CS172329B2 - - Google Patents
Info
- Publication number
- CS172329B2 CS172329B2 CS382070A CS382070A CS172329B2 CS 172329 B2 CS172329 B2 CS 172329B2 CS 382070 A CS382070 A CS 382070A CS 382070 A CS382070 A CS 382070A CS 172329 B2 CS172329 B2 CS 172329B2
- Authority
- CS
- Czechoslovakia
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
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
- E21B10/40—Percussion drill bits with leading portion
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT513569A AT294728B (de) | 1969-05-30 | 1969-05-30 | Versenkhammer-Bohrgerät |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS172329B2 true CS172329B2 (cs) | 1976-12-29 |
Family
ID=3572313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS382070A CS172329B2 (cs) | 1969-05-30 | 1970-06-01 |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT294728B (cs) |
| BE (1) | BE751227A (cs) |
| CH (1) | CH516729A (cs) |
| CS (1) | CS172329B2 (cs) |
| DE (1) | DE2025439C3 (cs) |
| FR (1) | FR2043841A1 (cs) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2758385C3 (de) * | 1977-12-28 | 1981-03-26 | Ing. G. Klemm Bohrtechnik GmbH, 57489 Drolshagen | Schlag-Bohreinrichtung für Großlochbohrungen |
| US6892834B1 (en) * | 1999-06-18 | 2005-05-17 | Beck, Iii August H. | Piloted drill barrel and method of using same |
| FI115245B (fi) | 2002-11-18 | 2005-03-31 | Hannu Paasonen | Teräsovitelma iskevään poraan |
-
1969
- 1969-05-30 AT AT513569A patent/AT294728B/de not_active IP Right Cessation
-
1970
- 1970-05-25 DE DE19702025439 patent/DE2025439C3/de not_active Expired
- 1970-05-28 CH CH800670A patent/CH516729A/de not_active IP Right Cessation
- 1970-05-29 BE BE751227D patent/BE751227A/xx not_active IP Right Cessation
- 1970-05-29 FR FR7019791A patent/FR2043841A1/fr not_active Withdrawn
- 1970-06-01 CS CS382070A patent/CS172329B2/cs unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2025439A1 (de) | 1970-12-17 |
| BE751227A (fr) | 1970-11-03 |
| CH516729A (de) | 1971-12-15 |
| DE2025439C3 (de) | 1980-10-09 |
| FR2043841A1 (cs) | 1971-02-19 |
| DE2025439B2 (cs) | 1980-02-21 |
| AT294728B (de) | 1971-12-10 |