Patents by Inventor Stefan Alexandru Stoian

Stefan Alexandru Stoian 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 making and using a drilling fluid
    Patent number: 11591506
    Abstract: A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: February 28, 2023
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • METHOD FOR MAKING AND USING A DRILLING FLUID
    Publication number: 20210071058
    Abstract: A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Application
    Filed: November 23, 2020
    Publication date: March 11, 2021
    Inventors: STEFAN ALEXANDRU STOIAN, CARL KEITH SMITH
  • Method for making and using a drilling fluid
    Patent number: 10876027
    Abstract: A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: December 29, 2020
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • Drilling fluid and method for drilling in coal-containing formations
    Patent number: 10738229
    Abstract: A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: August 11, 2020
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • METHOD FOR MAKING AND USING A DRILLING FLUID
    Publication number: 20170058179
    Abstract: A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Application
    Filed: November 16, 2016
    Publication date: March 2, 2017
    Inventors: STEFAN ALEXANDRU STOIAN, CARL KEITH SMITH
  • Drilling fluid and method for drilling in coal-containing formations
    Patent number: 8387723
    Abstract: A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: March 5, 2013
    Assignee: Tech-Star Fluid Systems Inc.
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • Drilling fluid and methods
    Patent number: 8338340
    Abstract: A drilling fluid comprising: a non-ionic surfactant including at least one of a branched alcohol ethoxylate and a capped alcohol ethoxylate, a detergent builder and a viscosifier.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: December 25, 2012
    Assignee: Tech-Star Fluid Systems Inc.
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • DRILLING FLUID AND METHODS
    Publication number: 20110281777
    Abstract: A drilling fluid comprising: a non-ionic surfactant including at least one of a branched alcohol ethoxylate and a capped alcohol ethoxylate, a detergent builder and a viscosifier.
    Type: Application
    Filed: July 28, 2011
    Publication date: November 17, 2011
    Applicant: TECHSTAR ENERGY SERVICES
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • Drilling fluid and methods
    Patent number: 7989399
    Abstract: A drilling fluid comprising: a non-ionic surfactant including at least one of a branched alcohol ethoxylate and a capped alcohol ethoxylate, a detergent builder and a viscosifier.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: August 2, 2011
    Assignee: Techstar Energy Services Inc.
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • DRILLING FLUID AND METHOD FOR DRILLING IN COAL-CONTAINING FORMATIONS
    Publication number: 20100089650
    Abstract: A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Application
    Filed: March 3, 2008
    Publication date: April 15, 2010
    Applicant: TECHSTAR ENERGY SERVICES INC.
    Inventors: Stefan Alexandru Stoian, Carl Keith Smith
  • DRILLING FLUID AND METHODS
    Publication number: 20080217064
    Abstract: A drilling fluid comprising: a non-ionic surfactant including at least one of a branched alcohol ethoxylate and a capped alcohol ethoxylate, a detergent builder and a viscosifier.
    Type: Application
    Filed: February 4, 2008
    Publication date: September 11, 2008
    Applicant: TECHSTAR ENERGY SERVICES
    Inventors: STEFAN ALEXANDRU STOIAN, CARL KEITH SMITH