EP3060742B1 - Bohrvorrichtung - Google Patents

Bohrvorrichtung Download PDF

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Publication number
EP3060742B1
EP3060742B1 EP13895833.5A EP13895833A EP3060742B1 EP 3060742 B1 EP3060742 B1 EP 3060742B1 EP 13895833 A EP13895833 A EP 13895833A EP 3060742 B1 EP3060742 B1 EP 3060742B1
Authority
EP
European Patent Office
Prior art keywords
drilling
pilot bit
bit
groove
drilling device
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.)
Active
Application number
EP13895833.5A
Other languages
English (en)
French (fr)
Other versions
EP3060742A4 (de
EP3060742A1 (de
Inventor
Hannu Paasonen
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.)
Tri-Mach Oy
Original Assignee
Tri-Mach Oy
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 Tri-Mach Oy filed Critical Tri-Mach Oy
Publication of EP3060742A1 publication Critical patent/EP3060742A1/de
Publication of EP3060742A4 publication Critical patent/EP3060742A4/de
Application granted granted Critical
Publication of EP3060742B1 publication Critical patent/EP3060742B1/de
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Anticipated expiration legal-status Critical

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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
    • 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
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
    • 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

  • the invention relates to a drilling device which comprises a pilot bit drilling a middle portion of a hole, to said bit detachable fastened ring bit said bit drilling outer circle of the hole, as well as an arrangement for pulling a casing tube into said hole during drilling, wherein in the drilling situation both the pilot bit and the ring bit are fitted to be rotated and the casing tube fitted to be unrotatable, and for removing drilling waste from drilled surface locating at front side of said bits, the drilling device comprises a flushing system, by means of which flushing medium is lead via the pilot bit to the drilling surface and returned therefrom into a flow space locating inside the casing tube.
  • Document WO 02/081856 A1 discloses a method for drilling and a drilling apparatus.
  • Document DE 299 12 404 U1 discloses a drilling device.
  • Document WO 00/11304 A1 discloses a reverse circulation drilling system with bit locked underreamer arms.
  • Document FR 2 889 556 A1 discloses a well drilling device for measuring parameter e.g. pressure at ground level, has fluid injecting unit constituted of pipe mounted in cooperation with drilling tool so that pressurized fluid output openings are situated at level of tool.
  • Document WO 95/34740 A1 discloses a drilling apparatus.
  • Document WO 98/20229 A1 discloses a Method and apparatus for attaching a casing to a drill bit in overburden drilling equipment.
  • Characteristics for the drilling device according to the invention is that the flushing medium flow has been by means of a channel system turned inside the pilot bit to a flow which is flowing in side direction, arranged to run a portion a inside the pilot bit in the said side direction before the flow will run in the groove on the surface of the pilot bit, which groove is open towards the drilled surface.
  • Characteristics for the pilot bit belonging to the drilling device according to the invention is that the pilot bit is designed to function by means of rotation motion and edges locating in the drilling surface and directed towards the rotation direction as a cutting edge which cuts the drilled surface during earth boring, wherein said edges are arranged to meet the drilled surface essentially first.
  • pressurized flushing flow does not hit the drilled surface but flows in horizontal direction towards the inner surface of the ring bit, wherein its effect upon the drilled surface is essentially weakened.
  • Drilling waste can, however, in same way as in known solutions flow with the flushing medium and together go away inside the casing tube.
  • soil drilling grooves have been formed in the pilot bit and cutting edges in their back portions seen in the rotation direction of the bit, wherein soil loosened by said edges moves into said groove and further therefrom into the flushing channels. Soil is not uncontrolled loosened from the area outside the hole.
  • FIG 1 there is as bits for the drilling device a pilot bit 1 which drills center part of a hole middle and a ring bit 2 which drills the outer circle of the hole and is detachable, like via bayonet coupling fastened to the pilot bit.
  • Casing tube 4 is pulled into the hole during drilling by means of the pilot bit 1, which bit is hammering to a ring-like casing shoe 3.
  • the casing shoe 3 has been welded to the casing tube 4 and therefore the casing shoe finally pulls the casing tube 4 into the hole.
  • Flushing medium like pressurized air, is lead via center hole 8 in the pilot bit 1 towards the top of the pilot bit 1, but this channel ends a little before the front surface of the pilot bit 1.
  • This solution has, however, very small hole 9 drilled through.
  • the hole 9 is not necessary for the invention at all and can be left undrilled.
  • the hole has for example thread, wherein a lift hook can be fastened to said hole, when the bit is handled.
  • Nearly whole flushing flow is turned in the pilot bit 1 according to the invention to horizontal direction and continues in a round channel 6 in side direction.
  • the channel 6 is opened after a distance being open of its upper portion, wherein drilling waste can move from the drilled surface and to join to flushing medium.
  • the flushing medium jet is not in any stage directed towards the drilled surface towards the drilled soil.
  • 6 in the pilot bit 1 is a hole 6 from its first portion as long as the flushing medium jet will get motion in horizontal direction.
  • the distance is for example about 2 - 3 times the diameter of the hole 6. If it is drilled soft soil, at least the flushing medium jet does not loosen too much soil with it, because the jet hits mainly to the inner surface of the ring bit 2, from where the jet continues via the channel 7 back inside the casing tube 4.
  • Figure 2 shows a drilling device seen from front and section view of the flushing groove 5, 6 from line A - A.
  • the flushing groove which comes via center hole 8 in the pilot bit 1 is divided in this drilling device into five horizontal directed holes 6 and grooves 5, 6 which are following said holes.
  • the hole 6 is forming the bottom part of the groove along the whole portion in the pilot bit 1, but the hole changes to a groove which is open upwards due to another groove 5 which has been machined above it.
  • the groove 5 has been made widening when it continues towards the outer edge of the pilot bit 1. This helps access of the flushing medium into the groove 5, 6 because there is also more produced waste in front of the pilot bit 1 when going towards its outer edge.
  • a pilot bit 1 whose drilling surface comprises only two grooves 5 and two into horizontal direction turned flushing groove 6.
  • the grooves 5 are wide and especially in soil drilling they receive soil which has loosened from the drilled surface. Soil can be loosened from the drilled surface when cutting edges 11 have been formed in the pilot bit 1 in the rear edge of the grooves 5.
  • the edges 11 are cutting the drilled surface when the pilot bit 1 rotates though they locates in the same level with the drilling surface in the pilot bit 1, because there is also advance motion for the bits 1, 2 towards the drilled surface.
  • the cutting edges 11 can be in the drilling surface a little lifted up, as section A - A shows, when the drilling surface has been made slanted surface in angle ⁇ so, that edge 11 cuts the drilled surface also with a little advance motion.
  • Angle ⁇ is advantageous little for example 5 - 15 °.

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)

Claims (8)

  1. Bohrvorrichtung, die einen Pilotbohrer (1) zum Bohren eines mittleren Abschnitts eines Lochs und, an diesem Bohrer (1) lösbar befestigt, einen Ringbohrer (2) umfasst, wobei der Ringbohrer den äußeren Kreis des Lochs bohrt, sowie eine Anordnung zum Ziehen eines Mantelrohres in das Loch während des Bohrens, wobei in der Bohrsituation sowohl der Pilotbohrer (1) als auch der Ringbohrer (2) dazu eingerichtet sind, gedreht zu werden, und das Mantelrohr (4) dazu eingerichtet ist, undrehbar zu sein, und zum Entfernen von Bohrabfall von einer Bohrfläche, die sich an einer Vorderseite der Bohrer (1, 2) befindet, wobei die Bohrvorrichtung ein Spülsystem umfasst, mithilfe dessen ein Spülmedium über den Pilotbohrer (1) zu der Bohrfläche geleitet und von dort in einen Durchflussraum (7) zurückgeführt wird, der sich in dem Mantelrohr (4) befindet,
    dadurch gekennzeichnet, dass das Spülsystem ein Kanalsystem umfassend einen axialen Kanal (8) und, in einer radial äußeren Richtung, ein Loch (6) mit einer Länge umfasst, um für das Spülmedium eine Bewegung in der radial äußeren Richtung zu ermöglichen und das der Länge nach eine offene Seite in Richtung der Bohrfläche aufweist, so dass eine Nut (5, 6) entsteht, wodurch der Strom des Spülmediums mithilfe des Kanalsystems (8, 6) in dem Pilotbohrer (1) zu einer Strömung geführt wird, die in der radial äußeren Richtung fließt, und dazu eingerichtet ist, einen Abschnitt (a) in dem Pilotbohrer (1) in der radialen und äußeren Richtung zu entlang fließen, bevor die Strömung in der Nut (5, 6) auf der Oberfläche des Pilotbohrers (1) fließt, wobei diese Nut in Richtung der Bohrfläche offen ist.
  2. Bohrvorrichtung nach Anspruch 1, dadurch gekennzeichnet, das die Nut (5, 6), die sich auf der Oberfläche des Pilotbohrers (1) befindet, in Richtung des Ringbohrers (2) zu einem Kanal (7) gerichtet ist, der von der Bohrfläche nach hinten führt.
  3. Bohrvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass zumindest ein Boden der Nut (5, 6) einen runden Querschnitt aufweist.
  4. Bohrvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das Loch (6) in dem Pilotbohrer (1) einen runden Querschnitt aufweist.
  5. Bohrvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Nut (5, 6), die sich auf der Oberfläche des Pilotbohrers (1) befindet, dazu ausgelegt ist, mithilfe einer Drehbewegung zu funktionieren und Kanten (11), die sich in der Bohrfläche befinden und in Richtung der Drehrichtung ausgerichtet sind, als Schneidkante dienen, welche die Bohrfläche während der Erdbohrung schneiden, wobei die Kanten (11) dazu ausgelegt sind, im Wesentlichen zuerst auf die Bohrfläche zu treffen.
  6. Bohrvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Bohrfläche des Pilotbohrers (1) die Nuten (5) vor den Schneidkanten (11) umfasst, betrachtet in der Drehrichtung, wobei die Nuten (5) gelöstes Material aufnehmen und Teil einer Anordnung sind, durch welche geschnittenes, von der Bohrfläche gelöstes oder durch Schneiden gelöstes Material durch die Spülkanäle (7) nach hinten geleitet wird.
  7. Bohrvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Bohrfläche des Pilotbohrers (1) dazu eingerichtet ist, eine winklig geneigte (α) Fläche zu sein, so dass sich eine Kante (11) in der Bohrsituation ganz vorne an der Bohrfläche befindet.
  8. Bohrvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass in der Bohrfläche des Pilotbohrers (1) die Nut (5) vor der Schneidkante (11) angeordnet ist, wobei die Vorschubbewegung, die auf den Pilotbohrer (1) übertragen wird, und die Drehung des Bohrers die Kante (11) zu der Oberfläche bewegen.
EP13895833.5A 2013-10-22 2013-10-22 Bohrvorrichtung Active EP3060742B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2013/000041 WO2015059341A1 (en) 2013-10-22 2013-10-22 Drilling device

Publications (3)

Publication Number Publication Date
EP3060742A1 EP3060742A1 (de) 2016-08-31
EP3060742A4 EP3060742A4 (de) 2017-06-14
EP3060742B1 true EP3060742B1 (de) 2019-01-30

Family

ID=52992319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13895833.5A Active EP3060742B1 (de) 2013-10-22 2013-10-22 Bohrvorrichtung

Country Status (2)

Country Link
EP (1) EP3060742B1 (de)
WO (1) WO2015059341A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102143681B1 (ko) 2015-02-13 2020-08-12 테라록 핀랜드 오와이 다운더홀 굴착 장치
CA2987794C (en) 2015-06-24 2023-08-08 Epiroc Canada Inc. Core barrel head assembly with safety overshot
EP3433463B1 (de) * 2016-03-22 2020-07-01 TerraRoc Finland Oy Abwärtsbohrvorrichtung
CN107448142B (zh) * 2017-09-25 2023-06-20 湖北五环欧科制造技术有限公司 一种带去应力部卡环

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995034740A1 (en) * 1994-06-10 1995-12-21 Ilomaeki Valto Drilling apparatus
FI96356C (fi) 1994-12-13 1999-12-18 Valto Ilomaeki Porausmenetelmä ja teräasetelma menetelmän toteuttamiseksi
GB9502378D0 (en) * 1995-02-07 1995-03-29 Astec Dev Ltd Lateral jetting
US6209665B1 (en) * 1996-07-01 2001-04-03 Ardis L. Holte Reverse circulation drilling system with bit locked underreamer arms
AU4387597A (en) 1996-09-25 1998-04-17 Valto Ilomaki Bit assembly
US5839519A (en) * 1996-11-08 1998-11-24 Sandvik Ab Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment
DE29912404U1 (de) * 1999-07-15 1999-09-09 Herrenknecht Ag Bohrvorrichtung
FI20010699A0 (fi) * 2001-04-04 2001-04-04 Jorma Jaervelae Menetelmä poraukseen ja porauslaitteisto
FR2889556B1 (fr) * 2005-08-04 2007-09-21 Gerard Arsonnet Dispositif de forage d'un puits suivant un axe de forage pour mesurer un parametre d'une partie d'un sol
SE533272C2 (sv) * 2008-12-18 2010-08-03 Sandvik Intellectual Property Borrverktyg för slående bergborrning samt förbrukningskit, ringborrkrona och slagsko härför

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2015059341A1 (en) 2015-04-30
EP3060742A4 (de) 2017-06-14
EP3060742A1 (de) 2016-08-31

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