Patents by Inventor Mark Douglas Stephen

Mark Douglas Stephen 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).

  • Cutting tool
    Patent number: 10119373
    Abstract: A cutting tool adapted to be deployed into a well casing for cutting through casing strings comprises a nozzle for directing a jet of an abrasive slurry at the wall of a well casing to sever the well casing and a mechanical locking arranged provided above the nozzle, said locking arrangement comprises radially expandable means selectively engageable with an inner wall of the well casing within which the tool is deployed, to prevent axial and/or rotational movement of the tool in the well during cutting operations.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: November 6, 2018
    Assignee: PROSERV UK LIMITED
    Inventors: Adam James O'Leary, Mark Douglas Stephen, Richard James Taylor, Ross Richardson
  • CUTTING TOOL
    Publication number: 20150337634
    Abstract: A cutting tool adapted to be deployed into a well casing for cutting through casing strings comprises a nozzle for directing a jet of an abrasive slurry at the wall of a well casing to sever the well casing and a mechanical locking arranged provided above the nozzle, said locking arrangement comprises radially expandable means selectively engageable with an inner wall of the well casing within which the tool is deployed, to prevent axial and/or rotational movement of the tool in the well during cutting operations.
    Type: Application
    Filed: May 20, 2015
    Publication date: November 26, 2015
    Applicant: PROSERV UK LIMITED
    Inventors: Adam James O'Leary, Mark Douglas Stephen, Richard James Taylor, Ross Richardson