WO1995034740A1 - Appareil de forage - Google Patents

Appareil de forage Download PDF

Info

Publication number
WO1995034740A1
WO1995034740A1 PCT/FI1994/000249 FI9400249W WO9534740A1 WO 1995034740 A1 WO1995034740 A1 WO 1995034740A1 FI 9400249 W FI9400249 W FI 9400249W WO 9534740 A1 WO9534740 A1 WO 9534740A1
Authority
WO
WIPO (PCT)
Prior art keywords
bit
drilling apparatus
ring
drilling
ring bit
Prior art date
Application number
PCT/FI1994/000249
Other languages
English (en)
Inventor
Valto ILOMÄKI
Original Assignee
Ilomaeki Valto
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 Ilomaeki Valto filed Critical Ilomaeki Valto
Priority to PCT/FI1994/000249 priority Critical patent/WO1995034740A1/fr
Publication of WO1995034740A1 publication Critical patent/WO1995034740A1/fr

Links

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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • 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
    • E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives

Definitions

  • a disadvantage of this kind of known drilling appa ⁇ ratus are the tandem percussion shoulders made in the pilot bit, the areas of which remain small due to structural reasons.
  • One shoulder hits the ring bit and another hits the protective tube.
  • the protective tube advances easily, for instance in drilling into rock, the ring bit is mainly hit by the shoulder, whereat the small shoulder area becomes damaged, eventually.
  • the ring drill bit In drilling into soft soil, the ring drill bit must be hit hardly at all and the percussions are even directed over another shoulder to hammer the protective tube, in this case needs the most of the impact energy. Further, when the area of this shoulder is small too, the shoulder or its counterface in the protective tube becomes damaged and wears out easily.
  • the ring bit remains in its position with respect to the protective tube even after detachment of the pilot bit. It can neither turn crosswise nor escape, whereat the pilot bit, when it is being re-installed into drilling position, hits the inside of the ring bit using only slightly bevelled guides. With a construction according to this invention sufficient ring bit areas are achieved in regard to the thickness of the ring bit.
  • the ring bit is hammered from its rear end, whereat the percussion impulse advances straight forward in the bit. When the hammer gear hammers the protective tube forward indirect ⁇ ly only over the bit, the stroke is suppressed a little and does not exert maximum force on the protective tube front edge even though there would be no significant counter-face to take the hit of that stroke.
  • the protective tube is a thin wall construction and its front edge is under hard stress and can therefore tear under the force of the strokes.
  • a thin ring bit construction has been achieved and does not cause any great costs if left in the deep borehole
  • Fig. 1 is a partial cross-section of the drilling apparatus.
  • Fig. 2 is an end view of the drilling apparatus.
  • Fig. 1 is a cross-section of another drilling apparatus.
  • Figure 1 shows the end of the drilling apparatus comprising a pilot bit 2 and a ring bit 5 outside of it.
  • the hammer gear rod 1 which is hit by the hammer gear piston, has a thread onto which the pilot bit is screwed.
  • a nore simple con ⁇ struction can be used also, whereat the rod and pilot bit are made of the same billet, i.e. one piece.
  • Compressed air enters rod 1 and is conducted through holes 11 in bit 2 to the front side of this bit.
  • In the outer edge of the pilot ring there are grooves 6, over which drill waste is transferred to the rear.
  • bit 2 there can be channels 22 even closer to the center running backward through the bit reducing unnecessary rambling of drill waste on bit front side and between bit and the surface being drilled.
  • a groove 8 parallel with the peripherie runs a certain distance out of each groove 6.
  • pins fixed to ring bit 5 and by means of this bayonet connection bits 2 and 5 are interlocked by screwing.
  • Over this bayonet connection ring bit 5 is rotated by bit 2 on drilling in the used direction of rotation.
  • Pins 21 of the ring bit are in groove 8 ends.
  • the pins extrude from grooves 8 into channels 6, whereat the pilot bit can move backward while the ring bit remains in its position.
  • the pins of ring bit 5 are loose in regard to grooves 8 so that the strokes do not get transferred over pins 21 to the ring bit but allow an axial movement as big as the clearance between bits 2 and 5.
  • Figure 2 shows the front of the drill head, whereby holes 11 transmitting compressed air to the front of the drill bit, channels 10 arranged radially for compressed air in the bit front face and channels 6 arranged in the backward direction for drill waste and compressed air can be seen. Further, four grooves 8 are illustrated by a dash line which are on the periphery of pilot bit 2.
  • the front faces of both drill bits 2,5 are furnished with possibly exchangeable working pins 9. Whether the thickness allows, there can also be in the ring bit channels, for instance grooves or holes directed to the rear of the bits.
  • Figure 3 shows another embodiment of the drill bit assembly.
  • a shoulder 18 is connected to pilot bit 20 hitting both the shoulder face 17 of protecting tube 4 and the ring bit 14.
  • Pilot bit 20 has brackets 19 with matching grooves in the ring bit. After detachment of the pilot bit, the ring bit is held in place for instance by a thick cord in groove 15 extruding from one or several holes 16. The ring bit can move axially a distance allowed by the width of groove 15. Also in this case the stroke is suppressed in bit 20 which only in the second stage is hammering the protective tube 4 forward while reducing its liability to damage. Drill waste and compressed air travel through bit 20 along channel 22.
  • both detaching and re- installation of the pilot bit is reliable, since possible rotation of the ring bit does not disturb locking or de- tachment.
  • the rotation of ring bit 5 may disturb detachment and locking if it can rotate easily on the edge of protective tube 3.
  • the periphery of the ring bit When the ring bit is dead and protected in protective tube 3,4 and only a part of its periphery is outside the protective tube while being, simultaneously, controlled and supported by the front edge of the protective tube, the periphery of the ring bit does not touch the tunnel bottom and is not then, due to its rotation, striving to change the direction of its forward travel during drilling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Appareil de forage pour forer des trous dans le sol ou la roche dont l'ensemble fleuret de travail comporte un trépan annulaire (5) forant la périphérie du trou, et un trépan pilote (2) attaquant le centre du trou. Ces deux éléments peuvent être séparés l'un de l'autre, et lors du forage, peuvent être verrouillés de sorte qu'ils tournent ensemble au moins dans un sens et puissent se déplacer axialement l'un par rapport à l'autre sur des guides (19) ou des rainures (8). Le dispositif de martelage est placé directement derrière l'ensemble fleuret, le trépan pilote (2) étant relié à la tige (1) du dispositif de martelage et les guides/rainures (8) de guidage étant disposés entre le trépan pilote (2) et le trépan annulaire (5).
PCT/FI1994/000249 1994-06-10 1994-06-10 Appareil de forage WO1995034740A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI1994/000249 WO1995034740A1 (fr) 1994-06-10 1994-06-10 Appareil de forage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI1994/000249 WO1995034740A1 (fr) 1994-06-10 1994-06-10 Appareil de forage

Publications (1)

Publication Number Publication Date
WO1995034740A1 true WO1995034740A1 (fr) 1995-12-21

Family

ID=8556582

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1994/000249 WO1995034740A1 (fr) 1994-06-10 1994-06-10 Appareil de forage

Country Status (1)

Country Link
WO (1) WO1995034740A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998020229A1 (fr) * 1996-11-08 1998-05-14 Sandvik Ab (Publ) Procede et appareil permettant d'attacher un tubage a un trepan dans un equipement de forage de morts-terrains
WO2000031373A1 (fr) * 1998-11-23 2000-06-02 Ilomaeki Valto Procede de montage d'un sabot de tubage sur un appareil de forage
WO2001071152A1 (fr) * 2000-03-21 2001-09-27 Dht Technologies Limited Segment utilise pour un foret de sondeuse a carrotes et procede de fabrication
AT408567B (de) * 1998-03-06 2002-01-25 Techmo Entw & Vertriebs Gmbh Vorrichtung zum bohren von bohrlöchern
WO2010043757A1 (fr) * 2008-10-13 2010-04-22 Oy Atlas Copco Rotex Ab Procédé et appareil de forage pour forage en fond de trou
EP2339109A2 (fr) 2009-12-23 2011-06-29 Lövab Aktiebolag Outil et procédé de forage du sol
WO2012049353A1 (fr) * 2010-10-15 2012-04-19 Robit Rocktools Ltd Ensemble foret
EP2499325A1 (fr) * 2009-11-09 2012-09-19 OY Atlas Copco Rotex AB Procédé de raccordement d'un tube de cuvelage à un trépan
WO2015059341A1 (fr) 2013-10-22 2015-04-30 Tri-Mach Oy Dispositif de forage
EP2198110A4 (fr) * 2007-07-10 2015-12-23 Robit Rocktools Ltd Ensemble foret
WO2016183645A1 (fr) * 2015-05-15 2016-11-24 Dos Santos Márcio Procédé et dispositif pour le traitement de tunnels au moyen de d'enfilages tubulaires avec auto-revêtement et auto-injection
WO2019073123A1 (fr) * 2017-10-13 2019-04-18 Mincon Nordic Oy Agencement et procédé d'installation de tubage
US10563462B2 (en) 2015-09-14 2020-02-18 Mincon Nordic Oy Drilling device
EP4022159A4 (fr) * 2019-08-26 2023-06-14 Mincon Nordic Oy Unité de forage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE223486C1 (fr) * 1968-11-19
US3635295A (en) * 1969-12-02 1972-01-18 Fenix & Scisson Inc Apparatus for drilling a small borehole downwardly from the bottom of a large borehole
DE4225701C1 (de) * 1992-08-04 1993-12-23 Peter Rubak Erdbohrgerät

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE223486C1 (fr) * 1968-11-19
US3635295A (en) * 1969-12-02 1972-01-18 Fenix & Scisson Inc Apparatus for drilling a small borehole downwardly from the bottom of a large borehole
DE4225701C1 (de) * 1992-08-04 1993-12-23 Peter Rubak Erdbohrgerät

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1080813C (zh) * 1996-11-08 2002-03-13 桑德维克公司 用于钻进上覆岩层的钻井装置、套管鞋及套管鞋的安装方法
WO1998020229A1 (fr) * 1996-11-08 1998-05-14 Sandvik Ab (Publ) Procede et appareil permettant d'attacher un tubage a un trepan dans un equipement de forage de morts-terrains
AT408567B (de) * 1998-03-06 2002-01-25 Techmo Entw & Vertriebs Gmbh Vorrichtung zum bohren von bohrlöchern
WO2000031373A1 (fr) * 1998-11-23 2000-06-02 Ilomaeki Valto Procede de montage d'un sabot de tubage sur un appareil de forage
WO2001071152A1 (fr) * 2000-03-21 2001-09-27 Dht Technologies Limited Segment utilise pour un foret de sondeuse a carrotes et procede de fabrication
EP2198110A4 (fr) * 2007-07-10 2015-12-23 Robit Rocktools Ltd Ensemble foret
WO2010043757A1 (fr) * 2008-10-13 2010-04-22 Oy Atlas Copco Rotex Ab Procédé et appareil de forage pour forage en fond de trou
EP2499325A1 (fr) * 2009-11-09 2012-09-19 OY Atlas Copco Rotex AB Procédé de raccordement d'un tube de cuvelage à un trépan
EP2499325A4 (fr) * 2009-11-09 2017-03-29 OY Atlas Copco Rotex AB Procédé de raccordement d'un tube de cuvelage à un trépan
EP2339109A2 (fr) 2009-12-23 2011-06-29 Lövab Aktiebolag Outil et procédé de forage du sol
EP2627851A4 (fr) * 2010-10-15 2017-12-27 Robit Rocktools LTD. Ensemble foret
CN103261558A (zh) * 2010-10-15 2013-08-21 机器人凿岩钻具有限责任公司 钻孔机
WO2012049353A1 (fr) * 2010-10-15 2012-04-19 Robit Rocktools Ltd Ensemble foret
WO2015059341A1 (fr) 2013-10-22 2015-04-30 Tri-Mach Oy Dispositif de forage
EP3060742A4 (fr) * 2013-10-22 2017-06-14 Tri-Mach Oy Dispositif de forage
WO2016183645A1 (fr) * 2015-05-15 2016-11-24 Dos Santos Márcio Procédé et dispositif pour le traitement de tunnels au moyen de d'enfilages tubulaires avec auto-revêtement et auto-injection
US10563462B2 (en) 2015-09-14 2020-02-18 Mincon Nordic Oy Drilling device
WO2019073123A1 (fr) * 2017-10-13 2019-04-18 Mincon Nordic Oy Agencement et procédé d'installation de tubage
EP4022159A4 (fr) * 2019-08-26 2023-06-14 Mincon Nordic Oy Unité de forage
US11959337B2 (en) 2019-08-26 2024-04-16 Mincon Nordic Oy Drilling unit

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