EP0563561B1 - Trépan de forage superposé - Google Patents

Trépan de forage superposé Download PDF

Info

Publication number
EP0563561B1
EP0563561B1 EP93102651A EP93102651A EP0563561B1 EP 0563561 B1 EP0563561 B1 EP 0563561B1 EP 93102651 A EP93102651 A EP 93102651A EP 93102651 A EP93102651 A EP 93102651A EP 0563561 B1 EP0563561 B1 EP 0563561B1
Authority
EP
European Patent Office
Prior art keywords
drilling bit
pivoting
bits
recesses
shaft
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.)
Expired - Lifetime
Application number
EP93102651A
Other languages
German (de)
English (en)
Other versions
EP0563561A1 (fr
Inventor
Peter Dipl.-Ing. Rosenkranz
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.)
Boart Longyear GmbH and Co KG
Original Assignee
Boart HWF GmbH and Co KG Hartmetallwerkzeugfabrik
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 Boart HWF GmbH and Co KG Hartmetallwerkzeugfabrik filed Critical Boart HWF GmbH and Co KG Hartmetallwerkzeugfabrik
Publication of EP0563561A1 publication Critical patent/EP0563561A1/fr
Application granted granted Critical
Publication of EP0563561B1 publication Critical patent/EP0563561B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/327—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being pivoted about a longitudinal axis
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Definitions

  • the present invention relates to a drill bit for overlay drilling with a head provided with hard metal pins or the like and a shaft supporting the head, the shaft having means for torsionally rigid connection to a driven inner pipe string, the drill bit having at least one flushing agent line, the head having a plurality of symmetrical Has recesses distributed over its circumference and wherein swivel bits are arranged in the recesses such that they come to lie within the drill bit diameter in the swiveled-in state and protrude in the drill bit diameter.
  • drilling devices for overlay drilling which use a drilling fluid with a An outer tube linkage carrying a ring drill bit, an inner tube linkage running in the outer tube linkage and carrying a central solid drill bit and provided with a first rotary drive rotating the inner tube linkage and a second rotary drive rotating the outer tube linkage, both linkages being mounted on a driven feed device (DE-C-2 924 393 ).
  • eccentric drilling devices A known eccentric drilling device is described in DE-C 3 024 102.
  • the eccentric drill bit is eccentrically clamped at the end of the outer pipe string in order to obtain a drilling diameter which is larger than the outer diameter of the outer pipe string. After releasing the tension, the eccentric drill bit with the inner pipe rod can be pulled back through the outer pipe rod.
  • a drill hole is produced during the overlay drilling, the diameter of which is larger than the outside diameter of the piping to be introduced.
  • the piping is expediently designed as an outer pipe string of the respective drilling device, the ring drill bit carried by the outer pipe string being lost in the case of the device described above as the first alternative, at least in the production of blind holes.
  • the distance between the outer pipe string and the actual pipe head must always be kept relatively small in order to prevent premature escalation in the borehole wall.
  • a suitable flushing agent such as air or a water / oil emulsion is discharged deep down - preferably through the inner pipe string.
  • the drilling mud consisting of cuttings and detergent, is flushed out of the borehole through the annular space between the inner pipe string and the outer pipe string.
  • the invention is therefore based on the object of designing and developing a drill bit of the type mentioned above in such a way that the drill bit, in particular for replacement, is always removed from the borehole again and yet a large overcut can be achieved.
  • the solution according to the invention also has economic advantages, since the individual swivel bits - in contrast to the ring drill bit which can no longer be replaced - can be replaced quickly and easily. This possible reduction in tool life can result in considerable savings in material selection.
  • each swivel crown is provided with an eccentrically arranged shaft and that it has a plurality of receiving bores in the region of the recesses for receiving the shafts of the individual swivel crowns.
  • the receiving bores and / or the swivel crowns have means for a mutual connection. This is particularly important because the drill bit with the swivel bits arranged on it must be recovered from the drill hole. It has proven to be particularly advantageous if each receiving bore in the drill bit has an annular groove and each swivel bit has a widening corresponding to the groove in the region of its shaft. In terms of production technology, it is particularly advantageous if the widening is designed as a spring ring arranged in the groove provided on the shaft of each Schwenbkkrone.
  • the flushing agent line branches in the shaft of the drill bit to the individual recesses for the swivel bits. It has been found that it is not necessary to also provide the swivel crowns with their own detergent lines if the detergent lines end in the region of the individual recesses. It is advantageous here if the openings of the flushing agent lines are arranged in the recesses in such a way that they are covered by the pivoted-in swivel crowns.
  • each recess has two rinsing bores which end in the central rinsing agent line located in the shaft and whose openings to the outside, ie are directed in the swivel direction of each swivel crown.
  • the pressure of the flushing agent supports the pivoting out of the borehole caused primarily by frictional engagement of the cutting attachments of the swivel crowns.
  • the area of the recesses always remains free of drilling mud, etc., so that the swivel crowns can be reliably pivoted into the recesses by rotating the inner boring bar by a small amount in the direction opposite to the drilling direction.
  • each swivel crown is chamfered in the region of the largest drill diameter when the swivel crowns are swiveled out, that is to say in the edge region of the "enlarged" drill diameter.
  • the figures show a drill bit consisting primarily of a head 1 and a shaft 2 for overlay drilling.
  • the head 1 of the drill bit according to the invention is provided with hard metal pins 3 in a known manner.
  • the shaft 2 is connected in a rotationally rigid manner to a driven and not shown inner tube linkage, a recess 4 being indicated in FIG. 3.
  • a flushing agent line 5 runs through the shaft 2 and the head 1 and is supplied with flushing agent for flushing out the cuttings from a flushing agent line running in the inner pipe string.
  • the head 1 has a plurality of recesses 6 arranged symmetrically over its circumference.
  • three recesses 6 are provided, in which swivel crowns 7 are arranged such that they come to lie within the drill bit diameter in the swiveled-in state and in project the swung-out state by a predetermined amount beyond the drill bit diameter. While all three swivel crowns 7 are shown in the swung-out state in FIG. 1, one of the three swivel crowns 7 is shown in its position pivoted into the recess 6 in FIG.
  • the embodiment shown relates to a small version of the drill bit according to the invention, in this case the drill head diameter is 88 mm, and in the swung-out state of the swivel bit 7, drilling is carried out with an "expanded" drill diameter of 124 mm. It is easy to see that larger versions allow a correspondingly higher number of swivel crowns 7.
  • each swivel crown 7 is provided with an eccentrically arranged shaft 8 and the drill bit in the region of its recesses 6 has a plurality of receiving bores 9 for receiving the shafts 8 of the individual swivel crowns 7, as can be seen particularly clearly from FIGS. 3 and 5 .
  • each receiving bore 9 in the drill bit is provided with an annular groove 10 and each swivel bit 7 on its shaft 8 with a widening corresponding to the groove 10. It is expedient if the widening is designed as a spring ring 11 arranged in the groove 10 provided on the shaft 8.
  • each swivel crown 7 is provided with a bevelled cutting surface 14 in the region of the largest drilling diameter when the swivel crowns 7 are swiveled out, as can be seen from FIG.
  • each recess 6 has two flushing bores 5A and 5B, which end in the central flushing agent line 5 located in the shaft 2 and whose openings 13 point outwards, ie in the pivoting direction of each swivel crown 7.
  • the flushing agent line 5 branches in the shaft 2 of the drill bit to the individual recesses 6 for the swivel bits 7, as can be clearly seen in FIG.

Claims (9)

  1. Couronne adaptée pour le perçage avec surdiamètre (système OD), comprenant une tête (1), équipée de broches (3) réalisées en métal dur ou d'éléments analogues, et une tige (2) portant la tête (1), la tige (2) comprenant des moyens pour une liaison rigide en torsion avec une timonerie entraînée de tube interne, la couronne présentant au moins un conduit (5) d'un agent de rinçage, couronne dans laquelle la tête (1) présente plusieurs évidements (6) répartis symétriquement sur son pourtour et dans laquelle des couronnes pivotantes (7) sont agencées dans les évidements (6) de telle sorte qu'elles se trouvent à l'intérieur du diamètre de la couronne à l'état non déployé et qu'elles dépassent d'une certaine mesure au-delà du diamètre de la couronne à l'état déployé, caractérisée en ce que les parois latérales (12) des évidements (6) forment une butée pour les couronnes pivotantes (7) et en ce que les broches (3) réalisées en métal dur sont réparties, dans les zones situées entre les évidements (6), sur tout le diamètre de la couronne.
  2. Couronne selon la revendication 1, caractérisée en ce que chaque couronne (7) pivotante est munie d'une tige (8) disposée d'une manière excentrique et en ce que la couronne présente dans les zones de ses évidements (6) plusieurs perçages (9) de réception pour recevoir les tiges (8) de chacune des couronnes pivotantes (7).
  3. Couronne selon la revendication 1 ou 2, caractérisée en ce que les perçages (9) de réception et/ou les couronnes (7) pivotantes présentent des moyens (10, 11) pour une liaison mutuelle.
  4. Couronne selon la revendication 2 et 3, caractérisée en ce que chaque perçage (9) de réception prévu dans la couronne, comporte une rainure (10) annulaire prévue et en ce que chaque couronne (7) pivotante présente à sa tige (8) un renflement associé à la rainure (10).
  5. Couronne selon la revendication 4, caractérisée en ce que le renflement est réalisé sous la forme d'une rondelle-ressort (11) disposée dans la rainure (10) prévue dans la tige (8).
  6. Couronne selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la conduite (5) de l'agent de rinçage se ramifie dans la tige (2) de la couronne en direction de chacun des évidements (6) destinés aux couronnes (7) pivotantes.
  7. Couronne selon la revendication 6, caractérisée en ce que les ouvertures (13) des conduites (5) d'agent de rinçage sont disposées dans les évidements (6) de telle façon qu'ils sont recouverts par les couronnes (7) pivotantes non déployées.
  8. Couronne selon la revendication 6 ou 7, caractérisée en ce que chaque évidement (6) présente deux perçages de rinçage (5A, 5B) qui débouchent dans la conduite centrale (5) d'agent de rinçage, se trouvant dans la tige (2) et dont les ouvertures (13) sont dirigées vers l'extérieur, c'est-à-dire dans la direction de pivotement de chaque couronne (7) pivotante.
  9. Couronne selon l'une quelconque des revendications 1 à 8, caractérisée en ce que chaque couronne (7) pivotante est munie, dans la zone du diamètre de perçage le plus grand et dans le cas de couronnes (7) pivotantes déployées, d'une surface (14) coupante chanfreinée.
EP93102651A 1992-04-02 1993-02-19 Trépan de forage superposé Expired - Lifetime EP0563561B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4211048A DE4211048C1 (fr) 1992-04-02 1992-04-02
DE4211048 1992-04-02

Publications (2)

Publication Number Publication Date
EP0563561A1 EP0563561A1 (fr) 1993-10-06
EP0563561B1 true EP0563561B1 (fr) 1997-04-23

Family

ID=6455875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102651A Expired - Lifetime EP0563561B1 (fr) 1992-04-02 1993-02-19 Trépan de forage superposé

Country Status (3)

Country Link
EP (1) EP0563561B1 (fr)
JP (1) JPH0610582A (fr)
DE (2) DE4211048C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7290624B2 (en) 2004-03-30 2007-11-06 “ALWAG” Tunnelausbau Gesellschaft m.b.H. Method and device for drilling holes in soil or rock material
DE102010027544A1 (de) 2010-07-16 2012-01-19 Minova International Ltd. Verfahren zur Herstellung der Bohrvorrichtungen vor allem für die Rohrschirmtechnik und Bohrvorrichtung

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0577545A1 (fr) * 1992-06-19 1994-01-05 Broder Ag Trépan de forage
GB2316964B (en) * 1996-09-04 2000-06-07 Bulroc Drill means
FR2797466B1 (fr) * 1999-08-13 2001-11-09 Gerard Arsonnet Procede pour mesurer un parametre d'une partie d'un sol situee a une distance donnee de sa surface et dispositif permettant de mettre en oeuvre le procede
DE19942986A1 (de) * 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
AR044551A1 (es) * 2003-05-26 2005-09-21 Shell Int Research Cabeza perforadora con percusion sistema de perforacion que comprende dicha cabeza perforadora y un metodo para perforar un pozo
AR044550A1 (es) 2003-05-26 2005-09-21 Shell Int Research Cabeza de perforacion y sistema y metodo para perforar un pozo de perforacion en una formacion de tierra
AR044485A1 (es) 2003-06-12 2005-09-14 Shell Int Research Mecha perforadora con percusion, sistema de perforacion que incluye dicha mecha perforadora y un metodo para perforar un pozo
US7455126B2 (en) 2004-05-25 2008-11-25 Shell Oil Company Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole
DE102008053276A1 (de) 2008-10-27 2010-05-20 Tracto-Technik Gmbh & Co. Kg Bohrkrone
CN102953910B (zh) * 2012-11-15 2015-06-17 中国石油集团西部钻探工程有限公司 捞矛水力推进器
DE102014104516A1 (de) 2014-03-31 2015-10-01 Sysbohr Gmbh - Bohrtechnik Für Den Spezialtiefbau Bohrkrone, insbesondere zum Überlagerungsbohren, sowie Bohrvorrichtung mit einer Bohrkrone
DE102018105340A1 (de) * 2018-03-08 2019-09-12 Mhwirth Gmbh Bohrkopf und diesen umfassendes Bohrsystem
CN109366750B (zh) * 2018-10-31 2021-01-05 重庆市瑞轩豪邦新型建材有限公司 一种混凝土加工装置
CN110552621A (zh) * 2019-08-21 2019-12-10 赵春海 新型油田井下螺杆钻具及使用方法
FI20225378A1 (fi) * 2022-05-03 2023-11-04 Mincon Nordic Oy Porakruunu ja menetelmä reiän poraamiseksi maahan asennettavaa putkea varten

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1858263A (en) * 1929-04-13 1932-05-17 Charlton James Rotary expansion drilling tool
DE2924393C2 (de) * 1979-06-16 1983-06-23 Brückner Grundbau GmbH, 4300 Essen Bohrvorrichtung zum Überlagerungsbohren
DE3024102C2 (de) * 1980-06-27 1982-09-23 Ing. Günter Klemm, Spezialunternehmen für Bohrtechnik, 5962 Drolshagen Exzenter-Bohrvorrichtung
GB2132252B (en) * 1982-10-25 1985-12-18 Tone Boring Co An air hammer drill device
CA2036602C (fr) * 1990-02-28 2001-04-24 Takeshi Hayashi Outil d'excavation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7290624B2 (en) 2004-03-30 2007-11-06 “ALWAG” Tunnelausbau Gesellschaft m.b.H. Method and device for drilling holes in soil or rock material
DE102010027544A1 (de) 2010-07-16 2012-01-19 Minova International Ltd. Verfahren zur Herstellung der Bohrvorrichtungen vor allem für die Rohrschirmtechnik und Bohrvorrichtung

Also Published As

Publication number Publication date
DE4211048C1 (fr) 1993-05-06
DE59306230D1 (de) 1997-05-28
EP0563561A1 (fr) 1993-10-06
JPH0610582A (ja) 1994-01-18

Similar Documents

Publication Publication Date Title
DE19780282B3 (de) Freitragend ausgebildeter Erweiterungsbohrer
EP0563561B1 (fr) Trépan de forage superposé
DE69721531T2 (de) Schneidewerkzeug zur benutzung im bohrloch
DE60002541T2 (de) Bi-zentrales Bohrzeug zum Bohren durch Verrohrungsschuh
DE3433097C2 (fr)
DE60133554T2 (de) Bohrmeissel
DE60100727T2 (de) Mehrrichtungsschneidelemente für bi-zentrales Bohrwerkzeug zum Bohren eines Verrohrungsschuhs
DE60127112T2 (de) Expandierbarer meissel
DE2822512C2 (fr)
DE2945766C2 (de) Bohrkrone und Bohrwerkzeug mit einer solchen Bohrkrone
EP0778391B1 (fr) Perceuse rotative hélicoidale à percussion
DE10357810A1 (de) Drehbarer Einsatz mit einer elastischen, spielbehafteten Sicherungshülse
DE3234552C2 (de) Vorrichtung zum Herstellen eines Gesteinsbohrlochs
DE2629695A1 (de) Vorrichtung zum bohren von erdloechern
DE69816857T2 (de) Fräswerkzeug zur verwendung in einem bohrloch und fräsverfahren
DE2846699A1 (de) Bohrloch-beruehrungsvorrichtung fuer grundloch-anordnungen
DE2813850A1 (de) Bohrmeissel fuer erd- und gesteinsbohrungen
EP1083294B1 (fr) Outil de forage
EP0937860A1 (fr) Outil de forage et ou de frappe
DE60104082T2 (de) Schneidstruktur für Bohrmeissel
DE3338577A1 (de) Drucklufthammer-bohrvorrichtung
DE3401243C2 (fr)
DE2837038C2 (de) Bohrkopf zum Erweitern von Gesteinsbohrlöchern durch Aufwärtsbohren
EP0003815A1 (fr) Trépan de machines à percussion rotatives
EP0577545A1 (fr) Trépan de forage

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19931104

17Q First examination report despatched

Effective date: 19950210

18D Application deemed to be withdrawn

Effective date: 19951223

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

D18D Application deemed to be withdrawn (deleted)
GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19970423

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19970424

REF Corresponds to:

Ref document number: 59306230

Country of ref document: DE

Date of ref document: 19970528

ET Fr: translation filed
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

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000126

Year of fee payment: 8

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: 20011031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: GB

Payment date: 20100428

Year of fee payment: 18

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

Ref country code: DE

Payment date: 20110216

Year of fee payment: 19

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110219

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59306230

Country of ref document: DE

Representative=s name: PATENT- UND RECHTSANWAELTE HANSMANN & VOGESER, DE

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

Ref country code: GB

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

Effective date: 20110219

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59306230

Country of ref document: DE

Representative=s name: WEICKMANN & WEICKMANN PATENTANWAELTE - RECHTSA, DE

Effective date: 20120206

Ref country code: DE

Ref legal event code: R082

Ref document number: 59306230

Country of ref document: DE

Representative=s name: WEICKMANN & WEICKMANN, DE

Effective date: 20120206

Ref country code: DE

Ref legal event code: R082

Ref document number: 59306230

Country of ref document: DE

Representative=s name: PATENT- UND RECHTSANWAELTE HANSMANN & VOGESER, DE

Effective date: 20120206

Ref country code: DE

Ref legal event code: R081

Ref document number: 59306230

Country of ref document: DE

Owner name: LONGYEAR TM, INC., SOUTH JORDAN, US

Free format text: FORMER OWNER: BOART HWF GMBH & CO KG HARTMETALLWERKZEUGFABRIK, 36151 BURGHAUN, DE

Effective date: 20120206

Ref country code: DE

Ref legal event code: R081

Ref document number: 59306230

Country of ref document: DE

Owner name: LONGYEAR TM, INC., US

Free format text: FORMER OWNER: BOART HWF GMBH & CO KG HARTMETALLWERKZEUGFABRIK, 36151 BURGHAUN, DE

Effective date: 20120206

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59306230

Country of ref document: DE

Effective date: 20120901

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

Ref country code: DE

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

Effective date: 20120901