JPH0547819Y2 - - Google Patents
Info
- Publication number
- JPH0547819Y2 JPH0547819Y2 JP5218688U JP5218688U JPH0547819Y2 JP H0547819 Y2 JPH0547819 Y2 JP H0547819Y2 JP 5218688 U JP5218688 U JP 5218688U JP 5218688 U JP5218688 U JP 5218688U JP H0547819 Y2 JPH0547819 Y2 JP H0547819Y2
- Authority
- JP
- Japan
- Prior art keywords
- kelly bar
- turntable
- ring gear
- flange
- cylindrical portion
- 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 - Lifetime
Links
- 238000005553 drilling Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218688U JPH0547819Y2 (enrdf_load_stackoverflow) | 1988-04-20 | 1988-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218688U JPH0547819Y2 (enrdf_load_stackoverflow) | 1988-04-20 | 1988-04-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01156292U JPH01156292U (enrdf_load_stackoverflow) | 1989-10-26 |
| JPH0547819Y2 true JPH0547819Y2 (enrdf_load_stackoverflow) | 1993-12-16 |
Family
ID=31278193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5218688U Expired - Lifetime JPH0547819Y2 (enrdf_load_stackoverflow) | 1988-04-20 | 1988-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0547819Y2 (enrdf_load_stackoverflow) |
-
1988
- 1988-04-20 JP JP5218688U patent/JPH0547819Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01156292U (enrdf_load_stackoverflow) | 1989-10-26 |
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