Patents by Inventor Jerry D. Hull

Jerry D. Hull 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).

  • Method of sealing pores, and lost circulation additive therefor
    Patent number: 4247403
    Abstract: By separating the woody ring portion of corncobs from the pith and chaff portions a lost circulation additive for drilling muds is produced which does not appreciably increase the yield point of the drilling mud. Improved particle size distributions for lost circulation additives is also given and claimed which permits low concentrations of the additive to produce seals withstanding 1000 psig.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: January 27, 1981
    Assignees: The Andersons, Rotary Drilling Services, Inc.
    Inventors: Kevin M. Foley, David I. B. VanderHooven, Jerry D. Hull