Patents by Inventor Gerard Boisson

Gerard Boisson 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 for actuating a tool in a well at a given depth and tool allowing the method to be implemented
    Patent number: 4640354
    Abstract: A downhole tool is actuated at chosen well depth by selection of a control element that melts at the chosen depth well temperature. In one form of tool, a fusible pin melts to release spring-loaded jaws which move against an expansion cone to anchor the tool in the well. In another form, a fusible receptacle cover melts to release a quantity of dense fluid under action of gravity. Suitable control elements are formed of bismuth, with lead and zinc.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: February 3, 1987
    Assignee: Schlumberger Technology Corporation
    Inventor: Gerard Boisson