Patents by Inventor Andrew B. Mitchell

Andrew B. Mitchell 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).

  • BARRIER ARRANGEMENT IN WELLHEAD ASSEMBLY
    Publication number: 20230392466
    Abstract: A subsea wellhead assembly having an arrangement of primary well barriers provided in equipment that is located within the well and/or the wellhead housing is provided. The subsea wellhead assembly may include a tubing hanger positioned in or below a wellhead housing coupled to a subsea well, a tree cap fluidly coupled to the tubing hanger and disposed atop the wellhead housing, and a pair of master production valves configured to be selectively actuated from an open position to a closed position to shut in the subsea well, each of the pair of master production valves located within or below the wellhead housing.
    Type: Application
    Filed: August 22, 2023
    Publication date: December 7, 2023
    Inventors: Chris D. Bartlett, Daniel J. McLaughlin, Raymond A. Guillory, Blake T. DeBerry, Marcus Smedley, Gregory K. Norwood, David A. Scantlebury, Andrew B. Mitchell, Darren W. Mills
  • Barrier arrangement in wellhead assembly
    Patent number: 11773678
    Abstract: A subsea wellhead assembly having an arrangement of primary well barriers provided in equipment that is located within the well and/or the wellhead housing is provided. The subsea wellhead assembly may include a tubing hanger positioned in or below a wellhead housing coupled to a subsea well, a tree cap fluidly coupled to the tubing hanger and disposed atop the wellhead housing, and a pair of master production valves configured to be selectively actuated from an open position to a closed position to shut in the subsea well, each of the pair of master production valves located within or below the wellhead housing.
    Type: Grant
    Filed: August 16, 2022
    Date of Patent: October 3, 2023
    Assignee: Dril-Quip, Inc.
    Inventors: Chris D. Bartlett, Daniel J. McLaughlin, Raymond Guillory, Blake T. DeBerry, Marcus Smedley, Gregory K. Norwood, David A. Scantlebury, Andrew B. Mitchell, Darren W. Mills
  • Rigidized Seal Assembly Using Automated Space-Out Mechanism
    Publication number: 20230026935
    Abstract: A seal assembly is provided. The seal includes an upper body; a lower body having a seal for sealing between a first wellhead system component and a second wellhead system component; and a space-out mechanism disposed between the upper body and the lower body, the space-out mechanism comprising a ramp ring having at least one tapered surface. The upper body has at least one tapered surface configured to interface with the at least one tapered surface of the ramp ring, the ramp ring is configured to rotate relative to the upper body and the lower body, and the at least one tapered surface of the ramp ring and the at least one tapered surface of the upper body are configured to bear against each other to rigidize the system.
    Type: Application
    Filed: September 30, 2022
    Publication date: January 26, 2023
    Inventor: Andrew B. Mitchell
  • BARRIER ARRANGEMENT IN WELLHEAD ASSEMBLY
    Publication number: 20220389781
    Abstract: A subsea wellhead assembly having an arrangement of primary well barriers provided in equipment that is located within the well and/or the wellhead housing is provided. The subsea wellhead assembly may include a tubing hanger positioned in or below a wellhead housing coupled to a subsea well, a tree cap fluidly coupled to the tubing hanger and disposed atop the wellhead housing, and a pair of master production valves configured to be selectively actuated from an open position to a closed position to shut in the subsea well, each of the pair of master production valves located within or below the wellhead housing.
    Type: Application
    Filed: August 16, 2022
    Publication date: December 8, 2022
    Inventors: Chris D. Bartlett, Daniel J. McLaughlin, Ray Guillory, Blake T. DeBerry, Marcus Smedley, Gregory K. Norwood, David A. Scantlebury, Andrew B. Mitchell, Darren W. Mills