Patents by Inventor Meichun Li

Meichun Li 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).

  • Bio-enzyme degradable temporary plugging material and preparation method and application thereof
    Patent number: 12110449
    Abstract: Disclosed is a bio-enzyme degradable temporary plugging material and a preparation method and application thereof in the technical field of natural gas hydrate drilling and production; the preparation method of the bio-enzyme degradable temporary plugging material includes the following steps: mixing the ceramsite with an aqueous solution of 3-aminopropyl trimethoxysilane before a stirring reaction and drying to obtain modified ceramsite; and fully dispersing the modified ceramsite, ethyl cellulose, and epoxy resin in dichloromethane to obtain an oil phase; adding the oil phase into a gelatin aqueous solution and mixing uniformly; after a stirring reaction, evaporating an organic solvent, filtering, washing, and drying, to obtain the bio-enzyme degradable temporary plugging material.
    Type: Grant
    Filed: December 21, 2023
    Date of Patent: October 8, 2024
    Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Jintang Wang, Bo Liao, Xiaohui Sun, Jiaqi Xu, Yingrui Bai, Jian Li, Xianbin Huang, Jiafeng Jin, Meichun Li, Shenglong Shi, Kaihe Lv, Jingping Liu, Jinsheng Sun
  • High temperature and high salinity-resistant complementarily rigid-flexible plugging agent and method for preparing the same and water-based drilling fluid and use thereof
    Patent number: 11970655
    Abstract: A high temperature and high salinity-resistant complementarily rigid-flexible plugging agent, a method for preparing the same, and a water-based drilling fluid and a use thereof.
    Type: Grant
    Filed: October 14, 2022
    Date of Patent: April 30, 2024
    Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Jingping Liu, Jinsheng Sun, Kaihe Lv, Meichun Li, Jintang Wang, Jiafeng Jin, Yingrui Bai, Xianbin Huang, Jian Li, Shenglong Shi
  • HIGH TEMPERATURE AND HIGH SALINITY-RESISTANT COMPLEMENTARILY RIGID-FLEXIBLE PLUGGING AGENT AND METHOD FOR PREPARING THE SAME AND WATER-BASED DRILLING FLUID AND USE THEREOF
    Publication number: 20240010904
    Abstract: A high temperature and high salinity-resistant complementarily rigid-flexible plugging agent, a method for preparing the same, and a water-based drilling fluid and a use thereof.
    Type: Application
    Filed: October 14, 2022
    Publication date: January 11, 2024
    Applicant: China University of Petroleum (East China)
    Inventors: Jingping LIU, Jinsheng SUN, Kaihe LV, Meichun LI, Jintang WANG, Jiafeng JIN, Yingrui BAI, Xianbin HUANG, Jian LI, Shenglong SHI
  • Modified cellulose nanocrystals and their use in drilling fluids
    Patent number: 11028307
    Abstract: Bentonite (or other clay) water-based drilling fluids incorporating functionalized cellulose nanocrystals are disclosed. Cellulose nanocrystals are modified with tailored surface charges or tailored levels of salt-tolerant polymer grafting, and combined with bentonite (or other clay) nanoplatelets in an aqueous suspension. Thermal performance of drilling fluids can also be enhanced by surface grafting of thermally functional polymers onto cellulose nanocrystals.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: June 8, 2021
    Assignee: Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
    Inventors: Qinglin Wu, Meichun Li
  • Modified Cellulose Nanocrystals and Their Use in Drilling Fluids
    Publication number: 20190127625
    Abstract: Bentonite (or other clay) water-based drilling fluids incorporating functionalized cellulose nanocrystals are disclosed. Cellulose nanocrystals are modified with tailored surface charges or tailored levels of salt-tolerant polymer grafting, and combined with bentonite (or other clay) nanoplatelets in an aqueous suspension. Thermal performance of drilling fluids can also be enhanced by surface grafting of thermally functional polymers onto cellulose nanocrystals.
    Type: Application
    Filed: October 31, 2018
    Publication date: May 2, 2019
    Applicant: Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
    Inventors: Qinglin Wu, Meichun Li