JPS57180788A - Rock bit - Google Patents
Rock bitInfo
- Publication number
- JPS57180788A JPS57180788A JP2870982A JP2870982A JPS57180788A JP S57180788 A JPS57180788 A JP S57180788A JP 2870982 A JP2870982 A JP 2870982A JP 2870982 A JP2870982 A JP 2870982A JP S57180788 A JPS57180788 A JP S57180788A
- Authority
- JP
- Japan
- Prior art keywords
- rock bit
- rock
- bit
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25826181A | 1981-04-28 | 1981-04-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57180788A true JPS57180788A (en) | 1982-11-06 |
Family
ID=22979789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2870982A Pending JPS57180788A (en) | 1981-04-28 | 1982-02-23 | Rock bit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57180788A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62185996A (en) * | 1986-01-31 | 1987-08-14 | ヒユ−ズ・ツ−ル・カンパニ−・ユ−・エス・エ− | Lock bit |
-
1982
- 1982-02-23 JP JP2870982A patent/JPS57180788A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62185996A (en) * | 1986-01-31 | 1987-08-14 | ヒユ−ズ・ツ−ル・カンパニ−・ユ−・エス・エ− | Lock bit |
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