Patents by Inventor Simon Lawrence Fisher

Simon Lawrence Fisher 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).

  • Multilateral well and electrical transmission system
    Patent number: 6318457
    Abstract: There is provided a multilateral well and electric transmission system comprising a branch well tubular in a branch wellbore which is connected in an electrically conductive manner to a primary well tubular in a primary wellbore such that the primary and branch well tubulars form a link for transmission of electrical power and/or signals between the primary and branch wellbores. Low voltage electrical power can be transmitted from the surface to a battery in the branch wellbore to trickle-charge the battery and signals from battery-actuated measuring and control equipment in the branch wellbore can be transmitted back to surface via the walls of the electrically interconnected primary and branch well tubulars.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: November 20, 2001
    Assignee: Shell Oil Company
    Inventors: Johannis Josephus Den Boer, Simon Lawrence Fisher, Anthony Evert Kuperij, John Foreman Stewart
  • System for sealing the intersection between a primary and a branch borehole
    Patent number: 6244337
    Abstract: A system for sealing the intersection between a primary borehole and a branch borehole comprises a primary casing section located in the primary borehole in the region of the branchpoint, and a branch casing section located in the branch borehole and secured to the primary casing section. The primary casing section is tubular and defines a slant surface which intersects a central axis of the primary casing section at an acute angle, so that the primary casing section can be pressed towards the branchpoint by means of a hollow whipstock or other wedge-shaped element.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: June 12, 2001
    Assignee: Shell Oil Company
    Inventors: Francis Alexander Cumming, Simon Lawrence Fisher, Wilhelmus Christianus Maria Lohbeck
  • Creating zonal isolation between the interior and exterior of a well system
    Patent number: 6070671
    Abstract: A method is provided for creating zonal isolation between the exterior and interior of an uncased section of an underground well system which is located adjacent to a well section in which a well casing is present. The method includes inserting an expandable tubular through the existing well casing into an uncased section, such as a lateral branch, of the underground well system and subsequently expanding the expandable tubular such that the one end is pressed towards the wall of the uncased section of the well system and the outer surface of the other end is pressed against the inner surface of the well casing thereby creating an interference fit capable of achieving a shear bond and a hydraulic seal between the surrounding surfaces.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: June 6, 2000
    Assignee: Shell Oil Company
    Inventors: Francis Alexander Cumming, Simon Lawrence Fisher, Robert Bruce Stewart