Patents by Inventor Hua T. Chan

Hua T. Chan 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).

  • Drilling fluid containing microspheres and use thereof
    Patent number: 6906009
    Abstract: The present invention provides a drilling fluid composition and a method of drilling comprising a drilling fluid, which may be oil- or water-based, and a composite microsphere component. The invention drilling fluid composition advantageously reduces the density of a conventional fluid, reduces costs associated with pumping and overcomes problems associated with conventional gas-injection processes. The invention uses conventional drilling and pumping equipment, requires no sea-floor based pumps and may be easily pressure-controlled to maintain the pressure of the fluid.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: June 14, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Madeline P. Shinbach, Domasius Nwabunma, Hua T. Chan, Andrew S. D'Souza
  • Drilling fluid containing microspheres and use thereof
    Publication number: 20040033905
    Abstract: The present invention provides a drilling fluid composition and a method of drilling comprising a drilling fluid, which may be oil- or water-based, and a composite microsphere component. The invention drilling fluid composition advantageously reduces the density of a conventional fluid, reduces costs associated with pumping and overcomes problems associated with conventional gas-injection processes. The invention uses conventional drilling and pumping equipment, requires no sea-floor based pumps and may be easily pressure-controlled to maintain the pressure of the fluid.
    Type: Application
    Filed: August 14, 2002
    Publication date: February 19, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Madeline P. Shinbach, Domasius Nwabunma, Hua T. Chan, Andrew S. D'Souza