Patents by Inventor Edward Michael Tollefsen

Edward Michael Tollefsen 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).

  • DOWNHOLE ELECTROMAGNETIC SENSING TECHNIQUES
    Publication number: 20210199836
    Abstract: An electromagnetic (EM) telemetry system includes an EM transmitter configured to transmit EM signals downhole and multiple sensors each configured to communicate with the EM transmitter and with another of the multiple sensors. Each sensor is placed a distance from another sensor along a length of a wellbore in the EM telemetry system. The EM telemetry system also includes a processor configured to select two or more sensors of the multiple sensors based on a signal to noise ratio (SNR) of an EM signal received from the two or more selected sensors, a depth of the EM transmitter, or both.
    Type: Application
    Filed: March 17, 2021
    Publication date: July 1, 2021
    Inventors: Jung Kee Chung, Sameer Bhoite, Dean Homan, Edward Michael Tollefsen, Jaroslav Dobos
  • DOWNHOLE ELECTROMAGNETIC SENSING TECHNIQUES
    Publication number: 20200200939
    Abstract: An electromagnetic (EM) telemetry system includes an EM transmitter configured to transmit EM signals downhole and multiple sensors each configured to communicate with the EM transmitter and with another of the multiple sensors. Each sensor is placed a distance from another sensor along a length of a wellbore in the EM telemetry system. The EM telemetry system also includes a processor configured to select two or more sensors of the multiple sensors based on a signal to noise ratio (SNR) of an EM signal received from the two or more selected sensors, a depth of the EM transmitter, or both.
    Type: Application
    Filed: March 2, 2020
    Publication date: June 25, 2020
    Inventors: Jung Kee Chung, Sameer Bhoite, Dean Homan, Edward Michael Tollefsen, Jaroslav Dobos
  • Downhole electromagnetic sensing techniques
    Patent number: 10598809
    Abstract: An electromagnetic (EM) telemetry system includes an EM transmitter configured to transmit EM signals downhole and multiple sensors each configured to communicate with the EM transmitter and with another of the multiple sensors. Each sensor is placed a distance from another sensor along a length of a wellbore in the EM telemetry system. The EM telemetry system also includes a processor configured to select two or more sensors of the multiple sensors based on a signal to noise ratio (SNR) of an EM signal received from the two or more selected sensors, a depth of the EM transmitter, or both.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: March 24, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Jung Kee Chung, Sameer Bhoite, Dean Homan, Edward Michael Tollefsen, Jaroslav Dobos
  • SEISMIC INVESTIGATIONS USING SEISMIC SENSOR
    Publication number: 20180045559
    Abstract: Systems capable of seismically investigating the earth can include seismic sources and a disposable seismic sensor such as a fiber optic seismic sensor included within a drill string. The fiber optic seismic sensor can include a plurality of fiber Bragg gratings. Related methods can include using the seismic sources and the fiber optic seismic sensor to conduct seismic investigations.
    Type: Application
    Filed: February 25, 2016
    Publication date: February 15, 2018
    Inventors: Andrew Hawthorn, Joel Herve Le Calvez, Colin Sayers, Jefferson Alford, Edward Michael Tollefsen
  • DOWNHOLE ELECTROMAGNETIC SENSING TECHNIQUES
    Publication number: 20180003849
    Abstract: An electromagnetic (EM) telemetry system includes an EM transmitter configured to transmit EM signals downhole and multiple sensors each configured to communicate with the EM transmitter and with another of the multiple sensors. Each sensor is placed a distance from another sensor along a length of a wellbore in the EM telemetry system. The EM telemetry system also includes a processor configured to select two or more sensors of the multiple sensors based on a signal to noise ratio (SNR) of an EM signal received from the two or more selected sensors, a depth of the EM transmitter, or both.
    Type: Application
    Filed: June 14, 2017
    Publication date: January 4, 2018
    Inventors: Jung Kee Chung, Sameer Bhoite, Dean Homan, Edward Michael Tollefsen, Jaroslav Dobos