Patents Assigned to Burns, Stevenson & Associates, Ltd.
  • Patent number: 5609457
    Abstract: An alignment apparatus for use on a well derrick or drilling rig for engagement with a pipe section either being connected to or disengaged from the upper end of pipe string within a well bore hole. The apparatus includes a supporting frame for connection to the framework of the derrick and carrying a head assembly for engaging an upper pipe section in a manner to align the pipe section with a pipe section within the bore hole and yet allowing rotation of the upper pipe section. The head assembly includes a fixed pipe engaging member and movable arms pivotable to a closed position, the pipe engaging member and the arms all having pipe engaging surfaces.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: March 11, 1997
    Assignee: Burns, Stevenson & Associates, Ltd.
    Inventor: Kenneth M. Burns