Patents by Inventor Ed Kragh

Ed Kragh 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).

  • Seismic acquisition system including a distributed sensor having an optical fiber
    Patent number: 9316754
    Abstract: A seismic acquisition system includes a distributed optical sensor (having an optical fiber) and an interrogation subsystem configured to generate a light signal to emit into the optical fiber. The interrogation subsystem receives, from the distributed optical sensor, backscattered light responsive to the emitted light signal, wherein the backscattered light is affected by one or both of seismic signals reflected from a subterranean structure and noise. Output data corresponding to the backscattered light is provided to a processing subsystem to determine a characteristic of the subterranean structure.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: April 19, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Ed Kragh, Everhard Muyzert, Johan Robertsson, Douglas E. Miller, Arthur H. Hartog
  • SEISMIC ACQUISITION SYSTEM INCLUDING A DISTRIBUTED SENSOR HAVING AN OPTICAL FIBER
    Publication number: 20150076334
    Abstract: A seismic acquisition system includes a distributed optical sensor (having an optical fiber) and an interrogation subsystem configured to generate a light signal to emit into the optical fiber. The interrogation subsystem receives, from the distributed optical sensor, backscattered light responsive to the emitted light signal, wherein the backscattered light is affected by one or both of seismic signals reflected from a subterranean structure and noise. Output data corresponding to the backscattered light is provided to a processing subsystem to determine a characteristic of the subterranean structure.
    Type: Application
    Filed: November 21, 2014
    Publication date: March 19, 2015
    Inventors: Ed Kragh, Everhard Muyzert, Johan Robertsson, Douglas E. Miller, Arthur H. Hartog
  • Seismic acquisition system including a distributed sensor having an optical fiber
    Patent number: 8924158
    Abstract: A seismic acquisition system includes a distributed optical sensor (having an optical fiber) and an interrogation subsystem configured to generate a light signal to emit into the optical fiber. The interrogation subsystem receives, from the distributed optical sensor, backscattered light responsive to the emitted light signal, wherein the backscattered light is affected by one or both of seismic signals reflected from a subterranean structure and noise. Output data corresponding to the backscattered light is provided to a processing subsystem to determine a characteristic of the subterranean structure.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: December 30, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Ed Kragh, Everhard Muyzert, Johan Robertsson, Douglas E. Miller, Arthur H. Hartog
  • Acquiring near zero offset survey data
    Patent number: 8467264
    Abstract: To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second streamer separate from the survey source and the first streamer includes survey receivers. Near-zero offset data is measured using the at least one survey receiver of the first streamer.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: June 18, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: Henk Keers, Aslaug Stroemmen Melboe, Jon-Fredrik Hopperstad, Johan O. A. Robertsson, Ed Kragh, Morten Svendsen, Luren Yang, Svein Arne Frivik
  • REMOVING FREE-SURFACE EFFECTS FROM SEISMIC DATA ACQUIRED IN A TOWED SURVEY
    Publication number: 20120275264
    Abstract: A technique includes towing a spread of at least one streamer to acquire seismic data in response to energy produced by a seismic source. The technique includes towing the seismic source at least 100 meters behind a front end of the spread to configure the spread to acquire a split spread gather record.
    Type: Application
    Filed: July 2, 2012
    Publication date: November 1, 2012
    Applicant: WESTERNGECO L.L.C.
    Inventors: CLEMENT KOSTOV, MARTIN MUSIL, JOHAN ROBERTSSON, ED KRAGH
  • SEISMIC ACQUISITION SYSTEM INCLUDING A DISTRIBUTED SENSOR HAVING AN OPTICAL FIBER
    Publication number: 20120035854
    Abstract: A seismic acquisition system includes a distributed optical sensor (having an optical fiber) and an interrogation subsystem configured to generate a light signal to emit into the optical fiber. The interrogation subsystem receives, from the distributed optical sensor, backscattered light responsive to the emitted light signal, wherein the backscattered light is affected by one or both of seismic signals reflected from a subterranean structure and noise. Output data corresponding to the backscattered light is provided to a processing subsystem to determine a characteristic of the subterranean structure.
    Type: Application
    Filed: August 9, 2010
    Publication date: February 9, 2012
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ed Kragh, Everhard Muyzert, Johan Robertsson, Douglas E. Miller, Arthur H. Hartog
  • REMOVING FREE-SURFACE EFFECTS FROM SEISMIC DATA ACQUIRED IN A TOWED SURVEY
    Publication number: 20110044127
    Abstract: A technique includes towing a spread of at least one streamer to acquire seismic data in response to energy produced by a seismic source. The technique includes towing the seismic source at least 100 meters behind a front end of the spread to configure the spread to acquire a split spread gather record.
    Type: Application
    Filed: August 19, 2009
    Publication date: February 24, 2011
    Inventors: Clement Kostov, Martin Musil, Johan Robertsson, Ed Kragh
  • ACQUIRING NEAR ZERO OFFSET SURVEY DATA
    Publication number: 20090296520
    Abstract: To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second streamer separate from the survey source and the first streamer includes survey receivers. Near-zero offset data is measured using the at least one survey receiver of the first streamer.
    Type: Application
    Filed: June 3, 2008
    Publication date: December 3, 2009
    Inventors: Henk Keers, Aslaug Stroemmen Melboe, Jon-Fredrik Hopperstad, Johan O.A. Robertsson, Ed Kragh, Morten Svendsen, Luren Yang, Svein Arne Frivik