Patents Assigned to M-I Drilling Fluids
  • Silicone oil-based drilling fluids
    Patent number: 5707939
    Abstract: The present invention relates to an improved continuous phase for a drilling fluid and specifically a silicone continuous phase which is non-polluting and substantially non-toxic. Preferred silicones for use in the invention are dimethylsiloxane polymers. In the drilling fluid compositions, suitable emulsifiers, wetting agents, viscosifiers, weight materials and fluid loss additives may be added in conjunction with water and/or a brine phase for desired rheological properties.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: January 13, 1998
    Assignee: M-I Drilling Fluids
    Inventor: Arvind D. Patel