EP2198110B1 - Bit assembly - Google Patents

Bit assembly Download PDF

Info

Publication number
EP2198110B1
EP2198110B1 EP08787686.8A EP08787686A EP2198110B1 EP 2198110 B1 EP2198110 B1 EP 2198110B1 EP 08787686 A EP08787686 A EP 08787686A EP 2198110 B1 EP2198110 B1 EP 2198110B1
Authority
EP
European Patent Office
Prior art keywords
bit
ring
pilot
extension
casing tube
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.)
Not-in-force
Application number
EP08787686.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2198110A1 (en
EP2198110A4 (en
Inventor
Mikko Mattila
Pekka Salmi
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.)
Robit PLC
Original Assignee
Robit PLC
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 Robit PLC filed Critical Robit PLC
Publication of EP2198110A1 publication Critical patent/EP2198110A1/en
Publication of EP2198110A4 publication Critical patent/EP2198110A4/en
Application granted granted Critical
Publication of EP2198110B1 publication Critical patent/EP2198110B1/en
Not-in-force legal-status Critical Current
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
    • 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
    • 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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • 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

Definitions

  • the invention relates to a bit assembly in a drilling apparatus said apparatus working by hammering and/or rotating said assembly comprising of a pilot bit, drilling the central part of the hole and a ring bit fitted in connection with the said pilot bit and furnished with cylindrical inner surface drilling the outer surface of said hole, and further, between the pilot bit and the ring bit a blocking arrangement of mutual rotation and axial movement, whereby opening of said blocking arrangement makes it possible to pull the pilot bit off the hole, while the ring bit remains in the hole, and the bit assembly comprises a casing tube and its extension, and an interlocking system which is through a ring-shaped device from the extension of the casing tube adapted to transfer pulling force from the pilot or ring bit to the casing tube extension, and said interlocking system can be opened in order to continue drilling with the ring and pilot bits, when the casing tube remains in its place.
  • a similar drilling apparatus comprising a pilot bit and a ring bit is known from WO95/34740 .
  • a new bit assembly is developed, characteristic of which is that a ring like device comprises parts directed to the inside, by means of which said device is permissively fitted to rotate into the traverse groove on the outer surface of either the pilot or ring bit so that its motion is limited or blocked in both axial directions.
  • the advantage of the invention is that the casing tube, which during drilling is pulled into the hole can be left in the hole in the place wanted, for instance on hitting the rock, without pulling the drilling apparatus occasionally from the hole.
  • the pilot and also ring bits continue drilling without the casing tube therewith the diameter of the drilled hole remains unchanged.
  • the ring bit which is often to be left in a finished hole, can for its part be made material saving, since the pulling system that pulls the casing tube into the hole comes in this solution around the pilot bit.
  • the casing tube is pulled by means of the pilot bit and not the ring bit the hammering surfaces between pilot and ring bits can be remarkably smaller in regard to former solutions, whereby the wall thickness of the pilot bit in its cylindrical portion can also be made smaller.
  • the hammering faces between the ring like device according to the invention and the casing tube extension are easily made bigger, which extends the durability of the pilot bit.
  • the ring like device can advantageously be locked on the pilot bit outer surface so that by locking at least apart of the flushing grooves or of the ring bit grooves on the pilot bit outer surface are utilized. This is possible, since according to the invention, the ring like device comprises on its inner surface elevating parts directed to the inside.
  • the figure 1 shows a pilot bit 1, comprising of a stem 13, a percussion face 14 furnished with bit buttons and a cylindrical portion 16, which has longitudinal grooves, such as flushing grooves 12 and grooves 17 lower than former ones intended for locking as well as transverse grooves 10 for locking.
  • the front edge of the cylindrical portion 16 is as to its diameter a smaller cylindrical portion.
  • the drill waste flushing grooves 12 are deeper than the longitudinal ones on the pilot bit surface.
  • Figure 2 shows a ring bit 2 put in place around pilot bit 1.
  • the parts like locking claws 7 and 15 are locking said bits 1 and 2 mutual unrotatable in one rotation direction and additionally mutual immovable in both axial directions.
  • Figure 3 shows the ring like device 8 that transmits percussion or pulling force to the casing tube and is installed around the pilot bit 1.
  • the pilot bit longitudinal low grooves 17 as well as from them outgoing transverse grooves 10.
  • On the inner surface of device belongs from the inner surface projecting parts 9, which are fitted to run in said longitudinal grooves 17 and further when hitting traverse grooves 10, so that device 8 adheres like a bayonet coupling around the pilot bit 1.
  • the device becomes also detachable from above the pilot bit 1.
  • Figure 4 shows a section view of a casing extension 6 which is to be welded in the end of the casing tube, which is fixed around the ring like device, for instance by shrinking, whereby the shrinking joint is left loose so that mutual rotation is possible for the parts. However, they will in axial directions be locked to each other, but for them a small mutual clearance 5 - 10 mm in the axial direction is remained.
  • the casing tube is not shown, but it is by a known way, for instance, fixed by welding fixed to the extension 6.
  • Figure 5 shows the loose components according to the invented structure.
  • the inner projecting parts 9 of the ring like device 8 there are grooves 10 on the cylindrical portion of the pilot bit 1, into which grooves the parts 9 can screwed by a small rotary motion of one of them.
  • the pilot bit 1 can also be threaded through the device 8 in both directions.
  • the ring bit 2 must always be left in the ending hole, if even the casing tube, inclusive its extension 6, is left in the hole.

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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP08787686.8A 2007-07-10 2008-07-10 Bit assembly Not-in-force EP2198110B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20070540A FI20070540A0 (fi) 2007-07-10 2007-07-10 Teräsovitelma
PCT/FI2008/000087 WO2009007494A1 (en) 2007-07-10 2008-07-10 Bit assembly

Publications (3)

Publication Number Publication Date
EP2198110A1 EP2198110A1 (en) 2010-06-23
EP2198110A4 EP2198110A4 (en) 2015-12-23
EP2198110B1 true EP2198110B1 (en) 2017-02-15

Family

ID=38331557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08787686.8A Not-in-force EP2198110B1 (en) 2007-07-10 2008-07-10 Bit assembly

Country Status (9)

Country Link
US (1) US20100200303A1 (ja)
EP (1) EP2198110B1 (ja)
JP (1) JP5443349B2 (ja)
KR (1) KR101678358B1 (ja)
BR (1) BRPI0814214A2 (ja)
CA (1) CA2693781A1 (ja)
ES (1) ES2625464T3 (ja)
FI (1) FI20070540A0 (ja)
WO (1) WO2009007494A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI125204B (fi) * 2010-10-15 2015-06-30 Robit Rocktools Ltd Porasovitelma
FI10639U1 (fi) 2013-07-26 2014-10-09 Atlas Copco Rotex Ab Oy Uppoporauslaitteisto
CN104453707A (zh) * 2014-12-15 2015-03-25 中煤科工集团西安研究院有限公司 矿山事故井下大直径水平救援的钻孔成孔装置及成孔方法
CN106285529B (zh) * 2015-05-11 2019-04-05 中国石油化工股份有限公司 一种丢手装置
FI20165116L (fi) * 2016-02-17 2017-08-18 Geonex Oy Poralaitteisto
KR20200032727A (ko) * 2017-07-24 2020-03-26 룩 찰랜드 드릴링 시스템 및 이를 이용한 방법
JP7433026B2 (ja) 2019-11-25 2024-02-19 芝浦機械株式会社 成形ロールの温度制御装置

Family Cites Families (13)

* 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
JP2997998B2 (ja) * 1995-10-23 2000-01-11 ヤマモトロックマシン株式会社 ケーシング掘ビット
FI98649C (fi) * 1995-11-06 1997-07-25 Valto Ilomaeki Menetelmä reiän poraamiseksi ja sovitelma menetelmän toteuttamiseksi
SE512383C3 (sv) * 1997-08-08 2000-04-03 Sandvik Ab Borrverktyg foer att borra ett haal framfoer ett foderroer rymmarorgan och baselement foer anvaendning i borrverktyget
EP1144797B1 (en) * 1998-11-23 2005-07-27 Oy Atlas Copco Rotex Ab A method for mounting a casing shoe on a drilling apparatus
JP2000204870A (ja) * 1999-01-19 2000-07-25 Kfc Ltd 削孔装置
JP3750516B2 (ja) * 2000-04-25 2006-03-01 三菱マテリアル株式会社 掘削工具
JP3755124B2 (ja) * 2000-10-30 2006-03-15 株式会社間組 削孔ビット
SE522135C2 (sv) * 2001-07-02 2004-01-13 Uno Loef Borrverktyg för sänkborrning
FI115661B (fi) * 2002-12-23 2005-06-15 Robit Rocktools Ltd Teräsovitelma
JP4001346B2 (ja) * 2004-10-05 2007-10-31 鹿島建設株式会社 削孔装置
JP2006291660A (ja) * 2005-04-14 2006-10-26 Okabe Co Ltd 二重管削孔装置及び小口径二重管削孔装置を用いたアンカー材設置方法

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP2198110A1 (en) 2010-06-23
CA2693781A1 (en) 2009-01-15
FI20070540A0 (fi) 2007-07-10
KR101678358B1 (ko) 2016-11-23
US20100200303A1 (en) 2010-08-12
JP5443349B2 (ja) 2014-03-19
JP2010533250A (ja) 2010-10-21
BRPI0814214A2 (pt) 2015-01-27
KR20100043222A (ko) 2010-04-28
ES2625464T3 (es) 2017-07-19
WO2009007494A1 (en) 2009-01-15
EP2198110A4 (en) 2015-12-23

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