CN204457477U - 用于钻井接单根对扣的装置 - Google Patents
用于钻井接单根对扣的装置 Download PDFInfo
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- CN204457477U CN204457477U CN201520082528.8U CN201520082528U CN204457477U CN 204457477 U CN204457477 U CN 204457477U CN 201520082528 U CN201520082528 U CN 201520082528U CN 204457477 U CN204457477 U CN 204457477U
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Application Number | Priority Date | Filing Date | Title |
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CN201520082528.8U CN204457477U (zh) | 2015-02-05 | 2015-02-05 | 用于钻井接单根对扣的装置 |
Applications Claiming Priority (1)
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CN201520082528.8U CN204457477U (zh) | 2015-02-05 | 2015-02-05 | 用于钻井接单根对扣的装置 |
Publications (1)
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CN204457477U true CN204457477U (zh) | 2015-07-08 |
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CN201520082528.8U Expired - Fee Related CN204457477U (zh) | 2015-02-05 | 2015-02-05 | 用于钻井接单根对扣的装置 |
Country Status (1)
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CN (1) | CN204457477U (zh) |
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2015
- 2015-02-05 CN CN201520082528.8U patent/CN204457477U/zh not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right |
Effective date of registration: 20210203 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
TR01 | Transfer of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20210205 |
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CF01 | Termination of patent right due to non-payment of annual fee |