Patents by Inventor Billy W. Hale

Billy W. Hale 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).

  • Well cementing method using low fluid-loss cement slurry
    Patent number: 4258790
    Abstract: An improved fluid loss additive for use in well cements, preferably comprising from about 30 to about 70 weight percent polyvinylpyrrolidone, from about 5 to about 19 weight percent carboxymethylhydroxyethyl cellulose, and the sodium salt of naphthalene sulfonate. Improved cement slurries comprising the subject fluid loss additive and an improved method for cementing well bores through use of the novel slurries are also provided. The improved cement slurries of the invention preferably comprise from about 26 to about 60 percent water and from about 0.75 to about 2 percent of the improved fluid loss additive, by weight of the cement.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: March 31, 1981
    Assignee: The Western Company of North America
    Inventor: Billy W. Hale