EP1144797A1 - A method for mounting a casing shoe on a drilling apparatus - Google Patents

A method for mounting a casing shoe on a drilling apparatus

Info

Publication number
EP1144797A1
EP1144797A1 EP98955619A EP98955619A EP1144797A1 EP 1144797 A1 EP1144797 A1 EP 1144797A1 EP 98955619 A EP98955619 A EP 98955619A EP 98955619 A EP98955619 A EP 98955619A EP 1144797 A1 EP1144797 A1 EP 1144797A1
Authority
EP
European Patent Office
Prior art keywords
shoe
drilling apparatus
drilling
groove
shrunk
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
EP98955619A
Other languages
German (de)
French (fr)
Other versions
EP1144797B1 (en
Inventor
Valto ILOMÄKI
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.)
Tercope Finland Oy
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8556733&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1144797(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP1144797A1 publication Critical patent/EP1144797A1/en
Application granted granted Critical
Publication of EP1144797B1 publication Critical patent/EP1144797B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming

Definitions

  • the invention relates to the mounting of a casing shoe around a cylindrical drilling apparatus, which shoe is used by drilling and pulled into the ground on drilling.
  • Previously known, among other things, from Finish patent specification 86571 is a casing shoe around a cylindrical drill where on the drill periphery there is a grooving, in which the welded ring of the casing shoe is installed.
  • the drill can rotate with respect to the ring and also move axially determined by the groove.
  • the ring is formed of two halves by welding in the groove as a complete ring, further the ring is welded on the casing or the shoe .
  • the ring to be fitted in the groove must be of made two halves so that it can be installed in the groove, or the whole shoe must be cleaved longitudinally as equal halves and welded together around the drilling apparatus in order to produce a- shoulder to restrict axial motions.
  • the shoe has no welds, since the shoulder in the shoe, is produced by turning or shaping.
  • the method solves all problems and the method is characterized in what is presented in the patent claims.
  • Fig. 1 shows the shoe to be pushed into the tool, and the drilling apparatus
  • Fig. 2 shows the shoe shrunk in the tool around the drilling apparatus .
  • Fig. 3 shows the openable ring utilized for mounting.
  • Fig. 4 shows shrinking of shoe by means of clamp jaws.
  • Figure 1 is a drilling apparatus furnished with a transverse groove 9, into which the shoulder 8 of shoe 4 is to be fitted. Further, the whole shoe 4 should be shrunk to a diameter size distinctively smaller than the outer diameter size Du of drilling apparatus 2 so that the shoe could advance in the drilled borehole.
  • the casing to be pulled into the borehole is welded as a butted joint or a lap joint in the rear edge of the shoe.
  • the shoe is turned to such a diameter that it can be slid into a position around the drilling apparatus as shown in figure 1.
  • a two-piece ring as per figure 3 is placed, which by means of joint 7 can be both fitted in and taken off groove 9.
  • Tool 5 is a shrinking tool comprised of a conical portion 6 that causes the shrinking of the shoe.
  • the drilling apparatus and the shoe are pressed into tool 5 till shoe 4 is fully in the cylindrical portion Ds of the tool.
  • the shoe is shrunk to a diameter size of Ds, fitted to be distinctively smaller than Du, which is the diameter size of the drilling apparatus and also the borehole diameter.
  • Du which is the diameter size of the drilling apparatus and also the borehole diameter.
  • shrinking can be carried out by pushing drilling apparatus 2 and, in spite of its bigger diameter the drilling apparatus does not yet reach the conical surface 6 of tool 5, even though shoe 4 has not fully passed the conical surface. Pushing can be stopped at this point and the shoe and drilling apparatus pushed back from the tool.
  • Shoe 4 has then become formed through shrinking to its diameter size Ds and locked by means of shoulder 8 into groove 9, and the joint is ready.
  • the shoe shrinkage is produced by a tool and the tool dimensioned so that after shrinking there will remain between shoe a clear sliding fit.
  • the sliding fit allows mutual rotation and axial motion between shoe and drilling apparatus.
  • the shoulder 8 is locked in groove 9 to endure loads caused by pulling the casing.
  • Figure 4 shows the shrinking of shoe 4 by multi-jaw squeezing with the shoe in proper position around the drilling apparatus. Shoulder 8 takes then its place in groove 9.
  • the shoe is shrunk ab. 2 to 8 % of the diameter in the embodiment, where the shoe retains it form during shrinking. Usually, the shoe is then shrunk all over. If the shoe is formed beforehand to a smaller diameter as to its rear edge, the shoe is shrunk at least on the portion, where the shoulder is formed. Shoe shrinking elsewhere is then not necessary.

Abstract

A method for mounting a casing shoe (4) around a cylindrical drilling apparatus (2), which shoe is used by drilling and pulled into the ground on drilling, whereby shoe (4) and drilling apparatus (2) can in the installed position rotate with respect to one another and move a certain distance axially with respect to one another, when shoulder (8) in the shoe is in transverse groove (9) on the periphery of the drilling apparatus and the groove is determining the length of the axial motion. The cylindrical shoe (2) is shrunk in order to make its diameter smaller around a spot in drilling apparatus (2) smaller than the outer diameter (Du), until through shrinking the outer diameter of the shoe has become smaller than the outer diameter (Du) of the drilling apparatus.

Description

A METHOD FOR MOUNTING A CASING SHOE ON A DRILLING APPATATUS
The invention relates to the mounting of a casing shoe around a cylindrical drilling apparatus, which shoe is used by drilling and pulled into the ground on drilling.
Previously known, among other things, from Finish patent specification 86571 is a casing shoe around a cylindrical drill where on the drill periphery there is a grooving, in which the welded ring of the casing shoe is installed. The drill can rotate with respect to the ring and also move axially determined by the groove. The ring is formed of two halves by welding in the groove as a complete ring, further the ring is welded on the casing or the shoe .
The ring to be fitted in the groove must be of made two halves so that it can be installed in the groove, or the whole shoe must be cleaved longitudinally as equal halves and welded together around the drilling apparatus in order to produce a- shoulder to restrict axial motions.
The solutions are complicated, since a part of the welds must be done in joints in a narrow space, the welds twist the shoe construction and the welded joint is not dependable by heavy loading. In percussive drilling apparatuses the shoe is for fatigue loading.
By means of the method according to the invention the shoe has no welds, since the shoulder in the shoe, is produced by turning or shaping. The method solves all problems and the method is characterized in what is presented in the patent claims.
The advantage of the invention is a fast and dependable assembly resulting in a circular shoe. Deformations due to welding are avoided and since the shoulder is produced by turning, it can be made to match exactly the counterface in the groove in the drilling apparatus. In the following the invention is disclosed with reference to the enclosed drawings, where
Fig. 1 shows the shoe to be pushed into the tool, and the drilling apparatus
Fig. 2 shows the shoe shrunk in the tool around the drilling apparatus . Fig. 3 shows the openable ring utilized for mounting. Fig. 4 shows shrinking of shoe by means of clamp jaws.
Figure 1 is a drilling apparatus furnished with a transverse groove 9, into which the shoulder 8 of shoe 4 is to be fitted. Further, the whole shoe 4 should be shrunk to a diameter size distinctively smaller than the outer diameter size Du of drilling apparatus 2 so that the shoe could advance in the drilled borehole. The casing to be pulled into the borehole is welded as a butted joint or a lap joint in the rear edge of the shoe.
The shoe is turned to such a diameter that it can be slid into a position around the drilling apparatus as shown in figure 1. In addition, in groove 9 of drilling apparatus 2 a two-piece ring as per figure 3 is placed, which by means of joint 7 can be both fitted in and taken off groove 9.
Tool 5 is a shrinking tool comprised of a conical portion 6 that causes the shrinking of the shoe. By means of rammer 1 the drilling apparatus and the shoe are pressed into tool 5 till shoe 4 is fully in the cylindrical portion Ds of the tool. The shoe is shrunk to a diameter size of Ds, fitted to be distinctively smaller than Du, which is the diameter size of the drilling apparatus and also the borehole diameter. When in groove 9 the ring 3 is used, it can be seen from figure 2 that shrinking can be carried out by pushing drilling apparatus 2 and, in spite of its bigger diameter the drilling apparatus does not yet reach the conical surface 6 of tool 5, even though shoe 4 has not fully passed the conical surface. Pushing can be stopped at this point and the shoe and drilling apparatus pushed back from the tool. Shoe 4 has then become formed through shrinking to its diameter size Ds and locked by means of shoulder 8 into groove 9, and the joint is ready.
The shoe shrinkage is produced by a tool and the tool dimensioned so that after shrinking there will remain between shoe a clear sliding fit. The sliding fit allows mutual rotation and axial motion between shoe and drilling apparatus. However, by means of the solution the shoulder 8 is locked in groove 9 to endure loads caused by pulling the casing.
Figure 4 shows the shrinking of shoe 4 by multi-jaw squeezing with the shoe in proper position around the drilling apparatus. Shoulder 8 takes then its place in groove 9.
The shoe is shrunk ab. 2 to 8 % of the diameter in the embodiment, where the shoe retains it form during shrinking. Usually, the shoe is then shrunk all over. If the shoe is formed beforehand to a smaller diameter as to its rear edge, the shoe is shrunk at least on the portion, where the shoulder is formed. Shoe shrinking elsewhere is then not necessary.

Claims

1. A method for mounting a casing shoe (4) around a cylindrical drilling apparatus (2), which shoe is used by drilling and pulled into the ground on drilling, whereby shoe (4) and drilling apparatus (2) can in the installed position rotate with respect to one another and move a certain distance axially with respect to one another, when shoulder (8) in the shoe is in transverse groove (9) on the periphery of the drilling apparatus and the groove determing the length of the axial motion, c h a r a c t er i z e d in that at least a part of cylindrical shoe (2) is shrunk in order to make its diameter smaller around a spot in the drilling apparatus smaller than the outer diameter (Du) of drilling apparatus (2) on which there is the transverse groove
(9), until the outer diameter of the shoe has through shrinking become smaller than the outer diameter (Du) of the drilling apparatus and/or the formed shoulder is in groove (9) .
2. A method according to claim 1 c h a r a c t e r i z e d in that shoe (4) including shoulder (8) retain their shape during shrinking.
3. A method according to claim 1 and 2 c h a r a c t e r i z e d in that shoe (4) is shrunk by means of many clamping jaws (10) formed to correspond to the shoe (4) outer surface.
4. A method according to claim 1 and 2 c h a r a c t e r i z e d in that the shoe is shrunk in forcing the shoe into a tool (5) that has a diminishing conical portion (6) .
5. A method according to any of the previous claims 1 - 4 c h a r a c t e r i z e d in that in order to carry out the shrinking stage, into groove (9) a detachable ring assembly (3) is placed, which steers the shoe (4) shoulder (8) to become shrunk in the backmost edge of groove (9) with respect to the drilling direction.
6. A method according to claim 5 c h a r a c t e r i z e d in that on using the ring assembly (3) the drilling apparatus with shoe (4) is pushed into conical tool (5) until the shoe size is shrunk to the diameter size needed.
EP98955619A 1998-11-23 1998-11-23 A method for mounting a casing shoe on a drilling apparatus Expired - Lifetime EP1144797B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI1998/000913 WO2000031373A1 (en) 1998-11-23 1998-11-23 A method for mounting a casing shoe on a drilling apparatus

Publications (2)

Publication Number Publication Date
EP1144797A1 true EP1144797A1 (en) 2001-10-17
EP1144797B1 EP1144797B1 (en) 2005-07-27

Family

ID=8556733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98955619A Expired - Lifetime EP1144797B1 (en) 1998-11-23 1998-11-23 A method for mounting a casing shoe on a drilling apparatus

Country Status (4)

Country Link
US (1) US20020033078A1 (en)
EP (1) EP1144797B1 (en)
DE (1) DE69831021T2 (en)
WO (1) WO2000031373A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015011336A1 (en) 2013-07-26 2015-01-29 Oy Atlas Copco Rotex Ab Method in putting together of a down-the-hole drilling apparatus and a down-the-hole drilling apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20070540A0 (en) * 2007-07-10 2007-07-10 Robit Rocktools Ltd cutting arrangement

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB813301A (en) 1956-06-29 1959-05-13 Schoeller Bleckmann Stahlwerke A drill pipe joint, particularly between drill stems
GB857630A (en) 1958-02-26 1961-01-04 American Iron & Machine Works Pipe connection
GB860768A (en) 1958-04-04 1961-02-08 Electrochimie Electrometallurg Improvements in or relating to a method of manufacturing rock and like drills and tosuch drills
US3372452A (en) 1964-09-25 1968-03-12 Mini Of Technology Securing of sleeves in cylinder bores
DE1800600A1 (en) 1968-02-08 1969-08-28 Wizemann & Co J Pushrod
DE2133525A1 (en) 1971-07-06 1973-01-25 Kloeckner Humboldt Deutz Ag PROCESS FOR PRODUCING A CONNECTING THREAD ON PIPE ENDS
US3792603A (en) 1972-07-26 1974-02-19 Glaenzer Spicer Sa Apparatus for assembling two parts into interlocked and interfitting relationship
GB1518950A (en) 1974-08-19 1978-07-26 Reinholdt As H Drilling device
US4157122A (en) 1977-06-22 1979-06-05 Morris William A Rotary earth boring drill and method of assembly thereof
US4453854A (en) 1983-02-22 1984-06-12 Fansteel Inc. Unitized drill steel and method of manufacturing
US4498691A (en) 1981-08-24 1985-02-12 Stratoflex, Inc. Hose fitting and method of assembly
EP0143062A1 (en) 1983-10-21 1985-05-29 Cegedur Societe De Transformation De L'aluminium Pechiney Method of mounting a thin tube in a tube plate or in a sleeve
EP0126698B1 (en) 1983-04-20 1986-11-12 Cegedur Societe De Transformation De L'aluminium Pechiney Method of affixing an annular member on an aluminium tube or the like
WO1990012237A1 (en) 1989-04-10 1990-10-18 Raychem Corporation Method of applying axial force between two objects
US5150636A (en) 1991-06-28 1992-09-29 Loudon Enterprises, Inc. Rock drill bit and method of making same
EP0558399A1 (en) 1992-02-25 1993-09-01 Gec Alsthom T & D Sa Method of fixing or plug in a tube and tube with a plug made by this method
WO1993017215A1 (en) 1992-02-25 1993-09-02 Edman Knut Oesten Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes
GB2280237A (en) 1993-07-19 1995-01-25 Inst Francais Du Petrole Connector for composite pipes
WO1995029321A1 (en) 1994-04-21 1995-11-02 Atlas Copco Craelius Ab Casing tube with casing shoe
EP0685677A1 (en) 1994-06-02 1995-12-06 HYDROFIT S.p.A. Improved revolving-nut tubular connector, particularly for flexible oleodynamic hoses and the like
WO1996028635A1 (en) 1995-03-11 1996-09-19 Enterprise Oil Plc Improved casing shoe
US5666864A (en) 1993-12-22 1997-09-16 Tibbitts; Gordon A. Earth boring drill bit with shell supporting an external drilling surface
US5685057A (en) 1995-05-01 1997-11-11 Cbc Industries, Inc. Drill bushing assembly and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501988C2 (en) * 1989-04-05 1995-07-10 Uniroc Ab Drilling tools for drilling in soil and covered rock
WO1995034740A1 (en) * 1994-06-10 1995-12-21 Ilomaeki Valto Drilling apparatus
FI98400C (en) * 1994-08-03 1997-06-10 Valto Ilomaeki drill Rig
FI945367A (en) * 1994-11-14 1996-05-15 Valto Ilomaeki Cutting arrangement for drilling device and method for removing drilling waste
FI96356C (en) * 1994-12-13 1999-12-18 Valto Ilomaeki Drilling method and blade assembly to implement the method

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB813301A (en) 1956-06-29 1959-05-13 Schoeller Bleckmann Stahlwerke A drill pipe joint, particularly between drill stems
GB857630A (en) 1958-02-26 1961-01-04 American Iron & Machine Works Pipe connection
GB860768A (en) 1958-04-04 1961-02-08 Electrochimie Electrometallurg Improvements in or relating to a method of manufacturing rock and like drills and tosuch drills
US3372452A (en) 1964-09-25 1968-03-12 Mini Of Technology Securing of sleeves in cylinder bores
DE1800600A1 (en) 1968-02-08 1969-08-28 Wizemann & Co J Pushrod
DE2133525A1 (en) 1971-07-06 1973-01-25 Kloeckner Humboldt Deutz Ag PROCESS FOR PRODUCING A CONNECTING THREAD ON PIPE ENDS
US3792603A (en) 1972-07-26 1974-02-19 Glaenzer Spicer Sa Apparatus for assembling two parts into interlocked and interfitting relationship
GB1518950A (en) 1974-08-19 1978-07-26 Reinholdt As H Drilling device
US4157122A (en) 1977-06-22 1979-06-05 Morris William A Rotary earth boring drill and method of assembly thereof
US4498691A (en) 1981-08-24 1985-02-12 Stratoflex, Inc. Hose fitting and method of assembly
US4453854A (en) 1983-02-22 1984-06-12 Fansteel Inc. Unitized drill steel and method of manufacturing
EP0126698B1 (en) 1983-04-20 1986-11-12 Cegedur Societe De Transformation De L'aluminium Pechiney Method of affixing an annular member on an aluminium tube or the like
US4627149A (en) 1983-04-20 1986-12-09 Cegedur Societe De Transformation De L'aluminium Pechiney Method of mounting an annular element on a metal tube of aluminum or an alloy thereof
EP0143062A1 (en) 1983-10-21 1985-05-29 Cegedur Societe De Transformation De L'aluminium Pechiney Method of mounting a thin tube in a tube plate or in a sleeve
WO1990012237A1 (en) 1989-04-10 1990-10-18 Raychem Corporation Method of applying axial force between two objects
US5150636A (en) 1991-06-28 1992-09-29 Loudon Enterprises, Inc. Rock drill bit and method of making same
EP0558399A1 (en) 1992-02-25 1993-09-01 Gec Alsthom T & D Sa Method of fixing or plug in a tube and tube with a plug made by this method
WO1993017215A1 (en) 1992-02-25 1993-09-02 Edman Knut Oesten Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes
GB2280237A (en) 1993-07-19 1995-01-25 Inst Francais Du Petrole Connector for composite pipes
US5666864A (en) 1993-12-22 1997-09-16 Tibbitts; Gordon A. Earth boring drill bit with shell supporting an external drilling surface
WO1995029321A1 (en) 1994-04-21 1995-11-02 Atlas Copco Craelius Ab Casing tube with casing shoe
EP0685677A1 (en) 1994-06-02 1995-12-06 HYDROFIT S.p.A. Improved revolving-nut tubular connector, particularly for flexible oleodynamic hoses and the like
WO1996028635A1 (en) 1995-03-11 1996-09-19 Enterprise Oil Plc Improved casing shoe
US5685057A (en) 1995-05-01 1997-11-11 Cbc Industries, Inc. Drill bushing assembly and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015011336A1 (en) 2013-07-26 2015-01-29 Oy Atlas Copco Rotex Ab Method in putting together of a down-the-hole drilling apparatus and a down-the-hole drilling apparatus
EP3011127A4 (en) * 2013-07-26 2017-03-08 OY Atlas Copco Rotex AB Method in putting together of a down-the-hole drilling apparatus and a down-the-hole drilling apparatus
US9970238B2 (en) 2013-07-26 2018-05-15 Oy Atlas Copco Rotex Ab Method in putting together of a down-the-hole drilling apparatus and a down-the-hole drilling apparatus

Also Published As

Publication number Publication date
WO2000031373A1 (en) 2000-06-02
DE69831021D1 (en) 2005-09-01
DE69831021T2 (en) 2006-04-20
US20020033078A1 (en) 2002-03-21
EP1144797B1 (en) 2005-07-27

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