CN203559801U - 钻杆的内管与短节的连接结构 - Google Patents
钻杆的内管与短节的连接结构 Download PDFInfo
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CN201320613138.XU CN203559801U (zh) | 2013-09-30 | 2013-09-30 | 钻杆的内管与短节的连接结构 |
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CN103510876A (zh) * | 2013-09-30 | 2014-01-15 | 无锡中地地质装备有限公司 | 钻杆的内管与短节的连接结构 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN103510876A (zh) * | 2013-09-30 | 2014-01-15 | 无锡中地地质装备有限公司 | 钻杆的内管与短节的连接结构 |
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Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: WUXI GEOTEC DRILLING EQUIPMENT CO., LTD. Free format text: FORMER OWNER: WUXI GEOTEC GEOLOGICAL EQUIPMENT CO., LTD. Effective date: 20140410 |
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C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20140410 Address after: 214000 Jiangsu Province, Wuxi city Xishan District Yangjian machinery equipment Industrial Park B District Patentee after: WUXI ZHONGDI DRILLING EQUIPMENT CO., LTD. Address before: 214000 Xintai industrial supporting garden, Mei Cun, New District, Jiangsu, Wuxi Patentee before: Wuxi Geotec Geological Equipment Co., Ltd. |
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20150930 |
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EXPY | Termination of patent right or utility model |