CN202064866U - 松软煤层自封闭式取样钻头 - Google Patents
松软煤层自封闭式取样钻头 Download PDFInfo
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- CN202064866U CN202064866U CN2011201694191U CN201120169419U CN202064866U CN 202064866 U CN202064866 U CN 202064866U CN 2011201694191 U CN2011201694191 U CN 2011201694191U CN 201120169419 U CN201120169419 U CN 201120169419U CN 202064866 U CN202064866 U CN 202064866U
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CN2011201694191U CN202064866U (zh) | 2011-05-25 | 2011-05-25 | 松软煤层自封闭式取样钻头 |
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CN2011201694191U CN202064866U (zh) | 2011-05-25 | 2011-05-25 | 松软煤层自封闭式取样钻头 |
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CN202064866U true CN202064866U (zh) | 2011-12-07 |
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CN2011201694191U Expired - Fee Related CN202064866U (zh) | 2011-05-25 | 2011-05-25 | 松软煤层自封闭式取样钻头 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102287154A (zh) * | 2011-05-25 | 2011-12-21 | 中煤科工集团重庆研究院 | 松软煤层自封闭式取样钻头 |
CN108386135A (zh) * | 2018-02-26 | 2018-08-10 | 中煤科工集团重庆研究院有限公司 | 可捞式套管钻进专用钻头 |
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2011
- 2011-05-25 CN CN2011201694191U patent/CN202064866U/zh not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102287154A (zh) * | 2011-05-25 | 2011-12-21 | 中煤科工集团重庆研究院 | 松软煤层自封闭式取样钻头 |
CN108386135A (zh) * | 2018-02-26 | 2018-08-10 | 中煤科工集团重庆研究院有限公司 | 可捞式套管钻进专用钻头 |
CN108386135B (zh) * | 2018-02-26 | 2019-04-30 | 中煤科工集团重庆研究院有限公司 | 可捞式套管钻进专用钻头 |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee |
Owner name: CHINA COAL TECHNOLOGY ENGINEERING GROUP CHONGQING Free format text: FORMER NAME: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RESEARCH INSTITUTE |
|
CP03 | Change of name, title or address |
Address after: 400039 Chongqing Jiulongpo Branch City Road No. 6 Patentee after: China Coal Technology Engineering Group Chongqing Research Institute Address before: Department of City Road, Jiulongpo District, Chongqing city science and technology Erlang Metro 400039 No. 6 Patentee before: China Coal Science and Industry Group Chongqing Research Institute |
|
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20160525 |
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CF01 | Termination of patent right due to non-payment of annual fee |