Patents by Inventor Irfan Bulu

Irfan Bulu 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).

  • Publication number: 20220120931
    Abstract: An NMR well logging tool is provided that includes a sensor and associated electronic circuitry. The sensor includes an array of RF antenna elements. The electronic circuitry includes at least one low-power integrated circuit and a plurality of high-power modules corresponding the RF antenna elements of the array. Each high-power module is coupled to a corresponding RF antenna element of the array and includes an RF amplifier that is configured to amplify RF pulses generated by the at least one low-power integrated circuit and supplied thereto for transmission by the corresponding antenna element. In embodiments, the RF amplifier of each high-power module can include an H-bridge circuit or other suitable RF amplifier.
    Type: Application
    Filed: December 23, 2019
    Publication date: April 21, 2022
    Inventors: Yi-Qiao Song, Yiqiao Tang, Shin Utsuzawa, Tancredi Botto, Irfan Bulu, Martin Hurlimann
  • Patent number: 11262501
    Abstract: Optical fiber connections and their applications in downhole assemblies are described herein. The downhole assembly includes a well completion element with an end that couples with a corresponding well completion element. An optical fiber extends along at least a portion of the well completion element and transmits an optical signal using a first mode. The well completion element includes an optical fiber connector that is coupled to the optical fiber. The connector also includes a mode converter that receives the optical signal from the optical fiber and converts the optical signal from the first mode to a second larger mode. This second larger mode may be more robustly communicated to a corresponding optical fiber connector affixed to the corresponding well completion element.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: March 1, 2022
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Irfan Bulu, Francois M. Auzerais, Robert Graham, Mohamed Aly Sadek
  • Patent number: 11209321
    Abstract: A technique utilizes spatially resolved temperature measurements to infer the temperature of a subsea infrastructure. According to an embodiment, temperature data, e.g. a temperature map, is determined for the subsea infrastructure and comprises performing remote temperature measurements of water surrounding the subsea infrastructure. Additionally, a metrological scan of the subsea structure may be obtained. Furthermore, a simulation or simulations may be run for an assumed temperature profile along a surface of the subsea infrastructure. The data obtained from the remote temperature measurements, the metrological scan, and the simulation is processed to determine a temperature profile of the subsea infrastructure. This temperature profile can then be used to facilitate a variety of subsea infrastructure management decisions.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: December 28, 2021
    Assignee: OneSubsea IP UK Limited
    Inventors: Andrew Speck, Albert Ballard Andrews, Irfan Bulu, Yi-Qiao Song, Neil Herbst
  • Patent number: 10444397
    Abstract: An apparatus for measuring nuclear magnetic resonance (NMR) properties of subsurface formations includes a magnet for pre-polarizing nuclear spins in the formations. A plurality of transmitter antennas is spaced apart along a length of the apparatus. The apparatus includes at least one of a receiver circuit selectively coupled to at least one of the plurality of transmitter antennas and a separate receiver antenna. The apparatus includes circuitry for applying radio frequency current pulses selectively to each of the plurality of transmitter antennas such that during a NMR measurement sequence while the apparatus is moving substantially only those of the plurality of transmitter antennas having radio frequency current pulses applied thereto are disposed longitudinally along a same region of interest in the subsurface formations.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: October 15, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Martin Hurlimann, Irfan Bulu, Yi-Qiao Song
  • Publication number: 20190244737
    Abstract: Magnet design is provided. A method customizes a magnetic field uniformity of a magnet by introducing one or more gaps between pieces of the magnet assembly.
    Type: Application
    Filed: October 5, 2017
    Publication date: August 8, 2019
    Inventors: Yiqiao Tang, Irfan Bulu, Yi-Qiao Song, Mark Flaum, Tancredi Botto, Shin Utsuzawa
  • Publication number: 20190234808
    Abstract: A technique utilizes spatially resolved temperature measurements to infer the temperature of a subsea infrastructure. According to an embodiment, temperature data, e.g. a temperature map, is determined for the subsea infrastructure and comprises performing remote temperature measurements of water surrounding the subsea infrastructure. Additionally, a metrological scan of the subsea structure may be obtained. Furthermore, a simulation or simulations may be run for an assumed temperature profile along a surface of the subsea infrastructure. The data obtained from the remote temperature measurements, the metrological scan, and the simulation is processed to determine a temperature profile of the subsea infrastructure. This temperature profile can then be used to facilitate a variety of subsea infrastructure management decisions.
    Type: Application
    Filed: January 30, 2019
    Publication date: August 1, 2019
    Inventors: Andrew Speck, Albert Ballard Andrews, Irfan Bulu, Yi-Qiao Song, Neil Herbst
  • Publication number: 20180149765
    Abstract: An apparatus for measuring nuclear magnetic resonance (NMR) properties of subsurface formations includes a magnet for pre-polarizing nuclear spins in the formations. A plurality of transmitter antennas is spaced apart along a length of the apparatus. The apparatus includes at least one of a receiver circuit selectively coupled to at least one of the plurality of transmitter antennas and a separate receiver antenna. The apparatus includes circuitry for applying radio frequency current pulses selectively to each of the plurality of transmitter antennas such that during a NMR measurement sequence while the apparatus is moving substantially only those of the plurality of transmitter antennas having radio frequency current pulses applied thereto are disposed longitudinally along a same region of interest in the subsurface formations.
    Type: Application
    Filed: November 29, 2016
    Publication date: May 31, 2018
    Inventors: Martin Hurlimann, Irfan Bulu, Yi-Qiao Song
  • Publication number: 20170357051
    Abstract: Optical fiber connections and their applications in downhole assemblies are described herein. The downhole assembly includes a well completion element with an end that couples with a corresponding well completion element. An optical fiber extends along at least a portion of the well completion element and transmits an optical signal using a first mode. The well completion element includes an optical fiber connector that is coupled to the optical fiber. The connector also includes a mode converter that receives the optical signal from the optical fiber and converts the optical signal from the first mode to a second larger mode. This second larger mode may be more robustly communicated to a corresponding optical fiber connector affixed to the corresponding well completion element.
    Type: Application
    Filed: December 2, 2016
    Publication date: December 14, 2017
    Inventors: Irfan BULU, Francois M. AUZERAIS, Robert GRAHAM, Mohamed Aly SADEK
  • Patent number: 9771789
    Abstract: A downhole tool includes a cylindrical housing. A magnet and an antenna may be positioned within the housing. An excluder may be positioned around the housing, and a thickness of the excluder may vary around the housing.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: September 26, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Irfan Bulu, Yi-Qiao Song, Jagdish Shah
  • Publication number: 20150292316
    Abstract: A downhole tool includes a cylindrical housing. A magnet and an antenna may be positioned within the housing. An excluder may be positioned around the housing, and a thickness of the excluder may vary around the housing.
    Type: Application
    Filed: August 27, 2014
    Publication date: October 15, 2015
    Inventors: Irfan Bulu, Yi-Qiao Song, Jagdish Shah