Patents by Inventor Warren L. Frazier

Warren L. Frazier 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).

  • Patent number: 6796376
    Abstract: A composite bridge plug system for containing a well bore with reduced drill up time. The composite bridge plug system includes an elongate mandrel, a head member attached to a lower portion of the mandrel, an upper collar positioned about an upper portion of the mandrel, and a plurality of gripping members positioned about the mandrel. The gripping members are expandable outwardly when the mandrel is pulled upwardly with an engaging tube preventing the upward movement of the upper collar thereby compressing the gripping members. The upper portion of the mandrel includes a shear portion that is breakable by pulling upwardly upon the mandrel. An engaging portion surrounds the shear portion adjacent to the upper collar that is engageable with a lower slot within a head member of a higher bridge plug thereby preventing rotation of the higher bridge plug during drilling thereof.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: September 28, 2004
    Inventor: Warren L. Frazier
  • Publication number: 20040003928
    Abstract: A composite bridge plug system for containing a well bore with reduced drill up time. The composite bridge plug system includes an elongate mandrel, a head member attached to a lower portion of the mandrel, an upper collar positioned about an upper portion of the mandrel, and a plurality of gripping members positioned about the mandrel. The gripping members are expandable outwardly when the mandrel is pulled upwardly with an engaging tube preventing the upward movement of the upper collar thereby compressing the gripping members. The upper portion of the mandrel includes a shear portion that is breakable by pulling upwardly upon the mandrel. An engaging portion surrounds the shear portion adjacent to the upper collar that is engageable with a lower slot within a head member of a higher bridge plug thereby preventing rotation of the higher bridge plug during drilling thereof.
    Type: Application
    Filed: July 2, 2002
    Publication date: January 8, 2004
    Inventor: Warren L. Frazier