Patents by Inventor Christopher Carter Johnson

Christopher Carter Johnson 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).

  • Methods and apparatus for a downhole tool
    Patent number: 8316943
    Abstract: An apparatus and method for operating a packer and a fracture valve. The packer may include a tubular mandrel having a longitudinal bore with an annular packing element and a first piston disposed around the mandrel, wherein the first piston is operable to set the packing element, and a second piston operable to isolate fluid communication between the first piston and the mandrel bore. The fracture valve may include a tubular mandrel having a longitudinal bore and a port, a piston operable to close fluid communication between the bore and the port, and a latch disposed between the piston and the mandrel operable to resist movement of the piston.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: November 27, 2012
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Walter Stone Thomas Fagley, IV, Gary Duron Ingram, Christopher Carter Johnson
  • METHODS AND APPARATUS FOR A DOWNHOLE TOOL
    Publication number: 20110030960
    Abstract: An apparatus and method for operating a packer and a fracture valve is shown. The packer may include a tubular mandrel having a longitudinal bore with an annular packing element and a first piston disposed around the mandrel, wherein the first piston is operable to set the packing element, and a second piston operable to isolate fluid communication between the first piston and the mandrel bore. The fracture valve may include a tubular mandrel having a longitudinal bore and a port, a piston operable to close fluid communication between the bore and the port, and a latch disposed between the piston and the mandrel operable to resist movement of the piston.
    Type: Application
    Filed: October 20, 2010
    Publication date: February 10, 2011
    Inventors: Walter Stone Thomas Fagley, IV, Gary Duron Ingram, Christopher Carter Johnson
  • METHODS AND APPARATUS FOR A DOWNHOLE TOOL
    Publication number: 20090242211
    Abstract: An apparatus and method for operating a packer and a fracture valve is shown. The packer may include a tubular mandrel having a longitudinal bore with an annular packing element and a first piston disposed around the mandrel, wherein the first piston is operable to set the packing element, and a second piston operable to isolate fluid communication between the first piston and the mandrel bore. The fracture valve may include a tubular mandrel having a longitudinal bore and a port, a piston operable to close fluid communication between the bore and the port, and a latch disposed between the piston and the mandrel operable to resist movement of the piston.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 1, 2009
    Inventors: Walter Stone Thomas Fagley, IV, Gary Duron Ingram, Christopher Carter Johnson