EP0189024A1 - Trépan - Google Patents

Trépan Download PDF

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Publication number
EP0189024A1
EP0189024A1 EP85890311A EP85890311A EP0189024A1 EP 0189024 A1 EP0189024 A1 EP 0189024A1 EP 85890311 A EP85890311 A EP 85890311A EP 85890311 A EP85890311 A EP 85890311A EP 0189024 A1 EP0189024 A1 EP 0189024A1
Authority
EP
European Patent Office
Prior art keywords
drill bit
nozzles
bit according
nozzle
cutting insert
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.)
Ceased
Application number
EP85890311A
Other languages
German (de)
English (en)
Inventor
Kurt Dipl.-Ing. Hölzl
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.)
Vereinigte Edelstahlwerke AG
Original Assignee
Vereinigte Edelstahlwerke AG
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 Vereinigte Edelstahlwerke AG filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0189024A1 publication Critical patent/EP0189024A1/fr
Ceased legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58Chisel-type inserts
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56Button-type inserts
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/60Drill bits characterised by conduits or nozzles for drilling fluids

Definitions

  • the invention relates to a drill bit for liquid-assisted, in particular rotating drilling in rock, coal or the like.
  • Liquid jet, especially water jet assisted drilling in rock is generally a purely rotating drilling, although hammer drilling is also conceivable in certain cases.
  • the water jet hits the rock at a pressure of between 1200 and 2400 bar, the rock, coal or other material to be drilled first being loosened by a cutting insert, for example made of hard metal. This loosening creates the finest hairline cracks, into which the liquid jets enter, so that the rock is additionally removed by the water jet, which goes beyond the rinsing and discharge of the small, which has been known for ages.
  • the present invention has set itself the goal of creating a drill bit in which the liquid jet is used much more efficiently than before, whereby less wear on the drill bits, in particular the cutting inserts, is to be ensured with the same drilling step, while at the same time also ensuring a faster drilling step can be.
  • the nozzle for the liquid jet is arranged in relation to the direction of rotation between the flushing channel and the cutting edge, the liquid jet is used in the rock before the cutting edge, so that the finest e.g. microcracks corresponding to the texture of the rock are generated, after which these rock fragments are mechanically extracted or broken out by the subsequent cutting edge, so that, in contrast to the arrangement known to date, the drilling energy is used less for crushing the rock than for breaking out rocks from the borehole .
  • the nozzles have different radial distance according to a further feature of the invention, it is possible for example in the nature tl cozy appropriate inclination of the nozzles of the bottom of the Borehole are evenly impacted by the liquid jets.
  • a particularly good guidance of the drill bit results when the nozzle closest to the axis of the drill bit is arranged with its outlet channel parallel to the axis or inclined inwards, since in this case a cylinder or a cone inclined to the axis is cut out of the rock, as a result of which the high guidance of the drill bit is given.
  • a particularly effective diameter of the outlet channel for the nozzle is given if it is between 0.3 and 0.6 mm.
  • a particularly simple embodiment of the drill bit which at the same time allows a high variation in the inclination of the liquid jet, is provided if the nozzles are arranged in essentially cylindrical recesses which open on the surface of the base body and each have a seat for one nozzle , and optionally held in this via a threaded bush.
  • two hard metal cutting inserts which extend to or over the outer circumference of the base body of the drill bit, and preferably have a greater thickness in the area close to the axis than in the area close to the axis, then a design which takes account of the stresses in particular is selected which has a correspondingly high level Has lifespan.
  • pin-shaped cutting inserts preferably with a wedge shape in the cutting direction with different radial spacing and nozzles with different radial spacing, wherein nozzles and cutting inserts preferably have different radial spacings, a particularly favorable arrangement of both the cutting arrangement and the nozzles is ensured, with a real synergistic effect between cutting inserts and nozzles can be reached.
  • a particularly advantageous embodiment of the flushing channels is achieved by cheek-shaped recesses in the base body of the drill bit tapering to the drill pipe.
  • a particularly low pressure drop in the liquid is achieved in that a central liquid supply is provided in the drill bit, which ends in feed lines to the individual nozzles.
  • FIG. 1, 2 and 3 show a drill bit in a view from above and in a side view
  • FIG. 4 shows the attachment of a nozzle in the base body of the drill bit.
  • the base body 1 shown in FIG. 1 has a diameter that widens towards the base of the drill.
  • the rinsing channels 6, 7 partially adjoin the cutting inserts, but are essentially provided in front of the nozzles arranged in front of the cutting inserts.
  • a nozzle 8 close to the axis is provided, which cuts a cone out of the rock, the tip of which is arranged in front of the drill bit in the drilling direction.
  • the outlet of the nozzles opens below the contour of the base body and in all other drill bits shown in the following figures.
  • the cutting inserts 2, 3 have a greater thickness in their region 2a, 3a close to the circumference than in their region 2b, 3b close to the axis.
  • the cutting insert 2 extends beyond the axis 9 of the drill bit.
  • a central liquid supply 10 is provided, which opens into individual feed lines 11 (only one shown) to the individual nozzles, for example 12.
  • the drill bit shown in FIG. 2 essentially corresponds to the drill bit according to FIG. 1, the two cutting inserts 13, 14, which are designed in accordance with the cutting inserts according to FIG. 1, both extending over the axis 9 of the drill bit. Furthermore, the nozzles 15, 16, 17, 18 and 19 are partially arranged differently than in FIG. 1, the radial distance being particularly clearly evident.
  • pin-shaped cutting inserts 21 are provided which have different radial spacings and have a wedge-shaped shape in the direction of rotation a.
  • the rinsing channels 22, 23, 24 and 25 are formed by lateral cheek-shaped recesses in the base body.
  • the nozzles 26, 27, 28 and 29 have different distance from the axis 9 of the drill bit, which distances are simultaneously different from the radial distances of the pin-shaped cutting inserts, and the channels have a different inclination to the drilling axis.
  • a thread is provided in the cylindrical recess into which a threaded sleeve 32 can be screwed, which has a receiving body 33 for the Nozzle block 34 forms.
  • the inside diameter of the outlet channel 35 is between 0.3 and 0.6 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP85890311A 1984-12-18 1985-12-13 Trépan Ceased EP0189024A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4011/84 1984-12-18
AT0401184A AT381769B (de) 1984-12-18 1984-12-18 Bohrkrone

Publications (1)

Publication Number Publication Date
EP0189024A1 true EP0189024A1 (fr) 1986-07-30

Family

ID=3558439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890311A Ceased EP0189024A1 (fr) 1984-12-18 1985-12-13 Trépan

Country Status (2)

Country Link
EP (1) EP0189024A1 (fr)
AT (1) AT381769B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001432A1 (fr) * 1989-07-21 1991-02-07 Australian Stone Technology Procede et appareil servant a tailler des materiaux erodables en utilisant des moyens d'eau a haute pression
EP0990766A3 (fr) * 1998-09-30 2000-10-04 Philipp Holzmann AG Pointe de forage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420643A1 (fr) * 1978-03-25 1979-10-19 Bochumer Eisen Heintzmann Procede et outil pour le decoupage de mineraux par arrachage mecanique et projection de jets d'eau
EP0017518A1 (fr) * 1979-03-08 1980-10-15 Construction De Materiels De Mines Foreuse rotative et procédé de foration à l'aide de cette foreuse
EP0114016A1 (fr) * 1982-12-23 1984-07-25 Etablissement public dit: CHARBONNAGES DE FRANCE Taillant pour foration rotative assistée par jet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420643A1 (fr) * 1978-03-25 1979-10-19 Bochumer Eisen Heintzmann Procede et outil pour le decoupage de mineraux par arrachage mecanique et projection de jets d'eau
EP0017518A1 (fr) * 1979-03-08 1980-10-15 Construction De Materiels De Mines Foreuse rotative et procédé de foration à l'aide de cette foreuse
EP0114016A1 (fr) * 1982-12-23 1984-07-25 Etablissement public dit: CHARBONNAGES DE FRANCE Taillant pour foration rotative assistée par jet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
INDUSTRIE MINERALE, vol. 64, no. 7, Juli 1982, Seiten 419-428, Paris, FR; M. HAMEL "Le jet d'eau à haute pression : un nouvel outil pour le mineur et le carrier" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001432A1 (fr) * 1989-07-21 1991-02-07 Australian Stone Technology Procede et appareil servant a tailler des materiaux erodables en utilisant des moyens d'eau a haute pression
US5332293A (en) * 1989-07-21 1994-07-26 Australian Stone Technology Pty. Ltd. Apparatus for cutting erosive materials using high pressure water device
EP0990766A3 (fr) * 1998-09-30 2000-10-04 Philipp Holzmann AG Pointe de forage

Also Published As

Publication number Publication date
ATA401184A (de) 1986-04-15
AT381769B (de) 1986-11-25

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): DE FR GB SE

17P Request for examination filed

Effective date: 19861205

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18R Application refused

Effective date: 19890128

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOELZL, KURT, DIPL.-ING.