EP0352215A2 - Outil de forage - Google Patents

Outil de forage Download PDF

Info

Publication number
EP0352215A2
EP0352215A2 EP89710056A EP89710056A EP0352215A2 EP 0352215 A2 EP0352215 A2 EP 0352215A2 EP 89710056 A EP89710056 A EP 89710056A EP 89710056 A EP89710056 A EP 89710056A EP 0352215 A2 EP0352215 A2 EP 0352215A2
Authority
EP
European Patent Office
Prior art keywords
drilling tool
helix
tool according
conveyor
spiral
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.)
Granted
Application number
EP89710056A
Other languages
German (de)
English (en)
Other versions
EP0352215A3 (en
EP0352215B1 (fr
Inventor
August Haussmann
Wolfgang Dipl.-Ing. Peetz
Bernhard Moser
Bernd Wessbecher
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.)
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Robert Bosch Power Tools GmbH
Original Assignee
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Hawera Probst 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
Application filed by Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG, Hawera Probst GmbH filed Critical Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Publication of EP0352215A2 publication Critical patent/EP0352215A2/fr
Publication of EP0352215A3 publication Critical patent/EP0352215A3/de
Application granted granted Critical
Publication of EP0352215B1 publication Critical patent/EP0352215B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • 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
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/02—Scrapers specially adapted therefor

Definitions

  • the outside diameter of the spiral shank of a conventional rock drill is always below the nominal diameter of the drilling tool, which is formed by the outside diameter of the hard metal cutting edge. As a result, the spiral shaft cannot completely ensure that the drilling dust is properly scraped off the inner wall of the borehole.
  • a drilling tool which has become known which has a slide-on conveying helix which consists of a helically formed wire part made of rubber, synthetic rubber, pressed material or the like, the outer edge of the conveying helix being narrow and flexible, so that a certain brush effect and thus cleaning of the borehole is to be achieved through these areas.
  • a disadvantage of this known drilling tool is the structure of these allegedly brushing elements, which is to be formed by merely reducing the wall thickness of an otherwise conventional conveying spiral. In practice, this should lead to a rapid wear of these areas, since these are not actual brush-like organs, but rather means that at most exert a certain scraping effect.
  • the invention is based on the object of proposing a drilling tool, in particular a rock drill, which ensures problem-free discharge of the drilling dust from the borehole during the manufacturing process.
  • the invention is based on the knowledge that only one Wholesome brush element made of bristles can bring about a satisfactory and absolutely safe cleaning of a borehole, ie the arrangement according to the prior art is not very suitable for reliable removal of the drilling dust, in particular under difficult conditions.
  • the invention provides full-fledged brush elements with a large number of individual bristles, which process every area of the borehole with a large effective brushing surface. This ensures an absolutely safe removal of the drilling dust from the borehole.
  • the invention further provides that, in addition to the function of cleaning the inner wall of the borehole, the brush elements also serve as a conveyor helix due to a corresponding helical arrangement of these brush elements.
  • Either individual bristle bundles or elongated strip brushes are used as brush elements, as are known per se from other fields of application.
  • the basic idea according to the invention is realized particularly advantageously on a one-piece drilling tool or on a drilling tool provided with a plug-on helix.
  • the brush elements can either be applied directly in the existing grooves of a conventional drilling tool or on a cylindrical shaft. In the latter case, the brush elements alone form the spiral gear. The same applies if you make this arrangement on an attachable conveyor spiral.
  • the brush elements in bores, in grooves or on the
  • the cylindrical shank is glued in or glued on or, if necessary, fastened in a form-fitting manner by means of a snap connection.
  • the brush elements can also be soldered or soldered in or screwed in with a cylindrical brush foot.
  • the brush elements can be designed as replaceable elements.
  • the bristle or brush elements can also be fixed by means of material flanging.
  • the bristle bundles are arranged in the groove base of the spiral shaft in such a way that they overlap in the axial direction or that they are also arranged spirally in the groove base.
  • the axial overlap ensures that every inner casing area of the borehole is covered.
  • strip brushes are arranged on a flexible carrier tape made of plastic or metal, this tape in turn being able to be wound spirally in grooves or on a helical conveyor shaft. It is advantageous if the carrier tape is completely embedded in a groove so that the brushes cannot be sheared off.
  • strip brushes are arranged asymmetrically in the grooves in such a way that an additional drilling dust space results from the groove.
  • the brushes are welded onto the plastic carrier tape or directly onto a tubular slip-on helix, the individual brushes penetrating approximately 5/10 mm into the base material.
  • strip brushes it is also advantageous if these are arranged spirally in segment sections, wherein metal webs can preferably be provided as supporting conveyor spiral sections between the segment sections.
  • a conveying helix in a preferred embodiment of the invention, can be formed in a conventional manner with a metal web or, in the case of an attachable helix, also with a plastic web and the second conveying helix can be formed by brush elements.
  • the spiral shaft or the conveying helix can be made of a twisted or twisted base material, the base material having axial longitudinal grooves or axially arranged bores for receiving the brush elements, which form a spiral after the twist.
  • the brush elements are only arranged in the upper third of the spiral shaft, since this can be sufficient for cleaning the borehole. In principle, however, it is possible to equip the spiral shaft with brush elements.
  • the brush elements themselves are designed as conveyor coils or conveyor coil sections, the task of conveying the drilling dust is performed by the brush elements themselves and, if appropriate, by the additional grooves for the strip brushes.
  • the individual bristle bundles or the strip-shaped strip brushes are suitable.
  • the rock drill 1 shown in FIG. 1 consists of a drill head 2, a clamping shaft 3 and a spiral shaft or a conveying helix 4 located in between.
  • a drill head 2 a clamping shaft 3 and a spiral shaft or a conveying helix 4 located in between.
  • the embodiment according to FIG serve to clean the borehole of drilling dust.
  • the Individual bundles of bristles are attached in the groove base of the spiral shaft in such a way that they do not or only insignificantly impair the conveying of drilling dust from the helix.
  • the individual bristle bundles are introduced into bores 7 in the groove base 5 of the spiral shaft 4, the upper bristle bundle 6 in Fig. 3 glued into the bore 7 and the lower bristle bundle 6 'by means of a snap connection 8 in the bore 7th is introduced.
  • a threaded connection can also be provided.
  • the bristle bundle 6 consists of a one-piece, brush-like round or conical bristle element made of a plastic or metal with an optionally molded foot as a fastening element, such as. B. screw head or snap connection 8 or soldering or adhesive sleeve 12.
  • a fastening element such as. B. screw head or snap connection 8 or soldering or adhesive sleeve 12.
  • Such elements are shown, for example, in the brochure of Pedex & Co. GmbH in 6948 Wald-Michelbach.
  • the bristle bundles 6 can be arranged off-center in the drilling dust groove or the groove base 5 of a conventional drilling tool.
  • the distance a pointing towards the drill head in the groove base is made larger than the remaining distance b, since this area serves to hold the drilling dust.
  • the individual bristle bundles 6 are arranged spirally on a smooth cylindrical conveyor helix shaft 9, so that they are arranged in the manner of a separate conveyor helix 10 with the pitch angle ⁇ .
  • the outer effective The diameter (d) of the conveying helix 10 formed by the bristle bundles 6 is the same size or slightly larger than the nominal diameter (D) of the drilling tool, the nominal diameter being formed by the hard metal cutting element 11 on the drill head 2. This ensures that the inner wall of the borehole is always reached by the brushes of the individual bristle bundles. This also applies to the exemplary embodiment according to FIG. 1.
  • the bristle bundles 6 are introduced into bores in the wall 14 of a hollow helix 15 which is hollow in the inner region in the upper region of the illustration (see arrow 13).
  • the bristle bundles 6 are in turn arranged spirally to form a conveyor helix 10 with the pitch angle ⁇ .
  • This plug-on helix 15 can then be pushed onto a cylindrical drill shaft in a conventional manner.
  • strip brushes of this type have an elongated, U-shaped edging foot (carrier band), in which the bristles made of special trim materials made of plastic or metal or the like are embedded. They can easily be bent into any shape, in particular also spirally, so that they are also suitable for the present application.
  • the bristles of the bristle bundle 6 or the strip brush 17 can also be welded onto the carrier tape, these being embedded in the base material in a bead-like manner about 5/10 mm.
  • continuous grooves 18 are made in the wall 14 of the plug-on helix 15 (FIG. 4), as is also shown in the exemplary embodiment according to FIG. 5 for a solid material for a drill spiral shaft 9.
  • the strip brushes thus form a separate conveyor helix 19, similar to the conveyor helix 10 in FIG. 2, formed from the individual bristle bundles 6. This conveyor helix then also has the task of transporting the drilling dust out of the borehole and cleaning the borehole wall of drilling dust.
  • the strip brush 17 can also be designed as individual, interrupted segments, the space 20 between the segments 17 ', 17' not being filled at all or filled by means of a metal or plastic web 21 indicated by dashed lines can be.
  • the web 21 has the shape of a conveyor helix and supports the guidance of the conveyor helix.
  • the cylindrical drill shaft is also provided with grooves 18 for receiving the strip brushes 17, possibly with additional gaps 20 'or webs 21'.
  • the outer diameter (d) of the strip brushes 17 is, as in the examples described above, of the same size or slightly larger than the nominal diameter (D) of the drilling tool.
  • the strip brush 17 shown in FIGS. 4 and 5 can also be applied, in particular glued, directly to a cylindrical conveyor spiral section without an additional groove 18.
  • the foot or the strap is the Strip brush 17 provided with an adhesive tape or an adhesive film, which enables a firm connection between the strip brush 17 and the cylindrical base material.
  • the foot or the carrier tape can optionally also consist of metal and thereby be soldered onto the helical shaft.
  • This type of application enables the strip brush to be arranged in any desired manner, and such a strip brush conveying helix can also be fitted to a drilling tool which has a clamping shank or drill head which is wider in diameter than the conveying helix shaft, so that an additional tubular conveying helix is pushed on is no longer possible.
  • FIGS. 6a to c show a horizontal section through the spiral shaft according to FIG. 3 or 5 with different types of fastening of the bristle bundles or the strip brushes. It must be ensured here that the individual bristles are firmly clamped to the conveyor helix shaft or are otherwise fastened. 6a to c, undercuts 22 are provided for this purpose, which enable the rear part of the bristles to be spread open and thus to strengthen the connection. Furthermore, edging 23 or other form-fitting connections can be provided.
  • the initially axially extending longitudinal grooves for receiving the strip brushes can also be produced with an undercut 22 as shown in FIG. 6 and the receiving base of the strip brushes can be shaped accordingly.
  • the strip brush can then be inserted into this guide groove in an axial feed movement before or after the drill shaft is twisted.
  • the conveyor helix 10 formed from the bristle bundles 6 or the conveyor helix 19 formed from the strip brushes 17 can form one of the two conveyor helices, while the second conveyor helix is retained as a conventional metal web.
  • the strip brush 17 has a carrier tape 24 made of plastic or metal, in which the bristles 25 are anchored.
  • deep puncture grooves 18 are provided, into which the carrier tape 24 is completely sunk.
  • the depth t of the sinking of the carrier tape 24 into the groove 18 should be approximately two times b (t ⁇ 2 x b), where b is the width of the bristles 25. This ensures that the flexibility of the bristles 25 in the groove 18 is always guaranteed, d. H. by embedding in the groove or in the pocket 18, shearing of the bristles 25 at the edge of the borehole is avoided by tilting the machine.
  • it is expedient that the corner edges 26 of the grooves 18 are rounded.
  • the bristles 25 can be arranged asymmetrically in the groove 18, ie the upper region x 1 is larger than the lower region x 2, whereby an additional drilling dust chamber 27 is created above the bristles 25. This arrangement can also be transferred to FIG. 7.
  • FIG. 8 shows a strip brush 17 in the upper area corresponding to the description in FIG. 7, but without carrier tape 24.
  • an arrangement of bristle bundles 28 in a groove 18 is shown.
  • these bundles of bristles can also be welded onto a carrier tape 24 ', similar to the carrier tape 24 according to FIG. 7, and thus form a roll brush strip with individual bristle bundles 6.
  • both a strip brush 17 and a bristle bundle strip 28 are applied to a conveyor spiral in corresponding grooves 18 or directly on the conveyor spiral shaft without grooves, the arrangement being able to be carried out one behind the other in the axial direction or - in the case of a two-start spiral - one spiral path consists of a strip brush 17 and the other spiral path consists of a strip-shaped bristle bundle 28.
  • the invention is not restricted to the exemplary embodiment shown and described. Rather, it also encompasses all professional training courses without their own inventive content.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Brushes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP89710056A 1988-07-16 1989-06-10 Outil de forage Expired - Lifetime EP0352215B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3824170 1988-07-16
DE3824170 1988-07-16

Publications (3)

Publication Number Publication Date
EP0352215A2 true EP0352215A2 (fr) 1990-01-24
EP0352215A3 EP0352215A3 (en) 1990-12-05
EP0352215B1 EP0352215B1 (fr) 1994-03-30

Family

ID=6358830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89710056A Expired - Lifetime EP0352215B1 (fr) 1988-07-16 1989-06-10 Outil de forage

Country Status (2)

Country Link
EP (1) EP0352215B1 (fr)
DE (1) DE58907334D1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001066902A1 (fr) * 2000-03-10 2001-09-13 American Tool Companies A/S Foret
EP1138871A1 (fr) * 2000-03-27 2001-10-04 HILTI Aktiengesellschaft Foret hélicoidal
CN102330544A (zh) * 2011-10-13 2012-01-25 中国石油集团西部钻探工程有限公司 螺旋式套管刮削器
US10532412B2 (en) 2016-09-23 2020-01-14 Milwaukee Electric Tool Corporation Hole saw arbor assembly
US10730119B2 (en) 2017-01-06 2020-08-04 Milwaukee Electric Tool Corporation Hole saw
CN112832773A (zh) * 2020-12-30 2021-05-25 重庆交通大学 一种用于隧道撑子面爆破开挖的变形钻头
USD965653S1 (en) 2017-08-15 2022-10-04 Milwaukee Electric Tool Corporation Hole saw
CN116277446A (zh) * 2022-11-15 2023-06-23 长兴奥宇塑业有限公司 蒸压加气混凝土板网笼的连接组件、组网结构和使用方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1380517A (en) * 1920-06-28 1921-06-07 Samuel F Bashara Well-screen cleaner
US2693611A (en) * 1953-03-25 1954-11-09 William A Lombardi Flexible rotary cylindrical brush
GB836034A (en) * 1956-09-19 1960-06-01 Albico Prec Engineering Ltd An improved masonry or like drill bit
US3824646A (en) * 1972-11-17 1974-07-23 M Jai Combination drilling and brushing tool in a pipe cleaning machine
NL7401084A (fr) * 1973-01-27 1974-07-30

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001066902A1 (fr) * 2000-03-10 2001-09-13 American Tool Companies A/S Foret
US6959775B2 (en) * 2000-03-10 2005-11-01 Irwin Industrial Tool Company Drill bit
CN1309928C (zh) * 2000-03-10 2007-04-11 欧文工业用具有限公司 钻头
EP1496192A3 (fr) * 2000-03-10 2009-06-24 Irwin Industrial Tool Company A/S Trépan de forage
EP1138871A1 (fr) * 2000-03-27 2001-10-04 HILTI Aktiengesellschaft Foret hélicoidal
US6571890B2 (en) 2000-03-27 2003-06-03 Hilti Aktiengesellschaft Twist drill
CN102330544A (zh) * 2011-10-13 2012-01-25 中国石油集团西部钻探工程有限公司 螺旋式套管刮削器
US11154940B2 (en) 2016-09-23 2021-10-26 Milwaukee Electric Tool Corporation Hole saw arbor assembly
US10532412B2 (en) 2016-09-23 2020-01-14 Milwaukee Electric Tool Corporation Hole saw arbor assembly
US12447538B2 (en) 2016-09-23 2025-10-21 Milwaukee Electric Tool Corporation Hole saw arbor assembly
US10730119B2 (en) 2017-01-06 2020-08-04 Milwaukee Electric Tool Corporation Hole saw
US11559840B2 (en) 2017-01-06 2023-01-24 Milwaukee Electric Tool Corporation Hole saw
US12233467B2 (en) 2017-01-06 2025-02-25 Milwaukee Electric Tool Corporation Hole saw
US12403538B2 (en) 2017-01-06 2025-09-02 Milwaukee Electric Tool Corporation Hole saw
US12403537B2 (en) 2017-01-06 2025-09-02 Milwaukee Electric Tool Corporation Hole saw
USD965653S1 (en) 2017-08-15 2022-10-04 Milwaukee Electric Tool Corporation Hole saw
USD973733S1 (en) 2017-08-15 2022-12-27 Milwaukee Electric Tool Corporation Hole saw
CN112832773A (zh) * 2020-12-30 2021-05-25 重庆交通大学 一种用于隧道撑子面爆破开挖的变形钻头
CN116277446A (zh) * 2022-11-15 2023-06-23 长兴奥宇塑业有限公司 蒸压加气混凝土板网笼的连接组件、组网结构和使用方法
CN116277446B (zh) * 2022-11-15 2024-04-26 长兴奥宇塑业有限公司 蒸压加气混凝土板网笼的连接组件、组网结构和使用方法

Also Published As

Publication number Publication date
EP0352215A3 (en) 1990-12-05
DE58907334D1 (de) 1994-05-05
EP0352215B1 (fr) 1994-03-30

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