EP2050922B1 - Gewinde für Dreh-Schlag-Bohrrohr - Google Patents

Gewinde für Dreh-Schlag-Bohrrohr Download PDF

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Publication number
EP2050922B1
EP2050922B1 EP08166631.5A EP08166631A EP2050922B1 EP 2050922 B1 EP2050922 B1 EP 2050922B1 EP 08166631 A EP08166631 A EP 08166631A EP 2050922 B1 EP2050922 B1 EP 2050922B1
Authority
EP
European Patent Office
Prior art keywords
pipe
couplings
tubular portion
thread
roto
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.)
Active
Application number
EP08166631.5A
Other languages
English (en)
French (fr)
Other versions
EP2050922A3 (de
EP2050922A2 (de
Inventor
Jamie Thompson
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.)
Roggan Investments Ltd
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Roggan Investments Ltd
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Publication date
Application filed by Roggan Investments Ltd filed Critical Roggan Investments Ltd
Publication of EP2050922A2 publication Critical patent/EP2050922A2/de
Publication of EP2050922A3 publication Critical patent/EP2050922A3/de
Application granted granted Critical
Publication of EP2050922B1 publication Critical patent/EP2050922B1/de
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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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/0423—Threaded with plural threaded sections, e.g. with two-step threads
    • 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
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

Definitions

  • the present invention relates to a roto-percussion pipe.
  • roto-percussion pipes are formed with a tubular portion, at the end of which a male thread and a female thread are present. By connecting together a plurality of pipes using these threads, drill strings of any desired length can be obtained.
  • first end of a first pipe is fixed to a drilling head.
  • the second end of the first pipe is coupled to a roto-percussion drill bit which drills the ground.
  • the drill bit is disconnected from the second end, and the first end of a second pipe is screwed into this second end.
  • the second end of the second pipe is connected to the drill bit and drilling continues.
  • the aforedescribed process is repeated with a third pipe and so on, until the required drilling length has been reached.
  • Known pipes present standard two-start threads. This causes considerable problems in that often, during a pipe adding operation, the thread seizes, making the drill string unusable.
  • Document DE 19803304 A1 discloses a roto-percussion pipe according to the preamble of claim 1, wherein the pipe comprises a tubular portion having at its ends a female coupling, carrying a female thread, and a male coupling, carrying a male thread, and wherein these threads are three-starts threads.
  • the object of the present invention is to provide a roto-percussion pipe which overcomes the drawback of the known art by minimizing the danger of seizure during the connection of a new pipe or the disconnection of a pipe from the drill bit.
  • the pipe 1 presents a tubular portion 2 constructed of N80 special steel, which is of substantially tubular shape, internally hollow and of circular plan.
  • a female coupling 3 is welded having a female thread best visible in Figure 2 .
  • the thread in question has a 30 mm pitch and presents three starts.
  • commencement of the thread spiral has been removed to form a bevel which facilitates the connection between the male part and a further pipe.
  • a male coupling 4 is welded presenting a male thread best visible in Figure 3 .
  • the thread in question has a 30 mm pitch and presents three starts, and is suitable for connection to the female thread 3. It advantageously has a fillet radius R of 4 mm (see Figure 3 ).
  • R fillet radius
  • Both the couplings are made of 42 Cr Mo 4 steel, before being welded to the tubular portion they being subjected to surface hardening treatment, preferably nitriding. The portion at which the weld is to be made is then removed mechanically to provide the welding machine with a non-treated surface presenting mechanical characteristics suitable for the subsequent welding.
  • Centering profiles are created on the end portions 20 of the tubular portion and on the joining surfaces 30, 40 to facilitate coaxial mounting of the tubular portions and couplings.
  • tubular portion 2 is positioned between the male coupling 2 and female coupling 3, and a tie bar 10 is inserted through the pipe interior.
  • Two plates are rested against the couplings, and the tie bar is tightened using adjustment handles.
  • Manual spot welds (3-4) are then made between the couplings and the tubular portion 2, to maintain the pipe assembled before its final automatic welding.
  • the tie bar is then loosened and the pipe is passed to the wire welding machine 15 ( Figure 7 ).
  • the pipe is gripped within the welder headpiece 14 and two automatic weld passes are carried out by the head 18 positioned to straddle the tubular portion 2 and the female coupling 3.
  • the first pass forms a first weld seam ( Figure 4 ), with the second pass completely filling the welding region ( Figure 5 ).
  • the automatic welding is carried out on a wire welding machine in a protected atmosphere using an AISI 312 stainless steel welding wire.
  • the welding head 18 is then moved to straddle the male coupling 4 and the tubular portion 2, another weld then being made.
  • the presence of a 3-start thread enables a pipe inserted into one already used for drilling to be maintained coaxial, so preventing seizure.
  • the nitriding treatment considerably lengthens the life of the pipes in question.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Pens And Brushes (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (6)

  1. Dreh-Schlag-Bohrrohr (1), umfassend einen röhrenförmigen Abschnitt (2), der an seinen Enden eine weibliche Kupplung (3), die ein Innengewinde trägt, und eine männliche Kupplung (4), die ein Außengewinde trägt, aufweist, wobei die männliche Kupplung (4) und die weibliche Kupplung (3) ermöglichen, dass das Rohr (1) mit anderen damit identischen Rohren verbunden werden kann, um einen Dreh-Schlag-Bohrstrang der erforderlichen Länge zu bilden, wobei die Gewinde mindestens drei Anfänge aufweisen, wobei das Rohr (1) dadurch gekennzeichnet ist, dass der röhrenförmige Abschnitt (2) und die Kupplungen (3; 4) als getrennte Teile ausgebildet sind, wobei die Kupplungen (3; 4) an den röhrenförmigen Abschnitt (2) angeschweißt sind, wobei die Kupplungen (3; 4) an ihren Oberflächen gehärtet sind, wobei eine Oberflächenhärtungsbehandlung an den Kupplungen (3; 4) durchgeführt wird, bevor sie an den röhrenförmigen Abschnitt (2) angeschweißt werden, wobei der gehärtete Abschnitt der Oberfläche der Kupplungsabschnitte, an denen die Schweißung vorgenommen werden soll, nach der Behandlung mechanisch entfernt wird, um der Schweißmaschine eine unbehandelte Oberfläche bereitzustellen, die mechanische Eigenschaften aufweist, die für das anschließende Schweißen geeignet sind, wobei der röhrenförmige Abschnitt (2) mit Endabschnitten (20) versehen wird, Zentrierprofile an den Endabschnitten (20) des röhrenförmigen Abschnitts (2) und an Fügeflächen (30, 40) der Kupplungen (3, 4) erstellt werden, um die koaxiale Montage des röhrenförmigen Abschnitts (2) und der Kupplungen (3; 4) zu erleichtern, wobei der rohrförmige Abschnitt (2) aus N80 Spezialstahl hergestellt ist, der sich von 42 Cr Mo 4 Stahl unterscheidet, aus dem die Kupplungen (3; 4) hergestellt sind, und wobei eine Schweißnaht, die aus einem AISI 312 Edelstahl Schweißdraht besteht, zwischen dem röhrenförmigen Abschnitt (2) und den Kupplungen (3; 4) gebildet ist.
  2. Rohr (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Oberflächenhärtungsbehandlung Nitrieren ist.
  3. Rohr (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Anfang der Gewindespirale entfernt ist, um das Eingreifen zu erleichtern.
  4. Rohr (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Kupplungen (3; 4) Eingriffsschrägen aufweisen, um die gegenseitige Zentrierung zu erleichtern.
  5. Rohr (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Gewinde eine Steigung von 30 mm aufweist.
  6. Rohr (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Gewinde einen Rundungsradius R von 4 mm aufweist.
EP08166631.5A 2007-10-16 2008-10-15 Gewinde für Dreh-Schlag-Bohrrohr Active EP2050922B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001992A ITMI20071992A1 (it) 2007-10-16 2007-10-16 Tubo per roto-percussione

Publications (3)

Publication Number Publication Date
EP2050922A2 EP2050922A2 (de) 2009-04-22
EP2050922A3 EP2050922A3 (de) 2017-03-08
EP2050922B1 true EP2050922B1 (de) 2023-01-11

Family

ID=40303650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08166631.5A Active EP2050922B1 (de) 2007-10-16 2008-10-15 Gewinde für Dreh-Schlag-Bohrrohr

Country Status (3)

Country Link
EP (1) EP2050922B1 (de)
ES (1) ES2937164T3 (de)
IT (1) ITMI20071992A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108343385A (zh) * 2017-12-29 2018-07-31 中国石油天然气股份有限公司 伸缩装置及其加工方法和管柱
CN109441369A (zh) * 2018-12-19 2019-03-08 中国石油大学(北京) 三导程石油套管螺纹连接机构及其套管管柱
WO2022180225A2 (en) * 2021-02-26 2022-09-01 Sandvik Mining And Construction Tools Ab Coupling for connecting downhole tubulars with improved stress distribution

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268248A (en) * 1963-11-08 1966-08-23 Douglas Aircraft Co Inc Inter-locking welded joint
DE3427837A1 (de) * 1984-07-27 1986-02-06 Ford-Werke AG, 5000 Köln Verfahren zum herstellen von verbundschweissteilen
US4858294A (en) * 1987-05-15 1989-08-22 Skf Industrial Trading And Development Co. B.V. Method of producing an object, in particular a rolling bearing, consisting of at least two moving parts locked into each other
US20040226754A1 (en) * 2003-05-16 2004-11-18 Atlas Copco Secoroc Ab Connection rod and method for production thereof
US20050087581A1 (en) * 2003-10-27 2005-04-28 Otten Gregory K. Welding Alignment Device, and Methods of Using Same
US20070029290A1 (en) * 2003-10-02 2007-02-08 Magna Drivetrain Ag & Co Kg Method for the plasma, laser or electron beam welding of identical or different materials with a tendency for excessive hardening, with copper or a copper alloy as a filler material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6609441A (de) * 1965-07-08 1967-01-09
FI68293B (fi) * 1982-11-30 1985-04-30 Airam Ab Oy Foerfarande i laonghaolbergborrning och borrstaongsystem
US5810401A (en) * 1996-05-07 1998-09-22 Frank's Casing Crew And Rental Tools, Inc. Threaded tool joint with dual mating shoulders
DE19803304C5 (de) * 1997-05-29 2010-09-30 Boart Longyear Gmbh & Co. Kg Hartmetallwerkzeugfabrik Bohrgestänge zum Drehschlagbohren, insbesondere zum Überlagerungsbohren
DE10020388B4 (de) * 2000-04-26 2012-03-29 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Bohrgestänge mit Gewindeverbindung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268248A (en) * 1963-11-08 1966-08-23 Douglas Aircraft Co Inc Inter-locking welded joint
DE3427837A1 (de) * 1984-07-27 1986-02-06 Ford-Werke AG, 5000 Köln Verfahren zum herstellen von verbundschweissteilen
US4858294A (en) * 1987-05-15 1989-08-22 Skf Industrial Trading And Development Co. B.V. Method of producing an object, in particular a rolling bearing, consisting of at least two moving parts locked into each other
US20040226754A1 (en) * 2003-05-16 2004-11-18 Atlas Copco Secoroc Ab Connection rod and method for production thereof
US20070029290A1 (en) * 2003-10-02 2007-02-08 Magna Drivetrain Ag & Co Kg Method for the plasma, laser or electron beam welding of identical or different materials with a tendency for excessive hardening, with copper or a copper alloy as a filler material
US20050087581A1 (en) * 2003-10-27 2005-04-28 Otten Gregory K. Welding Alignment Device, and Methods of Using Same

Also Published As

Publication number Publication date
EP2050922A3 (de) 2017-03-08
ES2937164T3 (es) 2023-03-24
ITMI20071992A1 (it) 2009-04-17
EP2050922A2 (de) 2009-04-22

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