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US20140144710A1 - Drill Assembly - Google Patents

Drill Assembly Download PDF

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Publication number
US20140144710A1
US20140144710A1 US13/879,413 US201113879413A US2014144710A1 US 20140144710 A1 US20140144710 A1 US 20140144710A1 US 201113879413 A US201113879413 A US 201113879413A US 2014144710 A1 US2014144710 A1 US 2014144710A1
Authority
US
United States
Prior art keywords
bit
ring
ring bit
pilot
forms
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.)
Abandoned
Application number
US13/879,413
Other languages
English (en)
Inventor
Mikko Mattila
Pasi Korte
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 Rocktools Ltd 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 Robit Rocktools Ltd Oy filed Critical Robit Rocktools Ltd Oy
Assigned to ROBIT ROCKTOOLS LTD reassignment ROBIT ROCKTOOLS LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KORTE, PASI, MATTILA, MIKKO
Publication of US20140144710A1 publication Critical patent/US20140144710A1/en
Abandoned 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B10/265—Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the hole
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B17/0465—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 characterised by radially inserted locking elements
    • 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
    • E21B17/14—Casing shoes for the protection of the bottom of the casing
    • 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
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • 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

Definitions

  • Invention relates to a drill assembly for making a hole into a soil or rock which assembly comprises a pilot bit drilling the middle part of the hole and a ring bit drilling the outer circle of the hole in which case in the drilling situation the ring bit is adjusted around the pilot bit and rotary movement and drilling impacts are directed from the pilot bit to the ring bit with the help of the mentioned surfaces adjusted between the bits and conveying the impacts and that the ring bit can be removed around the pilot bit and can be installed to it and that further a coupling ring which can be locked to the ring bit belongs around the ring bit in order to join a casing pipe, which is to be pulled into the drilled hole, to the ring bit through the mentioned coupling ring.
  • a drill assembly according to the above mentioned preamble is previously known for example from the publication WO 2004/057148 in which the shown ring bit is relatively long in the axial direction because the upper part of the ring bit comprises first a flange part comprising spikes made of for example hard metal. After the flange part there is a a casing part to which a groove has first been formed and after that locking hole formations with the help of which the ring bit is locked to the pilot bit. Also a cutter shoe is relatively long in the axial direction when the cutter shoe is adjusted to exceed essentially in the axial direction both the groove and the locking hole forms located at the casing part of the ring bit. Also the body of the pilot bit is long in the axial direction and the length required by the counter forms adjusted to the locking hole forms of the ring bit is only a small part of it, less than a quarter.
  • the coupling ring is adjusted around the periphery of the ring bit in such a way that of the parts taking part in the reciprocal locking of the coupling ring and the ring bit at least two are located at different sides of the line L when the arrangement is assembled which line runs essentially through the middle point of the surface conveying the rotation of the ring bit.
  • the advantage of the invention is the fact that the size of the ring bit becomes essentially shorter in the axial direction thanks to the new locating and installation way of the coupling ring. Similarly the length needed for the coupling ring becomes shorter.
  • the thickness of the cylinder part of the ring bit must however be of a certain size due to hard metal installations in which case the thickness of the cylinder part allows the formation of grooves at the outer surface of the ring bit for the attachment of the coupling ring. In some cases even one groove is enough for the coupling ring but two or even several grooves still do not increase too much the length of the coupling ring.
  • the coupling ring is installed most advantageously by shrinking or welding on top of the ring bit.
  • FIG. 1 shows a ring bit according to the invention and a coupling ring as a cut view.
  • FIG. 2 shows the position of a coupling ring in relation to the ring bit.
  • FIG. 3 shows a pilot bit as a side view.
  • FIG. 4 shows the grooves of a bayonet locking formed to the ring bit.
  • FIG. 1 there is a ring bit 1 which has a cylindrical body.
  • the front part of the body comprises a flange part 14 forming an extension which flange part has a length h 2 in the axial direction and to which flange part hard metal spikes 13 are attached.
  • the cylinder part directed in the back from the flange part 14 comprises two grooves 12 at its outer surface to which grooves a coupling ring 2 is attached in such a way that ring overhangs 13 of the inner surface of the coupling ring are located into the mentioned grooves 12 .
  • the cylinder part of the ring bit 1 also has hole forms in order to lock it to the counter forms of the pilot bit in such a known way.
  • the hole forms comprise surfaces conveying impacts in the axial direction, such as surfaces 4 and 6 and surfaces 5 conveying rotation.
  • the surface 4 has lift, especially a surface with a constant lift.
  • This cylinder part located behind the flange part 14 of the ring bit 1 comprises essentially only counter forms 12 for the ring overhangs of the coupling ring 2 and counter forms 4 - 6 ; 5 ; 16 ; 17 of the locking forms 7 - 9 of the pilot bit 10 .
  • the above mentioned hole forms 4 - 6 are located at the same place at the cylinder part of the ring bit 1 as the coupling ring 2 .
  • the coupling ring 2 has a length hl in the axial direction.
  • the hole forms 4 - 6 require length from the cylinder part essentially the same amount than the coupling ring 2 does.
  • the ring bit 1 will thus have a short construction in the axial direction.
  • the hole forms 4 - 6 go through the cylinder part of the ring bit. Due to this the grooves 12 in the ring bit are not necessarily continuous grooves around the cylinder part.
  • a pilot bit 10 which has locking hole forms 7 - 9 in a such known way as a counter form to the hole forms of the ring bit 1 .
  • FIG. 4 a hole form for the bayonet locking is shown in the ring bit.
  • a vertical groove 18 at the inner surface of the ring bit 1 and at the end of it there is a horizontal part 17 .
  • a protruding piece, for example quadrangular, located at the side of the pilot bit moves in this solution first to the end of a vertical groove 18 in a such known way and with a reversion of the pilot bit moves against the surface 5 located at the end of a horizontal groove 17 and functions as the part which conveys the rotation of the pilot bit to the ring bit.
  • this piece can convey impacts to the ring bit in its locking position by conveying impacts onto the surface 16 of the ring bit 1 .
  • the depths of the grooves 17 and 18 are less than the wall thickness of the ring bit 1 .

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)
US13/879,413 2010-10-15 2011-10-14 Drill Assembly Abandoned US20140144710A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20100349A FI125204B (fi) 2010-10-15 2010-10-15 Porasovitelma
FI20100349 2010-10-15
PCT/FI2011/000042 WO2012049353A1 (en) 2010-10-15 2011-10-14 Drill assembly

Publications (1)

Publication Number Publication Date
US20140144710A1 true US20140144710A1 (en) 2014-05-29

Family

ID=43064168

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/879,413 Abandoned US20140144710A1 (en) 2010-10-15 2011-10-14 Drill Assembly

Country Status (7)

Country Link
US (1) US20140144710A1 (fi)
EP (1) EP2627851A4 (fi)
KR (1) KR20140032347A (fi)
CN (1) CN103261558A (fi)
FI (1) FI125204B (fi)
RU (1) RU2585779C2 (fi)
WO (1) WO2012049353A1 (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016183645A1 (pt) * 2015-05-15 2016-11-24 Dos Santos Márcio Processo e dispositivo para tratamento de túneis através de enfilagens tubulares auto-revestidas e auto-injetáveis

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3011127B1 (en) * 2013-07-26 2022-01-19 TerraRoc Finland Oy Method in putting together of a down-the-hole drilling apparatus and a down-the-hole drilling apparatus
CN108166480A (zh) * 2016-12-08 2018-06-15 金门机械设备有限公司 连续互扣式管桩墙或围堰施工方法
JP6366028B1 (ja) * 2017-12-25 2018-08-01 青葉建機株式会社 掘削装置及びその組立方法
CN113914769B (zh) * 2021-10-14 2024-08-16 周拯 一种轴冲带动扭转的钻井提速工具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590726A (en) * 1992-12-03 1997-01-07 Jarvela; Jorma Drilling apparatus
US7347291B2 (en) * 2002-12-23 2008-03-25 Robit Rocktools Ltd Bit assembly

Family Cites Families (8)

* 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
FI980426L (fi) * 1994-12-13 1998-02-25 Valto Ilomaeki Teräasetelma
WO1998013575A1 (en) * 1996-09-25 1998-04-02 Ilomaeki Valto 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
AUPR886401A0 (en) * 2001-11-14 2001-12-06 Cmte Development Limited Fluid drilling head
RU2338051C1 (ru) * 2007-04-16 2008-11-10 Институт горного дела Сибирского отделения Российской академии наук Способ бурения скважин с одновременной обсадкой и устройство для его осуществления
FI20070540A0 (fi) * 2007-07-10 2007-07-10 Robit Rocktools Ltd Teräsovitelma
FI20095046A0 (fi) * 2009-01-21 2009-01-21 Atlas Copco Rotex Ab Oy Menetelmä ja laitteisto uppoporaukseen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590726A (en) * 1992-12-03 1997-01-07 Jarvela; Jorma Drilling apparatus
US7347291B2 (en) * 2002-12-23 2008-03-25 Robit Rocktools Ltd Bit assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016183645A1 (pt) * 2015-05-15 2016-11-24 Dos Santos Márcio Processo e dispositivo para tratamento de túneis através de enfilagens tubulares auto-revestidas e auto-injetáveis

Also Published As

Publication number Publication date
EP2627851A1 (en) 2013-08-21
FI20100349A7 (fi) 2012-04-16
KR20140032347A (ko) 2014-03-14
WO2012049353A1 (en) 2012-04-19
FI20100349A0 (fi) 2010-10-15
CN103261558A (zh) 2013-08-21
RU2013122095A (ru) 2014-11-20
EP2627851A4 (en) 2017-12-27
RU2585779C2 (ru) 2016-06-10
FI125204B (fi) 2015-06-30
FI20100349L (fi) 2012-04-16

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBIT ROCKTOOLS LTD, FINLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MATTILA, MIKKO;KORTE, PASI;REEL/FRAME:030351/0656

Effective date: 20130429

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION