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WO2000019057A1 - Train de tiges a raccords filetes pour perçage a percussion dans la roche - Google Patents

Train de tiges a raccords filetes pour perçage a percussion dans la roche Download PDF

Info

Publication number
WO2000019057A1
WO2000019057A1 PCT/SE1999/001653 SE9901653W WO0019057A1 WO 2000019057 A1 WO2000019057 A1 WO 2000019057A1 SE 9901653 W SE9901653 W SE 9901653W WO 0019057 A1 WO0019057 A1 WO 0019057A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
drill string
rock drilling
male
male thread
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.)
Ceased
Application number
PCT/SE1999/001653
Other languages
English (en)
Inventor
Christer Gustafsson
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.)
Uniroc AB
Original Assignee
Uniroc 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
Application filed by Uniroc AB filed Critical Uniroc AB
Priority to EP99954561A priority Critical patent/EP1117898A1/fr
Priority to AU10880/00A priority patent/AU753579B2/en
Priority to CA002345707A priority patent/CA2345707A1/fr
Publication of WO2000019057A1 publication Critical patent/WO2000019057A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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 coupling for a drill string for percussive rock drilling.
  • the present invention which is defined in the subsequent claim, aims at achieving a thread coupling where the above mentioned load increase near the contact surface between the two drill string elements is avoided. Through this one can increase the drill rate without deteriorating the service life compared to previously known equipment. This is achieved through having a male thread with variable pitch and a female thread with a thread opening which is wider than the crest of the male thread.
  • fig 1 shows a drill string with a thread coupling according to the invention.
  • Fig 2 shows a thread joint partly in section.
  • Fig 3 shows a part of the thread joint on a larger scale with exaggerated variation of the thread pitch.
  • the drill string shown in the drawing comprises a drill bit 1, a drill rod 2 and a shank adapter 3.
  • Drill bit, drill rod and shank adapter are drill string elements.
  • a first drill string element 3 is provided with a male thread 4 and a first impact surface 6.
  • a second drill string element 2 is provided with a female thread 5 and a second impact surface 7.
  • the impact surfaces 6,7 abut against each other during drilling.
  • the abutment is situated at the outer end of drill string element 2, so-called soulder abutment.
  • the male thread 4 has an axially varying thread pitch. Furthermore the female thread 5 has a thread opening which is wider than the crest 9 of the male thread 4. The female thread has substaantially constant pitch. Through these features the thread coupling can be tightened in spite of the threads not having the same pitch. If e.g. the female thread has a pitch of 15 mm the male thread can have a pitch which is 15+(x/15)*0.2 mm where x is a running coordinate in the longitudinal direction of the thread. In the shown example the pitch of the thread is largest near the outer end 10 of the thread 4. This means that the thread coupling is prestressed near the outer end 10 so that one avoids overloading adjacent the contact surfaces 6,7. If one instead of shoulder abutment, as shown, has bottom abutment the thread 4 has the smallest pitch near the outer end 10.

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)

Abstract

Cette invention concerne un raccord fileté pour train de tiges utilisé dans le perçage à percussion. Ce raccord fileté comporte une filetage mâle (4) et un filetage femelle (5) correspondant. Le filetage mâle se trouve sur un premier élément de tige (3) présentant une première surface d'impact (6), et le filetage femelle sur un second élément de tige (2) présentant une seconde surface d'impact (7). Le filetage mâle (4) présente un pas variable axialement et le filet femelle (5) une gorge (8) plus large que la crête (9) du filet mâle.
PCT/SE1999/001653 1998-09-28 1999-09-22 Train de tiges a raccords filetes pour perçage a percussion dans la roche Ceased WO2000019057A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99954561A EP1117898A1 (fr) 1998-09-28 1999-09-22 Train de tiges a raccords filetes pour per age a percussion dans la roche
AU10880/00A AU753579B2 (en) 1998-09-28 1999-09-22 Thread coupling for a drill string for percussive rock drilling
CA002345707A CA2345707A1 (fr) 1998-09-28 1999-09-22 Train de tiges a raccords filetes pour percage a percussion dans la roche

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9803268A SE515517C2 (sv) 1998-09-28 1998-09-28 Gängförband för borrsträng för slående bergborrning
SE9803268-3 1998-09-28

Publications (1)

Publication Number Publication Date
WO2000019057A1 true WO2000019057A1 (fr) 2000-04-06

Family

ID=20412727

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/001653 Ceased WO2000019057A1 (fr) 1998-09-28 1999-09-22 Train de tiges a raccords filetes pour perçage a percussion dans la roche

Country Status (6)

Country Link
EP (1) EP1117898A1 (fr)
AU (1) AU753579B2 (fr)
CA (1) CA2345707A1 (fr)
SE (1) SE515517C2 (fr)
WO (1) WO2000019057A1 (fr)
ZA (1) ZA200102511B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2302506C2 (ru) * 2002-06-27 2007-07-10 Сандвик Интеллекчуал Проперти Аб Охватываемая часть буровой штанги, буровое долото и резьбовое соединение охватываемой части буровой штанги и бурового долота для ударного бурения горных пород
EP3298229B1 (fr) 2015-05-22 2020-10-14 Sandvik Intellectual Property AB Tige de forage ou adaptateur de couplage avec un embout renforcé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582348A (en) * 1983-08-31 1986-04-15 Hunting Oilfield Services (Uk) Limited Pipe connector with varied thread pitch
WO1997026437A1 (fr) * 1996-01-20 1997-07-24 Boart Longyear Limited Assemblage par vissage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582348A (en) * 1983-08-31 1986-04-15 Hunting Oilfield Services (Uk) Limited Pipe connector with varied thread pitch
WO1997026437A1 (fr) * 1996-01-20 1997-07-24 Boart Longyear Limited Assemblage par vissage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2302506C2 (ru) * 2002-06-27 2007-07-10 Сандвик Интеллекчуал Проперти Аб Охватываемая часть буровой штанги, буровое долото и резьбовое соединение охватываемой части буровой штанги и бурового долота для ударного бурения горных пород
EP3298229B1 (fr) 2015-05-22 2020-10-14 Sandvik Intellectual Property AB Tige de forage ou adaptateur de couplage avec un embout renforcé
EP3095954B1 (fr) 2015-05-22 2024-05-15 Sandvik Intellectual Property AB Tige de forage ou adaptateur de couplage avec un embout renforcé

Also Published As

Publication number Publication date
ZA200102511B (en) 2002-03-27
SE9803268D0 (sv) 1998-09-28
EP1117898A1 (fr) 2001-07-25
SE9803268L (sv) 2000-03-29
AU1088000A (en) 2000-04-17
SE515517C2 (sv) 2001-08-20
CA2345707A1 (fr) 2000-04-06
AU753579B2 (en) 2002-10-24

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