EP1144797B1 - A method for mounting a casing shoe on a drilling apparatus - Google Patents

A method for mounting a casing shoe on a drilling apparatus Download PDF

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Publication number
EP1144797B1
EP1144797B1 EP98955619A EP98955619A EP1144797B1 EP 1144797 B1 EP1144797 B1 EP 1144797B1 EP 98955619 A EP98955619 A EP 98955619A EP 98955619 A EP98955619 A EP 98955619A EP 1144797 B1 EP1144797 B1 EP 1144797B1
Authority
EP
European Patent Office
Prior art keywords
shoe
drilling apparatus
groove
shrunk
shoulder
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.)
Expired - Lifetime
Application number
EP98955619A
Other languages
German (de)
French (fr)
Other versions
EP1144797A1 (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
Atlas Copco Rotex Oy AB
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
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Application filed by Atlas Copco Rotex Oy AB filed Critical Atlas Copco Rotex Oy AB
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
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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
    • 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.
  • 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.
  • a revolving-nut tubular connector which is particularly meant for coupling of flexible hoses and the like.
  • This connector is formed of a nipple fitting with a shoulder for the abutment of the ring for locking the flexible hose on said nipple.
  • the connector has a conventional revolving nut for locking the sealing head of the nipple body on the end of the tube or nozzle of a user device.
  • Said nut has, in a rearward position, on annular rim or lip that protrudes coaxially from the threaded cavity and has such dimensions as to allow its insertion on the nipple and its subsequent partial deformation by pressing, after fitting on the tubular nipple body, so as to reduce its diameter and thus create a mechanical retention element that acts as a spacer between the nut and said shoulder of the nipple.
  • the above connector is thus meant for coupling of flexible hoses, and so, making axially locked couplings by this kind of connectors does not give any advice in practice for the kind of mounting methods needed for coupling of drilling parts of a drilling head with each other.
  • 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.
  • Figure 1 is a drilling apparatus furnished with a transverse groove 9, into which the shoulder 8 of the 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 the drilling apparatus 2, so that the shoe could advance in the drilled bore-hole.
  • 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 a joint 7 can be both fitted in and taken off the groove 9.
  • a Tool 5 is a shrinking tool comprised of a conical portion 6 that causes the shrinking of the shoe.
  • a rammer 1 By means of a rammer 1, the drilling apparatus and the shoe are pressed, as shown in Figure 1; into the tool 5 till shoe 4 is essentially in the cylindrical portion Ds of the tool.
  • the the shoe is shrunk to a diameter of size Ds, fitted to be distinctively smaller than a diameter Du, which is the diameter of the drilling apparatus and also the borehole diameter.
  • shrinking can be carried out by pushing the drilling apparatus 2 downwards, whereby, in spite of its bigger diameter, the drilling apparatus does not yet reach the conical surface 6 of the tool 5, even though the shoe 4 has not fully passed the conical surface. Pushing can be stopped at this point and the shoe and the drilling apparatus can be pushed back from the tool. Shoe 4 has thus become formed through shrinking to its diameter size Ds and axially locked by means of the shoulder 8 into the groove 9, and so the joint is ready.
  • the shoe shrinkage is produced by a tool that is dimensioned so that after shrinking there will remain a clear sliding fit between the shoe an the drilling apparatus.
  • the sliding fit allows mutual rotation and axial motion between the shoe and the drilling apparatus.
  • the shoulder 8 is locked axially in the groove 9 to endure loads caused by pulling the casing.
  • Figure 4 shows the shrinking of the shoe 4 by multi-jaw squeezing with the shoe in proper position around the drilling apparatus.
  • the Shoulder 8 takes thus its place in the groove 9.
  • the shoe is shrunk approx. 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. Shrinking of the shoe elsewhere is then not necessary.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Description

The invention relates to the mounting of a casing shoe around a cylindrical drilling apparatus.
Previously known, among other things, from Finish patent specification 86571 or WO 96 04456, 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.
On the other hand, from European Patent Application 0 685 677 a revolving-nut tubular connector is known, which is particularly meant for coupling of flexible hoses and the like. This connector is formed of a nipple fitting with a shoulder for the abutment of the ring for locking the flexible hose on said nipple. The connector has a conventional revolving nut for locking the sealing head of the nipple body on the end of the tube or nozzle of a user device. Said nut has, in a rearward position, on annular rim or lip that protrudes coaxially from the threaded cavity and has such dimensions as to allow its insertion on the nipple and its subsequent partial deformation by pressing, after fitting on the tubular nipple body, so as to reduce its diameter and thus create a mechanical retention element that acts as a spacer between the nut and said shoulder of the nipple.
The above connector is thus meant for coupling of flexible hoses, and so, making axially locked couplings by this kind of connectors does not give any advice in practice for the kind of mounting methods needed for coupling of drilling parts of a drilling head with each other.
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 the 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 the drilling apparatus 2, so that the shoe could advance in the drilled bore-hole. 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 the groove 9 of the drilling apparatus 2, a two-piece ring as per figure 3 is placed, which by means of a joint 7 can be both fitted in and taken off the groove 9.
    A Tool 5, as shown in Figures 1 and 2, is a shrinking tool comprised of a conical portion 6 that causes the shrinking of the shoe. By means of a rammer 1, the drilling apparatus and the shoe are pressed, as shown in Figure 1; into the tool 5 till shoe 4 is essentially in the cylindrical portion Ds of the tool. The the shoe is shrunk to a diameter of size Ds, fitted to be distinctively smaller than a diameter Du, which is the diameter of the drilling apparatus and also the borehole diameter. When in a ring 3 is used the groove 9, as can be seen from figure 2, shrinking can be carried out by pushing the drilling apparatus 2 downwards, whereby, in spite of its bigger diameter, the drilling apparatus does not yet reach the conical surface 6 of the tool 5, even though the shoe 4 has not fully passed the conical surface. Pushing can be stopped at this point and the shoe and the drilling apparatus can be pushed back from the tool. Shoe 4 has thus become formed through shrinking to its diameter size Ds and axially locked by means of the shoulder 8 into the groove 9, and so the joint is ready.
    The shoe shrinkage is produced by a tool that is dimensioned so that after shrinking there will remain a clear sliding fit between the shoe an the drilling apparatus. The sliding fit allows mutual rotation and axial motion between the shoe and the drilling apparatus. However, by means of the solution, the shoulder 8 is locked axially in the groove 9 to endure loads caused by pulling the casing.
    Figure 4 shows the shrinking of the shoe 4 by multi-jaw squeezing with the shoe in proper position around the drilling apparatus. The Shoulder 8 takes thus its place in the groove 9.
    The shoe is shrunk approx. 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. Shrinking of the shoe elsewhere is then not necessary.

    Claims (6)

    1. A method for mounting a casing shoe (4) around a cylindrical drilling apparatus (2), whereby the shoe (4) and the drilling apparatus (2) are in an installed position able to rotate with respect to one another and move a certain distance axially with respect to one another, when a shoulder (8) in the shoe is in a transverse groove (9) on the periphery of the drilling apparatus, the groove determining the length of the free mutual axial motion of the coupled parts (4, 2), characterized in that the cylindrical shoe (4) is being shrunk around the drilling apparatus (2) until the outer diameter of the shoe (4) becomes smaller than the outer diameter (Du) of the drilling apparatus (2) and the shoulder (8) in the shoe (4) gets locked axially in the groove (9).
    2. A method according to claim 1, characterized in that the shoe (4) including the shoulder (8) retain their shape during shrinking.
    3. A method according to claim 1 and 2, characterized in that the shoe (4) is shrunk by means of several clamping jaws (10) formed to correspond to the shoe's (4) outer surface.
    4. A method according to claim 1 and 2, characterized in that the shoe (4) is shrunk by 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, a detachable ring assembly (3) is placed into the groove (9), which assembly steers the shoe shoulder (8) to become shrunk in the backmost edge of groove (9) with respect to the drilling direction.
    6. A method according to claims 4 and 5, characterized in that, while using the ring assembly (3), the drilling apparatus (2) with the shoe (4) is pushed into the conical tool (5) until the size of the shoe is shrunk to the desired diameter.
    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 EP1144797A1 (en) 2001-10-17
    EP1144797B1 true 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)

    Families Citing this family (2)

    * 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
    FI10639U1 (en) * 2013-07-26 2014-10-09 Atlas Copco Rotex Ab Oy Uppoporauslaitteisto

    Family Cites Families (28)

    * 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
    GB1111593A (en) 1964-09-25 1968-05-01 Nat Res Dev Improvements in or relating to the securing of sleeves in cylinder bores
    AT282258B (en) 1968-02-08 1970-06-25 Wizemann & Co J Push rod
    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
    NL175040C (en) 1974-08-19 1984-09-17 Durofac Kartro As DRILL RECEIVER FOR AN IMPACT DRILL.
    US4157122A (en) 1977-06-22 1979-06-05 Morris William A Rotary earth boring drill and method of assembly thereof
    ZA8400569B (en) 1981-08-24 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
    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
    FR2553690B1 (en) 1983-10-21 1986-09-12 Cegedur METHOD OF ASSEMBLING A THIN TUBE INTO A PLATE OR SLEEVE
    SE501988C2 (en) * 1989-04-05 1995-07-10 Uniroc Ab Drilling tools for drilling in soil and covered rock
    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
    FR2687594B1 (en) 1992-02-25 1994-04-08 Gec Alsthom Sa METHOD FOR FIXING A STOPPER ON A TUBE AND TUBE PROVIDED WITH A STOPPER PERFORMED ACCORDING TO THE METHOD.
    SE9200563L (en) 1992-02-25 1993-07-26 Oesten Edman SETTING TO EXERCISE DRILLING IN EARTH STORES AND SHOOTING BEFORE SETTING
    FR2708055B1 (en) 1993-07-19 1995-08-25 Inst Francais Du Petrole Connection device for composite rod.
    US5441121A (en) 1993-12-22 1995-08-15 Baker Hughes, Inc. Earth boring drill bit with shell supporting an external drilling surface
    SE9401349D0 (en) 1994-04-21 1994-04-21 Atlas Copco Rocktech Ab Lining tube with impact shoe
    IT233462Y1 (en) 1994-06-02 2000-01-28 Hydrofit Spa PERFECTED SWIVEL NUT TUBULAR FITTING, PARTICULARLY FOR HYDRAULIC AND SIMILAR FLEXIBLE HOSES
    WO1995034740A1 (en) * 1994-06-10 1995-12-21 Ilomaeki Valto Drilling apparatus
    FI98400C (en) * 1994-08-03 1997-06-10 Valto Ilomaeki drill Rig
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    Also Published As

    Publication number Publication date
    EP1144797A1 (en) 2001-10-17
    DE69831021T2 (en) 2006-04-20
    US20020033078A1 (en) 2002-03-21
    DE69831021D1 (en) 2005-09-01
    WO2000031373A1 (en) 2000-06-02

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