EP0083287B1 - Bouton en matériau dur pour outil de perforation - Google Patents

Bouton en matériau dur pour outil de perforation Download PDF

Info

Publication number
EP0083287B1
EP0083287B1 EP82402381A EP82402381A EP0083287B1 EP 0083287 B1 EP0083287 B1 EP 0083287B1 EP 82402381 A EP82402381 A EP 82402381A EP 82402381 A EP82402381 A EP 82402381A EP 0083287 B1 EP0083287 B1 EP 0083287B1
Authority
EP
European Patent Office
Prior art keywords
button
teeth
hard material
stud
tooth
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
Application number
EP82402381A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0083287A1 (fr
Inventor
Marcel Techy
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.)
Stenuick Freres SA
Original Assignee
Stenuick Freres SA
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 Stenuick Freres SA filed Critical Stenuick Freres SA
Priority to AT82402381T priority Critical patent/ATE15249T1/de
Publication of EP0083287A1 publication Critical patent/EP0083287A1/fr
Application granted granted Critical
Publication of EP0083287B1 publication Critical patent/EP0083287B1/fr
Expired 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts

Definitions

  • the present invention is in the field of drilling. More particularly, it relates to drilling tools, for example cutters for pneumatic hammers, perforators or tricones.
  • FIG. 1 shows a conventional cutter consisting of a head 1 extended by a tail 2 intended to be placed for example at the end of the elongated tubes of a down-the-hole pneumatic hammer.
  • the working surface 3 of the head is pierced with cells 4 in which the buttons 5 are crimped.
  • FIG. 1 a part of the head 1 has been shown in section to clearly show the structure of cell 4 and of the button 5.
  • buttons 5 are made of very hard material, for example tungsten carbide, stellite, boron carbide, ceramic, etc.
  • the shape of the cell 4 is generally cylindrical and the corresponding button is also cylindrical, but it has a diameter slightly greater than that of the cell 4.
  • the inner wall of the cell 4 and the outer surface of the button 5 are carefully adjusted for crimping the button 5 in the socket 4.
  • the positioning of the button can be done by means of a hydraulic press or a pneumatic hammer with or without temperature difference between the two elements to be crimped.
  • buttons perform a very efficient drilling job, they nevertheless have some drawbacks. In particular, it happens that after a certain operating time the button is no longer secured to the cell in which it has been crimped and starts to rotate on itself, in its cell, thus becoming much less effective.
  • US-A-3,389,761 describes a button which is not smooth but has teeth located along generatrices of the surface of the body of the button. However, such a button is also likely to come out of its cell during impacts to the tool carrying the button because no retention of the button is ensured in the longitudinal direction.
  • buttons are liable to separate from the cell in which they are housed. This problem is serious for all the buttons crimped on the surface of the working tool, but it is even more serious for the buttons placed on the periphery of the tool because they are subjected to friction on the wall of the drilled hole. .
  • the present invention overcomes these drawbacks. It targets a button capable of being crimped into a cell in a very secure manner, that is to say without risk of separation of the button and its cell.
  • the invention also relates to a perforation tool provided with buttons according to the invention, that is to say a very reliable tool.
  • the invention applies to a hard material button for a perforation tool, consisting of a head for the actual drilling work, extended by a body, preferably cylindrical, intended to be crimped at the end. of the tool, in a cell of dimensions slightly smaller than those of the body, in which the external surface of the body has teeth intended to penetrate into the internal wall of the cell during crimping of the button in the cell.
  • the teeth are located along helices traced on the surface of the body.
  • the teeth are of triangular section and it is advantageous to produce each tooth with an apex angle of a value of approximately 90 °.
  • the teeth may also be of trapezoidal or semi-circular section.
  • each tooth is constant over the entire length of the tooth, while in a second embodiment, which will be preferred to the first mode, the height of each tooth n is not constant, but it decreases linearly from a maximum height, at the end of the tooth located towards the head of the button, to a zero height at the other end of the button.
  • Figures 2 and 3 both show buttons consisting of a head 6 for the actual drilling work, extended by a cylindrical body 7 intended to be crimped at the end of a tool such as the tool of the Figure 1, in a cylindrical cell 4.
  • the outer surface of the body 7 has helical teeth 8 intended to penetrate the inner wall of the cell 4 during crimping of the button in the cell.
  • FIG. 4 show a button in which the teeth 8 have a constant height over their entire length.
  • the body 7 of the button has a diameter of value D at its two ends and at the bottom of the teeth.
  • a value D was of course provided slightly greater than the value D ′.
  • a circle of diameter D ′ is shown in dotted lines, in order to be able to compare this diameter with the diameter D of the button.
  • the teeth 8 all have an apex angle of approximately 90 °.
  • the diameter on top of the teeth 8 has been identified in the figures by DM ".
  • the value D M " is of course greater than D and therefore D '.
  • FIGS. 3, 4 and 5 show a button in which the teeth have a height which decreases linearly from one end to the other of the tooth.
  • the diameter D of the body 7 of the button at its two ends and at the bottom of the teeth is the same as that of the button in FIG. 2.
  • the angle at the top of the teeth 8 is always around 90 ° but the height of the tooth decreases linearly from a maximum height at the end of the tooth located towards the head of the button (see Figure 4) to a zero height at the other end of the button: In Figure 5, this height is almost zero.
  • the diameter on the top of the teeth has been identified by DM "in FIG. 4, where this diameter is maximum. In FIG. 5, this diameter being almost zero, has been identified by D" m , the value D " m being practically equal to D.
  • the button in Figure 3 is actually anchored in the cell 4 during crimping. Indeed, in addition to the initial tightening of a value D-D ', the total penetration of the teeth 8 into the socket is added. The conical shape of the teeth allows easier mounting of the button in the socket.
  • the button according to the invention has great advantages:
  • the button is unable to turn on itself, in its cell.
  • the production of a button according to the invention is not much more difficult than the production of a smooth button.
  • the helical teeth can be obtained during sintering or by any other process.
  • teeth whose section would not be triangular but trapezoidal or semi-circular or whose sides would be for example involute of circle.
  • buttons whose external surface of the body is not cylindrical, but for example conical, the structure and the arrangement of the teeth being similar to those described above, for example during the description of the figure 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Laminated Bodies (AREA)
  • Contacts (AREA)
  • Adornments (AREA)
EP82402381A 1981-12-24 1982-12-24 Bouton en matériau dur pour outil de perforation Expired EP0083287B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82402381T ATE15249T1 (de) 1981-12-24 1982-12-24 Knopffoermiger hartmaterialeinsatz fuer bohrmeissel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8124209A FR2519064A1 (fr) 1981-12-24 1981-12-24 Bouton en materiau dur pour outil de perforation et outil comportant un tel bouton
FR8124209 1981-12-24

Publications (2)

Publication Number Publication Date
EP0083287A1 EP0083287A1 (fr) 1983-07-06
EP0083287B1 true EP0083287B1 (fr) 1985-08-28

Family

ID=9265388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402381A Expired EP0083287B1 (fr) 1981-12-24 1982-12-24 Bouton en matériau dur pour outil de perforation

Country Status (5)

Country Link
EP (1) EP0083287B1 (enrdf_load_stackoverflow)
AT (1) ATE15249T1 (enrdf_load_stackoverflow)
DE (1) DE3265914D1 (enrdf_load_stackoverflow)
ES (1) ES276309Y (enrdf_load_stackoverflow)
FR (1) FR2519064A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5678645A (en) * 1995-11-13 1997-10-21 Baker Hughes Incorporated Mechanically locked cutters and nozzles
US7416035B2 (en) * 2003-08-13 2008-08-26 Smith International, Inc. Shaped inserts with increased retention force
AU2007201463B2 (en) * 2003-08-13 2010-09-09 Sandvik Intellectual Property Ab Shaped inserts with increased retention force
RU2604885C1 (ru) * 2016-02-26 2016-12-20 Николай Митрофанович Панин Буровое долото
EP3696368B1 (en) * 2019-02-15 2023-10-11 Sandvik Mining and Construction Tools AB Insert for a journal leg of a rotary drill tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1112446A (en) * 1965-08-18 1968-05-08 Tungsten Carbide Dev Ltd Improvements in or relating to coal-cutter picks and the like with hard metal tips
US3382940A (en) * 1965-10-21 1968-05-14 Frank E. Stebley Percussion drill bit
US3389761A (en) * 1965-12-06 1968-06-25 Dresser Ind Drill bit and inserts therefor
US3581835A (en) * 1969-05-08 1971-06-01 Frank E Stebley Insert for drill bit and manufacture thereof
US3603414A (en) * 1970-01-30 1971-09-07 Frank E Stebley Insert for drilling unit
CA1093066A (en) * 1977-06-10 1981-01-06 David C. Dick Percussion rock bit
US4271917A (en) * 1979-04-09 1981-06-09 Syndrill Products Joint Venture Locking device for hard metal inserts

Also Published As

Publication number Publication date
DE3265914D1 (en) 1985-10-03
EP0083287A1 (fr) 1983-07-06
ATE15249T1 (de) 1985-09-15
ES276309U (es) 1984-05-01
FR2519064A1 (fr) 1983-07-01
FR2519064B1 (enrdf_load_stackoverflow) 1984-07-13
ES276309Y (es) 1984-12-16

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