NO156952C - Boreskjr med jevnt fordelte stlinnsatser. - Google Patents
Boreskjr med jevnt fordelte stlinnsatser.Info
- Publication number
- NO156952C NO156952C NO811356A NO811356A NO156952C NO 156952 C NO156952 C NO 156952C NO 811356 A NO811356 A NO 811356A NO 811356 A NO811356 A NO 811356A NO 156952 C NO156952 C NO 156952C
- Authority
- NO
- Norway
- Prior art keywords
- evenly distributed
- steel inserts
- distributed steel
- drilling
- sheets
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title 1
- 239000010959 steel Substances 0.000 title 1
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
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
- E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts
-
- 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
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/16—Roller bits characterised by tooth form or arrangement
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)
- Excavating Of Shafts Or Tunnels (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16197780A | 1980-06-23 | 1980-06-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
NO811356L NO811356L (no) | 1981-12-28 |
NO156952B NO156952B (no) | 1987-09-14 |
NO156952C true NO156952C (no) | 1987-12-23 |
Family
ID=22583644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO811356A NO156952C (no) | 1980-06-23 | 1981-04-22 | Boreskjr med jevnt fordelte stlinnsatser. |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5715796A (de) |
AU (1) | AU543784B2 (de) |
CA (1) | CA1154752A (de) |
DE (1) | DE3117268A1 (de) |
GB (1) | GB2078826B (de) |
NO (1) | NO156952C (de) |
SE (1) | SE448015B (de) |
ZA (1) | ZA812521B (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29907492U1 (de) * | 1999-04-29 | 2000-09-28 | Wirth Maschinen- und Bohrgeräte-Fabrik GmbH, 41812 Erkelenz | Werkzeug zum Lösen von Erdreich |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2230569A (en) * | 1939-12-20 | 1941-02-04 | Globe Oil Tools Co | Roller cutter |
US2774571A (en) * | 1954-07-06 | 1956-12-18 | Hughes Tool Co | Cone type well drill |
US3726350A (en) * | 1971-05-24 | 1973-04-10 | Hughes Tool Co | Anti-tracking earth boring drill |
US3871488A (en) * | 1974-02-13 | 1975-03-18 | Daniel R Sabre | Rock drilling |
US4187922A (en) * | 1978-05-12 | 1980-02-12 | Dresser Industries, Inc. | Varied pitch rotary rock bit |
-
1981
- 1981-02-27 CA CA000371949A patent/CA1154752A/en not_active Expired
- 1981-04-14 SE SE8102397A patent/SE448015B/sv not_active IP Right Cessation
- 1981-04-15 ZA ZA00812521A patent/ZA812521B/xx unknown
- 1981-04-16 AU AU69615/81A patent/AU543784B2/en not_active Expired
- 1981-04-21 GB GB8112352A patent/GB2078826B/en not_active Expired
- 1981-04-22 NO NO811356A patent/NO156952C/no unknown
- 1981-04-30 JP JP6614481A patent/JPS5715796A/ja active Granted
- 1981-04-30 DE DE19813117268 patent/DE3117268A1/de active Granted
Also Published As
Publication number | Publication date |
---|---|
SE448015B (sv) | 1987-01-12 |
AU6961581A (en) | 1982-01-07 |
NO156952B (no) | 1987-09-14 |
DE3117268A1 (de) | 1982-04-15 |
NO811356L (no) | 1981-12-28 |
ZA812521B (en) | 1982-04-28 |
JPH0258433B2 (de) | 1990-12-07 |
AU543784B2 (en) | 1985-05-02 |
GB2078826A (en) | 1982-01-13 |
GB2078826B (en) | 1983-12-07 |
CA1154752A (en) | 1983-10-04 |
SE8102397L (sv) | 1981-12-24 |
JPS5715796A (en) | 1982-01-27 |
DE3117268C2 (de) | 1991-06-06 |
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