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EP4239159A1 - Canal central de rinçage comprenant un marqueur d'identification - Google Patents

Canal central de rinçage comprenant un marqueur d'identification Download PDF

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Publication number
EP4239159A1
EP4239159A1 EP22160150.3A EP22160150A EP4239159A1 EP 4239159 A1 EP4239159 A1 EP 4239159A1 EP 22160150 A EP22160150 A EP 22160150A EP 4239159 A1 EP4239159 A1 EP 4239159A1
Authority
EP
European Patent Office
Prior art keywords
bit
drill bit
rock drill
identification marker
flushing channel
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.)
Withdrawn
Application number
EP22160150.3A
Other languages
German (de)
English (en)
Inventor
Susanne Norgren
John Hammargren
Micael BAUDIN
Jan Gravningsbråten
Benneth LEANDERS
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.)
Sandvik Mining and Construction Tools AB
Original Assignee
Sandvik Mining and Construction Tools AB
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 Sandvik Mining and Construction Tools AB filed Critical Sandvik Mining and Construction Tools AB
Priority to EP22160150.3A priority Critical patent/EP4239159A1/fr
Priority to PCT/EP2023/055274 priority patent/WO2023166112A1/fr
Publication of EP4239159A1 publication Critical patent/EP4239159A1/fr
Withdrawn legal-status Critical Current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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids

Definitions

  • the present invention relates to a rock drill for percussive drilling, although not exclusively, especially to rock drill for top hammer drilling having a central flushing channel comprising an identification marker.
  • Percussion drill bits are widely used both for drilling relatively shallow bores in hard rock and for creating deep boreholes wherein a drill string is employed.
  • a terrestrial machine In 'top hammer drilling' a terrestrial machine is operative to transfer a combined impact and rotary drive motion to an upper end of the drill string.
  • a drill bit which has a plurality of inserts or buttons, made from a hard material, mounted on its front face is positioned at the lower end is operative to crush the rock and form the boreholes. The cuttings resulting from the rock breaking action need to be removed so that the next impact will hit solid rock again and therefore break the new rock more efficiently than if the cuttings were still present.
  • a flushing media such as water
  • a flushing media is supplied from the drill string to the front face of the drill bit through flushing holes via a central flushing channel and returned through an annual space formed between the drill string and the hole.
  • An example of a drill bit having a standard central flushing channel can for example be seen in figure 5 of EP2369127 .
  • DTH down-the-hole
  • rock drill bits in terms of serial number, to be able to be able to retrieve information and properties from the production process of the bit. From the serial number software can then be used to obtain further information about the part, for example the batch number and raw material sources. It is further desirable to be able to track drilling parameters from specific drill bits for process improvement purposes.
  • the current method of identifying drill bits is to attach a label to the bit with the product information on. The problem with this is that it easily comes detached during the drilling operation.
  • ID tag Identification
  • the problem to be solved is how to modify the drill bit design in order for the ID tag to be able to be positioned where it is protected from steel wash and abrasive wear during the drilling operation whilst still being located in a position that is readable.
  • a rock drill bit for percussive drilling comprising: a bit head having a front face; a shank that projects rearwardly from the bit head centred on an elongate bit central axis having a top end that is proximal the bit head and bottom end that is distal the bit head; an internal cavity extending through the shank; a central flushing channel extending from the top end of the cavity wherein the central flushing channel has an endmost surface; at least one flushing port extending from the endmost surface of the central flushing channel through the bit head for delivering flushing media to the front face; wherein the endmost surface of the flushing channel has an angle ⁇ measured between a first surface and a second surface on a longitudinal cross section of the bit; characterized in that there is at least one identification marker positioned on the end most surface of the central flushing channel.
  • the identification marker is positioned in this location it is protected from steel wash, abrasive wear, and the harsh environment surroundings during the drilling operation, therefore reducing the risk that the identification marker is damaged and is therefore still readable after the drilling operation, whilst also being able to be positioned in a location that is readable, for example by using a smartphone app.
  • the end most surface of the central flushing channel comprises at least one radio frequency identification (RFID) tag.
  • RFID radio frequency identification
  • the end most surface of the central flushing channel comprises at least one identification marker encoded with one-dimensional or two-dimensional optical machine-readable code.
  • identification marker encoded with one-dimensional or two-dimensional optical machine-readable code.
  • the identification marker is laser engraved on.
  • the location can be reached most easily using a laser.
  • the identification marker is a DataMatrix code.
  • a data matrix code is a two-dimensional bar code which may be in the form of a square or rectangular symbol made up of individual modules of predetermined size in the form of dots or squares. The individual modules form an ordered grid of contrasting (e.g. dark or light) modules, bordered by a finder pattern used to specify the orientation and structure of the symbol.
  • the identification tag can in this case be used to store information about a very large amount of individual sintered bodies, depending on the size of the data matrix code. The size may typically be 12x12 modules, or larger depending on needs. In an error correction algorithm, several damaged or blurred modules can be corrected for.
  • a data matrix code is used more information can be stored in a smaller area. Further, only approximately 32-72% of the data matrix code needs to be intact in order for the information to be read, therefore even if the data matrix code is slightly damaged the information can still be read. It may be preferable that the ID tag used has an industry standard associated with it.
  • ⁇ is between 120 - 180°, more preferably between 140 - 180°, even more preferably between 165-180°.
  • this angle range provides at optimal balance between readability of the identification tag and ease of manufacturing.
  • a line of sight between the endmost surface and a reader located external to the cavity and wherein the identification marker is located within the line of sight.
  • the angle of flushing port relative to the longitudinal axis is >0°.
  • this provides an increased area on the endmost surface of the central flushing channel for the identification marker to be positioned.
  • Figure 1 shows a longitudinal cross section of the rock drill bit 2 for top hammer drilling having a bit head 4 configured to be attached at one end of a drilling assembly (not shown).
  • the bit head 4 has a front face 6, with a plurality of buttons (not shown), otherwise referred to as inserts or cutters, mounted on.
  • the buttons are made of a hard material, such as cemented carbide or diamond and are usually uniformly distributed across the front face 6. The buttons engage with the material, such as rock, to be crushed during the drilling operation.
  • the bit head 4 is centred on an elongate bit central axis 12.
  • the rock drill 2 also has a shank 10 that projects rearwardly from the bit head 4.
  • the shank 10 is also centred on the elongate bit central axis 12 and has a top end 14 that is proximal to the bit head 4 and a bottom end 16 that is distal to the bit head 4, the shank 10 is hollowed out such that a cavity 18 (or bore) is formed inside.
  • the cavity 18 extends from the bottom end 16 of the shank to a longitudinal internal surface 20 at the top end 14 of the shank 14.
  • Flushing fluid which is normally water for top hammer drilling, but could be air or any other fluid suitable for flushing, is transported from the bottom end 16 to the top end 14 of the cavity 18.
  • Both the bit head 4 and the shank 10 are typically made from steel.
  • the top end 14 of the cavity 18 connects to a central flushing channel 22, which is centred around the bit central axis 12 of the shank 10, into which the flushing media is directed.
  • the central flushing channel 22 has an endmost surface 26 at its top end 14 from which one or more flushing port(s) 24 (otherwise known as flushing passages) extend from through bit head 4 to the front face 6.
  • flushing port(s) 24 also known as flushing passages
  • flushing port(s) 24 also known as flushing passages
  • the endmost surface 26 has a central point 28 located on the longitudinal axis 12. In one embodiment there is a line of sight 40 between the endmost surface 26 and a reader 42 located external to the cavity 18 and the identification marker 38 is located within the line of sight 40.
  • Figure 2 shows an enlargement of the longitudinal cross section of the rock drill bit in the region of the central flushing channel 22.
  • the longitudinal cross section of the endmost surface 26 has a first surface 30 and a second surface 34, having angle ⁇ between the first surface 30 and the second surface 34, wherein ⁇ is between 120 - 180°, preferably between 130 - 180°, more preferably between 140 - 180°, most preferably between 165 - 180°.
  • the angle of flushing port 24 relative to the longitudinal axis 12 is >0°.
  • the angle of the flushing port 24 relative to the first surface 30 or the second surface 34 is between 60-180°, preferably between 90-165°.
  • FIG. 3 shows that the end most surface 26 of the central flushing channel 22 comprises at least one identification marker 38.
  • the identification marker 38 could be for example a radio frequency identification (RFID) tag or identification marker encoded in a one-dimensional or two-dimensional optical machine-readable code.
  • RFID radio frequency identification
  • the term "one-dimensional or two-dimensional optical machine-readable code” represents a passive identification marker that can be read by an optical reading device, e.g., a camera.
  • the "one-dimensional or two-dimensional optical machine-readable code” can for example be a Quick Response (QR) code, a High-Capacity Colored Two-Dimensional Code, a European Article Number code, a DataMatrix code, or a MaxiCode.
  • QR Quick Response
  • information regarding the unique rock drill bit 2 be easily achieved via e.g., a smartphone app with access to a tool database.
  • Said information can include e.g., geometrical data and/or data regarding the material composition of the rock drill bit 2. Further information could be related to the material composition of the buttons, and the steel in the drill bit or the drilling parameters measured from the drilling operation and / or the internal production process.
  • identification marker 38 typically, only one identification marker 38 is used however it would also be possible to include more than identification marker in any combination of RFID tag(s), identification marker(s) encoded in a one-dimensional or two-dimensional optical machine-readable code and / or any other suitable identification marker(s) 38.
  • the identification marker 38 is etched, engraved, impressed, imprinted or painted on the endmost surface 26 of the central flushing channel 22.
  • a particularly suitable way of arranging the identification marker 38 is by using laser engraving.
  • Drill bit 77385348A-R48 with a diameter of 48 mm having an identification marker positioned on the end most surface of the central flushing channel was drilled in a mine in Tampere to end of bit life, 392 drill meters, the identification marker positioned on the end most surface of the central flushing channel was readable with a Datalogic220 reader and lens after drilling.
  • the identification markers were readable with Datalogic220 reader and lens after drilling.

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)
EP22160150.3A 2022-03-04 2022-03-04 Canal central de rinçage comprenant un marqueur d'identification Withdrawn EP4239159A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22160150.3A EP4239159A1 (fr) 2022-03-04 2022-03-04 Canal central de rinçage comprenant un marqueur d'identification
PCT/EP2023/055274 WO2023166112A1 (fr) 2022-03-04 2023-03-02 Canal central de chasse comportant un marqueur d'identification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22160150.3A EP4239159A1 (fr) 2022-03-04 2022-03-04 Canal central de rinçage comprenant un marqueur d'identification

Publications (1)

Publication Number Publication Date
EP4239159A1 true EP4239159A1 (fr) 2023-09-06

Family

ID=80628542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22160150.3A Withdrawn EP4239159A1 (fr) 2022-03-04 2022-03-04 Canal central de rinçage comprenant un marqueur d'identification

Country Status (2)

Country Link
EP (1) EP4239159A1 (fr)
WO (1) WO2023166112A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2628821A (en) * 1950-10-07 1953-02-17 Kennametal Inc Percussion drill bit body
US4185708A (en) * 1976-08-31 1980-01-29 Akademia Gorniczo-Hunicza im, Stanislawa Staszica Bit for drilling holes in rocks
GB2033454A (en) * 1978-10-23 1980-05-21 Fagersta Ab A rock drilling tool
AU2007200580A1 (en) * 2006-02-20 2007-09-06 Hilti Aktiengesellschaft Rock drilling head
US20090260892A1 (en) * 2005-12-09 2009-10-22 Mitsubishi Materials Corporation Drill rod, drill bit, and drilling tool
EP2369127A1 (fr) 2010-03-09 2011-09-28 Sandvik Intellectual Property AB Taillant de fleuret, ensemble de forage et procédé de perçage et perçage de roche à percussion
EP2902583A1 (fr) * 2014-01-31 2015-08-05 Sandvik Intellectual Property AB Trépan de forage de roche à percussion avec rainures à affleurement
WO2021162611A1 (fr) * 2020-02-13 2021-08-19 Epiroc Drilling Tools Aktiebolag Outil de forage et système d'identification d'outil de forage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2628821A (en) * 1950-10-07 1953-02-17 Kennametal Inc Percussion drill bit body
US4185708A (en) * 1976-08-31 1980-01-29 Akademia Gorniczo-Hunicza im, Stanislawa Staszica Bit for drilling holes in rocks
GB2033454A (en) * 1978-10-23 1980-05-21 Fagersta Ab A rock drilling tool
US20090260892A1 (en) * 2005-12-09 2009-10-22 Mitsubishi Materials Corporation Drill rod, drill bit, and drilling tool
AU2007200580A1 (en) * 2006-02-20 2007-09-06 Hilti Aktiengesellschaft Rock drilling head
EP2369127A1 (fr) 2010-03-09 2011-09-28 Sandvik Intellectual Property AB Taillant de fleuret, ensemble de forage et procédé de perçage et perçage de roche à percussion
EP2902583A1 (fr) * 2014-01-31 2015-08-05 Sandvik Intellectual Property AB Trépan de forage de roche à percussion avec rainures à affleurement
WO2021162611A1 (fr) * 2020-02-13 2021-08-19 Epiroc Drilling Tools Aktiebolag Outil de forage et système d'identification d'outil de forage

Also Published As

Publication number Publication date
WO2023166112A1 (fr) 2023-09-07

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