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).

  • 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
  • System and method for an ultra highly available, high performance, persistent memory optimized, scale-out database
    Patent number: 11971869
    Abstract: A shared-nothing database system is provided in which parallelism and workload balancing are increased by assigning the rows of each table to “slices”, and storing multiple copies (“duplicas”) of each slice across the persistent storage of multiple nodes of the shared-nothing database system. When the data for a table is distributed among the nodes of a shared-nothing system in this manner, requests to read data from a particular row of the table may be handled by any node that stores a duplica of the slice to which the row is assigned. For each slice, a single duplica of the slice is designated as the “primary duplica”. All DML operations (e.g. inserts, deletes, updates, etc.) that target a particular row of the table are performed by the node that has the primary duplica of the slice to which the particular row is assigned. The changes made by the DML operations are then propagated from the primary duplica to the other duplicas (“secondary duplicas”) of the same slice.
    Type: Grant
    Filed: October 26, 2022
    Date of Patent: April 30, 2024
    Assignee: Oracle International Corporation
    Inventors: Jesse Kamp, Allison L. Holloway, Meichun Hsu, Hideaki Kimura, Boris Klots, Vasudha Krishnaswamy, Kartik Kulkarni, Teck Hua Lee, Yunrui Li, Aurosish Mishra, Ajit Mylavarapu, Sukhada Pendse, Garret F. Swart, Shasank K. Chavan, Tirthankar Lahiri, Juan R. Loaiza
  • 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