DE69107800D1 - Bohrweissel. - Google Patents
Bohrweissel.Info
- Publication number
- DE69107800D1 DE69107800D1 DE69107800T DE69107800T DE69107800D1 DE 69107800 D1 DE69107800 D1 DE 69107800D1 DE 69107800 T DE69107800 T DE 69107800T DE 69107800 T DE69107800 T DE 69107800T DE 69107800 D1 DE69107800 D1 DE 69107800D1
- Authority
- DE
- Germany
- Prior art keywords
- working face
- working
- crown
- elongate
- peaks
- 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
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
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
-
- 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
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
- E21B10/485—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type with inserts in form of chisels, blades or the like
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA909441 | 1990-11-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69107800D1 true DE69107800D1 (de) | 1995-04-06 |
DE69107800T2 DE69107800T2 (de) | 1995-08-03 |
Family
ID=25580413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69107800T Expired - Fee Related DE69107800T2 (de) | 1990-11-23 | 1991-11-22 | Bohrweissel. |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0487355B1 (de) |
AT (1) | ATE119233T1 (de) |
AU (1) | AU644241B2 (de) |
CA (1) | CA2056049C (de) |
DE (1) | DE69107800T2 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9419261D0 (en) | 1994-09-23 | 1994-11-09 | De Beers Ind Diamond | Saws |
KR100414006B1 (ko) * | 2001-02-20 | 2004-01-07 | 이화다이아몬드공업 주식회사 | 가공팁 및 이를 포함하는 절삭휠, 연마휠, 천공휠 |
US8758463B2 (en) | 2009-08-07 | 2014-06-24 | Smith International, Inc. | Method of forming a thermally stable diamond cutting element |
AU2010279295B2 (en) | 2009-08-07 | 2016-01-07 | Smith International, Inc. | Highly wear resistant diamond insert with improved transition structure |
AU2010279280B2 (en) | 2009-08-07 | 2016-11-03 | Smith International, Inc. | Diamond transition layer construction with improved thickness ratio |
CA2770306A1 (en) | 2009-08-07 | 2011-02-10 | Smith International, Inc. | Functionally graded polycrystalline diamond insert |
CA2770377C (en) | 2009-08-07 | 2017-07-25 | Smith International, Inc. | Polycrystalline diamond material with high toughness and high wear resistance |
US9482056B2 (en) | 2011-12-30 | 2016-11-01 | Smith International, Inc. | Solid PCD cutter |
JP6182365B2 (ja) * | 2013-06-17 | 2017-08-16 | 株式会社丸和技研 | ケーシングビット及びケーシングパイプ |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2495400A (en) * | 1946-06-03 | 1950-01-24 | Jr Edward B Williams | Core bit |
US2729427A (en) * | 1952-01-18 | 1956-01-03 | Longyear E J Co | Bit |
US2818233A (en) * | 1954-05-03 | 1957-12-31 | Jr Edward B Williams | Drill bit |
US3537538A (en) * | 1969-05-21 | 1970-11-03 | Christensen Diamond Prod Co | Impregnated diamond bit |
JPS5382601A (en) * | 1976-12-28 | 1978-07-21 | Tokiwa Kogyo Kk | Rotary grinding type excavation drill head |
US4128136A (en) * | 1977-12-09 | 1978-12-05 | Lamage Limited | Drill bit |
US4533004A (en) * | 1984-01-16 | 1985-08-06 | Cdp, Ltd. | Self sharpening drag bit for sub-surface formation drilling |
DE3511284A1 (de) * | 1984-03-30 | 1985-10-10 | De Beers Industrial Diamond Division (Proprietary) Ltd., Johannesburg, Transvaal | Schleifwerkzeug mit schleifeinsatz |
GB8907618D0 (en) * | 1989-04-05 | 1989-05-17 | Morrison Pumps Sa | Drilling |
-
1991
- 1991-11-22 EP EP91310787A patent/EP0487355B1/de not_active Expired - Lifetime
- 1991-11-22 CA CA002056049A patent/CA2056049C/en not_active Expired - Fee Related
- 1991-11-22 AU AU88076/91A patent/AU644241B2/en not_active Ceased
- 1991-11-22 DE DE69107800T patent/DE69107800T2/de not_active Expired - Fee Related
- 1991-11-22 AT AT91310787T patent/ATE119233T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0487355A1 (de) | 1992-05-27 |
DE69107800T2 (de) | 1995-08-03 |
CA2056049A1 (en) | 1992-05-24 |
AU8807691A (en) | 1992-05-28 |
AU644241B2 (en) | 1993-12-02 |
ATE119233T1 (de) | 1995-03-15 |
CA2056049C (en) | 1998-02-24 |
EP0487355B1 (de) | 1995-03-01 |
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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 |