Patents by Inventor Xun SHAN

Xun SHAN 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 of cement for well cementing in penetrated hydrate layer
    Patent number: 11719658
    Abstract: A performance evaluation device and a design method of a cement for well cementing in a penetrated hydrate layer are provided. The performance evaluation device includes an equivalent wellbore, an inner circulation system, an outer circulation system, a thermal insulation cover, a bracket, a temperature sensing system, and a cement mold. The device can simulate a true downhole situation, conduct an evaluation experiment on the heat insulation performance of a cementing cement, and conduct experiments at different temperatures with automatic temperature control. The design method is to use a low-hydration, early-strength, and heat-insulating cement slurry system during the well cementing in a penetrated hydrate layer, where the low-hydration and early-strength characteristics ensure the effective sealing of a hydrate layer during a cementing process, and the heat insulation characteristic results in low heat conductivity and thus can ensure the stability of a hydrate layer during a production operation.
    Type: Grant
    Filed: November 28, 2022
    Date of Patent: August 8, 2023
    Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Yuhuan Bu, Shengda Shen, Chang Lu, Huajie Liu, Shenglai Guo, Xun Shan, Rui Ma
  • DESIGN METHOD OF CEMENT FOR WELL CEMENTING IN PENETRATED HYDRATE LAYER
    Publication number: 20230091934
    Abstract: A performance evaluation device and a design method of a cement for well cementing in a penetrated hydrate layer are provided. The performance evaluation device includes an equivalent wellbore, an inner circulation system, an outer circulation system, a thermal insulation cover, a bracket, a temperature sensing system, and a cement mold. The device can simulate a true downhole situation, conduct an evaluation experiment on the heat insulation performance of a cementing cement, and conduct experiments at different temperatures with automatic temperature control. The design method is to use a low-hydration, early-strength, and heat-insulating cement slurry system during the well cementing in a penetrated hydrate layer, where the low-hydration and early-strength characteristics ensure the effective sealing of a hydrate layer during a cementing process, and the heat insulation characteristic results in low heat conductivity and thus can ensure the stability of a hydrate layer during a production operation.
    Type: Application
    Filed: November 28, 2022
    Publication date: March 23, 2023
    Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Yuhuan BU, Shengda SHEN, Chang LU, Huajie LIU, Shenglai GUO, Xun SHAN, Rui MA