Patents by Inventor John Alexander Gordon Dewar

John Alexander Gordon 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).

  • Method of sealing an annular space in a wellbore
    Patent number: 7578347
    Abstract: A method of sealing a space in a wellbore formed in an earth formation comprises inserting a plurality of swellable particles into the space by pumping them in a carrier fluid, the particles being susceptible to swelling upon contact with a selected fluid, and inducing the selected fluid to contact the swelleable particles whereby the swelleable particles swell so as to form a body of swollen particles in the space.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: August 25, 2009
    Assignee: Shell Oil Company
    Inventors: Martin Gerard Rene Bosma, Erik Kerst Cornelissen, John Alexander Gordon Dewar
  • Method of creating a borehole in an earth formation
    Patent number: 7546886
    Abstract: A method of creating a borehole in an earth formation is provided. The method involves the steps of drilling a section of the borehole and lowering an expandable tubular element into the borehole whereby a lower portion of the tubular element extends into the drilled borehole section, radially expanding the lower portion of the tubular element so as to form a casing in the drilled borehole section, and separating an upper portion of the tubular element from the lower portion so as to allow the separated upper portion to be moved relative to the lower portion.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: June 16, 2009
    Assignee: Shell Oil Company
    Inventors: Scott Anthony Benzie, John Alexander Gordon Dewar, Andrei Gregory Filippov, Paul Dirk Schilte
  • Method of Sealing an Annular Space In a Wellbore
    Publication number: 20080135250
    Abstract: A method of sealing a space in a wellbore formed in an earth formation, the method comprising the steps of inserting a plurality of swelleable particles into said space, the particles being susceptible to swelling upon contact with a selected fluid, and inducing said selected fluid to contact the swelleable particles whereby the swelleable particles swell so as to form a body of swollen particles in said space.
    Type: Application
    Filed: November 18, 2005
    Publication date: June 12, 2008
    Applicant: SHELL OIL COMPANY
    Inventors: Martin Gerard Rene Bosma, Erik Kerst Cornelissen, John Alexander Gordon Dewar