Patents Assigned to Engineering & Colloid, Ltd.
  • Well drilling and completion composition
    Patent number: 4826611
    Abstract: A well drilling and completion fluid having a potassium salt of a copolymer of (a) acrylic acid, or an .alpha.-substituted acrylic acid and (b) acrylate ester having the general formula CH.sub.2 .dbd.CH--COOR where R is an alkyl or hydroxalkyl having 1 to 4 carbon atoms and substituted R groups; and an accelerator catalyst composed of water, KOH, lignite, sulfonated polystyrene, and, optionally, a vinylsulfonate/vinylamide polymer.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: May 2, 1989
    Assignee: Engineering & Colloid, Ltd.
    Inventor: Boyton T. Blair
  • Well drilling and completion composition
    Patent number: 4715971
    Abstract: A well drilling and completion fluid having a potassium salt of a copolymer of (a) acrylic acid, or an .alpha.-substituted acrylic acid and (b) acrylate ester having the general formula CH.sub.2 .dbd.CH--COOR where R is an alkyl or hydroxyalkyl having 1 to 4 carbon atoms and substituted R groups; and an accelerator catalyst composed of water, KOH, lignite, sulfonated polystyrene, and, optionally, a vinylsulfonate/vinylamide polymer.
    Type: Grant
    Filed: December 9, 1985
    Date of Patent: December 29, 1987
    Assignee: Engineering & Colloid, Ltd.
    Inventor: Boyton T. Blair