EP0077336A1 - Kupplungsverlängerung für gesteinsbohrmaschinen. - Google Patents

Kupplungsverlängerung für gesteinsbohrmaschinen.

Info

Publication number
EP0077336A1
EP0077336A1 EP82901041A EP82901041A EP0077336A1 EP 0077336 A1 EP0077336 A1 EP 0077336A1 EP 82901041 A EP82901041 A EP 82901041A EP 82901041 A EP82901041 A EP 82901041A EP 0077336 A1 EP0077336 A1 EP 0077336A1
Authority
EP
European Patent Office
Prior art keywords
coupling
rod
sleeve
screw
plain
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.)
Granted
Application number
EP82901041A
Other languages
English (en)
French (fr)
Other versions
EP0077336B1 (de
Inventor
Gosta 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.)
SECOROC AB
Original Assignee
Fagersta 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 Fagersta AB filed Critical Fagersta AB
Priority to AT8282901041T priority Critical patent/ATE13925T1/de
Publication of EP0077336A1 publication Critical patent/EP0077336A1/de
Application granted granted Critical
Publication of EP0077336B1 publication Critical patent/EP0077336B1/de
Expired 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 an extension coupling for rock drilling equipment, comprising a coupling rod having a screw-threaded portion with an external thread of smaller diameter than the diameter of the non-threaded part of the rod, and a sleeve-like portion having a part provided with an internal thread corresponding to the external thread of said rod.
  • a coupling rod having a screw-threaded portion with an external thread of smaller diameter than the diameter of the non-threaded part of the rod, and a sleeve-like portion having a part provided with an internal thread corresponding to the external thread of said rod.
  • the power of the drilling machine is increased by increasing the percussion energy of the hammer of the drilling machine, and also by increas ⁇ ing the torque of the machine, or by increasing the pressure at which the drilling equipment is fed against the rod, or by means of a co ⁇ bination of these measures.
  • a drill bit or a coupling sleeve is mounted onto the coupling rod via a coupling joint, for example screwed. It is also conventional for the length of the hollowed portion in the drill bit or
  • An object of the present invention is to provide a supporting action effective to increase the bending stresses in said sensitive or risk sections, by extending the drill bit and coupling sleeve.
  • the extension coupling according to the invention is characterized in that the sleeve-shaped part includes an extension in the form of a non-threaded skirt- shaped portion which extends from the threaded part of the sleeve-shaped portion to its outer end, and which embraces a part of the coupling rod behind the screw- thread, to provide a supporting effect which decreases the bending stresses on the coupling.
  • the extension coupling is charac ⁇ terized in that the extension having the form of a non- threaded skirt-like portion of the sleeve-like part has an innter diameter which is slide-fitted to the outer diameter of the non-threaded part of the coupling rod.
  • the extension coupling according to the invention has the advantage of eliminating practically completely the occurrence of bending stresses at said sensitive or risk sections of the drill rods, and also the dangerous fatigue effects of said bending stresses .
  • the extended part of the skirt of the drill bit or coupling sleeve has a ⁇ uppor ⁇ ing effect and because it assists in reducing the occurrence of harr.ful bending stresses in operation it is effective in reducing the risk of fracture at the
  • Figure 1 is a partial sectional view of a drill bit pro ⁇ vided with an extended skirt in accordance with the inven ⁇ tion
  • Figure 2 is a partial sectional view through a coupling sleeve provided with an extended skirt in accordance with the invention.
  • FIG. 1 there is shown a coupling rod 1 which is provided with a screw-thred and which has a drill bit 2 screwed thereonto.
  • the coupling rod has a screw-threaded portion 3 which meshes with a corresponding screw-threaded portion 4 of the drill bit.
  • the drill bit has an extended skirt 5, the end part of which is slide-fitted over the plain part 6 of the coupling rod, i.e. the part thereof not provided with a screw thread.
  • the inner diameter of the skirt 5 is a slightly greater or substantially equal to the outer diameter of the coupling rod, while the length of said skirt is such that subsequent to assembling the coupling the skirt will extend over the necked portion 7 of the coupling rod, said necked portion forr.ing a weak or sensitive section, and continues up along the plain portion 6 of the coupling rod.
  • Figure 2 illustrates two coupling rods 8 and 9 which are also provided with a screw-thread and screwed into a coupling sleeve 10 so that the mutually opposing ends of said rods abut each other.
  • the screw-threaded portion 12 of the coupling rod 9 meshes with the screw-threaded portion 13 of the sleeve, and the extended skirt 14 of said sleeve extends over the necked portion 15 of the rod and continues up along the plain part 16 of said rod.
  • the skirt 14 is a slide fit with the plain portion 16 and thus has an inner diameter which is somewhat greater or substantially equal to the outer diameter of ⁇ he plain portion 16.
  • V ⁇ :PO extension have been described with reference to screw- threads it will be understood that other types of screw- threads can be used, such as different types of sawtooth threads, different types of rope-threads and different types of round threads, and other types of threads .
  • the extended skirt passes beyond the necked portion of the coupling rod and embraces the plain part of said rod. It is also possible, however, to make the skirt shorter, so that it does not reach across the plain portion of the rod, but embraces solely the necked portion or a part of said necked portion, for example by being made a slide- fit with said portion.
  • the coupling rod without the necked portion, in which case the plain portions 6, 16 of the illustrated embodiments are connected directly to the screw-threaded portions 3 , 12.
  • an intermediate sleeve made of a plastics or rubber material, or some other soft and damping material, can be arranged between the extended skirt and the coupling rod.

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)
EP82901041A 1981-04-24 1982-03-26 Kupplungsverlängerung für gesteinsbohrmaschinen Expired EP0077336B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT8282901041T ATE13925T1 (de) 1981-04-24 1982-03-26 Kupplungsverlaengerung fuer gesteinsbohrmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8102626 1981-04-24
SE8102626A SE426089B (sv) 1981-04-24 1981-04-24 Skarvforband vid bergborrutrustning

Publications (2)

Publication Number Publication Date
EP0077336A1 true EP0077336A1 (de) 1983-04-27
EP0077336B1 EP0077336B1 (de) 1985-06-19

Family

ID=20343676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82901041A Expired EP0077336B1 (de) 1981-04-24 1982-03-26 Kupplungsverlängerung für gesteinsbohrmaschinen

Country Status (9)

Country Link
EP (1) EP0077336B1 (de)
AU (1) AU547091B2 (de)
CA (1) CA1178944A (de)
DE (1) DE3264233D1 (de)
FI (1) FI77303C (de)
IE (1) IE52613B1 (de)
SE (1) SE426089B (de)
WO (1) WO1982003653A1 (de)
ZA (1) ZA822203B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553171B1 (fr) * 1983-10-03 1988-04-08 Dril Quip Inc Appareil et procede pour raccorder notamment des elements cylindriques tels que des tubes
SE8600199L (sv) * 1986-01-17 1987-07-18 Loevab Loef Och Oestlund Ab Borrverktyg
US5622820A (en) * 1988-03-10 1997-04-22 City Of Hope Method for amplification and detection of RNA and DNA sequences
SE522221C2 (sv) 2001-10-12 2004-01-27 Sandvik Ab Gängförband för slående bergborrning
JP4954542B2 (ja) 2005-12-09 2012-06-20 三菱マテリアル株式会社 掘削ロッド、掘削ビット及び掘削工具
WO2007133150A1 (en) * 2006-05-17 2007-11-22 Sandvik Intellectual Property Ab A top hammer rock-drilling tool, a drill rod and coupling sleeve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2122757A (en) * 1935-07-05 1938-07-05 Hughes Tool Co Drill stem coupling
SE401232B (sv) * 1970-05-04 1978-04-24 Sandvik Ab Gengad forbindning for slagborrstenger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8203653A1 *

Also Published As

Publication number Publication date
FI824324A0 (fi) 1982-12-16
DE3264233D1 (en) 1985-08-01
FI824324L (fi) 1982-12-16
SE426089B (sv) 1982-12-06
FI77303C (fi) 1989-02-10
IE52613B1 (en) 1987-12-23
ZA822203B (en) 1983-02-23
WO1982003653A1 (en) 1982-10-28
AU8275682A (en) 1982-11-04
SE8102626L (sv) 1982-10-25
FI77303B (fi) 1988-10-31
CA1178944A (en) 1984-12-04
EP0077336B1 (de) 1985-06-19
AU547091B2 (en) 1985-10-03
IE820955L (en) 1982-10-24

Similar Documents

Publication Publication Date Title
US6196598B1 (en) Straight hole drilling system
CA2391158C (en) A thread joint, a male portion and a female portion
US4484833A (en) Sucker rod
SE520729C2 (sv) Tunnväggig borrstångs- foderrörsförbindning
US3922104A (en) Tension link control device
AU2009200611A1 (en) A thread joint for a drill string for percussive rock-drilling
RU2277162C2 (ru) Буровой инструмент
KR101006360B1 (ko) 충격식 착암용 수형부, 드릴 비트 및 나사 조인트
US2186482A (en) Ground rod
US4955644A (en) Drill pipe coupling
EP0077336A1 (de) Kupplungsverlängerung für gesteinsbohrmaschinen.
US4002359A (en) Tool joint for drill pipes
US2216945A (en) Upset pipe joint
JPS5976394A (ja) ２部分構成ドリルビツト
US1879856A (en) Drill tool joint
US4430787A (en) Sucker rods with improved coupling capability and method
GB2085537A (en) Improvements in pipe couplings
CA2392411A1 (en) A thread joint and a male portion
AU722409B3 (en) Straight hole drilling system
SU941535A1 (ru) Резьбовое соединение бурильных труб
CA2303710C (en) Straight hole drilling system
CN115698463A (zh) 螺纹间隙
AU753579B2 (en) Thread coupling for a drill string for percussive rock drilling
GB2172649A (en) Tube coupler

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19821029

AK Designated contracting states

Designated state(s): AT DE FR GB

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

PUAC Information related to the publication of a b1 document modified or deleted

Free format text: ORIGINAL CODE: 0009299EPPU

AK Designated contracting states

Designated state(s): AT DE FR GB

REF Corresponds to:

Ref document number: 13925

Country of ref document: AT

Date of ref document: 19850715

Kind code of ref document: T

DB1 Publication of patent cancelled
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

REF Corresponds to:

Ref document number: 3264233

Country of ref document: DE

Date of ref document: 19850801

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SECOROC AB

ET Fr: translation filed
AK Designated contracting states

Designated state(s): AT DE FR GB

REF Corresponds to:

Ref document number: 15525

Country of ref document: AT

Date of ref document: 19850915

Kind code of ref document: T

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19860318

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890326

Ref country code: AT

Effective date: 19890326

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19891130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19891201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST