Patents by Inventor Wen Shao Cao

Wen Shao Cao 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).

  • Star polymers and methods of use for downhole fluids
    Patent number: 11155748
    Abstract: An effective amount of amphiphilic star polymers and surfactants may be applied to downhole fluids containing oil-in-water and water-in-oil emulsions, such as drilling fluids, completion fluids, drill-in fluids, workover fluids, and remediation fluids, to stabilize the emulsions and improve rheological properties of these fluids for use in oil and gas production operations. The star polymers and surfactants may be applied to the downhole fluid separately or as a blend to generate emulsions within the fluid that have substantially uniform droplet size.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: October 26, 2021
    Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
    Inventors: Wen Shao Cao, Grant Mackenzie, Dennis Clapper
  • STAR POLYMERS AND METHODS OF USE FOR DOWNHOLE FLUIDS
    Publication number: 20210108128
    Abstract: An effective amount of amphiphilic star polymers and surfactants may be applied to downhole fluids containing oil-in-water and water-in-oil emulsions, such as drilling fluids, completion fluids, drill-in fluids, workover fluids, and remediation fluids, to stabilize the emulsions and improve rheological properties of these fluids for use in oil and gas production operations. The star polymers and surfactants may be applied to the downhole fluid separately or as a blend to generate emulsions within the fluid that have substantially uniform droplet size.
    Type: Application
    Filed: October 14, 2019
    Publication date: April 15, 2021
    Applicant: Baker Hughes Oilfield Operations LLC
    Inventors: Wen Shao Cao, Grant Mackenzie, Dennis Clapper