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WO2003062585A1 - Mecanisme d'entrainement - Google Patents

Mecanisme d'entrainement Download PDF

Info

Publication number
WO2003062585A1
WO2003062585A1 PCT/SE2002/002275 SE0202275W WO03062585A1 WO 2003062585 A1 WO2003062585 A1 WO 2003062585A1 SE 0202275 W SE0202275 W SE 0202275W WO 03062585 A1 WO03062585 A1 WO 03062585A1
Authority
WO
WIPO (PCT)
Prior art keywords
dogging element
drill bit
dogging
splines
outer tube
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/SE2002/002275
Other languages
English (en)
Inventor
Thomas Greijer
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.)
Epiroc Drilling Tools AB
Original Assignee
Atlas Copco Secoroc 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 Atlas Copco Secoroc AB filed Critical Atlas Copco Secoroc AB
Priority to EP02793615A priority Critical patent/EP1463869B1/fr
Priority to CA002470211A priority patent/CA2470211A1/fr
Priority to US10/499,060 priority patent/US20060000645A1/en
Priority to DE60220097T priority patent/DE60220097T2/de
Publication of WO2003062585A1 publication Critical patent/WO2003062585A1/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
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/20—Drives for drilling, used in the borehole combined with surface drive

Definitions

  • the present invention relates to a driver or dogging element for transferring torsion forces between a rotating outer tube and the drill bit of a down-the-hole hammer.
  • rotational forces, feed, and percussion energy are transferred from a drilling unit to a down-the-hole hammer that is lowered into the hole to be drilled.
  • the rotational forces are transferred with the aid of a rotating outer tube such as to cause the drill bit to rotate, and the percussion forces are transferred with the aid of a piston or ram that moves reciprocatingly in the tube in its longitudinal direction.
  • the rotational force is transferred from the outer tube by means of a chuck or dogging element screwed firmly into the outer tube.
  • a chuck or dogging element Arranged inside the dogging element or chuck is an array of splines which co- act with splines arranged on the outside of the drill bit shaft.
  • the drill bit, the outer tube and the dogging element or chuck are all made of steel.
  • an object of the present invention is to provide for the transfer of torsion forces between a rotating outer tube and a drill bit of a down-the-hole hammer a novel driver or dogging element that overcomes the aforesaid problems.
  • FIG. 1 is a longitudinally sectioned view of a drill bit for a down-the-hole hammer and shows those parts that are in closest connection with the drill bit; and
  • Figure 2 is a cross-sectional view of an inventive dogging element included in the Figure 1 embodiment .
  • Figure 1 thus shows a drill bit 1 that has rock drilling buttons 2 mounted on its front end in a known manner.
  • the drill bit 1 also includes a shaft 3 which is provided with longitudinally extending splines 4 along a part of its length.
  • the drill bit also has a rear end 5 against which a percussion piston is intended to strike.
  • the drill bit 1 typically includes a longitudinally extending channel 6 through which compressed air is blown out from the front part of the drill to blow the drill cuttings away from the drill bit and out of the drill hole.
  • the shaft 3 carries a driver or dogging element 7 which is provided internally with longitudinally extending splines 8 that co-act with the splines 4.
  • the dogging element 7 is generally in the form of a sleeve and is provided along at least part of its length with an external screw thread 9 by means of which the dogging element 7 can be screwed securely to the front end of an outer tube 10 that surrounds at least a part of both the dogging element 7 and the shaft 3 of the drill bit 1.
  • the outer tube 10 also surrounds the percussion piston 11.
  • the down-the-hole hammer can be spliced or joined to allow the drill run to be extended to a desired length.
  • the drilling unit causes the outer tube 10 to rotate, wherewith the rotational movement of the tube is transmitted to the dogging element 7 which, in turn, transfers the rotational movement to the drill bit 1 through the medium of the spline connection 8, 4.
  • the dogging element 7 is made of a material that is significantly softer than those parts of the drill bit 1 that co-act with the dogging element, i.e. than the shaft 3, therewith avoiding those problems associated with the formation of cracks, fissures, and with breakage of the shaft 3.
  • a bronze alloy is a suitable material for the dogging element. This alloy may be a tin bronze alloy or a chromium bronze alloy.
  • a tin bronze alloy produced by Applicants Atlas Copco Secoroc AB and designated 11 9351 93 has been found to be excellent in this respect.
  • the dogging element 7 When the dogging element 7 is made of this softer material, it is this material that suffers the wear and tear rather than the steel in the shaft 3 of the drill bit co-acting with the dogging element.
  • force is transmitted by the splines 8 on the dogging element to the splines 4 on the shaft 3, wherewith the splines 8 on the dogging element, which are softer than the splines 4, will become worn instead of the splines 4 on shaft of the drill bit 1.
  • the splines 8 on the dogging element may be allowed to wear down to about half their original width before needing to replace the dogging element. Breakage or fracture of the dogging element 7 will not cause any serious damage, since it is only the dogging element that breaks while the drill bit will still be held firmly by the outer tube 10.
  • the preferred material is not only softer than steel, but also has higher thermal conductivity and lower friction than steel, meaning that the stresses and strains in the spline connection will be much lower than those experienced with known techniques using steel on steel contact.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Vending Machines For Individual Products (AREA)
  • Pyrane Compounds (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Dental Preparations (AREA)
  • Organic Insulating Materials (AREA)

Abstract

L'invention concerne un élément d'entraînement ou de serrage conçu pour transférer des forces de torsion entre un tuyau externe rotatif (10) et un trépan (1) d'un marteau fond de trou. Cet élément de serrage (7) est constitué d'une matière plus souple que les parties (3, 4) du trépan (1) qui coopèrent avec l'élément de serrage (7, 8).
PCT/SE2002/002275 2001-12-21 2002-12-10 Mecanisme d'entrainement Ceased WO2003062585A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02793615A EP1463869B1 (fr) 2001-12-21 2002-12-10 Mecanisme d'entrainement
CA002470211A CA2470211A1 (fr) 2001-12-21 2002-12-10 Mecanisme d'entrainement
US10/499,060 US20060000645A1 (en) 2001-12-21 2002-12-10 Driver
DE60220097T DE60220097T2 (de) 2001-12-21 2002-12-10 Mitnehmer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0104376-9 2001-12-21
SE0104376A SE524153C2 (sv) 2001-12-21 2001-12-21 Medbringare till sänkborrhammare utförd i material mjukare än materialet i skaftet

Publications (1)

Publication Number Publication Date
WO2003062585A1 true WO2003062585A1 (fr) 2003-07-31

Family

ID=20286474

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/002275 Ceased WO2003062585A1 (fr) 2001-12-21 2002-12-10 Mecanisme d'entrainement

Country Status (9)

Country Link
US (1) US20060000645A1 (fr)
EP (1) EP1463869B1 (fr)
AT (1) ATE362035T1 (fr)
CA (1) CA2470211A1 (fr)
DE (1) DE60220097T2 (fr)
ES (1) ES2287350T3 (fr)
SE (1) SE524153C2 (fr)
WO (1) WO2003062585A1 (fr)
ZA (1) ZA200404804B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011023829A1 (fr) 2009-08-31 2011-03-03 Minroc Technical Promotions Limited Ensemble trépan pour outils de forage à percussion à commande hydraulique
US7975784B2 (en) 2006-01-04 2011-07-12 Minroc Technical Promotions Limited Drill bit assembly for fluid-operated percussion drill tools
WO2012049331A2 (fr) 2010-10-15 2012-04-19 Minroc Technical Promotions Limited Marteau de fond de trou
EP2470744A4 (fr) * 2009-08-28 2017-01-18 Atlas Copco Secoroc AB Composant de train de tiges de forage pour contrôle du bruit lors d un forage à percussion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090500A (en) * 1990-11-30 1992-02-25 Sandvik Rock Tools, Inc. Replaceable wear sleeve for percussion drill
WO1995016848A1 (fr) * 1993-12-13 1995-06-22 G-Drill Ab Perforatrice de roches fond de trou
WO1996015349A1 (fr) * 1994-11-11 1996-05-23 Ilomaeki Valto Procede de forage d'un trou au moyen d'un marteau piqueur, marteau piqueur concerne et jonction entre le marteau piqueur et le porte-burin
US5803192A (en) * 1996-05-13 1998-09-08 Holte; Ardis L. Drill bit retainer for a down hole hammer assembly
US5918687A (en) * 1997-01-27 1999-07-06 Columbia Gas Distribution Companies Small diameter impact boring tool

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973047A (en) * 1958-11-06 1961-02-28 Thompson Products Ltd Rock drill bit and method of manufacture thereof
USRE36002E (en) * 1990-04-26 1998-12-22 Sds Digger Tools Pty, Ltd. Transmission sleeve for a down hole hammer
US6105693A (en) * 1999-02-18 2000-08-22 Sandvik Ab Partially enhanced percussive drill bit
SE523946C2 (sv) * 2001-12-21 2004-06-08 Atlas Copco Secoroc Ab Sänkborrhammare där ytterröret helt omsluter en medbringare
WO2003084647A1 (fr) * 2002-04-03 2003-10-16 Cleaire Advanced Emission Controls, Llc. Porte-injecteur refroidi a l'aide d'un fluide

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090500A (en) * 1990-11-30 1992-02-25 Sandvik Rock Tools, Inc. Replaceable wear sleeve for percussion drill
WO1995016848A1 (fr) * 1993-12-13 1995-06-22 G-Drill Ab Perforatrice de roches fond de trou
WO1996015349A1 (fr) * 1994-11-11 1996-05-23 Ilomaeki Valto Procede de forage d'un trou au moyen d'un marteau piqueur, marteau piqueur concerne et jonction entre le marteau piqueur et le porte-burin
US5803192A (en) * 1996-05-13 1998-09-08 Holte; Ardis L. Drill bit retainer for a down hole hammer assembly
US5918687A (en) * 1997-01-27 1999-07-06 Columbia Gas Distribution Companies Small diameter impact boring tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7975784B2 (en) 2006-01-04 2011-07-12 Minroc Technical Promotions Limited Drill bit assembly for fluid-operated percussion drill tools
EP2470744A4 (fr) * 2009-08-28 2017-01-18 Atlas Copco Secoroc AB Composant de train de tiges de forage pour contrôle du bruit lors d un forage à percussion
WO2011023829A1 (fr) 2009-08-31 2011-03-03 Minroc Technical Promotions Limited Ensemble trépan pour outils de forage à percussion à commande hydraulique
DE202010017983U1 (de) 2009-08-31 2013-06-12 Mincon International Bohrmeisselanordnung für fluidbetriebene Schlagbohrwerkzeuge
WO2012049331A2 (fr) 2010-10-15 2012-04-19 Minroc Technical Promotions Limited Marteau de fond de trou

Also Published As

Publication number Publication date
ZA200404804B (en) 2005-08-29
EP1463869B1 (fr) 2007-05-09
CA2470211A1 (fr) 2003-07-31
US20060000645A1 (en) 2006-01-05
DE60220097D1 (de) 2007-06-21
SE524153C2 (sv) 2004-07-06
SE0104376D0 (sv) 2001-12-21
EP1463869A1 (fr) 2004-10-06
SE0104376L (sv) 2003-06-22
DE60220097T2 (de) 2008-01-10
ATE362035T1 (de) 2007-06-15
ES2287350T3 (es) 2007-12-16

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