Patents by Inventor Eric P. Donzier

Eric P. Donzier 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).

  • Protective barriers for small devices
    Patent number: 7673679
    Abstract: Protective barriers for small devices, such as sensors, actuators, flow control devices, among others, protect the devices from erosive and/or corrosive fluids, for example, formation fluids under harsh downhole conditions. The protective barriers include protective coatings and fluid diverting structures in the fluid flow which facilitate use of the small devices in high temperature-high pressure applications with erosive and/or corrosive fluids that are often found in downhole environments.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: March 9, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Christopher Harrison, Oliver C. Mullins, Olivier Vancauwenberghe, Eric P. Donzier, Akihito Chikenji, Anthony Robert Holmes Goodwin, Julian J. Pop
  • Diaphragm pressure sensor including anti-stock protection means and gradiomanometer incorporating such a sensor
    Patent number: 5509312
    Abstract: A pressure sensor (20) comprises a deformable diaphragm (22) which closes a fluid passage (18) in sealed manner. In order to protect the diaphragm (22) from shocks, the passage includes a restriction (44) whose dimensions are so designed as to limit the pressure peak applied to the diaphragm to a cutoff value which the diaphragm can withstand. The restriction (44) may be formed in a detachable capillary tube (42) or it may be in the form of grooves in a small silicon plate integrated in the active portion of the sensor.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: April 23, 1996
    Assignee: Schlumberger Technology Corporation
    Inventors: Eric P. Donzier, Fadhel Rezgui