Patents by Inventor Colin Dewar

Colin Dewar 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: 9482067
    Abstract: A hydraulic anchor is coupled to a packer subassembly of a tool string. The hydraulic anchor, when actuated by fluid pressure, engages the surrounding wellbore, holding the tool string in place within the wellbore. A packer may then be actuated, held in position within the wellbore by the hydraulic anchor. In some embodiments, an inflatable packer may be held in the desired location by the hydraulic anchor. In some embodiments, a straddle packer assembly may be held in place by the hydraulic anchor. In some embodiments, a swellable packer may be held in place during the swelling process by the hydraulic anchor.
    Type: Grant
    Filed: June 21, 2014
    Date of Patent: November 1, 2016
    Assignee: TAM INTERNATIONAL, INC.
    Inventors: Colin Dewars, Philip Scott, Steven Scott
  • Publication number: 20140374119
    Abstract: A hydraulic anchor is coupled to a packer subassembly of a tool string. The hydraulic anchor, when actuated by fluid pressure, engages the surrounding wellbore, holding the tool string in place within the wellbore. A packer may then be actuated, held in position within the wellbore by the hydraulic anchor. In some embodiments, an inflatable packer may be held in the desired location by the hydraulic anchor. In some embodiments, a straddle packer assembly may be held in place by the hydraulic anchor. In some embodiments, a swellable packer may be held in place during the swelling process by the hydraulic anchor.
    Type: Application
    Filed: June 21, 2014
    Publication date: December 25, 2014
    Inventors: Colin Dewars, Philip Scott, Steven Scott
  • Patent number: 5096640
    Abstract: A method of producing a highly porous melt spun fibrous tube for use as a separation medium comprising melt spinning a blend containing from 30 to 70 parts by weight of a first polymeric component and from 70 to 30 parts by weight of a second polymeric component to form a tube having a wall consisting of interpenetrating networks of the two polymeric components and, using a suitable solvent, leaching out of the tube wall one of the two polymer networks so producing a tube having a wall comprising the other polymer network.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: March 17, 1992
    Assignee: Imperial Chemical Industries PLC
    Inventors: Harry Brody, Colin Dewar, Nigel Hayman