Patents by Inventor Carl Keith Smith

Carl Keith Smith 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
  • Drill fluid and method for tunneling
    Patent number: 11155742
    Abstract: A method for drilling a tunnel through a formation must address environmental concerns. One tunneling method comprises the steps of: preparing a mixed metal-viscosified drilling fluid including bentonite, a mixed metal viscosifier and controlling pH to 8.5 to 9.5 to permit a reaction between the bentonite and the mixed metal viscosifier; adding at least one of: (i) calcium sulfate and (ii) a potassium salt; and pumping the drilling fluid while drilling the tunnel with the pH lowered to 7-9. The amount of mixed metal viscosifier used can be limited such that the weight ratio of mixed metal viscosifier to MBT reaches up to 1:30. In the event that there is a problematic increase in viscosity, a non-toxic anionic thinner can be added to the drilling fluid. One such anionic thinner is a polyacrylate.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: October 26, 2021
    Assignee: Canadian Energy Services L.P.
    Inventors: Carl Keith Smith, Josh Gawryluk
  • 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
  • DRILL FLUID AND METHOD FOR TUNNELING
    Publication number: 20190316019
    Abstract: A method for drilling a tunnel through a formation must address environmental concerns. One tunneling method comprises the steps of: preparing a mixed metal-viscosified drilling fluid including bentonite, a mixed metal viscosifier and controlling pH to 8.5 to 9.5 to permit a reaction between the bentonite and the mixed metal viscosifier; adding at least one of: (i) calcium sulfate and (ii) a potassium salt; and pumping the drilling fluid while drilling the tunnel with the pH lowered to 7-9. The amount of mixed metal viscosifier used can be limited such that the weight ratio of mixed metal viscosifier to MBT reaches up to 1:30. In the event that there is a problematic increase in viscosity, a non-toxic anionic thinner can be added to the drilling fluid. One such anionic thinner is a polyacrylate.
    Type: Application
    Filed: June 22, 2018
    Publication date: October 17, 2019
    Applicant: Canadian Energy Services L.P.
    Inventors: Carl Keith SMITH, Josh GAWRYLUK
  • Drilling fluid
    Patent number: 10280353
    Abstract: A drilling fluid and method for drilling in a coal containing formation with a mixed metal-viscosified drilling fluid including at least 0.05% calcium sulfate.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: May 7, 2019
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventor: Carl Keith Smith
  • Drilling fluid and method for drilling a wellbore
    Patent number: 10202532
    Abstract: A method for drilling a wellbore into a formation uses a mixed metal-viscosified drilling fluid including at least 1% potassium salt and/or at least 0.05% calcium sulfate; circulating the drilling fluid through the well; and drilling into a formation. An anionic thinner may be added if the clay concentration of the drilling fluid reaches a problematic level to adversely affect pumpability of the fluid.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: February 12, 2019
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventor: Carl Keith Smith
  • DRILLING FLUID
    Publication number: 20180223154
    Abstract: A drilling fluid and method for drilling in a coal containing formation with a mixed metal-viscosified drilling fluid including at least 0.05% calcium sulfate.
    Type: Application
    Filed: April 10, 2018
    Publication date: August 9, 2018
    Inventor: CARL KEITH SMITH
  • Drilling fluid and method for drilling in coal-containing formations
    Patent number: 9969920
    Abstract: A drilling fluid and method for drilling in a coal containing formation with a mixed metal-viscosified drilling fluid including at least 0.05% calcium sulfate.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: May 15, 2018
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventor: Carl Keith Smith
  • Drilling fluid and method for drilling in coal-containing formations
    Patent number: 9850416
    Abstract: A drilling fluid and method for drilling in a coal containing formation with a mixed metal-viscosified drilling fluid including at least 0.05% calcium sulfate.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: December 26, 2017
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventor: Carl Keith Smith
  • DRILLING FLUID AND METHOD FOR DRILLING A WELLBORE
    Publication number: 20170174973
    Abstract: A method for drilling a wellbore into a formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt and/or at least 0.05% calcium sulfate; circulating the drilling fluid through the well; and drilling into a formation. An anionic thinner may be added if the clay concentration of the drilling fluid reaches a problematic level to adversely affect pumpability of the fluid.
    Type: Application
    Filed: March 6, 2017
    Publication date: June 22, 2017
    Inventor: CARL KEITH SMITH
  • Drilling fluid and method for drilling a wellbore
    Patent number: 9670394
    Abstract: A method for drilling a wellbore into a formation uses a mixed metal-viscosified drilling fluid including at least 1% potassium salt and/or at least 0.05% calcium sulfate; circulating the drilling fluid through the well; and drilling into a formation. An anionic thinner may be added if the clay concentration of the drilling fluid reaches a problematic level to adversely affect pumpability of the fluid.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: June 6, 2017
    Assignee: CANADIAN ENERGY SERVICES L.P.
    Inventor: Carl Keith Smith
  • DRILLING FLUID AND METHOD FOR DRILLING IN COAL-CONTAINING FORMATIONS
    Publication number: 20170058178
    Abstract: A drilling fluid and method for drilling in a coal containing formation with a mixed metal-viscosified drilling fluid including at least 0.05% calcium sulfate.
    Type: Application
    Filed: November 10, 2016
    Publication date: March 2, 2017
    Inventor: 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 METHODS
    Publication number: 20160024368
    Abstract: A drilling fluid comprising: a non-ionic surfactant including: a branched alcohol ethoxylate and/or a capped alcohol ethoxylate; and a detergent builder.
    Type: Application
    Filed: August 13, 2015
    Publication date: January 28, 2016
    Inventor: CARL KEITH SMITH
  • DRILLING FLUID AND METHODS
    Publication number: 20140213489
    Abstract: A drilling fluid comprising: a non-ionic surfactant including: a branched alcohol ethoxylate and/or a capped alcohol ethoxylate; and a detergent builder.
    Type: Application
    Filed: April 3, 2014
    Publication date: July 31, 2014
    Inventor: CARL KEITH SMITH
  • Drilling fluid and methods
    Patent number: 8703658
    Abstract: A drilling fluid comprising: a non-ionic surfactant including: a branched alcohol ethoxylate and/or a capped alcohol ethoxylate; and a detergent builder.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: April 22, 2014
    Assignee: Canadian Energy Services L.P.
    Inventor: Carl Keith Smith
  • DRILLING FLUID AND METHOD FOR DRILLING IN COAL-CONTAINING FORMATIONS
    Publication number: 20130206479
    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 0.05% calcium sulfate; circulating the drilling fluid through the well; and drilling into a coal seam.
    Type: Application
    Filed: August 26, 2011
    Publication date: August 15, 2013
    Applicant: TECH-STAR FLUID SYSTEMS INC.
    Inventor: 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