Patents Assigned to Hydra Fluids, Inc.
  • Drilling and completion fluid
    Patent number: 4780220
    Abstract: A drilling mud comprises water, a gelling agent, a defoamer and at least 6% by volume of a glycerine selected from the group consisting of glycerine, polyglycerine and mixtures thereof. The drilling mud is normally prepared by adding to a pre-existing water based mud having therein the gelling agent, caustic soda, lignite and lignosulfonate. A completion fluid comprises water, a defoamer and at least 6% by volume of a glycerine selected from the group consisting of glycerine, polyglycerine and mixtures thereof.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: October 25, 1988
    Assignee: Hydra Fluids, Inc.
    Inventor: Thomas E. Peterson