EP0429130B1 - Bohrspitze und Grundbohrvorrichtung. - Google Patents

Bohrspitze und Grundbohrvorrichtung. Download PDF

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Publication number
EP0429130B1
EP0429130B1 EP90203015A EP90203015A EP0429130B1 EP 0429130 B1 EP0429130 B1 EP 0429130B1 EP 90203015 A EP90203015 A EP 90203015A EP 90203015 A EP90203015 A EP 90203015A EP 0429130 B1 EP0429130 B1 EP 0429130B1
Authority
EP
European Patent Office
Prior art keywords
drill point
pipe
drill
helical
point
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
Application number
EP90203015A
Other languages
English (en)
French (fr)
Other versions
EP0429130A1 (de
Inventor
Monique Julia Jozef Achiel Van Bosch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIJKELKAMP AGRISEARCH EQUIPMENT B.V. TE GIESBEEK.
Original Assignee
van Bosch, Monique Julia Jozef Achiel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by van Bosch, Monique Julia Jozef Achiel filed Critical van Bosch, Monique Julia Jozef Achiel
Priority to AT90203015T priority Critical patent/ATE101674T1/de
Publication of EP0429130A1 publication Critical patent/EP0429130A1/de
Application granted granted Critical
Publication of EP0429130B1 publication Critical patent/EP0429130B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00—Investigation of foundation soil in situ
    • E02D1/02—Investigation of foundation soil in situ before construction work
    • E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil

Definitions

  • the invention relates to a drill point having an outer surface with a helical shape and a device for carrying out well drilling provided with such a drill point.
  • Such a drill point and device are known from FR-A-781.314, wherein the known drill point has a conical outer surface.
  • the drawback of the known device and drill point is that it requires a comparatively great deal of energy to force the known drill point into the ground by strokes of driving means, and that a great deal of noise, as much as 120 - 130 dB, is produced as a result of the large amount of energy required, which, even when ear mufflers are used, constitutes a high auditive load for the operators, and that furthermore a lot of undesirable vibrations are produced.
  • the object of the invention is to provide a drill point and a device whereby the drill point is effectively driven into the ground, and whereby less noise and fewer vibrations are produced.
  • the drill point according to the invention has features as recited in claim 1 and the device according to the invention has features as recited in claim 2.
  • the advantage is that as a result of the combination of the substantially continuous rotary motion, with a substantially constant angular velocity, and the specified helical profile of the outer surface of the drill point, said drill point is rotated into the ground, instead of being hammered, as a result of which considerably less noise and fewer vibrations are produced.
  • an equal amount of mechanical energy is communicated to the means for driving the drill point into the ground, it is surprisingly found that in comparable circumstances it is at the same time possible to drill substantially deeper than with conventional devices.
  • the means for driving the pipe into the ground is preferably a silent and commonly used hydraulic motor.
  • the pipe has two projections, and the drill point has two corresponding recesses.
  • Figure 1 shows the bottom end of a pipe 1, said pipe 1, together with the drill point 2 illustrated in the Figures 2, 3 and 4, and the means (not shown) for carrying out the rotary motion of the pipe 1 and the drill point 2, forming part of the device for carrying out well drilling.
  • the device comprises a hydraulic motor provided at the other end (not shown) of the pipe 1.
  • the pipe 1 is detachably coupled to the drill point 2, via projections 3 provided on the subterranean end of the pipe 1 and recesses 4, provided in the drill point 2, which correspond with said projections 3.
  • a cylindrical part 6, provided with O-rings 5, of the drill point 2 fits into the pipe 1, whereby the projections 3 and the corresponding recesses 4 engage one another.
  • the drill point 2 has a substantially conical outer surface 7.
  • the outer surface 7 is even exactly conical, when seen in elevational view.
  • said outer surface 7 appears to be more strongly contracted than can be derived from Figure 4.
  • This stronger contraction, when seen in the elevational view of Figure 2 results from the helical profile of the outer surface 7.
  • Figure 3 shows a bottom view of the helical extension, which is difficult to illustrate in a drawing, of the outer surface 7 of the drill point 2 illustrated in Figure 2.
  • the pitch of the helical outer surface 7 is to be determined such that, with a certain rotary velocity of the drill point 2 and with certain expected local soil conditions, the rotating drill point 2 is optimally adapted to the local soil structure and soil density.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Soil Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Paleontology (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
  • Drilling Tools (AREA)

Claims (4)

  1. Eine Bohrspitze (2) mit spiralenförmiger Außenfläche (7), dadurch gekennzeichnet, daß die Außenfläche (7) in einer ersten perspektivischen Seitenansicht (Fig. 4) eine exakte konische Gestalt aufweist und in einer zweiten seitlichen perspektivischen Ansicht (Fig. 2) eine weniger konische Gestalt hat, die spitz in Richtung der Spitze (8) zuläuft, wobei der Gang der sprialenförmigen Außenfläche (7) so gewählt ist, daß wenn die Bohrenspitze (2) über ihre axiale Länge verstellt wird, deren Verdrehung im Bereich von 10 - 40° gelegen ist.
  2. Ein Gerät zur Durchführung von bodenbohrungen, welches Gerät ein Rohr (1) mit zwei Enden umfaßt, eine Bohrspitze (2) nach Anspruch 1, wobei die Bohrspitze (2) lösbar an dem zweiten ende des Rohrs (1) befestigt ist, und ein rotierender Antrieb an das erste Ende gekoppelt ist, wobei der rotierende Antrieb einen hydraulischen Motor umfaßt, der in der Lage ist, die Bohrspitze (2) nahezu kontinuierlich drehen zu lassen.
  3. Ein Gerät nach Anspruch 2, wobei das zweite Ende des Rohrs (1) mit zwei Nocken (3) versehen ist und die Bohrspitze (2) zwei entsprechende Einschnitte (4) aufweist.
  4. Ein Gerät nach Anspruch 2 oder 3, wobei die Bohrspitze einen zylindrischen Teil (6) aufweist, der in das Rohr (1) paßt, wobei der zylindrische Teil (6) mit O-Ringen (5) versehen ist.
EP90203015A 1989-11-20 1990-11-14 Bohrspitze und Grundbohrvorrichtung. Expired - Lifetime EP0429130B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90203015T ATE101674T1 (de) 1989-11-20 1990-11-14 Bohrspitze und grundbohrvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902856 1989-11-20
NL8902856A NL8902856A (nl) 1989-11-20 1989-11-20 Inrichting voor het verrichten van grondboringen.

Publications (2)

Publication Number Publication Date
EP0429130A1 EP0429130A1 (de) 1991-05-29
EP0429130B1 true EP0429130B1 (de) 1994-02-16

Family

ID=19855652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90203015A Expired - Lifetime EP0429130B1 (de) 1989-11-20 1990-11-14 Bohrspitze und Grundbohrvorrichtung.

Country Status (4)

Country Link
EP (1) EP0429130B1 (de)
AT (1) ATE101674T1 (de)
DE (1) DE69006691T2 (de)
NL (1) NL8902856A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1004537C2 (nl) 1996-11-14 1998-05-18 Albert Hendrik Wissels Boorpunt voor grondboorinrichtingen.
DE102021107377A1 (de) 2021-03-24 2022-09-29 Matthes Felgentreff Verfahren zum herstellen einer trägerbohlwand und für das verfahren eingerichteter verbauträger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR781314A (fr) * 1934-11-16 1935-05-13 Sabot à vis applicable à des pieux de toute nature afin de permettre leur foncage par rotation
US3344871A (en) * 1965-02-17 1967-10-03 Jack P Goodman Earth boring machines and method of setting poles
GB1115796A (en) * 1965-04-06 1968-05-29 Bauer Karl Heinz Improvements in and relating to ground anchors and methods of making such anchors
FR1451807A (fr) * 1965-10-27 1966-01-07 Ts Kb G Geol Komiteta Ussr Foreuse portative pour le sondage rotatif

Also Published As

Publication number Publication date
DE69006691D1 (de) 1994-03-24
EP0429130A1 (de) 1991-05-29
DE69006691T2 (de) 1994-05-26
NL8902856A (nl) 1991-06-17
ATE101674T1 (de) 1994-03-15

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