Patents by Inventor Stephane Pierre

Stephane Pierre 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).

  • Determining the pressure of formation fluid in earth formations surrounding a borehole
    Patent number: 7178392
    Abstract: A method for determining formation fluid pressure in earth formation surrounding a borehole wall uses a downhole probe coupled to a variable-volume cavity. The probe is driven into contact with formation at the borehole wall. The method includes expanding the volume of the cavity during a first period of time to establish fluid communication between tool fluid and formation fluid, by withdrawing a minimal amount of fluid from the formation. During a second period of time the tool pressure is allowed to equilibrate to formation pressure. When pressure equilibrium is established, formation fluid pressure is set equal to tool pressure. A preferred embodiment includes terminating expanding the volume of the cavity on detecting a break in the mud cake seal.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: February 20, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Brindesh Dhruva, Elizabeth B. Dussan, V., Aaron Jacobson, Jagdish Shah, Stephane Pierre, Fredrick A. Jenet, Michael G. Supp, Jennifer Trittschuh
  • Determining the pressure of formation fluid in earth formations surrounding a borehole
    Publication number: 20050039527
    Abstract: A method for determining formation fluid pressure in earth formation surrounding a borehole wall uses a downhole probe coupled to a variable-volume cavity. The probe is driven into contact with formation at the borehole wall. The method includes expanding the volume of the cavity during a first period of time to establish fluid communication between tool fluid and formation fluid, by withdrawing a minimal amount of fluid from the formation. During a second period of time the tool pressure is allowed to equilibrate to formation pressure. When pressure equilibrium is established, formation fluid pressure is set equal to tool pressure. A preferred embodiment includes terminating expanding the volume of the cavity on detecting a break in the mud cake seal.
    Type: Application
    Filed: August 20, 2003
    Publication date: February 24, 2005
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Brindesh Dhruva, Elizabeth B. Dussan V., Aaron Jacobson, Jagdish Shah, Stephane Pierre, Fredrick Jenet, Michael Supp, Jennifer Trittschuh
  • Apparatus and method for the treatment of water containing organic pollutants
    Patent number: 6030533
    Abstract: An apparatus and method for the treatment of contaminated water by biodegradation is provided. In particular, the apparatus and method are suited for the biodegradation of volatile organic compounds (VOC's) such as trichloroethylene and related compounds or benzene and related compounds. The process employs an immobilized soil bioreactor (ISBR) having a headspace re-circulation system.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: February 29, 2000
    Inventors: Dimitar Karamanev, Stephane Pierre, Chantal Lafontaine, Bruce Ramsay