Patents by Inventor Xiaohua Lian

Xiaohua Lian 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).

  • Exploitation method and exploitation well pattern for coalbed methane in low-permeability coalbed
    Patent number: 10731451
    Abstract: An exploitation method and an exploitation well pattern for coalbed methane in a low-permeability coalbed. The method comprises: determining a maximum principal stress direction in a low-permeability coalbed; disposing at least two large-roadway horizontal wells in the low-permeability coalbed; disposing a plurality of production wells on two sides of a horizontal segment of each of the at least two large-roadway horizontal wells, wherein a diameter of each of the production wells is smaller than a diameter of the horizontal segment; exploiting the coalbed methane in the low-permeability coalbed through the at least two large-roadway horizontal wells and the plurality of production wells. Through the horizontal segments of the large-roadway horizontal wells perpendicular to the maximum principal stress direction, it promotes stress release in low-permeability coalbed to form more fracture channels, thereby improving the exploitation efficiency of the coalbed methane in the low-permeability coalbed.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: August 4, 2020
    Assignee: PetroChina Company Limited
    Inventors: Yonggui Mei, Quanjiang Zhang, Biyun Zhu, Xianzhi Wang, Jian Guo, Wuchang Zhang, Xiaohua Lian, Shengfa Mao, Zhanxin Xue, Liuping Deng
  • EXPLOITATION METHOD AND EXPLOITATION WELL PATTERN FOR COALBED METHANE IN LOW-PERMEABILITY COALBED
    Publication number: 20190186252
    Abstract: The present disclosure discloses an exploitation method and an exploitation well pattern for coalbed methane in a low-permeability coalbed. The method comprises: determining a maximum principal stress direction in a low-permeability coalbed (1); disposing at least two large-roadway horizontal wells (3) in the low-permeability coalbed (1); disposing a plurality of production wells (4) on two sides of a horizontal segment (31) of each of the at least two large-roadway horizontal wells (3), wherein a diameter of each of the production wells (4) is smaller than a diameter of the horizontal segment (31) of the large-roadway horizontal well (3); exploiting the coalbed methane in the low-permeability coalbed through the at least two large-roadway horizontal wells (3) and the plurality of production wells (4).
    Type: Application
    Filed: February 25, 2019
    Publication date: June 20, 2019
    Inventors: Yonggui Mei, Quanjiang Zhang, Biyun Zhu, Xianzhi Wang, Jian Guo, Wuchang Zhang, Xiaohua Lian, Shengfa Mao, Zhanxin Xue, Liuping Deng