WO2001038685A1 - Joint fileté et élément mâle - Google Patents

Joint fileté et élément mâle Download PDF

Info

Publication number
WO2001038685A1
WO2001038685A1 PCT/SE2000/002200 SE0002200W WO0138685A1 WO 2001038685 A1 WO2001038685 A1 WO 2001038685A1 SE 0002200 W SE0002200 W SE 0002200W WO 0138685 A1 WO0138685 A1 WO 0138685A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
spigot
external thread
generally cylindrical
axial length
Prior art date
Application number
PCT/SE2000/002200
Other languages
English (en)
Inventor
Kenneth Larsson
Original Assignee
Sandvik Ab; (Publ)
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 Sandvik Ab; (Publ) filed Critical Sandvik Ab; (Publ)
Priority to AU17468/01A priority Critical patent/AU1746801A/en
Priority to JP2001540011A priority patent/JP2003515021A/ja
Priority to CA002392411A priority patent/CA2392411A1/fr
Priority to BR0015602-7A priority patent/BR0015602A/pt
Priority to EP00980172A priority patent/EP1240406A1/fr
Publication of WO2001038685A1 publication Critical patent/WO2001038685A1/fr

Links

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
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

Definitions

  • the present invention relates to a thread joint and a male portion according to the preambles of the independent claims.
  • a conventional thread joint between two components in a rock drilling equipment for percussive drilling normally uses cut male and female threads, see for example SE-B-469,602 and US-A-4,332,502.
  • a blank of steel is shaped, which includes an enlarged portion.
  • the ends of the enlarged portion connect to a clearance surface or a clearance groove of smaller diameter to receive at least parts of the threading tool and to a usually conical free end.
  • the enlarged portion is provided with a thread in a conventional way.
  • Sharp edges are formed at the thread entrance and the exit due to the geometries of the clearance groove and the free end surface.
  • Corresponding sharp edges are formed at threading of a female thread. The sharp edges make the male and female threads damage each other foremost at the respective free end during use of the joint. It is usually the male thread that limits the life span of the joint.
  • One object of the present invention is to provide a thread joint of the above- mentioned type, at which a good life span is attained.
  • Another object of the present invention is to provide a thread joint of the above-mentioned type, at which the male portion obtains a good life span.
  • Fig. 1 shows a partly sectioned view of a thread joint according to the invention between two identical drill components.
  • Fig. 2 shows a male portion according to the present invention in a perspective view.
  • Fig. 3 shows a female portion in a cross-sectional perspective view.
  • Fig. 4 shows a cross-section of a thread joint according to the present invention between a rock drill bit and a drill component.
  • a thread joint 10 preferably consists of two drill tubes or drill rods 10A, 10B that each includes an end with a projecting spigot or male portion 12 and an end with a sleeve or female portion 13.
  • the spigot has a generally cylindrical external thread 14 and the sleeve has a generally cylindrical internal thread 15.
  • Each thread 14, 15 preferably has only one entrance and one exit.
  • the threads 14 and 15 are conventionally designed such that when assembled abutment arises only at certain flank portions of the respective male and female portion. Contact between curved parties or between thread tips and thread bottoms do not occur.
  • US-A-4,968,068, which patent hereby is incorporated into the present description a thread joint is shown in which the present invention can be utilized.
  • the female portion 13 constitutes an integral part of the drill rod. Furthermore, the drill rod has a through-going flush channel 20, through which a flush medium, usually air and/or water, is transported.
  • the male thread or the generally cylindrical external thread 14 includes at least one outer thread end 21 and at least one inner thread end 22 arranged in connection with the associated full profile thread.
  • the female thread or the generally cylindrical internal thread 15 includes at least one outer thread end 23 and at least one inner thread end 24 arranged in connection with the associated full profile thread.
  • Each thread end 21-24 includes a sharp edge due to clearances developed before threading, i.e. conical clearances 31 , 32 on the spigot 12 and cylindrical clearances 33, 34 on the sleeve 13. The edge defines the smallest radius R of the respective thread, in the longitudinal section according to Fig. 3.
  • the male thread 14 and the female thread 15 has a mutual relationship as regards to the length and the position that the both thread ends or end areas 23, 24 of the female thread 15 do not contact the male thread 14 when the joint is tightened.
  • do not contact is here meant that the ends 23, 24 are provided at a distance from the male thread in a tightened joint. This has been achieved as follows:
  • the male thread 14 has a first axial length L1 between the thread ends 21 , 22 and the female thread 15 has a second axial length L2 between the thread ends 23, 24,
  • the length L1 is shorter than the length L2. Stated another way, the distance between the conical clearances 31 , 32 is smaller than the distance between the cylindrical clearances 33, 34.
  • the distance L3 between the free end surface 16 of the spigot 12 and the inner thread end or end area 24 of the female thread 15 is shorter than a distance L4 between the free end surface 16 of the spigot and the outer thread end or end area 21 of the male thread when the joint is tightened.
  • the corresponding relationship applies for the outer end of the joint. That is, the distance L5 between the shoulder 19 of the spigot 12 and the outer thread end or end area 23 of the female thread 15 is shorter than a distance L6 between the shoulder 19 of the spigot and the inner thread end or end area 22 of the male thread when the joint is tightened.
  • the outer and inner ends of the spigot 12 includes conical guiding surfaces 25, 26 which shall cooperate axially on each side of the female thread 15 with conical guiding surfaces 27 and 28, respectively. All cone apices of the conical guiding surfaces are directed in the impact direction F.
  • the length L1 of the male thread 14 is 50-80% of the length L of the spigot. Both end areas 21 , 22 of the male thread 14 are provided at the distances L4, L6 from the ends 16, 19 of the spigot.
  • a trapezoidal thread is shown in the embodiment but it is understood that the invention can be used in connection with all for percussive rock drilling serviceable threads, such as rope threads for example.
  • the female portion or the male portion may alternatively be integral with a rock drill bit instead of being integral with a drill rod or a drill tube.
  • Fig. 4 is shown how a rock drill bit 10C for percussive rock drilling with hard metal buttons 30 appear in a thread joint according to the present invention, with the same reference numerals as is used above.

Landscapes

  • 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)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

Cette invention un joint fileté et à un élément mâle de forage par percussion. Ce joint fileté comporte au moins un filetage extérieur généralement cylindrique (14) et un filetage intérieur généralement cylindrique (15). Le filetage extérieur (14), se trouve sur un goujon (12), conçu pour constituer une partie intégrante d'un premier élément de train de forage (10A, 10B). Les filetages possèdent des extrémités de filet (21-24) reliées à des filetages associés à profil droit. Ces filetages (14, 15) possèdent des zones terminales, la section longitudinale de chacun des filetages étant d'un diamètre (R) très restreint. Le filetage extérieur généralement cylindrique (14) est d'une première longueur axiale (L1) et le filetage intérieur généralement cylindrique (15) est d'une seconde longueur axiale (L2), la première longueur axiale (1) étant inférieure à la seconde (L2), de sorte que les deux zones terminales (23, 24)du filetage intérieur cylindrique (15) n'entrent pas en contact avec le filetage extérieur cylindrique (14).
PCT/SE2000/002200 1999-11-26 2000-11-10 Joint fileté et élément mâle WO2001038685A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU17468/01A AU1746801A (en) 1999-11-26 2000-11-10 A thread joint and a male portion
JP2001540011A JP2003515021A (ja) 1999-11-26 2000-11-10 ネジ式ジョイントおよび雄ネジ
CA002392411A CA2392411A1 (fr) 1999-11-26 2000-11-10 Joint filete et element male
BR0015602-7A BR0015602A (pt) 1999-11-26 2000-11-10 Junta rosqueada e uma porção macho
EP00980172A EP1240406A1 (fr) 1999-11-26 2000-11-10 Joint filet et l ment m le

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9904323A SE516874C2 (sv) 1999-11-26 1999-11-26 Gängförband för slående borrning och handel ingående i gängförbandet
SE9904323-4 1999-11-26

Publications (1)

Publication Number Publication Date
WO2001038685A1 true WO2001038685A1 (fr) 2001-05-31

Family

ID=20417896

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/002200 WO2001038685A1 (fr) 1999-11-26 2000-11-10 Joint fileté et élément mâle

Country Status (7)

Country Link
EP (1) EP1240406A1 (fr)
JP (1) JP2003515021A (fr)
AU (1) AU1746801A (fr)
BR (1) BR0015602A (fr)
CA (1) CA2392411A1 (fr)
SE (1) SE516874C2 (fr)
WO (1) WO2001038685A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6978852B2 (en) 2002-05-17 2005-12-27 Sandvik Ab Rock drill product and method
CN100335739C (zh) * 2002-06-27 2007-09-05 山特维克知识产权股份有限公司 用于冲击式岩石钻孔的阳性部分、钻头和螺纹接头
EP2383420A1 (fr) * 2010-04-29 2011-11-02 Sandvik Intellectual Property AB Trépan pour perçage de roche à percussion
EP3971385A1 (fr) * 2020-09-17 2022-03-23 Sandvik Mining and Construction Tools AB Conception de joint de train de tiges

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5358492B2 (ja) * 2009-09-08 2013-12-04 株式会社ジオ機材 打撃削孔用ロッドの連結構造

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537738A (en) * 1968-04-15 1970-11-03 Sandvikens Jernverks Ab Drill rod for long hole drilling in the ground
DE2115935A1 (de) * 1970-05-04 1971-11-18 Sandvikens Jernverks Ab, Sandviken (Schweden) Kupplungsgewinde für Schlagbohrstangen
EP0354887A1 (fr) * 1988-07-08 1990-02-14 Sandvik Aktiebolag Méthode d'obtention d'un accouplement fileté

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537738A (en) * 1968-04-15 1970-11-03 Sandvikens Jernverks Ab Drill rod for long hole drilling in the ground
DE2115935A1 (de) * 1970-05-04 1971-11-18 Sandvikens Jernverks Ab, Sandviken (Schweden) Kupplungsgewinde für Schlagbohrstangen
EP0354887A1 (fr) * 1988-07-08 1990-02-14 Sandvik Aktiebolag Méthode d'obtention d'un accouplement fileté
SE469603B (sv) * 1988-07-08 1993-08-02 Sandvik Ab Gaengfoerband

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6978852B2 (en) 2002-05-17 2005-12-27 Sandvik Ab Rock drill product and method
CN100335739C (zh) * 2002-06-27 2007-09-05 山特维克知识产权股份有限公司 用于冲击式岩石钻孔的阳性部分、钻头和螺纹接头
KR101006360B1 (ko) 2002-06-27 2011-01-10 산드빅 인터렉츄얼 프로퍼티 에이비 충격식 착암용 수형부, 드릴 비트 및 나사 조인트
EP2383420A1 (fr) * 2010-04-29 2011-11-02 Sandvik Intellectual Property AB Trépan pour perçage de roche à percussion
AU2011245728B2 (en) * 2010-04-29 2015-03-19 Sandvik Intellectual Property Ab Drill bit for percussive rock drilling
US9500037B2 (en) 2010-04-29 2016-11-22 Sandvik Intellectual Property Ab Drill bit for percussive rock drilling
EP3971385A1 (fr) * 2020-09-17 2022-03-23 Sandvik Mining and Construction Tools AB Conception de joint de train de tiges
WO2022058420A1 (fr) * 2020-09-17 2022-03-24 Sandvik Mining And Construction Tools Ab Conception de joint de train de tiges

Also Published As

Publication number Publication date
SE516874C2 (sv) 2002-03-19
AU1746801A (en) 2001-06-04
SE9904323L (sv) 2001-05-27
EP1240406A1 (fr) 2002-09-18
BR0015602A (pt) 2002-07-09
SE9904323D0 (sv) 1999-11-26
JP2003515021A (ja) 2003-04-22
CA2392411A1 (fr) 2001-05-31

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