Patents by Inventor Zewei TANG

Zewei TANG 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).

  • Method and device for detecting damage rate of an inner coating of a downhole oil casing
    Patent number: 10641723
    Abstract: This disclosure provides a method and device for detecting the damage rate of an inner coating of a downhole oil casing. The method includes filling the oil casing with electrolyte, obtaining the well depth-detection current on a discharge electrode in a process of moving the discharge electrode from one end of the oil casing to the other end of the oil casing, and determining a well depth-damage rate state of the inner coating of the oil casing according to the well depth-detection current. This application can realize quantitative judgment for the damage rate of an inner coating of a downhole oil casing, resulting in rapid in detection speed, convenient and safe in operation, and low detection cost.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: May 5, 2020
    Assignee: PetroChina Company Limited
    Inventors: Qiongwei Li, Bihai Cheng, Zewei Tang, Jianqiang Xue, Caili Fu, Huili Yang, Zhiwu He, Lihua Yang, Xinzhu Zhang, Yulai Sun
  • METHOD AND DEVICE FOR DETECTING DAMAGE RATE OF AN INNER COATING OF A DOWNHOLE OIL CASING
    Publication number: 20180209928
    Abstract: This disclosure provides a method and device for detecting the damage rate of an inner coating of a downhole oil casing. The method includes filling the oil casing with electrolyte, obtaining the well depth-detection current on a discharge electrode in a process of moving the discharge electrode from one end of the oil casing to the other end of the oil casing, and determining a well depth-damage rate state of the inner coating of the oil casing according to the well depth-detection current. This application can realize quantitative judgment for the damage rate of an inner coating of a downhole oil casing, resulting in rapid in detection speed, convenient and safe in operation, and low detection cost.
    Type: Application
    Filed: March 21, 2018
    Publication date: July 26, 2018
    Applicant: PETROCHINA COMPANY LIMITED
    Inventors: Qiongwei LI, Bihai CHENG, Zewei TANG, Jianqiang XUE, Caili FU, Huili YANG, Zhiwu HE, Lihua YANG, Xinzhu ZHANG, Yulai SUN