Patents by Inventor Zuwei Chen

Zuwei Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for preparing metal-chelate retarder by sol-gel method
    Patent number: 11603488
    Abstract: The present invention relates to a process for preparing a metal-chelate retarder by a sol-gel method. The method comprises the following steps: weighing calcium nitrate tetrahydrate, aluminum nitrate nonahydrate and ferric nitrate nonahydrate according to a certain mass ratio and adding them into deionized water; placing the mixed solution on a magnetic stirrer and stirring the mixed solution evenly; adding citric acid monohydrate or gluconic acid, ethylene glycol or glycerol, and placing the mixed solution into a water bath to react to obtain the metal-chelate retarder. The process of the present invention has a reliable principle, overcomes the defects of long production period, complex preparation and the like of the existing retarders, has the advantages of simple process operation, cheap and easily available raw materials, and short production period.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: March 14, 2023
    Assignees: SOUTHWEST PETROLEUM UNIVERSITY, CNPC BOHAI DRILLING ENGINEERING COMPANY LIMITED
    Inventors: Xiaowei Cheng, Shuxun Zhao, Yang Yu, Zhihui Lin, Gaoyin Zhang, Chaoming Wu, Kaiqiang Liu, Wenming Liu, Zuwei Chen, Jiawen Fu, Tianpeng Zuo, Ben Qi, Chunmei Zhang, Zaoyuan Li, Sheng Huang, Xiaoyang Guo
  • Oil well cement slurry high-temperature suspension stabilizer prepared from oil-based shale drilling cuttings
    Patent number: 11345844
    Abstract: An oil well cement slurry high-temperature suspension stabilizer prepared from oil-based shale drilling cuttings is provided. The high-temperature suspension stabilizer is reasonable in principle, inexpensive and easily available in raw materials, high in product uniformity and good in chemical stability. Meanwhile, waste is changed into wealth. Therefore, the high-temperature suspension stabilizer is environment-friendly and has a broad industrial application prospect.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: May 31, 2022
    Assignees: SOUTHWEST PETROLEUM UNIVERSITY, SOUTHWEST PETROLEUM UNIVERSITY ENVIORMENTAL PROTECTION TECHNOLOGY (CHENGDU) CO., LTD
    Inventors: Xiaowei Cheng, Gaoyin Zhang, Shunxiang Luo, Zuwei Chen, Sheng Huang, Kaiqiang Liu, Chunmei Zhang, Kaiyuan Mei, Jian Liu, Zaoyuan Li, Xiaoyang Guo
  • PROCESS FOR PREPARING METAL-CHELATE RETARDER BY SOL-GEL METHOD
    Publication number: 20210079288
    Abstract: The present invention relates to a process for preparing a metal-chelate retarder by a sol-gel method. The method comprises the following steps: weighing calcium nitrate tetrahydrate, aluminum nitrate nonahydrate and ferric nitrate nonahydrate according to a certain mass ratio and adding them into deionized water; placing the mixed solution on a magnetic stirrer and stirring the mixed solution evenly; adding citric acid monohydrate or gluconic acid, ethylene glycol or glycerol, and placing the mixed solution into a water bath to react to obtain the metal-chelate retarder. The process of the present invention has a reliable principle, overcomes the defects of long production period, complex preparation and the like of the existing retarders, has the advantages of simple process operation, cheap and easily available raw materials, and short production period.
    Type: Application
    Filed: July 22, 2020
    Publication date: March 18, 2021
    Inventors: Xiaowei CHENG, Shuxun ZHAO, Yang YU, Zhihui LIN, Gaoyin ZHANG, Chaoming WU, Kaiqiang LIU, Wenming LIU, Zuwei CHEN, Jiawen FU, Tianpeng ZUO, Ben QI, Chunmei ZHANG, Zaoyuan LI, Sheng HUANG, Xiaoyang GUO
  • OIL WELL CEMENT SLURRY HIGH-TEMPERATURE SUSPENSION STABILIZER PREPARED FROM OIL-BASED SHALE DRILLING CUTTINGS
    Publication number: 20200392393
    Abstract: An oil well cement slurry high-temperature suspension stabilizer prepared from oil-based shale drilling cuttings is provided. The high-temperature suspension stabilizer is reasonable in principle, inexpensive and easily available in raw materials, high in product uniformity and good in chemical stability. Meanwhile, waste is changed into wealth. Therefore, the high-temperature suspension stabilizer is environment-friendly and has a broad industrial application prospect.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 17, 2020
    Inventors: Xiaowei Cheng, Gaoyin Zhang, Shunxiang Luo, Zuwei Chen, Sheng Huang, Kaiqiang Liu, Chunmei Zhang, Kaiyuan Mei, Jian Liu, Zaoyuan Li, Xiaoyang Guo