DE69005547T2 - Bohrer. - Google Patents

Bohrer.

Info

Publication number
DE69005547T2
DE69005547T2 DE69005547T DE69005547T DE69005547T2 DE 69005547 T2 DE69005547 T2 DE 69005547T2 DE 69005547 T DE69005547 T DE 69005547T DE 69005547 T DE69005547 T DE 69005547T DE 69005547 T2 DE69005547 T2 DE 69005547T2
Authority
DE
Germany
Prior art keywords
drill
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 - Fee Related
Application number
DE69005547T
Other languages
English (en)
Other versions
DE69005547D1 (de
Inventor
David Patrick Payne
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.)
Individual
Original Assignee
Individual
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
Priority claimed from GB898916171A external-priority patent/GB8916171D0/en
Priority claimed from GB898923279A external-priority patent/GB8923279D0/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of DE69005547D1 publication Critical patent/DE69005547D1/de
Publication of DE69005547T2 publication Critical patent/DE69005547T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-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
    • E21B10/26—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0018—Drills for enlarging a hole
    • B23B51/0045—Drills for enlarging a hole by expanding or tilting the toolhead
    • 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
DE69005547T 1989-07-14 1990-07-13 Bohrer. Expired - Fee Related DE69005547T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898916171A GB8916171D0 (en) 1989-07-14 1989-07-14 Improvements in drills
GB898923279A GB8923279D0 (en) 1989-10-16 1989-10-16 Improvements in drills

Publications (2)

Publication Number Publication Date
DE69005547D1 DE69005547D1 (de) 1994-02-10
DE69005547T2 true DE69005547T2 (de) 1994-06-23

Family

ID=26295611

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69005547T Expired - Fee Related DE69005547T2 (de) 1989-07-14 1990-07-13 Bohrer.

Country Status (2)

Country Link
EP (1) EP0408379B1 (de)
DE (1) DE69005547T2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPN674795A0 (en) * 1995-11-23 1995-12-14 Ramset Fasteners (Aust.) Pty. Limited Undercutting drills
GB0125882D0 (en) * 2001-10-27 2001-12-19 Technical Services Team Ltd Precision underreaming drill
EP2328705B1 (de) * 2008-08-29 2015-06-17 Sandvik, Inc. Schnipppatronen und materialentfernungswerkzeug damit
CN104234632B (zh) * 2014-08-21 2016-04-20 张陈泓 一种扩底钻头
CN107060653B (zh) * 2017-04-27 2023-11-21 西南石油大学 一种混合破岩机构和一种长寿命混合钻头
CN108044804A (zh) * 2017-11-17 2018-05-18 绿城装饰工程集团有限公司 一种倒锥形扩孔合金钻头
CN108789867B (zh) * 2018-06-08 2023-09-01 深圳市艺中乐珠宝有限公司 一种便于更换钻头的珠宝用打孔机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7820164U1 (de) * 1978-07-05 1978-10-12 Boehm, Edgar, 2800 Bremen Bohrwerkzeug zur herstellung einer konisch hinterschnittenen bohrung
DE3024656C2 (de) * 1980-06-30 1982-08-12 Heinrich 6102 Pfungstadt Liebig Hinterschnitt-Bohrwerkzeug
DE3300470A1 (de) * 1983-01-08 1984-07-12 Friedrich Duss Maschinenfabrik GmbH & Co, 7265 Neubulach Bohrwerkzeug zur erzeugung von hinterschnittten in vorbohrungen
US4635737A (en) * 1984-03-08 1987-01-13 Kabushiki Kaishi Miyanaga Undercutting drill
GB2184962B (en) * 1986-01-07 1989-10-18 David Patrick Payne Improvements in drills

Also Published As

Publication number Publication date
DE69005547D1 (de) 1994-02-10
EP0408379A1 (de) 1991-01-16
EP0408379B1 (de) 1993-12-29

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee