JPH0399092U - - Google Patents
Info
- Publication number
- JPH0399092U JPH0399092U JP634590U JP634590U JPH0399092U JP H0399092 U JPH0399092 U JP H0399092U JP 634590 U JP634590 U JP 634590U JP 634590 U JP634590 U JP 634590U JP H0399092 U JPH0399092 U JP H0399092U
- Authority
- JP
- Japan
- Prior art keywords
- kelly bar
- bar
- protrusion
- kelly
- torque
- 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.)
- Pending
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634590U JPH0399092U (en]) | 1990-01-26 | 1990-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634590U JPH0399092U (en]) | 1990-01-26 | 1990-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0399092U true JPH0399092U (en]) | 1991-10-16 |
Family
ID=31510021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP634590U Pending JPH0399092U (en]) | 1990-01-26 | 1990-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0399092U (en]) |
-
1990
- 1990-01-26 JP JP634590U patent/JPH0399092U/ja active Pending
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