Patents by Inventor Malcolm Coone

Malcolm Coone 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: 5566772
    Abstract: A casing joint is provided for use in landing a casing string in a well bore for an oil or gas well in a controlled manner so that movement of the casing string relative to the well bore does not cause the casing string to become damaged. The casing joint includes an inner tubular member disposed within an outer tubular member. The casing joint also includes a means for causing the inner tubular member to move axially relative to the outer tubular member in response to differential fluid pressures. The casing joint further includes a plurality of shear pins attaching the inner tubular member to the outer tubular member. The shear pins are selected to shear at a predetermined load so as to enable the inner tubular member to move axially relative to the outer tubular member. The casing joint also includes a pair of anti-rotation lugs which prevent the inner tubular member from rotating relative to the outer tubular member.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: October 22, 1996
    Assignee: Davis-Lynch, Inc.
    Inventors: Malcolm Coone, Thomas L. Kelley