Patents by Inventor Terrell F. Wafford

Terrell F. Wafford 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 fabricating threaded connection for pipes
    Patent number: 4838068
    Abstract: The method of fabricating threaded pipe joints to eliminate variations in tensile strength produced by tolerance variations in the wall thickness of a pipe. Such tolerance variations are eliminated by cold forming and then machining the entire lengths of both the pin and box ends of the threaded pipe joint. A precise mathematical relationship between the root diameter of the threads and the wall thicknesses of the pin and box portions of the pipe eliminates the creation of critical areas having reduced tensile strength.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: June 13, 1989
    Assignee: Baker Hughes Incorporated
    Inventors: Frank J. Carlin, Terrell F. Wafford
  • Threaded connection for pipes and method of fabricating same
    Patent number: 4796928
    Abstract: The method of fabricating threaded pipe joints to eliminate variations in tensile strength produced by tolerance variations in the wall thickness of a pipe. Such tolerance variations are eliminated by cold forming and then machining the entire lengths of both the pin and box ends of the threaded pipe joint. A precise mathematical relationship between the root diameter of the threads and the wall thicknesses of the pin and box portions of the pipe eliminates the creation of critical areas having reduced tensile strength.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: January 10, 1989
    Assignee: Baker Hughes Incorporated
    Inventors: Frank J. Carlin, Terrell F. Wafford