CN209427768U - 一种密闭混砂罐的清砂装置 - Google Patents
一种密闭混砂罐的清砂装置 Download PDFInfo
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CN109436851A (zh) * | 2018-12-21 | 2019-03-08 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | 一种密闭混砂罐的清砂装置及方法 |
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CN109436851A (zh) * | 2018-12-21 | 2019-03-08 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | 一种密闭混砂罐的清砂装置及方法 |
CN109436851B (zh) * | 2018-12-21 | 2023-10-17 | 中国石油天然气集团有限公司 | 一种密闭混砂罐的清砂装置及方法 |
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CB03 | Change of inventor or designer information |
Inventor after: Yang Yanzeng Inventor after: Nie Jun Inventor after: Zhang Dongzhe Inventor after: Ye Wenyong Inventor after: Wei Xiaofang Inventor after: Zhang Yue Inventor after: Song Xiaomei Inventor after: Liu Jie Inventor after: Cao Yanqin Inventor before: Yang Yanzeng Inventor before: Nie Jun Inventor before: Zhang Dongzhe Inventor before: Ye Wenyong Inventor before: Wei Xiaofang Inventor before: Zhang Yue Inventor before: Song Xiaomei Inventor before: Liu Jie Inventor before: Cao Yanqin |
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Effective date of registration: 20201109 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Shaanxi city of Xi'an province Weiyang District four road Fengcheng Changqing Technology Building Patentee before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |
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