Patents by Inventor Darrell Wells

Darrell Wells 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).

  • Compounds and method for generating a highly efficient membrane in water-based drilling fluids
    Patent number: 6997270
    Abstract: A method is disclosed that affords improved stability to wellbores during drilling in argillaceous formations with water-based drilling fluids. The method comprises adding to the drilling fluid a compound of the invention having the capacity in water to generate a highly efficient membrane on argillaceous materials. The compound is soluble in the drilling fluid at least at the pH at which the compound is added to the drilling fluid or exists in the drilling fluid, but is insoluble in the water in the pores of the argillaceous formations, or at least at the pH of the water in such pores.
    Type: Grant
    Filed: December 30, 2000
    Date of Patent: February 14, 2006
    Assignees: Halliburton Energy Services, Inc.
    Inventors: Fersheed K. Mody, Kenneth W. Pober, Chee P. Tan, Calum J. Drummond, George Georgaklis, Darrell Wells
  • Urea-, glycerate- and, hydroxyamide-headed hydrocarbon chain lyotropic phases forming surfactants
    Publication number: 20050249665
    Abstract: The invention provides a compound containing a head group based on urea, glycerol or glycerate and a tail selected from the group consisting of a branched alkyl chain, a branched alkyloxy chain or an alkenyl chain. The compounds may be used as surfactants to form a lyotropic phase that is stable in excess polar solution.
    Type: Application
    Filed: March 4, 2005
    Publication date: November 10, 2005
    Applicant: DBL Australia Pty Ltd.
    Inventors: Benjamin Boyd, Gregory Davey, Calum Drummond, Celesta Fong, Patrick Hartley, Irena Krodkiewska, Annette Murphy, Russell Tait, Gregory Warr, Darrell Wells, Darryl Whittaker, Yuerong Ye
  • Novel compounds and method for generating a highly efficient membrane in water-based drilling fluids
    Publication number: 20040011563
    Abstract: A method is disclosed that affords improved stability to wellbores during drilling in argillaceous formations with water-based drilling fluids. The method comprises adding to the drilling fluid a compound of the invention having the capacity in water to generate a highly efficient membrane on argillaceous materials. The compound is soluble in the drilling fluid at least at the pH at which the compound is added to the drilling fluid or exists in the drilling fluid, but is insoluble in the water in the pores of the argillaceous formations, or at least at the pH of the water in such pores.
    Type: Application
    Filed: May 27, 2003
    Publication date: January 22, 2004
    Inventors: Fersheed K Mody, Kenneth W Pober, Chee Phuat Tan, Calum J Drummond, Geroge Georgaklis, Darrell Wells