CN203452664U - 纤维增强复合材料防偏磨连续抽油杆的活动开闸型连接头 - Google Patents
纤维增强复合材料防偏磨连续抽油杆的活动开闸型连接头 Download PDFInfo
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- CN203452664U CN203452664U CN201320477173.3U CN201320477173U CN203452664U CN 203452664 U CN203452664 U CN 203452664U CN 201320477173 U CN201320477173 U CN 201320477173U CN 203452664 U CN203452664 U CN 203452664U
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CN106761459A (zh) * | 2017-02-28 | 2017-05-31 | 中国石油大学(华东) | 一种以碳纤维为承载体的定长碳纤维连续抽油杆接头 |
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CN106761459A (zh) * | 2017-02-28 | 2017-05-31 | 中国石油大学(华东) | 一种以碳纤维为承载体的定长碳纤维连续抽油杆接头 |
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C14 | Grant of patent or utility model | ||
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Inventor after: Wu Xiaofa Inventor after: Song Guangqing Inventor after: Wang Libin Inventor after: Gao Chao Inventor after: Li Qiang Inventor after: Wu Lei Inventor after: Song Lili Inventor before: Wu Xiaofa Inventor before: Song Guangqing Inventor before: Wang Libin Inventor before: Gao Chao Inventor before: Li Qiang Inventor before: Wu Lei Inventor before: Song Lili |
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CP01 | Change in the name or title of a patent holder | ||
CP01 | Change in the name or title of a patent holder |
Address after: 257091, No. 221, South Road, an industrial park, Dongying Economic Development Zone, Shandong Patentee after: Shengli new big new materials Co.,Ltd. Address before: 257091, No. 221, South Road, an industrial park, Dongying Economic Development Zone, Shandong Patentee before: SHENGLI OIL FIELD XINDA PIPE INDUSTRY TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20140226 |