Patents by Inventor Fredrick A. Jenet

Fredrick A. Jenet 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
  • Methods and apparatus for determining chemical composition of reservoir fluids
    Patent number: 7095012
    Abstract: Methods of analyzing formation fluids in an oilfield environment are near-infrared absorption spectroscopy. Indications of near-infrared absorptions are analyzed to determine the concentration of compounds in a formation fluid sample.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: August 22, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Go Fujisawa, Oliver C. Mullins, Toru Terabayashi, Fredrick A. Jenet, Maria A. van Agthoven, Philip A. Rabbito
  • 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