JPS521681B2 - - Google Patents
Info
- Publication number
- JPS521681B2 JPS521681B2 JP10273472A JP10273472A JPS521681B2 JP S521681 B2 JPS521681 B2 JP S521681B2 JP 10273472 A JP10273472 A JP 10273472A JP 10273472 A JP10273472 A JP 10273472A JP S521681 B2 JPS521681 B2 JP S521681B2
- Authority
- JP
- Japan
- 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
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10273472A JPS521681B2 (en) | 1972-10-16 | 1972-10-16 | |
| GB1794876A GB1452752A (en) | 1972-10-16 | 1973-10-12 | Method of pulling-up the cutting head of drilling apparatus |
| GB4779273A GB1452751A (en) | 1972-10-16 | 1973-10-12 | Drilling system and method of pulling it up |
| NO733983A NO142228C (en) | 1972-10-16 | 1973-10-15 | DRILLING EQUIPMENT AND PROCEDURE FOR AA PULL UP THE FITTING CUTTING ORGANIZATIONS |
| DE2351742A DE2351742C3 (en) | 1972-10-16 | 1973-10-15 | Drilling device and safety gear for it that can be lowered by a pipe |
| SE7313975A SE407255B (en) | 1972-10-16 | 1973-10-15 | DRILLING SYSTEM |
| CA183,405A CA982114A (en) | 1972-10-16 | 1973-10-15 | Drilling system and method of pulling it up |
| US406482A US3894590A (en) | 1972-10-16 | 1973-10-15 | Drilling system |
| AT875573A AT327845B (en) | 1972-10-16 | 1973-10-15 | DRILLING DEVICE |
| NL7314158.A NL159164B (en) | 1972-10-16 | 1973-10-15 | DRILLING SYSTEM WITH A DRILL PIPE AND A REMOVABLE THROUGH THROUGH THROUGH AND LOCKABLE DRILLING CHISEL ASSEMBLY WITH AN INTERNAL FLUSH FLUID FEED IN THE BOTTOM END. |
| FR7336837A FR2203016B1 (en) | 1972-10-16 | 1973-10-16 | |
| AU61444/73A AU468564B2 (en) | 1972-10-16 | 1973-10-16 | Drilling system and method of pulling it up |
| CA230,002A CA998383A (en) | 1972-10-16 | 1975-06-24 | Drilling system and method of pulling it up |
| SE7707003A SE424757B (en) | 1972-10-16 | 1977-06-16 | SET OUT TO PULL OUT A DRILL CHRONICLE FROM A DRILL HALL |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10273472A JPS521681B2 (en) | 1972-10-16 | 1972-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4959702A JPS4959702A (en) | 1974-06-10 |
| JPS521681B2 true JPS521681B2 (en) | 1977-01-17 |
Family
ID=14335462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10273472A Expired JPS521681B2 (en) | 1972-10-16 | 1972-10-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS521681B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6278393A (en) * | 1985-09-30 | 1987-04-10 | 国土防災技術株式会社 | Multistage hole enlarging bit |
-
1972
- 1972-10-16 JP JP10273472A patent/JPS521681B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4959702A (en) | 1974-06-10 |