Patents by Inventor David Alexander Trevas

David Alexander Trevas 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).

  • Variable radius annular and ram packing unit and method
    Patent number: 8353497
    Abstract: A packing unit to seal a wellbore, the packing unit including at least one rotatable cam having a cam axis disposed about an axis of the wellbore, wherein the at least one rotatable cam is rotatable about the cam axis, the at least one rotatable cam comprising a seal recess formed in an outer periphery of the at least one rotatable cam, wherein the packing unit sealingly engages a tool in the wellbore by rotation of the at least one rotatable cam, bringing the seal recess into sealing contact with the tool.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: January 15, 2013
    Assignee: Hydril USA Manufacturing LLC
    Inventor: David Alexander Trevas
  • VARIABLE RADIUS ANNULAR AND RAM PACKING UNIT AND METHOD
    Publication number: 20100147536
    Abstract: A packing unit to seal a wellbore, the packing unit including at least one rotatable cam having a cam axis disposed about an axis of the wellbore, wherein the at least one rotatable cam is rotatable about the cam axis, the at least one rotatable cam comprising a seal recess formed in an outer periphery of the at least one rotatable cam, wherein the packing unit sealingly engages a tool in the wellbore by rotation of the at least one rotatable cam, bringing the seal recess into sealing contact with the tool.
    Type: Application
    Filed: December 15, 2008
    Publication date: June 17, 2010
    Inventor: David Alexander Trevas