EP1860274B1 - Pointe de forage - Google Patents

Pointe de forage Download PDF

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Publication number
EP1860274B1
EP1860274B1 EP06008686A EP06008686A EP1860274B1 EP 1860274 B1 EP1860274 B1 EP 1860274B1 EP 06008686 A EP06008686 A EP 06008686A EP 06008686 A EP06008686 A EP 06008686A EP 1860274 B1 EP1860274 B1 EP 1860274B1
Authority
EP
European Patent Office
Prior art keywords
plates
drilling
drill
base plate
auger bit
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
Application number
EP06008686A
Other languages
German (de)
English (en)
Other versions
EP1860274A1 (fr
Inventor
Erwin Stötzer
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.)
Bauer Maschinen GmbH
Original Assignee
Bauer Maschinen GmbH
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
Priority to AT06008686T priority Critical patent/ATE399926T1/de
Application filed by Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Priority to ES06008686T priority patent/ES2308627T3/es
Priority to PT06008686T priority patent/PT1860274E/pt
Priority to EP06008686A priority patent/EP1860274B1/fr
Priority to DE502006001030T priority patent/DE502006001030D1/de
Priority to JP2007112475A priority patent/JP4654215B2/ja
Priority to US11/790,373 priority patent/US7571781B2/en
Priority to CNA2007101011018A priority patent/CN101063402A/zh
Publication of EP1860274A1 publication Critical patent/EP1860274A1/fr
Application granted granted Critical
Publication of EP1860274B1 publication Critical patent/EP1860274B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits

Definitions

  • the invention relates to a drill bit for an auger according to the preamble of claim 1.
  • a drill bit is for example from the EP 1 580 397 A1 known. Drill bits are subject to considerable wear and must therefore be replaced frequently. In addition, there are drilling methods in which a drill tip is intended to remain in the ground. In such a drilling method with a so-called lost drill tip these are solved by reaching a desired drilling depth of a drill pipe, so that from the drill pipe can flow out a curable suspension for creating a drill column.
  • the DE 89 08 131 U1 describes various drill bits for a trained as Verdrängerbohrer Erdbohrer.
  • One from the DE 89 08 131 U1 known embodiment of a drill bit has a centrally located, massive Verdrängerspitze and two offset by 180 °, spiral Verdrängerrippen, which are applied to a flat end portion.
  • the US 2,973,821 discloses an auger having two half tube-shaped elements.
  • the half-tube-shaped elements combine to form a tube-like linkage element, at the lower end of which a drill bit is arranged.
  • the US 3,786,876 discloses an ice drill for use in fishing.
  • the ice drill has blade elements with spiral-like cutting surfaces.
  • the drill head has a circular edge element, on the outside of which drill teeth are provided. At the edge element three rib elements are provided at an angular distance of 120 °, which protrude from the circular edge element in the drilling direction.
  • the rib members have toothed, convex edges that converge in the direction of drilling.
  • the DE 1 263 652 A describes a drill head with a rotating drum on which two support bodies are arranged. On each support body in the direction of rotation curved back segment is attached, which represents a section of a screw surface. Chisels are arranged on the segments.
  • the invention has for its object to provide a drill tip that is particularly well meet the requirements for the most cost-effective drill bits with a continued good operability.
  • a drill bit according to the invention at least two curved plates are provided which extend radially outward from a drilling axis and whose axial height decreases radially outwardly.
  • the plates, which form cutting helix run like a turbine wheel from a center region on the drilling axis radially outward. This arcuate course with the tapering to the drilling axis allows a very good centering function of the drill bit.
  • the use of simple curved plates ensures a cost-effective construction.
  • the use of simple sheet metal parts allows a cost-effective welded construction, which is particularly advantageous in the disposable use as a lost drill bit.
  • the plates are provided with the same radius of curvature and are segments of a cylindrical tube, whereby a particularly inexpensive embodiment is obtained.
  • the curved plates can therefore be manufactured in a simple manner from inexpensive tubes.
  • the arcuate curvature need not be generated separately by bending, but results in a simple manner by the tube radius.
  • the plates have approximately quarter-arc segments with triangular or trapezoidal contour.
  • an edge of the plates may extend parallel to the cylinder or bending axis and be formed in a straight line.
  • the curved plates could adjoin one another directly in the region of the drilling axis of the drill bit to be formed and be welded together. According to the invention, however, it is provided that coaxially to the drilling axis, a central element is arranged, to which the plates adjoin.
  • the center element may be formed about a rod made of a steel or other hard material. This central element can serve to increase the rigidity as well as to accurately position and reliably secure the bent plates.
  • the central element can also have a tip, which projects axially relative to the curved plates.
  • a particularly good centering function is achieved according to the invention in that three or four plates are provided, which are arranged with a uniform angular distance from each other.
  • a pipe main body is preferably provided for attachment to a drill pipe.
  • This may be, for example, a short piece of pipe made of steel, which can be rotatably connected to the drill pipe.
  • a seal in particular in a designated annular groove, be provided for sealing against the drill pipe. The tube body can be inserted into the drill pipe or pushed over the drill pipe.
  • a base plate is provided, on which the plates are arranged.
  • the curved plates on a flat edge, with which they can be reliably welded to a flat base plate.
  • the base plate is attached to the fixed bent plates on the pipe body, in particular by welding.
  • a form-fitting device for a releasable connection with a drill string can be recesses or protruding bolts or edges which can engage and cooperate with the drill string to form a bayonet closure in correspondingly designed positive-locking elements on the drill string.
  • a good centering function is achieved according to the invention in that the axes of curvature of the curved plates are arranged parallel or inclined to the drilling axis. In the inclined arrangement, the axes of curvature of the curved plates are tilted towards the drilling axis.
  • a drill bit of the type described above is arranged on the drill pipe.
  • a drilling tool can be created in particular in a reliable and cost-effective manner, a concrete element in the ground with a lost drill bit.
  • the embodiment of a drill bit 10 according to the invention according to the FIGS. 1 to 4 includes a tube body 18, which is closed at one end with a base plate 20.
  • a cylindrical center element 16 is arranged coaxially to the central axis or drilling axis 14, which is flattened at its free end.
  • two curved plates 12 are arranged on the base plate 20 and on the middle element 16.
  • the two curved plates 12 have a trapezoidal contour, as in particular from Fig. 3 can be seen.
  • the bent plates 12 are cut as a quarter-circle-shaped segments from a tube. This allows a particularly cost-effective and stable design of the plates 12th
  • the plates 12 have an axial height which corresponds to the length of the central element 16.
  • the Height of the plates decreases radially outward, so that a desired tip shape is generated.
  • the edge of the plates 12 forming a cutting edge extends approximately partially helically, which is favorable for the centering and tip function. This advantageous course results in a simple manner by a straight, but guided at a helix angle section in a tube from which the plates 12 are made.
  • the outer diameter of the round base plate 20 is greater than the outer diameter of the hollow cylindrical tube body 18.
  • recesses are used for releasably connecting the drill bit 10 to a drill string, not shown, in particular a hollow drill pipe.
  • FIGS. 5 to 7 Another embodiment of a drill bit 10 according to the invention is in the FIGS. 5 to 7 shown.
  • the tube body 18 and the base plate 20 with the recesses as form-fitting devices 22 are formed as in the previous embodiment.
  • the drill bit 10 is an inclined arrangement of the axes of curvature of the curved plates 12 to the drilling axis 14 given.
  • the central element 16 is formed as a trapezoidal or in cross-section approximately triangular body, which tapers from the base plate 20 to the free tip.
  • the actual free tip is formed in this drill bit 10 by the upper edges of the curved plates 12.
  • these are bevelled on their underside or they are, as in Fig. 5 shown, recesses provided in the base plate 20.

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)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Holo Graphy (AREA)
  • Surgical Instruments (AREA)

Claims (7)

  1. Pointe de forage pour une tarière, avec
    une plaque de base (20),
    au moins deux plaques cintrées (12) qui sont fixées sur la plaque de base (20), qui s'étendent radialement vers l'extérieur depuis un axe de forage (14) et dont la hauteur axiale diminue radialement vers l'extérieur, et
    un élément central (16) qui est placé coaxial à l'axe de forage (14) sur la plaque de base (20),
    caractérisée en ce que les plaques (12) sont des segments d'un tube cylindrique et présentent le même rayon de courbure, et
    en ce que les plaques (12) sont contiguës à l'élément central (16) et l'élément central (16) sert à la fixation des plaques cintrées (12).
  2. Pointe de forage selon la revendication 1, caractérisée en ce que les plaques (12) présentent des segments approximativement en forme de quarts de cercle, avec un contour triangulaire ou trapézoïdal.
  3. Pointe de forage selon l'une quelconque des revendications 1 ou 2, caractérisée en ce qu'il est prévu trois ou quatre plaques (12), qui sont disposées avec une distance angulaire constante les unes par rapport aux autres.
  4. Pointe de forage selon l'une quelconque des revendications 1 à 3, caractérisée en ce que les axes de courbure des plaques cintrées (12) sont parallèles ou inclinées par rapport à l'axe de forage (14).
  5. Pointe de forage selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'un corps de base tubulaire (18) est prévu pour le montage sur une tige de forage.
  6. Pointe de forage selon l'une quelconque des revendications 1 à 5, caractérisée en ce que sur le corps de base tubulaire (18) ou la plaque de base (20) est prévu un dispositif d'engagement positif (22) pour une liaison amovible avec une tige de forage.
  7. Outil de forage avec une tige de forage, en particulier un tube de forage, caractérisé en ce qu'une pointe de forage (10) selon l'une quelconque des revendications 1 à 6 est placée sur la tige de forage.
EP06008686A 2006-04-26 2006-04-26 Pointe de forage Not-in-force EP1860274B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ES06008686T ES2308627T3 (es) 2006-04-26 2006-04-26 Punta de perforacion.
PT06008686T PT1860274E (pt) 2006-04-26 2006-04-26 Cabeça de perfuração
EP06008686A EP1860274B1 (fr) 2006-04-26 2006-04-26 Pointe de forage
DE502006001030T DE502006001030D1 (de) 2006-04-26 2006-04-26 Bohrspitze
AT06008686T ATE399926T1 (de) 2006-04-26 2006-04-26 Bohrspitze
JP2007112475A JP4654215B2 (ja) 2006-04-26 2007-04-23 オーガビット
US11/790,373 US7571781B2 (en) 2006-04-26 2007-04-25 Auger bit
CNA2007101011018A CN101063402A (zh) 2006-04-26 2007-04-26 螺旋钻头

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06008686A EP1860274B1 (fr) 2006-04-26 2006-04-26 Pointe de forage

Publications (2)

Publication Number Publication Date
EP1860274A1 EP1860274A1 (fr) 2007-11-28
EP1860274B1 true EP1860274B1 (fr) 2008-07-02

Family

ID=37055759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06008686A Not-in-force EP1860274B1 (fr) 2006-04-26 2006-04-26 Pointe de forage

Country Status (8)

Country Link
US (1) US7571781B2 (fr)
EP (1) EP1860274B1 (fr)
JP (1) JP4654215B2 (fr)
CN (1) CN101063402A (fr)
AT (1) ATE399926T1 (fr)
DE (1) DE502006001030D1 (fr)
ES (1) ES2308627T3 (fr)
PT (1) PT1860274E (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2146046B1 (fr) 2008-07-15 2014-04-09 Marti Gründungstechnik AG Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant
US9416513B2 (en) * 2013-10-25 2016-08-16 Hubbell Incorporated Helical screw pile and soil displacement device with curved blades
US20160090792A1 (en) * 2014-09-29 2016-03-31 Bhupinder Grewal Auger Blade
USD768742S1 (en) * 2014-10-26 2016-10-11 Guy Charbonneau Deicing blade
US10458090B2 (en) 2016-02-03 2019-10-29 Hubbell Power Systems, Inc. Soil displacement piles
PL3216974T3 (pl) * 2016-03-10 2019-05-31 Marti Gruendungstechnik Ag Głowica wiertnicza do urządzenia wiertniczego do wykonywania otworów wiertniczych w niewystarczająco nośnym gruncie budowlanym
WO2018165617A1 (fr) 2017-03-10 2018-09-13 Hubbell Incorporated Pieu doté d'un ensemble de déplacement de sol
US10337253B2 (en) 2017-06-22 2019-07-02 Marti Gründungstechnik Ag Drill head for a drilling device for creating drill holes in insufficiently stable foundation

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US569121A (en) * 1896-10-06 Foe pro
US1776018A (en) * 1927-11-14 1930-09-16 Harry C Brown Underreaming well-drilling bit
US2190434A (en) * 1937-09-20 1940-02-13 Felix L Pivoto Changeable blade drag bit
US2285024A (en) * 1939-08-11 1942-06-02 John B Ferguson Sample taking apparatus
US2973821A (en) * 1958-02-06 1961-03-07 Stihl Andreas Rotatable earth borer
DE1263652C2 (de) * 1966-08-27 1973-09-20 Hibernia Ag Bohrverfahren und Bohrkopf zur Herstellung von Bohrungen, insbesondere grossen Durchmessers, in Mineralien, bevorzugt Kohle
US3786876A (en) * 1971-06-24 1974-01-22 A Aaltonen Ice auger
US3763942A (en) * 1972-02-25 1973-10-09 Contracting & Material Co Auger head
US4252481A (en) * 1979-06-21 1981-02-24 Widder Corporation Cutting tool
DE3544433C2 (de) * 1985-12-16 1995-12-14 Hilti Ag Gesteinsbohrer
DE8908131U1 (fr) * 1989-07-04 1990-10-31 Delmag Maschinenfabrik Reinhold Dornfeld Gmbh & Co, 7300 Esslingen, De
JPH0810517Y2 (ja) * 1989-10-25 1996-03-29 新日本製鐵株式会社 穿孔ビット
US5810517A (en) * 1993-06-28 1998-09-22 Monroe Cutting Tool Inc. Rotary milling cutters
DE19702137A1 (de) * 1997-01-22 1998-07-23 Fundex N V Erdverdrängungsbohrer
IT1291804B1 (it) * 1997-03-17 1999-01-21 Miro Cesare Mati Attrezzatura per la lavorazione di un terreno senza escavazioni demolitive
US6655476B2 (en) * 2001-02-23 2003-12-02 Timothy R. Wall Earth boring bit
JP2004003125A (ja) * 2002-03-28 2004-01-08 Hiromi Kuwahata 先端ビット回転埋設工法及び装置
DE502004003756D1 (de) 2004-03-26 2007-06-21 Bauer Maschinen Gmbh Bohrspitze

Also Published As

Publication number Publication date
PT1860274E (pt) 2008-07-31
EP1860274A1 (fr) 2007-11-28
ATE399926T1 (de) 2008-07-15
ES2308627T3 (es) 2008-12-01
US7571781B2 (en) 2009-08-11
DE502006001030D1 (de) 2008-08-14
US20080035385A1 (en) 2008-02-14
CN101063402A (zh) 2007-10-31
JP2007291847A (ja) 2007-11-08
JP4654215B2 (ja) 2011-03-16

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