CN204476286U - 一种径向钻井专用套管开孔钻头 - Google Patents
一种径向钻井专用套管开孔钻头 Download PDFInfo
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- CN204476286U CN204476286U CN201520094021.4U CN201520094021U CN204476286U CN 204476286 U CN204476286 U CN 204476286U CN 201520094021 U CN201520094021 U CN 201520094021U CN 204476286 U CN204476286 U CN 204476286U
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CP01 | Change in the name or title of a patent holder |
Address after: 257067 No. two, 233 South Road, Shandong, Dongying Patentee after: SHANDONG KERUI OILFIELD SERVICE GROUP Co.,Ltd. Address before: 257067 No. two, 233 South Road, Shandong, Dongying Patentee before: SHANDONG KERUI INTERNATIONAL OIL GAS ENGINEERING Co.,Ltd. |
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CP01 | Change in the name or title of a patent holder | ||
TR01 | Transfer of patent right |
Effective date of registration: 20200427 Address after: 610000 Area 408, 4th Floor B, Space Road, Longtan Industrial Park, Chenghua District, Chengdu City, Sichuan Province Patentee after: Sichuan Ruidu Petroleum Engineering Technology Service Co.,Ltd. Address before: 257067 No. two, 233 South Road, Shandong, Dongying Patentee before: SHANDONG KERUI OILFIELD SERVICE GROUP Co.,Ltd. |
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TR01 | Transfer of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20210210 |
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CF01 | Termination of patent right due to non-payment of annual fee |