Patents by Inventor CHRISTOPHER S. McARTHUR

CHRISTOPHER S. McARTHUR 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: 9890603
    Abstract: A tubing anchor catcher for anchoring well equipment in a well conduit to arrest movement in both longitudinal directions and rotational directions. A mandrel connected to the equipment has one or more grooves for slideably receiving respective drive pins from a drag body on the mandrel. A slip cage on the mandrel houses a slip or slips for selectively engaging and disengaging the conduit. Manipulation of the mandrel at surface causes the drive pins to move within the one or more grooves on the mandrel and the drag body conical surface to move toward the slip cage driving the slip or slips outward to grip the conduit. Further pulling at surface maintains the set position. The anchor is unset at surface by releasing the tension, rotating the mandrel in the second direction, and pulling the mandrel to disengage the slip or slips.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: February 13, 2018
    Assignee: Tazco Holdings Inc.
    Inventors: Edward L. Moore, Christopher S McArthur, Jasen L. Hoffman, Kevin D. Kelm
  • Publication number: 20150233199
    Abstract: A torque anchor for anchoring well equipment in a well conduit to arrest movement in both longitudinal directions and rotation in a first direction, but not rotation in an opposed second direction. A mandrel connected to the equipment has one or more grooves for slideably receiving respective pins from a drag body on the mandrel. A slip cage on the mandrel houses slips for selectively engaging and disengaging the conduit. Manipulation of the mandrel at surface causes the pins to move within the one or more grooves on the mandrel and the drag body to move toward the slip retainer driving the slips outward to grip the conduit. Further pulling at surface maintains the set position. The anchor is unseta surface by releasing the pull, rotating the mandrel in the second direction, and pushing the mandrel to disengage the slips.
    Type: Application
    Filed: May 6, 2015
    Publication date: August 20, 2015
    Applicant: TAZCO HOLDINGS INC.
    Inventors: EDWARD L. MOORE, CHRISTOPHER S MCARTHUR, JASEN L. HOFFMAN, KEVIN D. KELM
  • Publication number: 20150041153
    Abstract: A tubing anchor for anchoring and catching well equipment in a well conduit to arrest movement in both longitudinal directions and rotation in a first direction. A mandrel connected to the equipment has in one embodiment C or reverse C-shaped grooves when viewed in front elevation for slideably receiving respective pins from a drag body on the mandrel. A slip retainer on the mandrel houses slips for selectively engaging and disengaging the conduit. An initial pull of the mandrel causes the pins to move the drag body toward the slip retainer driving the slips outward to grip the conduit. Rotation of the mandrel in the first direction sets the anchor to arrest movement. Further pulling and a reversed turn of the mandrel maintains the set position. A spring biases the slips outward to maintain their set to catch the well equipment in the event of a break in the string above the anchor.
    Type: Application
    Filed: June 22, 2014
    Publication date: February 12, 2015
    Inventors: EDWARD L. MOORE, CHRISTOPHER S. McARTHUR, JASEN L. HOFFMAN, KEVIN D. KELM