Patents by Inventor Richard Lyell Holdren

Richard Lyell Holdren 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: 7741580
    Abstract: A method for welding a pipe section and a connector, where each of the pipe and connector have inner and outer beveled surfaces forming only a single angular alignment land when mated. The pipe and connector are welded together with only a single interior welding pass and with more than one exterior welding pass to fill the weld joints at the outer beveled surface, so as to weld the connector to the pipe.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: June 22, 2010
    Assignee: National Oilwell Varco, L.P.
    Inventor: Richard Lyell Holdren
  • Patent number: 7527301
    Abstract: The present invention is directed to a pipe section and a connector that are adapted to be welded together, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land. In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land. In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: May 5, 2009
    Assignee: Grant Prideco, L.P.
    Inventor: Richard Lyell Holdren
  • Patent number: 7510218
    Abstract: The present invention is directed to a pipe section (220) and a connector (400) that are adapted to be welded together, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land (60). In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land (60). In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: March 31, 2009
    Assignee: Grant Prideco, L.P.
    Inventor: Richard Lyell Holdren
  • Publication number: 20080264909
    Abstract: The present invention is directed to a method for welding a pipe section and a connector, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land. In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land. In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.
    Type: Application
    Filed: July 7, 2008
    Publication date: October 30, 2008
    Inventor: Richard Lyell Holdren
  • Publication number: 20080264908
    Abstract: The present invention is directed to a method for welding a pipe section and a connector, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land. In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land. In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.
    Type: Application
    Filed: July 7, 2008
    Publication date: October 30, 2008
    Inventor: Richard Lyell Holdren
  • Publication number: 20080265562
    Abstract: The present invention is directed to a method for welding a pipe section and a connector, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land. In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land. In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.
    Type: Application
    Filed: July 7, 2008
    Publication date: October 30, 2008
    Inventor: Richard Lyell Holdren
  • Publication number: 20080265572
    Abstract: The present invention is directed to a pipe section and a connector that are adapted to be welded together, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land. In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land. In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.
    Type: Application
    Filed: July 7, 2008
    Publication date: October 30, 2008
    Inventor: Richard Lyell Holdren
  • Publication number: 20080265573
    Abstract: The present invention is directed to a method for welding a pipe section and a connector, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land. In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land. In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.
    Type: Application
    Filed: July 7, 2008
    Publication date: October 30, 2008
    Inventor: Richard Lyell Holdren