tubes can fulfill a guiding function.
- the guide tube is suitably axially spaced from the jacket tube.
- the auger can accommodate a particularly large amount of material in its helix, it can be provided that at least one of the helices extends into the guide tube.
- the helix can be radially spaced from the guide tube and in particular at the level of the guide tube upwardly have a radial taper.
- the guide tube may have a taper in its upper region, wherein the tube diameter towards the top, in particular conical, decreases. This can be counteracted tilting of the guide tube in the borehole while pulling the auger. Due to the radial taper, the guide tube may have a bell-shaped form. At the upper end side of the guide tube, a radial, e.g. be provided annular element.
- At least one spacer extending radially to the drilling axis can be provided between the guide tube and the drill shank, which spacer can in particular be of annular design.
- plate-like spacers may be provided between the guide tube and the drill shank, which extend axially and radially to the drilling axis, and which are arranged in particular like ribs and / or star-shaped.
- At least one passage opening is provided in at least one spacer and / or in the guide tube, which allows a passage of material, in particular a water and / or air passage, during operation of the auger in the borehole and thus reduces the applied axial and / or rotational forces.
- the earth drill according to the invention can be provided in particular for large drilling rigs.
- the helix may have a diameter of 0.5 m or more.
- the helix is suitably welded to the drill shank.
- an earth boring device can be provided with a chassis on which the auger invention is rotatably mounted and axially displaceable.
- the invention also relates to a method for creating a hole in the ground, which is characterized in that an earth drill according to the invention is rotated about the drilling axis and retracted in the direction of the drilling axis, in particular repeatedly, into the ground, wherein processed with the cutting edge pending soil material is and the processed material is preferably stored in the helix.
- FIGS. 1 to 4 An embodiment of an earth drill according to the invention is shown schematically in the FIGS. 1 to 4 shown.
- the illustrated auger has a cylindrical tube-shaped drill shank 2, in the upper region 11 of which a connecting device 6 designed as a square coupling is provided is provided for producing a rotationally fixed connection with a rotary drive, not shown in the figures.
- a connecting device 6 designed as a square coupling is provided for producing a rotationally fixed connection with a rotary drive, not shown in the figures.
- the drill shank 2 can be set in rotation about the drilling axis 1 arranged centrally and coaxially with the drill shank 2.
- the auger also has a first helix 21 which extends along the drill shank 2 and which is welded to the outer wall of the drill shank 2. Offset by an angle of 180 ° about the drilling axis 1 to the first helix 21, a second helix 22 is provided on the drill shank 2, which is also welded to the drill shank 2.
- the two helices 21 and 22 are formed as worm helices and have the same pitch and at least in the lower region 12 of the drill shank 2 also the same diameter.
- the second helix 22 has a smaller height, wherein the height of the second helix 22 may preferably be one to two pitches.
- a cylindrical jacket tube 30 is provided, which surrounds the drill shank 2 in regions coaxially, but also projecting axially beyond the drill shank 2 downwards.
- This jacket tube 30 is connected at the outer edge 25 of the first coil 21 to the first coil 21 and connected to the outer edge 26 of the second coil 22 with the second coil 22, wherein the connection is preferably a welded connection.
- the jacket tube 30 is thus held by means of the helices 21 and 22 on the drill shaft 2.
- the almond tube 2 is substantially flat finished.
- the connecting device 6 facing end of the jacket tube 30 follows the coils 21 and 22 and ends along the outer edges 25 and 26, so that the jacket tube 30 is completed helically on its upper side.
- the height of the jacket tube 30 in the direction of the drilling axis 1 is approximately a pitch of the helix 21 and / or 22.
- the coils 21, 22 begin in the lower portion 12 of the drill shank 2 on the casing tube 30 and widen with increasing height (arrow h in Fig. 3 ) in the radial direction to the drilling axis 1, wherein they continue to remain connected at its outer edge 25 and 26 with the jacket tube 30.
- cutting edges 23 and 24 are formed on the helices 21, 22, the radial distance to the drilling axis 1 with increasing height (arrow h in Fig. 3 ), and which are convexly curved into the helix 21 or 22, respectively.
- the radius of curvature of the cutting edges 23 and 24 thereby decreases with increasing distance from the drilling axis 1.
- the cutting edges 23 and 24 are thus degressive, ie their distance from the drilling axis 1 decreases with increasing height along the drilling axis 1 from.
- the degressive cutting edges 23 and 24 at the inner edges of the helices 21 and 22 point inwards and upwards.
- FIGS. 1 . 3 and 4 show how the particular FIGS. 1 . 3 and 4 show, the curved cutting edges 23 and 24 are occupied along its extension with a series of cutting tools 27, which are formed as a round shank chisel. As in Fig. 4 is shown, recesses 29 are provided for receiving the trained as a round shank cutting tools 27 at the cutting edges 23 and 24.
- caliber tools 39 designed as caliber strips are provided on the jacket tube 30, which extend along the drilling axis 1 and counteract the setting of cuttings.
- a further cutting tool 61 is provided in the lower region 12 on the front side of the drill shaft 2, which is connected via a conical adapter element 62 with the drill shank 2.
- a guide tube 50 is provided which surrounds the drill shank 2 coaxially.
- the first coil 21 extends under diameter taper into the guide tube 50, while the second coil 22 ends below the guide tube 50.
- the guide tube 50 has a tapering region 51, in which the tube 50 tapers conically upwards.
- annular spacer 53 For fixing the guide tube 50 to the drill shank 2, an annular spacer 53 is provided, which extends radially with respect to the drill axis 1 from the drill shank 2 to the guide tube 50. Further, 53 axially extending plate-shaped rib members 54 are provided perpendicular to the spacer 53 above the spacer, which also extend from the drill shank 2 to the guide tube 50 back. Both in the spacer 53 and in the rib members 54 through openings 55 and 56 are provided, which allow a flow of liquid during operation of the auger.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Transplanting Machines (AREA)
- Separation By Low-Temperature Treatments (AREA)
Claims (11)
- Tarière, comprenant- une tige de forage (2) qui s'étend de manière coaxiale par rapport à un axe de forage (1),- dans laquelle des moyens d'enlèvement sont prévus dans une zone inférieure (12) de la tige de forage (2) pour enlever le matériau du sol présent et un dispositif de jonction (6) pour un entraînement rotatif est prévu dans une zone supérieure (11) de la tige de forage (2),- une vis (21, 22) qui s'étend le long de la tige de forage (2), et- un bord de coupe (23, 24) qui est prévu dans une partie inférieure de la vis (21, 22),- dans lequel le bord de coupe (23, 24) est réalisé dégressif au moins par sections, une distance du bord de coupe (23, 24) depuis l'axe de forage (1) diminuant quand la hauteur du bord de coupe (23, 24) augmente le long de l'axe de forage (1), et- dans lequel la vis (21, 22) comprend un bord extérieur (25, 26) qui, au moins à la hauteur du bord de coupe (23, 24), s'étend sur une surface d'enveloppe cylindrique,
caractérisée- en ce qu' au moins à la hauteur du bord de coupe (23, 24), il est prévu un tube d'enveloppe (30), et- en ce que la vis (21, 22) est reliée au tube d'enveloppe (30) au niveau de son bord extérieur (25, 26). - Tarière selon la revendication 1, caractérisée en ce que le bord de coupe (23, 24) est réalisé avec une courbure concave.
- Tarière selon la revendication 2, caractérisée en ce qu' un rayon de courbure du bord de coupe (23, 24) augmente quand la distance depuis l'axe de forage (1) augmente.
- Tarière selon l'une quelconque des revendications précédentes, caractérisée en ce que des outils de coupe (27) sont prévus sur le bord de coupe (23, 24).
- Tarière selon la revendication 4, caractérisée en ce qu' une distance entre outils de coupe (27) voisins varie en fonction de la distance entre le bord de coupe (23, 24) et l'axe de forage (1) et/ou avec le rayon de courbure du bord de coupe (23, 24).
- Tarière selon l'une quelconque des revendications précédentes, caractérisée en ce que la largeur de la vis (21, 22) au niveau du bord de coupe (23, 24) augmente quand la hauteur augmente le long de l'axe de forage (1).
- Tarière selon l'une quelconque des revendications précédentes, caractérisée en ce que des outils de coupe (37) sont prévus de manière frontale sur le tube d'enveloppe (30).
- Tarière selon l'une quelconque des revendications précédentes, caractérisée en ce que des outils de calibrage (39) sont prévus de manière périphérique sur le tube d'enveloppe (30).
- Tarière selon l'une quelconque des revendications précédentes, caractérisée
en ce qu' au moins dans la zone inférieure de la tarière, deux vis (21, 22) avec chacune un bord de coupe (23, 24) sont prévues, et
en ce que les vis (21, 22) présentent des hauteurs différentes. - Tarière selon l'une quelconque des revendications précédentes, caractérisée en ce que dans la zone supérieure (11) de la tige de forage (2) est prévu un tube de guidage (50) qui entoure coaxialement la tige de forage (2).
- Procédé de réalisation d'un forage dans le sol, caractérisé en ce qu' une tarière selon l'une quelconque des revendications précédentes est mise en rotation autour de l'axe de forage (1) et est enfoncée dans le sol dans la direction de l'axe de forage (1), le matériau de sol présent étant enlevé avec le bord de coupe (23, 24).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE502007001500T DE502007001500D1 (de) | 2007-07-06 | 2007-07-06 | Erdbohrer |
EP07013318A EP2011958B1 (fr) | 2007-07-06 | 2007-07-06 | Tarière |
ES07013318T ES2331435T3 (es) | 2007-07-06 | 2007-07-06 | Perforador de terreno. |
AT07013318T ATE442511T1 (de) | 2007-07-06 | 2007-07-06 | Erdbohrer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07013318A EP2011958B1 (fr) | 2007-07-06 | 2007-07-06 | Tarière |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2011958A1 EP2011958A1 (fr) | 2009-01-07 |
EP2011958B1 true EP2011958B1 (fr) | 2009-09-09 |
Family
ID=38656996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07013318A Not-in-force EP2011958B1 (fr) | 2007-07-06 | 2007-07-06 | Tarière |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2011958B1 (fr) |
AT (1) | ATE442511T1 (fr) |
DE (1) | DE502007001500D1 (fr) |
ES (1) | ES2331435T3 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITRA20090010A1 (it) * | 2009-03-18 | 2010-09-19 | Randi Renzo E C S N C | Accorgimenti per la stabilita' dei pali infissi nel terreno. |
EP2719832B1 (fr) * | 2012-10-15 | 2015-03-25 | BAUER Maschinen GmbH | Tête de découpage |
CN110159264A (zh) * | 2018-01-15 | 2019-08-23 | 高强 | 一种地质勘探用硬岩土层取样钻头 |
CN110552645B (zh) * | 2019-09-30 | 2024-06-18 | 北京三一智造科技有限公司 | 钻具 |
CN111911094A (zh) * | 2020-07-24 | 2020-11-10 | 中铁第四勘察设计院集团有限公司 | 一种钻杆装置及清除地下锚索的方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3763942A (en) * | 1972-02-25 | 1973-10-09 | Contracting & Material Co | Auger head |
CA1038854A (fr) * | 1975-02-27 | 1978-09-19 | Kenneth M. White | Tariere de creusage du sol |
FR2408693A1 (fr) * | 1977-11-15 | 1979-06-08 | Causse Antoine | Outil de carottage a clapets pour le creusement de trous dans le sol |
US4553612A (en) * | 1983-11-09 | 1985-11-19 | Durham Marion E | Earth boring machine |
DE29612342U1 (de) * | 1996-07-16 | 1996-09-12 | Bauer Spezialtiefbau Gmbh, 86529 Schrobenhausen | Progressivschnecken-Bohrer |
DE19702137A1 (de) * | 1997-01-22 | 1998-07-23 | Fundex N V | Erdverdrängungsbohrer |
FR2798420B1 (fr) * | 1999-09-15 | 2001-12-14 | Cie Du Sol | Outil de forage muni d'un tubage |
EP1564367B1 (fr) * | 2004-02-16 | 2006-08-30 | Beheersmaatschappij Verstraeten B.V. | Trepan de forage |
DE102005011120B4 (de) * | 2004-03-26 | 2006-10-26 | Bauer Maschinen Gmbh | Schneckenbohrer |
US7357200B2 (en) * | 2005-09-29 | 2008-04-15 | Harleman Ronald E | Earth auger |
-
2007
- 2007-07-06 EP EP07013318A patent/EP2011958B1/fr not_active Not-in-force
- 2007-07-06 ES ES07013318T patent/ES2331435T3/es active Active
- 2007-07-06 AT AT07013318T patent/ATE442511T1/de active
- 2007-07-06 DE DE502007001500T patent/DE502007001500D1/de active Active
Also Published As
Publication number | Publication date |
---|---|
DE502007001500D1 (de) | 2009-10-22 |
ATE442511T1 (de) | 2009-09-15 |
ES2331435T3 (es) | 2010-01-04 |
EP2011958A1 (fr) | 2009-01-07 |
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