EP0933497B1 - Bohrwerkzeug - Google Patents
Bohrwerkzeug Download PDFInfo
- Publication number
- EP0933497B1 EP0933497B1 EP99100208A EP99100208A EP0933497B1 EP 0933497 B1 EP0933497 B1 EP 0933497B1 EP 99100208 A EP99100208 A EP 99100208A EP 99100208 A EP99100208 A EP 99100208A EP 0933497 B1 EP0933497 B1 EP 0933497B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boring
- helix
- drill
- soil auger
- cutting means
- 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.)
- Expired - Lifetime
Links
- 238000005520 cutting process Methods 0.000 claims description 33
- 239000002689 soil Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 23
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000004181 pedogenesis Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer Methods 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
- E21B10/00—Drill bits
- E21B10/02—Core bits
- E21B10/04—Core bits with core destroying means
Definitions
- the invention relates to a auger for bringing down of drilling in the ground according to the generic term of Claim 1.
- Augers are for example from DE-C-41 32 314 or DE-C-42 09 854 known. These augers have a drill shaft formed coaxially to an axis of rotation on which a drill helix is arranged, which a cutting device at its end pointing in the feed direction which is essentially radial extends to the axis of rotation.
- Such augers usually have one so-called pilots. It is a foregoing Center cutting edge, which is the guide of the tool serves during the drilling process.
- this center cutting edge must have different soil formations be adjusted and thus for a hole be replaced when the soil type or soil formation changes. They also have center cutting edges high wear. You turn at the same angular velocity as the whole Drilling tool. Because of their small radial expansion however, they also move about the axis of rotation, opposite outer areas of the auger, significantly reduced Circumferential speed on the drilling material.
- Drill tips with a U-shaped slot are known.
- the drill bits are for detachable attachment to a twisted Boring bar provided, a maximum in DE-PS-807 271 Outside diameter of the drill tip is specified as 42.9 mm.
- the one that forms when drilling in the U-shaped slot thin core is processed through the slot base.
- Out DE-PS-583 046 and DE-PS-600 676 are further such Rotary drill known, but which is asymmetrical are. Due to the asymmetrical training the core formed in the slot is further reduced and to be removed more easily.
- the invention has for its object to provide a auger, which is characterized by low wear and good guidance during drilling.
- a key concept of the invention can therefore be seen in that by dispensing with a center cutting edge centric drill core is formed during drilling. From one the core meets the deflecting surface and is directed by this into the production area of the drill helix. A wear-prone pilot who is for a straight forward Propulsion of the auger is no longer necessary required. The auger is guided by the supports forming drill core.
- a particularly quiet and straightforward propulsion of the auger is achieved in that two coils with a cutting device are provided that the Cutting devices are constructed essentially the same and that the cutters are at an angle of approximately Are arranged 180 ° to each other. in principle more cutting devices can also be provided, for example three or four.
- a light and inexpensive embodiment of the subject matter of the invention is achieved in that the drill coils have different dimensions in the axial direction. This means that several cutting edges are available for the drilling process. To convey the drilling material out of the borehole however only a few coils or a single coiler educated.
- At least two Drill coils only along a first drill coil an axial portion of the drill shaft extends, while a second helix substantially along the entire drill shaft is formed.
- this embodiment by conveying the drilling material along the entire length of the drilling tool with a single drill helix out.
- first drill helix exclusively at the end of the drill shaft pointing in the feed direction is formed and that the first drill helix is not has more than one turn. This can reduce the weight of the drilling tool can be further reduced while the second drill helix to convey the drilling material in one wide area takes over.
- An advantageous development of the subject matter of the invention is characterized in that by the deflecting surface the drill core that forms can be derived into an intermediate space, the one between the first drill helix and the second drill helix is formed.
- the core is thus turned into a flow of cuttings between the first drill helix and the second Drill helix derived. This will make it faster and reliable removal of the distracted and broken off Part of the drill core ensured.
- the deflection surface be a free-form surface is trained. So it is possible to change the flow behavior of the core as it moves along the Deflection surface as well as when it enters the area to influence the drilling coils positively.
- the lowest possible friction due to the deflected core is achieved in that the deflecting surface about as a portion of a helical shape Surface is designed.
- the deflecting surface at least is partially formed on an insert and that the insert is firmly connected to the tubular shaft.
- a auger 10 shown in Figure 1 is already partly in a feed direction A into a floor 23 advanced.
- a first drill helix 12 and a second Drill helix 13 coaxially wind around a cylindrical one Drill shaft 11.
- the rotary movement about an axis of rotation 14 and a feed movement of the earth drilling tool is from a drive device not shown in FIG a fastening device 15 on the auger 10 transfer.
- These cutters 16 are opposite the axis of rotation 14 of the auger 10 radially spaced so that the auger 10 has a cutting-free center 17.
- a drill core 19 which is supported by a drill shaft 11 deflecting surface 18 attached obliquely to the axis of rotation 14 into a Delivery area 20 between the coils 12 and 13 deflected becomes.
- a smooth running of the auger 10 is ensured that the two cutters 16 essentially are formed symmetrically to the axis of rotation 14, and the first drill helix 12 more than half a turn around the Has axis of rotation 14.
- the cutting geometries are approximate symmetrical, but not the radial distances between the teeth 21 from the axis of rotation 14. By a radial offset of the opposite teeth will be even over the radius Cutting performance achieved.
- the drilling coils 12 and 13 thus remove drilling material from the Working area of the cutting devices 16.
- the drilling material over the entire conveying area the auger 10 is transported, the drill only a small amount from the first drill helix 12 Conveyed height to then from the second drill helix 13 to be transported further.
- the drill core 19 is directed from the deflecting surface 18 kinked on the second drill helix 13, broken off or distracted.
- FIGS. 2 to 6 An insert 30 is shown schematically in FIGS. 2 to 6, on which the deflection surface is a free-form surface 31 is trained.
- This insert 30 is fixed with a tubular Connected shaft, also known as the soul tube becomes.
- the insert 30 has essentially the shape of a Rotation axis 14 coaxial cylinders.
- the free-form surface 31 educated. It forms two, roughly opposite one another Outbreaks 32 and 33 of different sizes in the Lateral surface of the cylinder.
- the free-form surface 31 is in the essentially as a gutter with an arched bottom line designed between the outbreaks 32 and 33.
- the direction of rotation corresponds to the bottom line the direction of rotation of the coils and the Inclination of the bottom line with respect to the axis of rotation 14 runs steadily.
- V-grooves 35 There is a channel wall on each side of the channel provided which is the same height in the axial direction have and their main cutting ends flattened are. In each of these main cutting ends a rectified V-groove 35 is formed, the V-grooves 35 arranged substantially diametrically opposite are.
- the V-grooves 35 of course, too be designed as differently shaped grooves or several grooves can, for fastening the insert 30 in the soul tube or serve to accommodate the cutting devices.
- the fixation of the insert 30, on the high torque act takes place in that the radially inner ends of the Engage the cutting devices in the V-grooves 35 in a form-fitting manner.
- An opening 36 formed in the freeform surface 31 enables it, flushing or cooling liquids in the area to introduce the free-form surface 31.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Steroid Compounds (AREA)
- Saccharide Compounds (AREA)
- Drilling Tools (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Drilling And Boring (AREA)
- Surgical Instruments (AREA)
Description
- Fig. 1
- eine teilweise geschnittene Seitenansicht einer erfindungsgemäßen Bohrschnecke beim Bohrvorgang;
- Fig. 2 bis 6
- perspektivische Ansichten eines erfindungsgemäßen Einsatzes, an dem die Ablenkfläche ausgebildet ist.
Claims (7)
- Bohrschnecke zum Niederbringen von Bohrungen in den Erdbodenmit einem koaxial zu einer Drehachse (14) ausgebildeten rohrförmigen Bohrschaft (11),an dessen Außenseite eine Bohrwendel (13) angebracht ist,welche an ihrem in Vorschubrichtung (A) weisenden Ende eine Schneideinrichtung (16) aufweist,welche sich im wesentlichen radial zur Drehachse (14) erstreckt,wobei die im wesentlichen radial verlaufende Schneideinrichtung (16) zum Bilden eines schneidenfreien Zentrums (17) von der Drehachse (14) radial beabstandet ist, unddie Schneideinrichtung (16) in Vorschubrichtung (A) gegenüber dem schneidenfreien Zentrum (17) vorsteht,daß das schneidenfreie Zentrum (17) als eine zur Drehachse (14) schräg verlaufende, konkave Ablenkfläche (18) ausgebildet ist,daß zumindest zwei Bohrwendeln (12, 13) vorgesehen sind, von denen eine erste Bohrwendel (12) lediglich entlang eines axialen Teilbereiches des Bohrschaftes (11) an dessen in Vorschubrichtung (A) weisenden Ende angeordnet ist, während sich die zweite Bohrwendel (13) im wesentlichen entlang des gesamten Bohrschaftes (11) erstreckt, unddaß die Ablenkfläche zum Ableiten eines sich beim Bohren bildenden Bohrkerns (19) in einen Förderbereich (20) der Bohrwendeln (12, 13) ausgebildet ist.
- Bohrschnecke nach Anspruch 1,
dadurch gekennzeichnet, daß zwei Bohrwendeln (12, 13) mit jeweils einer Schneideinrichtung (16) vorgesehen sind, daß die Schneideinrichtungen (16) im wesentlichen gleich aufgebaut sind und daß die Schneideinrichtungen (16) mit einem Winkel von ungefähr 180° zueinander angeordnet sind. - Bohrschnecke nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die erste Bohrwendel (12) nicht mehr als eine Windung aufweist. - Bohrschnecke nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß ausschließlich entlang des schneidenfreien Zentrums (17) zwei Bohrwendeln (12, 13) an einem gemeinsamen Axialabschnitt des Bohrschaftes (11) angebracht sind, und daß durch die Ablenkfläche (18) der sich bildende Bohrkern (19) in einen Zwischenraum ableitbar ist, der zwischen der ersten Bohrwendel (12) und der zweiten Bohrwendel (13) gebildet ist. - Bohrschnecke nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Ablenkfläche (18) als Freiformfläche (31) ausgebildet ist, durch welche eine Rinne mit bogenförmiger Bodenlinie gebildet ist. - Bohrschnecke nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Ablenkfläche (18) etwa als ein Teilbereich einer helixförmigen Fläche gestaltet ist. - Bohrschnecke nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Ablenkfläche (18)zumindest teilweise an einem Einsatz (30) ausgeformt ist und daß der Einsatz (30) fest mit dem rohrförmigen Bohrschaft (11) verbindbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29801700U DE29801700U1 (de) | 1998-02-02 | 1998-02-02 | Bohrwerkzeug |
DE29801700U | 1998-02-02 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0933497A2 EP0933497A2 (de) | 1999-08-04 |
EP0933497A3 EP0933497A3 (de) | 2000-07-12 |
EP0933497B1 true EP0933497B1 (de) | 2003-08-20 |
Family
ID=8052069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99100208A Expired - Lifetime EP0933497B1 (de) | 1998-02-02 | 1999-01-07 | Bohrwerkzeug |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0933497B1 (de) |
AT (1) | ATE247765T1 (de) |
DE (2) | DE29801700U1 (de) |
ES (1) | ES2205605T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202015102848U1 (de) | 2014-08-12 | 2015-06-30 | Bauer Maschinen Gmbh | Kernbohrwerkzeug zum Gesteinsbohren |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1512841A (en) * | 1921-11-29 | 1924-10-21 | William F Greiner | Coal drill |
US3095051A (en) * | 1961-11-24 | 1963-06-25 | Raymond Concrete Pile Co | Earth boring auger and sampler |
DE3422541A1 (de) * | 1984-06-18 | 1985-12-19 | Westfälische Berggewerkschaftskasse, 4630 Bochum | Verfahren und vorrichtung zur gewinnung von oertlich und zeitlich bestimmbaren proben einer geologischen formation |
-
1998
- 1998-02-02 DE DE29801700U patent/DE29801700U1/de not_active Expired - Lifetime
-
1999
- 1999-01-07 ES ES99100208T patent/ES2205605T3/es not_active Expired - Lifetime
- 1999-01-07 DE DE59906619T patent/DE59906619D1/de not_active Expired - Lifetime
- 1999-01-07 EP EP99100208A patent/EP0933497B1/de not_active Expired - Lifetime
- 1999-01-07 AT AT99100208T patent/ATE247765T1/de active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202015102848U1 (de) | 2014-08-12 | 2015-06-30 | Bauer Maschinen Gmbh | Kernbohrwerkzeug zum Gesteinsbohren |
DE102014111500A1 (de) | 2014-08-12 | 2016-02-18 | Bauer Maschinen Gmbh | Kernbohrwerkzeug und Verfahren zum Gesteinsbohren |
Also Published As
Publication number | Publication date |
---|---|
ATE247765T1 (de) | 2003-09-15 |
DE59906619D1 (de) | 2003-09-25 |
EP0933497A2 (de) | 1999-08-04 |
DE29801700U1 (de) | 1998-03-26 |
ES2205605T3 (es) | 2004-05-01 |
EP0933497A3 (de) | 2000-07-12 |
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