Patents by Inventor Hulli Guan

Hulli Guan 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).

  • Degradable polymeric nanoparticles and uses thereof
    Patent number: 11692120
    Abstract: Provided herein are drilling muds, including water-based drilling muds. The components of the drilling muds are a degradable fluid loss additive, for example, synthetic degradable nanoparticles, a clay mineral, for example, a smectite, and a base fluid, for example, water. Also provide are methods for preventing leak-off during a drilling operation and for automatically cleaning-up filter cake after completion of a drilling process both of which utilize the drilling muds and water-based drilling muds.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: July 4, 2023
    Assignee: Texas A&M University
    Inventors: Jenn-Tai Liang, Hulli Guan
  • Enzyme-encapsulated hydrogel nanoparticles for hydraulic fracturing fluid cleanup
    Patent number: 11667831
    Abstract: Provided herein is a hydraulic fracturing fluid containing enzyme encapsulated hydrogel nanoparticles and a breaker composition of a viscosifier-degrading enzyme encapsulated in the hydrogel nanoparticle. Also provided are methods for hydraulic fracturing utilizing hydrogel nanoparticles encapsulating an enzyme as a breaker to prevent the premature degradation of the fracturing fluid, to improve transport and placement of the proppant and to facilitate subsequent cleaning of the fracturing fluid.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: June 6, 2023
    Assignee: Texas A&M University
    Inventors: Jenn-Tai Liang, Hulli Guan
  • Degradable Polymeric Nanoparticles and Uses Thereof
    Publication number: 20210087454
    Abstract: Provided herein are drilling muds, including water-based drilling muds. The components of the drilling muds are a degradable fluid loss additive, for example, synthetic degradable nanoparticles, a clay mineral, for example, a smectite, and a base fluid, for example, water. Also provide are methods for preventing leak-off during a drilling operation and for automatically cleaning-up filter cake after completion of a drilling process both of which utilize the drilling muds and water-based drilling muds.
    Type: Application
    Filed: September 18, 2020
    Publication date: March 25, 2021
    Applicant: Texas A&M University
    Inventors: Jenn-Tai Liang, Hulli Guan
  • Enzyme-Encapsulated Hydrogel Nanoparticles for Hydraulic Fracturing Fluid Cleanup
    Publication number: 20210009891
    Abstract: Provided herein is a hydraulic fracturing fluid containing enzyme encapsulated hydrogel nanoparticles and a breaker composition of a viscosifier-degrading enzyme encapsulated in the hydrogel nanoparticle. Also provided are methods for hydraulic fracturing utilizing hydrogel nanoparticles encapsulating an enzyme as a breaker to prevent the premature degradation of the fracturing fluid, to improve transport and placement of the proppant and to facilitate subsequent cleaning of the fracturing fluid.
    Type: Application
    Filed: September 25, 2020
    Publication date: January 14, 2021
    Applicant: Texas A&M University
    Inventors: Jenn-Tai Liang, Hulli Guan