EP0151548A1 - Bohrmeissel für kombiniertes Dreh- und Hochdruckstrahlbohren - Google Patents

Bohrmeissel für kombiniertes Dreh- und Hochdruckstrahlbohren Download PDF

Info

Publication number
EP0151548A1
EP0151548A1 EP85400124A EP85400124A EP0151548A1 EP 0151548 A1 EP0151548 A1 EP 0151548A1 EP 85400124 A EP85400124 A EP 85400124A EP 85400124 A EP85400124 A EP 85400124A EP 0151548 A1 EP0151548 A1 EP 0151548A1
Authority
EP
European Patent Office
Prior art keywords
cutter
channels
edges
cutter according
attack
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Withdrawn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
EP85400124A
Other languages
English (en)
French (fr)
Inventor
Alain André Gustave Régis Hurel
Georges Augustin Cagnioncle
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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 Charbonnages de France CDF filed Critical Charbonnages de France CDF
Publication of EP0151548A1 publication Critical patent/EP0151548A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • E21B10/02—Core bits
    • E21B10/04—Core bits with core destroying means
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
    • 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
    • E21B17/18—Pipes provided with plural fluid passages
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems

Definitions

  • the present invention relates to rotary drilling drill bits assisted by high-pressure jets and more precisely aims at the geometry and the configuration, in position and in orientation relative to the axis of rotation of the cutting edges, of the supply channels for assistance fluid. who are spared there.
  • a cutter is a drilling tool for mines, quarries and public works in particular, which is mounted at the end of a perforator bar for its rotational drive around a longitudinal axis and its penetration in a rock along this axis. To this end, it comprises, opposite said bar, at least one axially projecting attack edge with which is associated a debris discharge ramp. Such an edge is generally formed on a high hardness wafer, most often made of tungsten carbide, reported by brazing to the cutter.
  • the holes thus drilled are typically 20 to 200 mm in diameter.
  • Patent application 82.21674 filed by the Applicants on December 23, 1982 thus proposed a new cutting geometry according to which leading edges are arranged in axial projection with respect to a discontinuous, fragmented crown. by debris discharge ramps, defining a bowl provided at its bottom with a central spark gap, supply channels for assistance fluid under high pressure emerging from the crown near the leading edges.
  • This new geometry has made it possible to use shorter attack edges than before, capable of transmitting higher destruction stresses to the rock than before, which has led to improved performance.
  • these improved cutting edges comprise, like the conventional cutting edges, supply channels for rinsing fluid, under a pressure of a few MPa.
  • the inlet channels contribute to the drilling of a rock by the digging, by the jets of fluid which they produce, of grooves in the rock in front of the edges of attack, from where a lowering of the characteristics apparent mechanics of the latter.
  • the speeds of rotation of the cutters being always significantly higher than the speeds of advance of the latter, each jet is brought to deepen its own bleeding in the rock, to a maximum depth quickly reached.
  • the Applicants have thus found that it is possible to increase the efficiency of a given number of jets by making them work in as many baths as possible, by advantageously making each of the jets work in a different groove.
  • the invention thus proposes a rotary drilling cutter assisted by high pressure jets intended to be mounted at the end of a rotary hammer bar for its rotational drive around a longitudinal axis and its penetration in a rock, of the kind comprising, at the opposite of said bar, at least one axially projecting leading edge with which is associated a debris discharge ramp, in combination with a plurality of at least two pressurized fluid supply channels, intended to be placed in communication through the hole punch bar with a source of pressurized fluid in order to generate assistance jets adapted to erode the rock in front of the cutter, distributed in a succession of at least two sets of channels offset angularly, each comprises at least one feed channel, this cutter being characterized in that the configuration of the feed channels relative to the longitudinal axis of the cutter varies from game to game.
  • the invention recommends maintaining the association of jets and attack edges, preferably at the rate of one jet per edge, so as to limit the number of channels while individually assisting each of the edges.
  • the jets thus produced are preferably convergent with these edges, in respective zones different from the latter. These jets are advantageously flush (at an incidence of some 10 ° to 20 ° for example) the longitudinal attack faces bordered by the attack edges to provide hydraulic protection and to cool them.
  • the invention applies very particularly, but not exclusively, to the aforementioned case of cutters with a discontinuous crown, with assistance jets intercepting the annular surface swept in rotation by the attack edges so as to attack the rock opposite this crown.
  • a cutter 1 according to the invention shown by way of example in FIGS. 1 to 3, comprises, in known manner, a skirt 2 internally threaded over a part of its length along an axis ZZ, extended by a larger diameter drilling head 3.
  • the skirt 2 is intended to engage, by screwing, on a rod or perforator bar (not shown) intended to drive the cutter 1 in rotation about the axis Z-Z. Beyond a threaded part 2a, this skirt defines a chamber 4, called the low pressure chamber, intended to be connected, through the perforator bar, to a source of rinsing fluid at a pressure of a few MPa (of 2 to 4 MPa for example). As shown, this chamber is extended axially by a neck 5 opening into a chamber 6, called a high pressure chamber, which, according to the invention, is of larger diameter than the neck. The neck is intended to cooperate with a central tube of the perforator bar so as to put the chamber 6 in communication with a high pressure source of assistance fluid under a pressure markedly greater than that of the rinsing fluid, generally greater than 100 MPa.
  • each of the chambers 4 and 6 leaves a set of three pipes 7 and 8, respectively, which open into the head of drill hole 3 of the cutting edge.
  • the drilling head is connected to the skirt 2 by a frustoconical segment 9 in which, however, advantageously are provided recesses 10, three in number in the example shown, the role of which will appear below.
  • the cutter 1 comprises, opposite the skirt 2, therefore opposite the hole punch bar, a plurality of attack edges 11, three in the example shown, made of hard materials such as tungsten carbide, synthetic diamond, etc. arranged in axial projection with respect to a discontinuous ring 12, fragmented by debris discharge ramps 13 (one ramp for each edge).
  • This discontinuous ring delimits a bowl 14 provided with a bottom 14a adapted to receive a central spark gap (not shown) such as a cone, possibly off-center with respect to the axis Z-Z of the cutting edge.
  • This bottom 14a has for this purpose a recess 15, of cylindrical shape in the example considered.
  • these plates have substantially longitudinal attack faces 16a, situated in planes containing the axis ZZ, and which are bordered laterally by internal and external edges 16b and 16c respectively, which project radially inwards. and the outside with respect to the discontinuous crown 12.
  • the debris discharge ramps 13 comprise a longitudinal flank 13a which extends the leading face of the associated plate, and an inclined flank 13b, substantially perpendicular to the flank 13a but inclined relative to the axis ZZ of the cutting edge. This flank 13b extends axially up to the skirt 2.
  • the recesses 10 above are intended to collaborate with these ramps to facilitate the evacuation of rock debris and reduce the friction of the cutter along the drilled hole. They are arranged perpendicular to the sides 13a of the ramps, under the locations of the plates.
  • the channels 7 for supplying flushing fluid coming from the low pressure chamber 4 are axial and open into the inclined sides 13b of the discharge ramps. It will be noted that these channels are as far apart as possible from the axis of the cutting edge and take their source in the chamber 4 at the outer periphery of the latter. These channels have identical configurations with respect to the Z - Z axis.
  • channels 8 coming from the high pressure chamber 6 there is not the same for the channels 8 coming from the high pressure chamber 6: according to an essential characteristic of the invention these channels, angularly offset, all three have different configurations, in position and in orientation, vis-à-vis ZZ axis screw.
  • the channels 8a, 8b and 8c, corresponding to increasing distances from the axis ZZ, are shown schematically by their axes and their mouths near the locations intended to receive the wafers .
  • Channels 8a and 8c are shown in Figure 1. In the example shown, these channels 8a, 8b and 8c have inclinations of 32 °, 45 ° and 36 ° respectively.
  • Each of these channels is associated with an attack edge; according to an advantageous characteristic of the invention, these channels are oriented in directions converging with the associated edges, as can be seen from FIG. 3 where the assistance jets which spring up are represented by arrows 20a, 20b and 20c channels 8a, 8b and 8c respectively.
  • These high pressure jets intercept the annular surface swept in rotation by the edges 11 in the extension of the discontinuous ring 12.
  • the jet 20a converges towards the radially internal end of the associated edge 11; the jet 20b, towards the radially external end of the associated edge; and jet 20c, towards the middle of the associated edge.
  • these channels do not open in the immediate vicinity of the edges, since they open out substantially at the bottom of the bowl 14, more precisely, radially facing the discharge ramps 13. It turned out in fact that the loss of coherence of the jets remains limited, however; this configuration is particularly suitable for cutters for hard rocks giving rise to very fine drilling debris: it is then possible to reduce the height of the crown 12 and therefore that of the inserts, and therefore reduce the progressive decohesion of the jets.
  • the high-pressure fluid supply channels open on the contrary through plates 16 pierced for this purpose, which are thus cooled.
  • the assistance fluid supply channels originate at the periphery of the high pressure chamber 6 which, taking into account the constraints imposed on the channels 8, must have the enlarged shape shown in FIG. 1.
  • the invention applies of course to the more general case of sets of channels, each advantageously associated with an edge, comprising several channels, for example aligned radially, in front or in back of the leading edges, or even through the plates carrying these edges.
  • these assistance fluid supply channels 8 are not coplanar with the axis of rotation ZZ, but are inclined relative to the latter by being located in planes respectively parallel to this axis, at a distance from it which varies from one channel to another: this allows the jets to converge with the leading edges by licking the leading faces although these edges and these faces are located, in the example considered, in planes containing the axis.
  • jets can provide a triple function of assistance, rinsing and cooling.
  • a cutter in accordance with the invention allows drilling, in hard or abrasive terrains, at a speed of the order of a meter per minute and at diameters not exceeding 60 mm, using Jumbos which use foils of a determined length, without extension bar.

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)
EP85400124A 1984-02-01 1985-01-25 Bohrmeissel für kombiniertes Dreh- und Hochdruckstrahlbohren Withdrawn EP0151548A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8401540 1984-02-01
FR8401540A FR2558891B1 (fr) 1984-02-01 1984-02-01 Taillant de foration rotative assistee par jets haute pression

Publications (1)

Publication Number Publication Date
EP0151548A1 true EP0151548A1 (de) 1985-08-14

Family

ID=9300664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400124A Withdrawn EP0151548A1 (de) 1984-02-01 1985-01-25 Bohrmeissel für kombiniertes Dreh- und Hochdruckstrahlbohren

Country Status (2)

Country Link
EP (1) EP0151548A1 (de)
FR (1) FR2558891B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830124A (en) * 1986-01-21 1989-05-16 Shell Oil Company Rotary drill bit

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878292A (en) * 1931-03-13 1932-09-20 Felix L Pivoto Drill bit
DE912202C (de) * 1941-06-15 1954-05-28 Boehler & Co Ag Geb Gesteinsbohrer oder Bohrkrone mit Hartmetallschneiden
BE519905A (de) * 1952-06-13 1955-05-27
US2740612A (en) * 1954-02-23 1956-04-03 Phipps Orville Two-arm rotary drill bit
US2800303A (en) * 1953-05-12 1957-07-23 Ingersoll Rand Co Rock drilling tool
US3112803A (en) * 1962-01-02 1963-12-03 Jersey Prod Res Co Diamond drill bit
FR1406000A (fr) * 1964-06-04 1965-07-16 Aquitaine Petrole Perfectionnements aux outils rotatifs de forage à lames fluides et procédé de fabrication d'un tel outil
US3645346A (en) * 1970-04-29 1972-02-29 Exxon Production Research Co Erosion drilling
FR2388982A1 (fr) * 1977-04-25 1978-11-24 Christensen Inc Trepan de forage au diamant pour roches tendres et demi-dures
FR2450936A1 (fr) * 1979-03-08 1980-10-03 Cagnioncle Georges Nouvelle foreuse rotative a taillant protege par un film fluide a tres haute pression
GB2047308A (en) * 1979-05-02 1980-11-26 Christensen Inc Drill bit for well drilling
GB2085945A (en) * 1980-10-21 1982-05-06 Christensen Inc Rotary drill bit
US4391339A (en) * 1978-08-04 1983-07-05 Hydronautics, Incorporated Cavitating liquid jet assisted drill bit and method for deep-hole drilling
FR2538442A1 (fr) * 1982-12-23 1984-06-29 Charbonnages De France Taillant pour foration rotative assistee par jet

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878292A (en) * 1931-03-13 1932-09-20 Felix L Pivoto Drill bit
DE912202C (de) * 1941-06-15 1954-05-28 Boehler & Co Ag Geb Gesteinsbohrer oder Bohrkrone mit Hartmetallschneiden
BE519905A (de) * 1952-06-13 1955-05-27
US2800303A (en) * 1953-05-12 1957-07-23 Ingersoll Rand Co Rock drilling tool
US2740612A (en) * 1954-02-23 1956-04-03 Phipps Orville Two-arm rotary drill bit
US3112803A (en) * 1962-01-02 1963-12-03 Jersey Prod Res Co Diamond drill bit
FR1406000A (fr) * 1964-06-04 1965-07-16 Aquitaine Petrole Perfectionnements aux outils rotatifs de forage à lames fluides et procédé de fabrication d'un tel outil
US3645346A (en) * 1970-04-29 1972-02-29 Exxon Production Research Co Erosion drilling
FR2388982A1 (fr) * 1977-04-25 1978-11-24 Christensen Inc Trepan de forage au diamant pour roches tendres et demi-dures
US4391339A (en) * 1978-08-04 1983-07-05 Hydronautics, Incorporated Cavitating liquid jet assisted drill bit and method for deep-hole drilling
FR2450936A1 (fr) * 1979-03-08 1980-10-03 Cagnioncle Georges Nouvelle foreuse rotative a taillant protege par un film fluide a tres haute pression
GB2047308A (en) * 1979-05-02 1980-11-26 Christensen Inc Drill bit for well drilling
GB2085945A (en) * 1980-10-21 1982-05-06 Christensen Inc Rotary drill bit
FR2538442A1 (fr) * 1982-12-23 1984-06-29 Charbonnages De France Taillant pour foration rotative assistee par jet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830124A (en) * 1986-01-21 1989-05-16 Shell Oil Company Rotary drill bit

Also Published As

Publication number Publication date
FR2558891A1 (fr) 1985-08-02
FR2558891B1 (fr) 1986-11-07

Similar Documents

Publication Publication Date Title
FR2538442A1 (fr) Taillant pour foration rotative assistee par jet
BE1014353A5 (fr) Element coupant et trepan tournant utilisant cet element.
US10794118B2 (en) Fixed cutter bits and other downhole tools having non-planar cutting elements thereon
CA2639183C (fr) Fraise a rainurer pour usinage a grande avance et a faible profondeur de passe
US5535839A (en) Roof drill bit with radial domed PCD inserts
EP1627703B1 (de) Tiefbohrkopf und Tiefbohrverfahren zur Bohrung eines Werkstücks
AU2001288875B2 (en) Method and bit for directional horizontal boring
EP0169110B1 (de) Bohrwerkzeuge mit Wasserdurchlässen zur Erzielung einer hohen Reinigungswirkung der Angriffsfläche
FR2495216A1 (fr) Trepan de forage
US6932172B2 (en) Rotary contact structures and cutting elements
US4442909A (en) Drill bit
FR2753745A1 (fr) Trepan de forage
FR2713698A1 (fr) Trépan de forage à pièces rapportées calibrées coupantes libres avec angles de sécurité .
AU2001288875A1 (en) Method and bit for directional horizontal boring
JPH06336891A (ja) 多ブレード傾斜ボーリング・ヘッド
NO851740L (no) Skjaerenhet.
RU2394145C1 (ru) Буровое шарошечное долото с центральной промывкой
US20040231894A1 (en) Rotary tools or bits
EP0170548B1 (de) Bohrwerkzeuge zur Erzielung einer grossen Reinigungswirkung der Angriffsfläche
EP0151548A1 (de) Bohrmeissel für kombiniertes Dreh- und Hochdruckstrahlbohren
FR2656554A1 (fr) Outil de percage de precision pour materiaux composites.
EP0296208B1 (de) Bohrmeissel mit gerichtetem spülflüssigkeitsstrahl
RU2696741C1 (ru) Лопастное долото с износостойкой режущей структурой (варианты)
US20020066600A1 (en) Rotary tools or bits
FR2605676A1 (fr) Outil a abrasifs ultradurs pour tete de creusement et procede de fabrication d'un tel outil

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860122

17Q First examination report despatched

Effective date: 19870320

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19870801

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HUREL, ALAIN ANDRE GUSTAVE REGIS

Inventor name: CAGNIONCLE, GEORGES AUGUSTIN