Patents Assigned to M-l Drilling Fluids U.K. Limited
  • Copolymer for shale stabilization and method of use
    Patent number: 8889602
    Abstract: Embodiments disclosed herein relate to methods for stabilizing shales while drilling a wellbore into an earthen formation comprising circulating an aqueous based wellbore fluid in the wellbore while drilling through shales; wherein the aqueous-based wellbore fluid comprises a copolymer of acrylamide-type comonomers and at least one cationic comonomer.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: November 18, 2014
    Assignee: M-l Drilling Fluids U.K. Limited
    Inventor: Stephen Cliffe