Patents by Inventor Zhenxing Cheng

Zhenxing Cheng 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 for controlling production of excessive water and aqueous fluids in oil and gas wells
    Patent number: 12247160
    Abstract: Provided are methods for modifying the permeability of subterranean formations for the purposes of selectively reducing excessive production of water and aqueous fluids in oil and gas wells, wherein the methods utilize an emulsion containing a copolymer, which is typically prepared in an aqueous salt media.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: March 11, 2025
    Assignee: ENERGY SOLUTIONS (US) LLC
    Inventors: Chee Fei Chin, Zhihua Zhang, Zhenxing Cheng, Ahmed Rabie, Hoang Van Le
  • Inverting surfactants for inverse emulsions
    Patent number: 12018211
    Abstract: Water-in-oil emulsions are provided that include an alkyl propylene diamine and an ethoxylated alcohol as the inverting surfactant, which is present in an amount less than 5 percent by weight of the water-in-oil emulsion.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: June 25, 2024
    Assignee: RHODIA OPERATIONS
    Inventors: Stanley Gunawan, Zhihua Zhang, Shaopeng Zhang, Igor Pimkov, Zhenxing Cheng, Qi Qu
  • INVERTING SURFACTANTS FOR INVERSE EMULSIONS
    Publication number: 20230357629
    Abstract: Water-in-oil emulsions are provided that include an alkyl propylene diamine and an ethoxylated alcohol as the inverting surfactant, which is present in an amount less than 5 percent by weight of the water-in-oil emulsion.
    Type: Application
    Filed: June 9, 2020
    Publication date: November 9, 2023
    Applicant: RHODIA OPERATIONS
    Inventors: Stanley Gunawan, Zhihua Zhang, Shaopeng Zhang, Igor Pimkov, Zhenxing Cheng, Qi Qu
  • Polymer dispersion by controlled radical polymerization
    Patent number: 11649400
    Abstract: A polymer dispersion may include a water soluble copolymer, a water soluble salt, a polyol, and water. A method of preparing a polymer dispersion may include controlled radical polymerization. A method of using the polymer dispersion as a friction reducer in oil field processes.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: May 16, 2023
    Assignee: ENERGY SOLUTIONS (US) LLC
    Inventors: Zhenxing Cheng, Zhihua Zhang, Man Chen, Chee Fei Chin, David James Wilson
  • METHOD FOR CONTROLLING PRODUCTION OF EXCESSIVE WATER AND AQUEOUS FLUIDS IN OIL AND GAS WELLS
    Publication number: 20220275267
    Abstract: Provided are methods for modifying the permeability of subterranean formations for the purposes of selectively reducing excessive production of water and aqueous fluids in oil and gas wells, wherein the methods utilize an emulsion containing a copolymer, which is typically prepared in an aqueous salt media.
    Type: Application
    Filed: July 23, 2019
    Publication date: September 1, 2022
    Applicant: RHODIA OPERATIONS
    Inventors: Chee Fei Chin, Zhihua Zhang, Zhenxing Cheng, Ahmed Rabie, Hoang Van Le
  • POLYMER DISPERSION BY CONTROLLED RADICAL POLYMERIZATION
    Publication number: 20210340436
    Abstract: Disclosed is a polymer dispersion prepared by controlled radical polymerization and a use of the polymer dispersion as a friction reducer in oil field processes.
    Type: Application
    Filed: October 11, 2018
    Publication date: November 4, 2021
    Applicant: RHODIA OPERATIONS
    Inventors: Zhenxing Cheng, Zhihua Zhang, Man Chen, Chee Fei Chin, David James Wilson