US20020033078A1 - Method for mounting a casing shoe on a drilling appatatus - Google Patents

Method for mounting a casing shoe on a drilling appatatus Download PDF

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Publication number
US20020033078A1
US20020033078A1 US09/863,000 US86300001A US2002033078A1 US 20020033078 A1 US20020033078 A1 US 20020033078A1 US 86300001 A US86300001 A US 86300001A US 2002033078 A1 US2002033078 A1 US 2002033078A1
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US
United States
Prior art keywords
shoe
drilling apparatus
drilling
groove
shrunk
Prior art date
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Abandoned
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US09/863,000
Inventor
Valto Ilomaki
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Publication of US20020033078A1 publication Critical patent/US20020033078A1/en
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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

Abstract

A method for mounting a casing shoe (4) around a cylindrical drilling apparatus (2), which shoe is used by drilling and pulled in 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

  • 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. [0001]
  • 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. [0002]
  • 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. [0003]
  • 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. [0004]
  • 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. [0005]
  • 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. [0006]
  • In the following the invention is disclosed with reference to the enclosed drawings, where [0007]
  • FIG. 1 shows the shoe to be pushed into the tool, and the drilling apparatus [0008]
  • FIG. 2 shows the shoe shrunk in the tool around the drilling apparatus. [0009]
  • FIG. 3 shows the openable ring utilized for mounting. [0010]
  • FIG. 4 shows shrinking of shoe by means of clamp jaws.[0011]
  • FIG. 1 is a drilling apparatus furnished with a [0012] 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 FIG. 1. In addition, in [0013] groove 9 of drilling apparatus 2 a two-piece ring as per FIG. 3 is placed, which by means of joint 7 can be both fitted in and taken off groove 9.
  • [0014] 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 FIG. 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 [0015] shoulder 8 is locked in groove 9 to endure loads caused by pulling the casing.
  • FIG. 4 shows the shrinking of [0016] 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. [0017]

Claims (6)

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, characterized 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 characterized in that shoe (4) including shoulder (8) retain their shape during shrinking.
3. A method according to claim 1 and 2 characterized 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 characterized 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 characterized 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 characterized 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.
US09/863,000 1998-11-23 2001-05-23 Method for mounting a casing shoe on a drilling appatatus Abandoned US20020033078A1 (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

Related Parent Applications (1)

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

Publications (1)

Publication Number Publication Date
US20020033078A1 true US20020033078A1 (en) 2002-03-21

Family

ID=8556733

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/863,000 Abandoned US20020033078A1 (en) 1998-11-23 2001-05-23 Method for mounting a casing shoe on a drilling appatatus

Country Status (4)

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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
US20100200303A1 (en) * 2007-07-10 2010-08-12 Mikko Mattila Bit assembly

Families Citing this family (1)

* 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

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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
GB1111593A (en) 1964-09-25 1968-05-01 Nat Res Dev Improvements in or relating to the securing of sleeves in cylinder bores
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US4157122A (en) 1977-06-22 1979-06-05 Morris William A Rotary earth boring drill and method of assembly thereof
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US4453854A (en) 1983-02-22 1984-06-12 Fansteel Inc. Unitized drill steel and method of manufacturing
FR2544645B1 (en) 1983-04-20 1986-05-30 Cegedur METHOD OF ASSEMBLING AN ANNULAR ELEMENT ON A METAL ALUMINUM TUBE OR ONE OF ITS ALLOYS
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100200303A1 (en) * 2007-07-10 2010-08-12 Mikko Mattila Bit assembly

Also Published As

Publication number Publication date
DE69831021D1 (en) 2005-09-01
DE69831021T2 (en) 2006-04-20
WO2000031373A1 (en) 2000-06-02
EP1144797B1 (en) 2005-07-27
EP1144797A1 (en) 2001-10-17

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