CN203271667U - 一种大通道油层保护器 - Google Patents
一种大通道油层保护器 Download PDFInfo
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- CN203271667U CN203271667U CN201320321775XU CN201320321775U CN203271667U CN 203271667 U CN203271667 U CN 203271667U CN 201320321775X U CN201320321775X U CN 201320321775XU CN 201320321775 U CN201320321775 U CN 201320321775U CN 203271667 U CN203271667 U CN 203271667U
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- piston
- protector
- protector body
- oil layer
- hole
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CN201320321775XU CN203271667U (zh) | 2013-06-06 | 2013-06-06 | 一种大通道油层保护器 |
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CN201320321775XU CN203271667U (zh) | 2013-06-06 | 2013-06-06 | 一种大通道油层保护器 |
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CN203271667U true CN203271667U (zh) | 2013-11-06 |
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CN201320321775XU Expired - Fee Related CN203271667U (zh) | 2013-06-06 | 2013-06-06 | 一种大通道油层保护器 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105863565A (zh) * | 2015-01-22 | 2016-08-17 | 中国石油天然气股份有限公司 | 煤储层保护装置 |
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2013
- 2013-06-06 CN CN201320321775XU patent/CN203271667U/zh not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105863565A (zh) * | 2015-01-22 | 2016-08-17 | 中国石油天然气股份有限公司 | 煤储层保护装置 |
CN105863565B (zh) * | 2015-01-22 | 2018-03-13 | 中国石油天然气股份有限公司 | 煤储层保护装置 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: NORTHEAST PETROLEUM UNIVERSITY Free format text: FORMER OWNER: ZHAO FULEI Effective date: 20150429 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20150429 Address after: 163000 No. 199, development road, hi tech Industrial Development Zone, Heilongjiang, Daqing Patentee after: Northeast Petroleum University Address before: 163000 Heilongjiang Province, Daqing city Saertu District School District No. 29 Patentee before: Zhao Fulei |
|
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20150606 |
|
EXPY | Termination of patent right or utility model |