EP0168379A1 - Outil de forage, en particulier trépan de forage - Google Patents

Outil de forage, en particulier trépan de forage Download PDF

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Publication number
EP0168379A1
EP0168379A1 EP85890130A EP85890130A EP0168379A1 EP 0168379 A1 EP0168379 A1 EP 0168379A1 EP 85890130 A EP85890130 A EP 85890130A EP 85890130 A EP85890130 A EP 85890130A EP 0168379 A1 EP0168379 A1 EP 0168379A1
Authority
EP
European Patent Office
Prior art keywords
drilling tool
recess
tool according
drilling
rock
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
EP85890130A
Other languages
German (de)
English (en)
Other versions
EP0168379B1 (fr
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
Priority to AT85890130T priority Critical patent/ATE35018T1/de
Publication of EP0168379A1 publication Critical patent/EP0168379A1/fr
Application granted granted Critical
Publication of EP0168379B1 publication Critical patent/EP0168379B1/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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure

Definitions

  • the invention relates to a drilling tool, in particular a drill bit for liquid-jet-assisted drilling in rock.
  • Drilling tools whether for hammering or rotating drilling in rock, have to perform various tasks.
  • the rock can be subjected to relatively high compressive loads, whereas the tensile strength of rock is generally low.
  • the drill bit now serves as a force-transmitting element between the drill drive and the rock.
  • the rock is initially elastically deformed due to the force exerted by the drill bit, in particular the cutting edges, whereby pressure cracks and shear cracks occur in the rock at the same time.
  • rock particles have to be removed from the dressing and removed from the immediate area of effectiveness of the cutting edges.
  • Such removal must therefore be carried out so that the energy applied by the drilling unit is not used to further shred the cuttings, as a result of which a cushion is built up between the rock to be removed and the cutting edges.
  • fluids in particular gases or liquids.
  • the liquids can also have suspended matter so that even heavier substances can be discharged from the borehole.
  • the rock mining is not supported by such flushing liquids.
  • the water jet enters cracks, cracks and the like which already exist or which have arisen due to the force of the drill bit, and loosens the rock structure, so that the Liquid jet, especially water jet, an additional ablative effect is attributable.
  • This effect usually occurs at a pressure between 500 and 4000 bar.
  • the jet can cooperate with the cutting edges of the drill bit, that is to say that the jets are directed to those places of the rock where the cracks occur. If one takes into account that there is a close interaction between crack growth and arrangement of the cutting edges on the drill bit, the high importance of the exact alignment of the liquid jet or jets becomes particularly clear.
  • the liquid jets exit the drilling tool through nozzles, the nozzles being made of corundum, for example, and having a passage opening that is only a fraction of a millimeter. Since the nozzles generally have a shorter service life than the drill bits as such, these nozzles should be releasably connected to the drill bit.
  • the present invention has for its object to provide a drilling tool for liquid jet-assisted, in particular rotating drilling in rock, in which the nozzles for the liquid jet, in particular water jet, are precisely positioned, with an exchange of these nozzles an identical water jet direction as before the exchange should be guaranteed.
  • the drilling tool according to the invention for liquid-jet-assisted, in particular rotating, drilling in rock, with a drilling tool body, which in particular has cutting edges constructed with hard metal; slots or the like, with at least one feed for a fluid pressure medium with a pressure between 500 and 4000 bar , which opens into at least one nozzle detachably inserted in the drilling tool body, consists essentially in that the nozzle is constructed with a nozzle block and a holding body which extends longitudinally in the beam direction, the holding body being detachably held via a ring body in a recess, in particular a bore of the drilling tool body .
  • the nozzle block is contained in a holding body extending longitudinally in the jet direction, it can be held completely exactly over the ring body in the recess of the drilling tool body, so that an exact and reproducible fixing of the nozzle block and thus the high-pressure jet is achieved, with an exchange of the Nozzle can be carried out by easy-to-use tools, if necessary on site.
  • the holding body has at least one rotationally symmetrical guide surface which rests on a correspondingly designed guide surface of the ring body, particularly precise and exact positioning can be achieved. If the holding body has a cylindrical projection, in particular a shaft, which bears against a cylindrical recess in the ring body, one is particularly suitable easy to manufacture embodiment, which can be manufactured particularly precisely.
  • the shaft has a longitudinally extending recess for the passage of the already bundled liquid jet, then the actually effective part of the nozzle, namely the nozzle stone, is particularly well protected against mechanical damage, while at the same time any cross-section of the liquid line that can be chosen in front of the Nozzle block is guaranteed so that an unnecessary loss of pressure can be avoided.
  • the nozzle can be exchanged particularly easily if the ring body has an external thread and the recess in the drilling tool body has a corresponding internal thread.
  • the ring body has a polygon, in particular an polygon.
  • the recess in the drilling tool body has a conical seat for the holding body of the nozzle block, self-adjustment is ensured in a particularly advantageous manner.
  • a sealing ring is provided in an annular recess between the seat in the recess of the drilling tool body and the holding part for the nozzle, then a particularly permanent sealing can take place with little effort and thus little deformation of the seat.
  • a particularly simple variant of the nozzle body is obtained if the annular recess for the Sealing ring is provided in the seat of the recess in the drilling tool body.
  • FIG. 1 shows a drill bit in a side view
  • FIG. 2 shows a drill bit in a top view
  • FIG. 3 shows a section through a nozzle in the drill bit.
  • the drill bit consists of a drilling tool body 1 which is provided with cutting edges 2 made of hard metal. Instead of the cutting edges, diamonds or other cutting inserts embedded in the core bit material can also be provided.
  • the drilling tool body also has a feed 3 for the fluid pressure medium, namely water. This feed branches into several feeds 4, only two of which are shown, which open into the schematically illustrated nozzles 5.
  • FIG. 2 which shows a top view of the drill bit according to FIG. 1, the nozzles 5 are arranged in a specific manner depending on the cutting edges 2.
  • a recess 6 is shown in the drilling tool body 1, which has an internal thread 7.
  • This recess has an annular extension 8 on its base, which merges into a conical seat 9.
  • the water jet emerges in the direction of arrow a.
  • the holding body 10 is provided with a nozzle block 11, the nozzle block being arranged in a cylindrical recess in the holder body, for example fixed by a plastic compound 12.
  • the holding body 10 has a cylindrical shaft 13, the cylindrical guide surface 14 cooperates with the cylindrical guide surface 15 of the ring body 16.
  • the holding body 10 has a longitudinally extending recess 17 through which the water jet exits in the direction of arrow a.
  • the passage opening of the nozzle block is substantially smaller than the free cross section of this recess 17.
  • the ring body 16 has an external thread 18 which cooperates with the internal thread 7. Furthermore, the ring body has a hexagon 19 on the end of the drill bit facing the free surface, which hexagon 19 is used to attack a corresponding Allen key or the like.
  • an annular groove 20 is provided, in which a sealing ring 21 is arranged.
  • Other drilling tools that can be used are, for example, those with drilling rollers, pins, corundum or diamond studded or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
EP85890130A 1984-06-18 1985-06-14 Outil de forage, en particulier trépan de forage Expired EP0168379B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85890130T ATE35018T1 (de) 1984-06-18 1985-06-14 Bohrwerkzeug, insbesondere bohrkrone.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/621,867 US4611672A (en) 1984-06-18 1984-06-18 Drill bit
US621867 2000-07-21

Publications (2)

Publication Number Publication Date
EP0168379A1 true EP0168379A1 (fr) 1986-01-15
EP0168379B1 EP0168379B1 (fr) 1988-06-08

Family

ID=24491990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890130A Expired EP0168379B1 (fr) 1984-06-18 1985-06-14 Outil de forage, en particulier trépan de forage

Country Status (4)

Country Link
US (1) US4611672A (fr)
EP (1) EP0168379B1 (fr)
AT (1) ATE35018T1 (fr)
DE (1) DE3563234D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4878548A (en) * 1988-01-21 1989-11-07 Eastman Christensen Nozzle retention system for a drill bit
RU2016111932A (ru) * 2011-02-25 2018-11-27 СиЭмТиИ ДЕВЕЛОПМЕНТ ЛИМИТЕД Гидравлическая режущая головка
US11235397B2 (en) 2016-12-16 2022-02-01 Kennametal Inc. Side-activated modular drill
US10207337B2 (en) 2017-04-04 2019-02-19 Kennametal Inc. Front-loaded, side-activated modular drill
DE102019116160A1 (de) 2018-06-20 2019-12-24 Kennametal Inc. Seitlich geschlossener modularer Bohrer mit federunterstütztem Auswurf
US11090736B2 (en) 2018-12-10 2021-08-17 Kennametal Inc. Side-activated modular drill
US11471952B2 (en) 2020-03-19 2022-10-18 Kennametal Inc. Cutting tool having replaceable cutting head and method of securing a replaceable cutting head
US11883888B2 (en) 2021-06-28 2024-01-30 Kennametal Inc. Modular drill with enhanced bump-off capability
US11708736B1 (en) * 2022-01-31 2023-07-25 Saudi Arabian Oil Company Cutting wellhead gate valve by water jetting

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950090A (en) * 1957-08-01 1960-08-23 H C Smith Oil Tool Co Mounting for discharge beans in well drilling bits
US3120284A (en) * 1959-08-17 1964-02-04 Globe Oil Tools Co Jet nozzle for drill bit
US3129777A (en) * 1962-08-07 1964-04-21 Hughes Tool Co Replaceable nozzle having completely shrouded retainer
US3823789A (en) * 1973-05-18 1974-07-16 Smith International Drill bit center jet
DE3007659A1 (de) * 1979-03-02 1980-09-04 Hall & Pickles Ltd Wasserspruehduese
DE3029963A1 (de) * 1980-08-07 1982-03-04 Flow Industries, Inc., Kent, Wash. Duese und verfahren zum stroemungsmittelstrahl-bohren
US4360069A (en) * 1980-07-21 1982-11-23 Kenneth Davis Diamond drill bits
GB2104942A (en) * 1981-08-31 1983-03-16 Smith International Rock bit with cavitation nozzle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179189A (en) * 1962-07-30 1965-04-20 Globe Oil Tools Co Bit for drilling wells
US3207241A (en) * 1963-04-08 1965-09-21 Smith Tool Co Jet bits
US3389759A (en) * 1966-11-16 1968-06-25 Gulf Research Development Co Retrievable piston advance jet bits
US3645346A (en) * 1970-04-29 1972-02-29 Exxon Production Research Co Erosion drilling
US3688853A (en) * 1971-03-01 1972-09-05 William C Maurer Method and apparatus for replacing nozzles in erosion bits
US4306627A (en) * 1977-09-22 1981-12-22 Flow Industries, Inc. Fluid jet drilling nozzle and method
US4185706A (en) * 1978-11-17 1980-01-29 Smith International, Inc. Rock bit with cavitating jet nozzles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950090A (en) * 1957-08-01 1960-08-23 H C Smith Oil Tool Co Mounting for discharge beans in well drilling bits
US3120284A (en) * 1959-08-17 1964-02-04 Globe Oil Tools Co Jet nozzle for drill bit
US3129777A (en) * 1962-08-07 1964-04-21 Hughes Tool Co Replaceable nozzle having completely shrouded retainer
US3823789A (en) * 1973-05-18 1974-07-16 Smith International Drill bit center jet
DE3007659A1 (de) * 1979-03-02 1980-09-04 Hall & Pickles Ltd Wasserspruehduese
US4360069A (en) * 1980-07-21 1982-11-23 Kenneth Davis Diamond drill bits
DE3029963A1 (de) * 1980-08-07 1982-03-04 Flow Industries, Inc., Kent, Wash. Duese und verfahren zum stroemungsmittelstrahl-bohren
GB2104942A (en) * 1981-08-31 1983-03-16 Smith International Rock bit with cavitation nozzle

Also Published As

Publication number Publication date
US4611672A (en) 1986-09-16
EP0168379B1 (fr) 1988-06-08
DE3563234D1 (en) 1988-07-14
ATE35018T1 (de) 1988-06-15

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